/* Field Dynamics Documentation Stylesheet */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #1a1a1a;
    color: #e0e0e0;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* Navigation Bar */
.nav-bar {
    height: 60px;
    background: #0a0a0a;
    border-bottom: 1px solid #404040;
    display: flex;
    align-items: center;
    padding: 0 30px;
    flex-shrink: 0;
}

.nav-logo {
    font-size: 24px;
    font-weight: 600;
    color: #4da6ff;
    margin-right: 50px;
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}

.nav-items {
    display: flex;
    gap: 8px;
    flex: 1;
    align-items: center;
}

.nav-item {
    font-size: 14px;
    color: #b0b0b0;
    padding: 8px 16px;
    cursor: pointer;
    border: none;
    border-radius: 999px;
    transition: all 0.2s;
    user-select: none;
    line-height: 1;
}

.nav-item:hover {
    color: #e0e0e0;
    background-color: rgba(77, 166, 255, 0.12);
}

.nav-item-right {
    margin-left: auto;
}

.nav-item.active {
    color: #4da6ff;
    background-color: rgba(77, 166, 255, 0.18);
}

.nav-utility {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-version {
    color: #9a9a9a;
    font-size: 12px;
    white-space: nowrap;
}

.nav-github {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: #b0b0b0;
    text-decoration: none;
    font-size: 13px;
    line-height: 1;
}

.nav-github:hover {
    color: #4da6ff;
}

.nav-github svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
    display: block;
}

.nav-mobile-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid #2f3b50;
    border-radius: 10px;
    background: #111821;
    color: #d5e6ff;
    cursor: pointer;
    padding: 0;
    transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.nav-mobile-toggle:hover {
    background: #192334;
    border-color: #4da6ff;
    color: #e8f2ff;
}

.nav-mobile-toggle-icon {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    fill: none;
}

/* Nav dropdown menu (Help) */
.nav-dropdown {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-dropdown > .nav-item {
    cursor: pointer;
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 160px;
    background: #0a0a0a;
    border: 1px solid #333;
    border-top: none;
    border-radius: 0 0 6px 6px;
    padding: 4px 0;
    z-index: 100;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.nav-dropdown:hover .nav-dropdown-menu {
    display: block;
}

.nav-dropdown-item {
    display: block;
    font-size: 13px;
    color: #b0b0b0;
    padding: 10px 20px;
    text-decoration: none;
    transition: all 0.15s;
}

.nav-dropdown-item:hover {
    color: #e0e0e0;
    background: rgba(77, 166, 255, 0.1);
}

.nav-dropdown-divider {
    height: 1px;
    background: #2a2a2a;
    margin: 4px 0;
}

.nav-dropdown-version {
    display: block;
    font-size: 11px;
    color: #505050;
    padding: 6px 20px 8px;
    letter-spacing: 0.5px;
}

/* Screen Container */
.screen-container {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.screen {
    display: none;
    width: 100%;
    height: 100%;
}

.screen.active {
    display: flex;
}

/* Analysis Screen Layout */
#screen-analysis {
    display: none;
}

#screen-analysis.active {
    display: flex;
}

/* About Screen */
.about-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-y: auto;
    padding: 0 20px 60px 20px;
}

/* Dark scrollbar for About screen */
.about-screen::-webkit-scrollbar { width: 12px; }
.about-screen::-webkit-scrollbar-track { background: #1a1a1a; }
.about-screen::-webkit-scrollbar-thumb { background: #333; border-radius: 6px; border: 2px solid #1a1a1a; }
.about-screen::-webkit-scrollbar-thumb:hover { background: #444;
}

.about-hero {
    text-align: center;
    padding: 50px 0 30px 0;
    width: 100%;
    max-width: 960px;
}

.about-title {
    font-size: 2.8em;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 4px;
    margin: 0 0 8px 0;
}

.about-subtitle {
    font-size: 1.15em;
    color: #a0a0a0;
    font-weight: 400;
    letter-spacing: 0.5px;
    margin: 0 0 12px 0;
}

.about-version {
    font-size: 0.8em;
    color: #606060;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin: 0;
}

.about-content {
    width: 100%;
    max-width: 960px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about-card {
    background-color: #1e1e1e;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    padding: 28px 32px;
}

.about-card h2 {
    font-size: 0.85em;
    font-weight: 600;
    color: #4da6ff;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin: 0 0 16px 0;
}

.about-card p {
    font-size: 0.95em;
    color: #c0c0c0;
    line-height: 1.7;
    margin: 0 0 10px 0;
}

.about-card p:last-child {
    margin-bottom: 0;
}

.about-lead {
    font-size: 1.05em;
    color: #d0d0d0;
    line-height: 1.7;
    margin: 0;
}

.about-card strong {
    color: #ffffff;
}

.about-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.about-features li {
    font-size: 0.92em;
    color: #c0c0c0;
    line-height: 1.6;
    padding: 6px 0;
    border-bottom: 1px solid #2a2a2a;
}

.about-features li:last-child {
    border-bottom: none;
}

.about-features li strong {
    color: #e0e0e0;
}

.about-equation {
    margin: 14px 0;
    padding: 14px 24px;
    background: #161616;
    border: 1px solid #2a2a2a;
    border-radius: 4px;
    text-align: center;
}

.about-eq-line {
    font-size: 1.05em;
    color: #e0e0e0;
    font-family: 'Georgia', 'Times New Roman', serif;
    letter-spacing: 0.5px;
}

.about-repo-url {
    margin: 0;
}

.about-repo-url a {
    font-size: 1.05em;
    color: #4da6ff;
    text-decoration: none;
    font-weight: 500;
}

.about-repo-url a:hover {
    text-decoration: underline;
    color: #7dbfff;
}

.about-citation {
    background-color: #151515;
    border: 1px solid #2a2a2a;
    border-radius: 6px;
    padding: 20px 24px;
    font-size: 0.88em;
    color: #b0b0b0;
    line-height: 1.8;
}

.about-citation a {
    color: #4da6ff;
    text-decoration: none;
}

.about-citation a:hover {
    text-decoration: underline;
}

.about-citation strong {
    color: #d0d0d0;
}

.about-citation p {
    margin: 0 0 14px 0;
    font-size: 1em;
}

.about-citation p:last-child {
    margin-bottom: 0;
}

.about-references {
    list-style: none;
    padding: 0;
    margin: 0;
}

.about-references li {
    font-size: 0.88em;
    color: #999;
    line-height: 1.6;
    padding: 6px 0;
    border-bottom: 1px solid #2a2a2a;
}

.about-references li:last-child {
    border-bottom: none;
}

.about-references li em {
    color: #b0b0b0;
    font-style: italic;
}

/* Theory stack visualization */
.about-stack {
    margin: 16px 0;
}

.about-stack-item {
    display: flex;
    flex-direction: column;
    padding: 14px 18px;
    background: #161616;
    border: 1px solid #2a2a2a;
    border-radius: 6px;
    border-left: 3px solid #4da6ff;
}

.about-stack-label {
    font-size: 0.7em;
    font-weight: 600;
    color: #4da6ff;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 4px;
}

.about-stack-value {
    font-size: 1.05em;
    font-weight: 600;
    color: #e0e0e0;
    letter-spacing: 0.2px;
}

.about-stack-desc {
    font-size: 0.82em;
    color: #707070;
    margin-top: 4px;
    line-height: 1.5;
}

.about-stack-arrow {
    text-align: center;
    font-size: 1.1em;
    color: #333;
    padding: 4px 0;
    line-height: 1;
}

.about-footer {
    text-align: center;
    padding: 20px 0 0 0;
}

.about-footer p {
    font-size: 0.82em;
    color: #505050;
    letter-spacing: 0.3px;
}

/* ================================================================
   FAQ Screen
   ================================================================ */
.faq-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-y: auto;
    padding: 0 20px 60px 20px;
}

/* Dark scrollbar for FAQ screen */
.faq-screen::-webkit-scrollbar { width: 12px; }
.faq-screen::-webkit-scrollbar-track { background: #1a1a1a; }
.faq-screen::-webkit-scrollbar-thumb { background: #333; border-radius: 6px; border: 2px solid #1a1a1a; }
.faq-screen::-webkit-scrollbar-thumb:hover { background: #444; }

.faq-header {
    text-align: center;
    padding: 50px 0 20px 0;
    width: 100%;
    max-width: 960px;
}

.faq-title {
    font-size: 2em;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 2px;
    margin: 0 0 8px 0;
}

.faq-subtitle {
    font-size: 1em;
    color: #808080;
    font-weight: 400;
    margin: 0 0 24px 0;
}

/* Search input */
.faq-search-wrapper {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
}

.faq-search {
    width: 100%;
    padding: 12px 44px 12px 42px;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 8px;
    color: #e0e0e0;
    font-size: 0.95em;
    outline: none;
    transition: border-color 0.2s;
    box-sizing: border-box;
}

.faq-search:focus {
    border-color: #4da6ff;
}

.faq-search::placeholder {
    color: #606060;
}

.faq-search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1em;
    color: #606060;
    pointer-events: none;
}

.faq-search-clear {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1em;
    color: #606060;
    cursor: pointer;
    user-select: none;
    line-height: 1;
}

.faq-search-clear:hover {
    color: #b0b0b0;
}

/* Controls row */
.faq-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
}

.faq-expand-btn {
    padding: 6px 16px;
    background: #2a2a2a;
    border: 1px solid #404040;
    border-radius: 6px;
    color: #b0b0b0;
    font-size: 0.82em;
    cursor: pointer;
    transition: all 0.15s;
}

.faq-expand-btn:hover {
    background: #333;
    color: #e0e0e0;
    border-color: #555;
}

.faq-result-count {
    font-size: 0.82em;
    color: #606060;
    margin-left: 4px;
}

/* FAQ content area */
.faq-content {
    width: 100%;
    max-width: 960px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 24px;
}

/* Category heading */
.faq-category {
    font-size: 0.78em;
    font-weight: 600;
    color: #4da6ff;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin: 20px 0 8px 0;
    padding: 0 4px;
}

.faq-category:first-child {
    margin-top: 0;
}

/* Individual FAQ item */
.faq-item {
    background: #1e1e1e;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    overflow: hidden;
    transition: border-color 0.2s;
}

.faq-item:hover {
    border-color: #3a3a3a;
}

.faq-item.hidden {
    display: none;
}

.faq-question {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 16px 20px;
    cursor: pointer;
    user-select: none;
    gap: 16px;
}

.faq-question-text {
    font-size: 0.95em;
    color: #d0d0d0;
    font-weight: 500;
    line-height: 1.5;
    flex: 1;
}

.faq-item.open .faq-question-text {
    color: #ffffff;
}

.faq-chevron {
    font-size: 0.75em;
    color: #606060;
    transition: transform 0.2s;
    flex-shrink: 0;
    margin-top: 3px;
}

.faq-item.open .faq-chevron {
    transform: rotate(90deg);
    color: #4da6ff;
}

.faq-answer {
    display: none;
    padding: 0 20px 18px 20px;
    border-top: 1px solid #2a2a2a;
}

.faq-item.open .faq-answer {
    display: block;
}

.faq-answer p {
    font-size: 0.9em;
    color: #b0b0b0;
    line-height: 1.7;
    margin: 12px 0 0 0;
}

.faq-answer p:first-child {
    margin-top: 14px;
}

.faq-answer strong {
    color: #e0e0e0;
}

.faq-answer code {
    background: #161616;
    border: 1px solid #2a2a2a;
    border-radius: 3px;
    padding: 1px 5px;
    font-size: 0.9em;
    color: #4da6ff;
}

.faq-answer ul {
    margin: 10px 0 0 0;
    padding: 0 0 0 20px;
}

.faq-answer li {
    font-size: 0.9em;
    color: #b0b0b0;
    line-height: 1.7;
    margin: 4px 0;
}

/* Advanced math section within FAQ answer */
.faq-advanced {
    margin-top: 14px;
    padding: 16px 20px;
    background: #161616;
    border: 1px solid #2a2a2a;
    border-radius: 6px;
    border-left: 3px solid #4da6ff;
}

.faq-advanced-label {
    font-size: 0.75em;
    font-weight: 600;
    color: #4da6ff;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin: 0 0 10px 0;
}

.faq-advanced p {
    font-size: 0.88em;
    color: #a0a0a0;
    line-height: 1.75;
    margin: 8px 0 0 0;
}

.faq-advanced p:first-of-type {
    margin-top: 0;
}

.faq-advanced strong {
    color: #d0d0d0;
}

.faq-advanced ul {
    margin: 8px 0 0 0;
    padding: 0 0 0 18px;
}

.faq-advanced li {
    font-size: 0.88em;
    color: #a0a0a0;
    line-height: 1.75;
    margin: 3px 0;
}

.faq-eq {
    display: block;
    margin: 10px 0;
    padding: 10px 16px;
    background: #111;
    border: 1px solid #2a2a2a;
    border-radius: 4px;
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 1em;
    color: #e0e0e0;
    letter-spacing: 0.3px;
    text-align: center;
    overflow-x: auto;
}

.faq-eq-label {
    display: block;
    font-size: 0.78em;
    color: #606060;
    text-align: center;
    margin-top: 2px;
    font-family: inherit;
    letter-spacing: 0;
}

.faq-step {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin: 6px 0;
}

.faq-step-num {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    background: #2a2a2a;
    border-radius: 50%;
    color: #4da6ff;
    font-size: 0.75em;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 2px;
}

.faq-step-text {
    font-size: 0.88em;
    color: #a0a0a0;
    line-height: 1.6;
}

.faq-step-text strong {
    color: #d0d0d0;
}

/* Highlight matched search text */
.faq-highlight {
    background: rgba(77, 166, 255, 0.2);
    color: #ffffff;
    border-radius: 2px;
    padding: 0 2px;
}

/* No results state */
.faq-no-results {
    text-align: center;
    padding: 60px 20px;
    color: #606060;
    font-size: 0.95em;
}

/* Legacy placeholder (kept for compatibility) */
.placeholder-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 50px;
}

.placeholder-screen .coming-soon {
    margin-top: 30px;
    padding: 15px 30px;
    background-color: #2a2a2a;
    border: 1px solid #404040;
    border-radius: 8px;
    color: #4da6ff;
    font-weight: 500;
}

/* =====================================================================
   Command Bar: top-level controls (mode, galaxy, distance)
   ===================================================================== */

.command-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 20px;
    background-color: #1e1e1e;
    border-bottom: 1px solid #333;
    flex-shrink: 0;
    gap: 16px;
}

.command-bar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.command-bar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.command-mode-toggle {
    display: flex;
    gap: 6px;
}

.command-mode-toggle .mode-button {
    padding: 6px 14px;
    font-size: 0.82em;
}

.command-separator {
    width: 1px;
    height: 28px;
    background: #404040;
    flex-shrink: 0;
}

.command-galaxy {
    display: flex;
    align-items: center;
}

.command-dropdown {
    background: #2a2a2a;
    color: #e0e0e0;
    border: 1px solid #404040;
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 0.85em;
    cursor: pointer;
    min-width: 240px;
    outline: none;
}

.command-dropdown:hover {
    border-color: #4da6ff;
}

.command-dropdown:focus {
    border-color: #4da6ff;
    box-shadow: 0 0 0 2px rgba(77, 166, 255, 0.15);
}

.command-distance {
    display: flex;
    align-items: center;
    gap: 8px;
}

.command-label {
    color: #808080;
    font-size: 0.82em;
    font-weight: 500;
    white-space: nowrap;
}

.command-slider {
    width: 120px;
    height: 4px;
}

.command-value {
    color: #4da6ff;
    font-size: 0.82em;
    font-family: 'Consolas', 'Monaco', monospace;
    min-width: 60px;
    text-align: right;
}

/* =====================================================================
   Analysis body: sidebar + chart below the command bar
   ===================================================================== */

.analysis-body {
    display: flex;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* =====================================================================
   Theory Toggle Bar (series data toggles; distinct from Charts submenu above)
   ===================================================================== */

.theory-toggles {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    flex-shrink: 0;
    flex-wrap: wrap;
}

.theory-toggles-label {
    color: #808080;
    font-size: 0.78em;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-right: 4px;
}

.theory-chip {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: 14px;
    border: 1px solid var(--chip-color, #808080);
    background: transparent;
    color: var(--chip-color, #808080);
    font-size: 0.78em;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, opacity 0.15s;
    user-select: none;
}

/* Hide the native checkbox; the chip itself is the toggle */
.theory-chip input[type="checkbox"] {
    display: none;
}

/* Active (checked) state: filled background */
.theory-chip.active {
    background: color-mix(in srgb, var(--chip-color, #808080) 20%, transparent);
}

/* Inactive (unchecked) state: dimmed */
.theory-chip:not(.active) {
    opacity: 0.4;
    border-style: dashed;
}

.theory-chip:hover {
    opacity: 1;
    background: color-mix(in srgb, var(--chip-color, #808080) 10%, transparent);
}

/* Locked chips in inference mode: always on, not toggleable */
.theory-chip.locked {
    cursor: default;
    opacity: 1 !important;
    border-style: solid !important;
}

/* =====================================================================
   Crosshair readout: floating panel that follows mouse over chart
   ===================================================================== */

.crosshair-readout {
    position: absolute;
    pointer-events: none;
    z-index: 20;
    background: rgba(26, 26, 26, 0.92);
    border: 1px solid #404040;
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 0.78em;
    line-height: 1.5;
    color: #e0e0e0;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.1s;
}

.crosshair-readout.visible {
    opacity: 1;
}

.crosshair-readout-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.crosshair-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.crosshair-label {
    color: #808080;
    min-width: 80px;
}

.crosshair-value {
    font-family: 'Consolas', 'Monaco', monospace;
    color: #e0e0e0;
}

/* =====================================================================
   Left Panel (parameter workbench)
   ===================================================================== */

.left-panel {
    width: 460px;
    background-color: #242424;
    padding: 20px;
    border-right: none;
    overflow-y: auto;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

/* Dark scrollbar styling */
.left-panel::-webkit-scrollbar {
    width: 12px;
}

.left-panel::-webkit-scrollbar-track {
    background: #1a1a1a;
}

.left-panel::-webkit-scrollbar-thumb {
    background: #333333;
    border-radius: 6px;
    border: 2px solid #1a1a1a;
}

.left-panel::-webkit-scrollbar-thumb:hover {
    background: #444444;
}

/* Firefox scrollbar */
.left-panel {
    scrollbar-width: thin;
    scrollbar-color: #333333 #1a1a1a;
}

.resize-handle {
    width: 4px;
    height: 100%;
    background: #404040;
    cursor: col-resize;
    z-index: 10;
    transition: background 0.2s;
    flex-shrink: 0;
}

.resize-handle:hover {
    background: #4da6ff;
}

.resize-handle.dragging {
    background: #4da6ff;
}

.right-panel {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

/* When showing observation data tab, the right panel scrolls like left/right panels */
.right-panel.obs-data-active {
    overflow-y: auto;
}

.right-panel.obs-data-active::-webkit-scrollbar {
    width: 12px;
}

.right-panel.obs-data-active::-webkit-scrollbar-track {
    background: #1a1a1a;
}

.right-panel.obs-data-active::-webkit-scrollbar-thumb {
    background: #333333;
    border-radius: 6px;
    border: 2px solid #1a1a1a;
}

.right-panel.obs-data-active::-webkit-scrollbar-thumb:hover {
    background: #444444;
}

/* =====================================================================
   Right Metrics Panel
   ===================================================================== */

.metrics-resize-handle {
    width: 4px;
    height: 100%;
    background: #404040;
    cursor: col-resize;
    z-index: 10;
    transition: background 0.2s;
    flex-shrink: 0;
}

.metrics-resize-handle:hover,
.metrics-resize-handle.dragging {
    background: #4da6ff;
}

.metrics-panel {
    width: 350px;
    background-color: #242424;
    padding: 14px 12px;
    overflow-y: auto;
    flex-shrink: 0;
    border-left: none;
    position: relative;
    display: flex;
    flex-direction: column;
}

.metrics-panel.collapsed {
    width: 20px !important;
    min-width: 20px !important;
    padding: 0;
    overflow: hidden;
}

.metrics-panel.collapsed .metrics-section {
    display: none;
}

.metrics-panel.collapsed .metrics-collapse-btn {
    width: 20px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.metrics-panel.collapsed .metrics-collapse-icon {
    transform: rotate(180deg);
}

.metrics-collapse-btn {
    position: absolute;
    top: 8px;
    left: 4px;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #606060;
    font-size: 0.6em;
    border-radius: 3px;
    transition: color 0.2s, background 0.2s;
    z-index: 2;
}

.metrics-collapse-btn:hover {
    color: #4da6ff;
    background: #333;
}

.metrics-collapse-icon {
    transition: transform 0.2s;
}

.metrics-panel::-webkit-scrollbar {
    width: 8px;
}
.metrics-panel::-webkit-scrollbar-track {
    background: #1a1a1a;
}
.metrics-panel::-webkit-scrollbar-thumb {
    background: #333333;
    border-radius: 4px;
}
.metrics-panel {
    scrollbar-width: thin;
    scrollbar-color: #333333 #1a1a1a;
}

.metrics-section {
    background-color: #2a2a2a;
    border: 1px solid #404040;
    border-radius: 6px;
    margin-bottom: 8px;
    overflow: hidden;
}

/* Split pane layout inside metrics panel */
.metrics-pane {
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #333333 #1a1a1a;
}

.metrics-pane-top {
    padding-top: 28px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #333333 #1a1a1a;
}

.metrics-pane-bottom {
    flex: 1;
    min-height: 0;
    padding-top: 4px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #333333 #1a1a1a;
}

.metrics-pane-bottom .metrics-section:first-child {
    margin-top: 0;
}

.metrics-pane-divider {
    height: 5px;
    background: #404040;
    cursor: row-resize;
    flex-shrink: 0;
    margin: 4px 0;
    border-radius: 3px;
    transition: background 0.2s;
}

.metrics-pane-divider:hover,
.metrics-pane-divider.dragging {
    background: #4da6ff;
}


.metrics-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.15s;
}

.metrics-header:hover {
    background-color: #333;
}

.metrics-header-text {
    color: #b0b0b0;
    font-size: 0.82em;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.metrics-chevron {
    color: #606060;
    font-size: 0.65em;
    transition: transform 0.2s;
}

.metrics-body {
    padding: 4px 12px 10px 12px;
}

.metrics-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 3px 0;
    border-bottom: 1px solid #333;
}

.metrics-row:last-child {
    border-bottom: none;
}

.metrics-label {
    color: #808080;
    font-size: 0.8em;
}

.metrics-value {
    color: #e0e0e0;
    font-size: 0.82em;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
    text-align: right;
}

.metrics-value-sm {
    font-size: 0.72em;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.metrics-value.good { color: #4caf50; }
.metrics-value.warn { color: #ff9800; }
.metrics-value.bad  { color: #ef5350; }

/* Fit comparison table */
.fit-compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.75em;
    font-variant-numeric: tabular-nums;
}

.fit-compare-table thead th {
    color: #808080;
    font-weight: 600;
    text-align: right;
    padding: 4px 5px;
    border-bottom: 1px solid #404040;
}

.fit-compare-table thead th:first-child {
    text-align: left;
}

.fit-compare-table tbody td {
    text-align: right;
    padding: 4px 5px;
    border-bottom: 1px solid #2f2f2f;
    font-weight: 500;
}

.fit-compare-table tbody td:first-child {
    text-align: left;
    font-weight: 600;
}

.fit-compare-table tbody td.fc-good { color: #4caf50; }
.fit-compare-table tbody td.fc-warn { color: #ff9800; }
.fit-compare-table tbody td.fc-bad  { color: #ef5350; }

.fit-compare-table .fc-swatch {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 5px;
    vertical-align: middle;
}

.fit-compare-table .fc-best td {
    font-weight: 700;
}

/* Residuals table */
.metrics-residuals-table-wrap {
    max-height: 260px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #333333 #1a1a1a;
}

.metrics-residuals-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.75em;
    font-variant-numeric: tabular-nums;
}

.metrics-residuals-table thead th {
    color: #808080;
    font-weight: 600;
    text-align: right;
    padding: 3px 5px;
    border-bottom: 1px solid #404040;
    position: sticky;
    top: 0;
    background: #2a2a2a;
}

.metrics-residuals-table thead th:first-child {
    text-align: left;
}

.metrics-residuals-table tbody td {
    color: #b0b0b0;
    text-align: right;
    padding: 2px 5px;
    border-bottom: 1px solid #2f2f2f;
}

.metrics-residuals-table tbody td:first-child {
    text-align: left;
}

.metrics-residuals-table tbody tr.sigma-good td { color: #4caf50; }
.metrics-residuals-table tbody tr.sigma-warn td { color: #ff9800; }
.metrics-residuals-table tbody tr.sigma-bad td  { color: #ef5350; }

h1 {
    font-size: 1.8em;
    margin-bottom: 5px;
    color: #4da6ff;
    font-weight: 600;
    letter-spacing: 0.5px;
}

h2 {
    font-size: 0.95em;
    margin-bottom: 8px;
    color: #808080;
    font-weight: normal;
}

.subtitle {
    font-size: 0.85em;
    margin-bottom: 25px;
    color: #999;
    font-weight: normal;
    font-style: italic;
}

/* Mode toggle wrapper (used in command bar now) */
.mode-toggle {
    margin-bottom: 15px;
    padding: 15px;
    background-color: #2a2a2a;
    border-radius: 8px;
    border: 1px solid #404040;
}

.mode-toggle-label {
    display: block;
    margin-bottom: 10px;
    color: #b0b0b0;
    font-size: 0.9em;
    font-weight: 500;
}

.mode-buttons {
    display: flex;
    gap: 10px;
}

.mode-button {
    flex: 1;
    padding: 10px;
    background-color: #333333;
    color: #b0b0b0;
    border: 1px solid #404040;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
    transition: all 0.2s;
}

.mode-button:hover {
    background-color: #3a3a3a;
}

.mode-button.active {
    background-color: #4da6ff;
    color: #ffffff;
    border-color: #4da6ff;
}

.examples-section {
    margin-bottom: 15px;
    background-color: #2a2a2a;
    border-radius: 8px;
    border: 1px solid #404040;
    overflow: hidden;
}

.examples-header {
    padding: 12px 15px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #2a2a2a;
    transition: background-color 0.2s;
}

.examples-header:hover {
    background-color: #303030;
}

.examples-header-text {
    color: #b0b0b0;
    font-size: 0.9em;
    font-weight: 500;
}

.examples-arrow {
    color: #4da6ff;
    font-size: 0.8em;
    transition: transform 0.2s;
}

.examples-arrow.expanded {
    transform: rotate(180deg);
}

.examples-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.examples-content.expanded {
    max-height: 280px;
}

.examples-dropdown-wrapper {
    padding: 15px;
}

.examples-dropdown {
    width: 100%;
    padding: 8px;
    background-color: #333333;
    color: #e0e0e0;
    border: 1px solid #404040;
    border-radius: 4px;
    font-size: 0.9em;
    cursor: pointer;
}

.examples-dropdown:hover {
    background-color: #3a3a3a;
}

.control-group {
    margin-bottom: 14px;
}

.control-label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 6px;
    color: #b0b0b0;
    font-size: 0.9em;
}

.control-label span:first-child {
    font-weight: 500;
}

.control-value {
    color: #4da6ff;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    background: #404040;
    outline: none;
    border-radius: 3px;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: #4da6ff;
    cursor: pointer;
    border-radius: 50%;
    transition: background 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: #66b3ff;
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: #4da6ff;
    cursor: pointer;
    border-radius: 50%;
    border: none;
    transition: background 0.2s;
}

input[type="range"]::-moz-range-thumb:hover {
    background: #66b3ff;
}

.chart-container {
    flex: 1;
    position: relative;
    background-color: #242424;
    border-radius: 8px;
    padding: 20px;
    border: 1px solid #404040;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chart-main-wrapper {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

.vps-panel {
    display: none !important;
    height: 0;
    overflow: hidden;
    flex-shrink: 0;
    border: none;
    margin: 0;
    padding: 0;
}

.vps-panel-label {
    font-size: 0.8em;
    font-weight: 500;
    color: #b0b0b0;
    margin-bottom: 4px;
}

.vps-chart-wrap {
    flex: 1;
    min-height: 0;
    position: relative;
}

.vps-chart-wrap canvas {
    max-width: 100%;
    max-height: 100%;
    display: block;
}

.chart-container canvas {
    max-height: 100%;
    max-width: 100%;
}

.chart-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(255,255,255,0.1);
    border-top-color: #4da6ff;
    border-radius: 50%;
    animation: chart-spin 0.8s linear infinite;
    margin: 0 auto;
}

@keyframes chart-spin {
    to { transform: rotate(360deg); }
}

/* Chart action button (Reset Zoom): floats top-left over the canvas,
   styled like the former Data Sources button. Only visible when zoomed. */
.chart-action-button {
    position: absolute;
    top: 8px;
    left: 8px;
    background: rgba(77, 166, 255, 0.12);
    color: #4da6ff;
    border: 1px solid rgba(77, 166, 255, 0.3);
    border-radius: 4px;
    padding: 5px 12px;
    font-size: 0.78em;
    font-weight: 500;
    letter-spacing: 0.3px;
    cursor: pointer;
    z-index: 10;
    transition: background 0.15s, border-color 0.15s;
}

.chart-action-button:hover {
    background: rgba(77, 166, 255, 0.25);
    border-color: rgba(77, 166, 255, 0.6);
}

@keyframes chart-spin {
    to { transform: rotate(360deg); }
}

.info-text {
    margin-top: 15px;
    padding: 10px;
    background-color: #2a2a2a;
    border-left: 3px solid #4da6ff;
    border-radius: 4px;
    font-size: 0.8em;
    line-height: 1.4;
    color: #b0b0b0;
}

.info-text strong {
    color: #e0e0e0;
}

.legend-item {
    display: flex;
    align-items: center;
    margin-bottom: 5px;
    font-size: 0.9em;
}

.legend-color {
    width: 30px;
    height: 3px;
    margin-right: 10px;
    border-radius: 2px;
}

.inference-result {
    margin-top: 15px;
    padding: 12px;
    background-color: #2a2a2a;
    border-left: 3px solid #4da6ff;
    border-radius: 4px;
    font-size: 0.85em;
    display: none;
}

.inference-result.visible {
    display: block;
}

.inference-result strong {
    color: #4da6ff;
}

/* Galaxy Browser Panel (matches .mass-model-section) */
.galaxy-browser {
    display: flex;
    flex-direction: column;
    margin-bottom: 14px;
    background-color: #2a2a2a;
    border-radius: 8px;
    border: 1px solid #404040;
    overflow: hidden;
    min-height: 0;
    flex: 1 1 0;
}

.galaxy-browser-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
}

.galaxy-browser-label {
    color: #b0b0b0;
    font-size: 0.9em;
    font-weight: 500;
}

.galaxy-browser-count {
    color: #808080;
    font-size: 0.8em;
    font-weight: 400;
}

.galaxy-browser-search-wrap {
    padding: 0 15px 10px;
}

.galaxy-search-input {
    width: 100%;
    padding: 8px 10px;
    font-size: 0.82em;
    font-family: inherit;
    border: 1px solid #404040;
    border-radius: 6px;
    background: #1e1e1e;
    color: #e0e0e0;
    outline: none;
    transition: border-color 0.15s;
    box-sizing: border-box;
}

.galaxy-search-input::placeholder {
    color: #606060;
}

.galaxy-search-input:focus {
    border-color: #4da6ff;
}

.galaxy-browser-list-wrap {
    flex: 1 1 0;
    overflow-y: auto;
    min-height: 0;
    padding: 0 8px 8px;
}

.galaxy-browser-list-wrap::-webkit-scrollbar {
    width: 6px;
}

.galaxy-browser-list-wrap::-webkit-scrollbar-track {
    background: transparent;
}

.galaxy-browser-list-wrap::-webkit-scrollbar-thumb {
    background: #404040;
    border-radius: 3px;
}

.galaxy-browser-list-wrap::-webkit-scrollbar-thumb:hover {
    background: #505050;
}

.galaxy-browser-list-wrap {
    scrollbar-width: thin;
    scrollbar-color: #404040 transparent;
}

.galaxy-browser-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.galaxy-browser-item {
    display: flex;
    align-items: center;
    padding: 7px 10px;
    margin: 0;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.82em;
    color: #b0b0b0;
    transition: background 0.12s, color 0.12s;
    user-select: none;
}

.galaxy-browser-item:hover {
    background: #1e1e1e;
    color: #e0e0e0;
}

.galaxy-browser-item.selected {
    background: #1e1e1e;
    color: #4da6ff;
    border-left: 3px solid #4da6ff;
    padding-left: 7px;
}

.galaxy-browser-item-id {
    flex: 0 0 auto;
    min-width: 90px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.92em;
    color: inherit;
    opacity: 0.6;
}

.galaxy-browser-item.selected .galaxy-browser-item-id {
    opacity: 1;
}

.galaxy-browser-item-name {
    flex: 1 1 auto;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.galaxy-browser-empty {
    padding: 20px 15px;
    text-align: center;
    color: #606060;
    font-size: 0.82em;
}

/* (Legacy observations-dropdown and add-observation-btn styles removed) */

/* (SPARC Import Overlay styles removed) */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Mass Distribution Panel */
.mass-model-section {
    margin-bottom: 14px;
    background-color: #2a2a2a;
    border-radius: 8px;
    border: 1px solid #404040;
    overflow: hidden;
}

.mass-model-header {
    padding: 12px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mass-model-header-text {
    color: #b0b0b0;
    font-size: 0.9em;
    font-weight: 500;
}

.reset-to-photometric-btn {
    padding: 4px 10px;
    font-size: 0.78em;
    font-weight: 500;
    color: #4da6ff;
    background: rgba(77, 166, 255, 0.12);
    border: 1px solid rgba(77, 166, 255, 0.5);
    border-radius: 6px;
    cursor: pointer;
    white-space: nowrap;
}
.reset-to-photometric-btn:hover {
    background: rgba(77, 166, 255, 0.2);
    border-color: #4da6ff;
}

/* View Mode Toggle: segmented control for Mass Model vs Observations */
.view-mode-toggle {
    display: flex;
    margin-bottom: 14px;
    background: #2a2a2a;
    border: 1px solid #404040;
    border-radius: 8px;
    overflow: hidden;
}

.view-mode-btn {
    flex: 1;
    padding: 10px 12px;
    background: transparent;
    color: #808080;
    border: none;
    font-size: 0.85em;
    font-weight: 500;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    position: relative;
}

.view-mode-btn.active {
    color: #e0e0e0;
    background: rgba(77, 166, 255, 0.12);
}

.view-mode-btn[data-mode="observations"].active {
    color: #00E5FF;
    background: rgba(0, 229, 255, 0.12);
}

.view-mode-btn:not(.active):hover {
    color: #b0b0b0;
    background: rgba(255, 255, 255, 0.04);
}

.view-mode-btn.loading {
    pointer-events: none;
    opacity: 0.6;
}

.view-mode-btn.loading::after {
    content: '';
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-left: 6px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: toggleSpin 0.6s linear infinite;
    vertical-align: middle;
}

@keyframes toggleSpin {
    to { transform: rotate(360deg); }
}

.command-btn {
    background: transparent;
    border: 1px solid #555;
    color: #555;
    font-size: 0.75em;
    padding: 3px 8px;
    border-radius: 3px;
    margin-left: 8px;
    cursor: not-allowed;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.mass-model-content {
    /* Always visible in prediction mode */
}

.mass-model-body {
    padding: 0 15px 15px 15px;
}

.mass-component {
    margin-bottom: 12px;
    padding: 10px;
    background-color: #1e1e1e;
    border-radius: 6px;
    border-left: 3px solid #404040;
}

.mass-component.bulge { border-left-color: #ff9966; }
.mass-component.disk  { border-left-color: #66ccff; }
.mass-component.gas   { border-left-color: #99ff99; }

.mass-component-title {
    font-size: 0.8em;
    font-weight: 600;
    color: #b0b0b0;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mass-component .control-label {
    margin-bottom: 4px;
    font-size: 0.82em;
}

.mass-component input[type="range"] {
    height: 4px;
    margin-bottom: 6px;
}

.mass-model-total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    background-color: #1e1e1e;
    border-radius: 6px;
    border: 1px solid #404040;
    font-size: 0.85em;
}

.mass-model-total-row span:first-child {
    color: #b0b0b0;
    font-weight: 500;
}

.mass-model-total-row .control-value {
    font-size: 0.95em;
}

/* Galactic radius slider: lime green accent to associate with GFD+ */
#galactic-radius-group .control-value {
    color: #76FF03;
}

/* Vortex strength slider: cyan accent to associate with GFD-sigma */
#vortex-strength-group .control-value {
    color: #00E5FF;
}

/* Auto button for vortex strength */
.auto-btn {
    background: transparent;
    border: 1px solid #00E5FF;
    color: #00E5FF;
    font-size: 0.65em;
    padding: 1px 6px;
    border-radius: 3px;
    cursor: pointer;
    margin-left: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    transition: background 0.2s, color 0.2s;
}

.auto-btn:hover {
    background: #00E5FF;
    color: #1a1a2e;
}

.auto-btn.active {
    background: #00E5FF;
    color: #1a1a2e;
}

/* Inference mode: mass sliders heavily dimmed (auto-computed output, not input) */
.mass-component input[type="range"]:disabled {
    opacity: 0.15;
    cursor: default;
    height: 2px;
    pointer-events: none;
}

.inference-label {
    color: #4da6ff;
    font-size: 0.7em;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-left: 6px;
}

/* =====================================================================
   DATA PROVENANCE CARD (in-place flip)
   Both faces share .card-face inside .chart-container (padding: 20px).
   Same container, same coordinate system, same button class.
   ===================================================================== */

/* Both faces fill the chart-container equally.
   chart-container is flex-column with padding:20px,
   so each face gets uniform 20px inset automatically. */
#chart-face,
#data-face {
    width: 100%;
    flex: 1 1 0;
    min-height: 0;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Data card styles removed: Data Sources is now in the Observation Data tab */

/* ================================================================
   RIGHT PANEL TOP-LEVEL TABS (Charts)
   ================================================================ */
.right-panel-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid #333;
    margin: -20px -20px 0 -20px;
    padding: 0 20px 0 0;
    flex-shrink: 0;
    background: #1a1a1a;
}

.right-panel-tab {
    padding: 12px 20px;
    background: transparent;
    color: #808080;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 0.9em;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}

.right-panel-tab:hover {
    color: #b0b0b0;
}

.right-panel-tab.active {
    color: #4da6ff;
    border-bottom-color: #4da6ff;
}

.right-panel-tab-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

/* Charts tab content: allow submenu bar to extend full panel width (overflow visible so negative margin isn't clipped) */
.right-panel-tab-content[data-tab-content="charts"] {
    overflow: visible;
}

/* Chart Data tab: content flows naturally, the right-panel scrolls */
.right-panel-tab-content[data-tab-content="chart-data"] {
    overflow: visible;
    flex: none;
}

/* ================================================================
   CHARTS SUBMENU (nav strip under Charts tab, not badges)
   + OBSERVATION DATA PANEL
   ================================================================ */
.obs-tab-bar {
    display: flex;
    gap: 0;
    background: #1a1a1a;
    border-bottom: 1px solid #333;
    padding: 0 12px;
    flex-shrink: 0;
    min-height: 40px;
    box-sizing: border-box;
}

/* Submenu: full-width bar; bottom line spans entire panel; first item aligns with "Charts" tab (20px) */
.obs-tab-bar.charts-tab-bar {
    margin: 0 -20px 0 -20px;
    padding: 0 20px 0 0;
    align-items: stretch;
    gap: 0;
    flex-wrap: wrap;
    min-height: 36px;
    margin-bottom: 20px;
    position: relative;
    border-bottom: 1px solid #404040;
}

.charts-tab-bar-label {
    color: #808080;
    font-size: 0.78em;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-right: 12px;
    align-self: center;
}

.obs-tab {
    padding: 12px 16px;
    background: transparent;
    color: #808080;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 0.85em;
    font-weight: 500;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}

.obs-tab:hover {
    color: #b0b0b0;
}

.obs-tab.active {
    color: #00E5FF;
    border-bottom-color: #00E5FF;
}

/* Charts submenu: tab-style nav (no pills). Distinct from series toggles below. */
.obs-tab-bar .chart-sub-tab {
    padding: 8px 16px;
    border-radius: 0;
    border: none;
    border-bottom: 2px solid transparent;
    background: transparent;
    color: #909090;
    font-size: 0.8125em;
    font-weight: 500;
    letter-spacing: 0.02em;
    margin-bottom: -1px;
    transition: color 0.15s, border-color 0.15s;
}

/* First submenu item: align text with parent "Charts" tab (same 20px left padding as .right-panel-tab) */
.obs-tab-bar.charts-tab-bar .chart-sub-tab:first-child {
    padding-left: 20px;
}

.obs-tab-bar .chart-sub-tab:hover {
    color: #c0c0c0;
}

.obs-tab-bar .chart-sub-tab.active {
    color: #4da6ff;
    border-bottom-color: #4da6ff;
    background: transparent;
}

/* Observation Data tab: markdown-preview style.
   No inner scroll; the right-panel itself scrolls when this overflows. */
.obs-data-face {
    /* Do NOT set flex:1/min-height:0/overflow here.
       The content flows naturally; the right-panel scrolls. */
    position: relative;
}

/* Vortex tab: Figure 1a / 1b and Smooth button */
.vortex-message {
    padding: 12px 16px;
    margin: 8px 0;
    background: #2a2a2a;
    border-radius: 6px;
    color: #b0b0b0;
    font-size: 0.9em;
}
.vortex-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0 12px 0;
}
.vortex-smooth-btn {
    background: #1e3a5f;
    border: 1px solid #2a4a7f;
    border-radius: 6px;
    color: #e0e0e0;
    font-size: 0.9em;
    font-weight: 500;
    padding: 8px 16px;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s;
}
.vortex-smooth-btn:hover {
    background: #2a4a7f;
    border-color: #4da6ff;
}
.vortex-toolbar-hint {
    color: #808080;
    font-size: 0.85em;
}
.vortex-charts {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.vortex-chart-block {
    background: #242424;
    border-radius: 8px;
    padding: 12px;
    border: 1px solid #333;
}
.vortex-chart-title {
    font-size: 0.9em;
    font-weight: 600;
    color: #b0b0b0;
    margin-bottom: 8px;
}
.vortex-chart-wrap {
    position: relative;
    height: 280px;
    width: 100%;
}
.vortex-chart-wrap canvas {
    max-width: 100%;
    max-height: 100%;
}

.vortex-chart-caption {
    margin-top: 14px;
    padding: 12px 0 0;
    border-top: 1px solid #333;
    font-size: 0.875rem;
    line-height: 1.55;
    color: #b0b0b0;
    max-width: 56em;
}

.vortex-chart-caption p {
    margin: 0;
}

/* Font size toolbar (A- / A+) in data and field analysis tabs */
.obs-font-toolbar {
    position: sticky;
    top: 0;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    padding: 8px 8px 4px 0;
}

.obs-font-btn {
    background: #1e1e1e;
    border: 1px solid #333;
    border-radius: 4px;
    color: #808080;
    font-size: 0.82em;
    font-weight: 600;
    width: 28px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s, color 0.12s;
    user-select: none;
}

.obs-font-btn:hover {
    background: #2a2a2a;
    border-color: #4da6ff;
    color: #e0e0e0;
}

.obs-data-content {
    /* 8px + 20px right-panel padding = 28px, aligned with tab text */
    padding: 20px 8px 40px 8px;
    color: #d0d0d0;
    font-size: 0.9em;
    line-height: 1.75;
}

.obs-data-content h2 {
    font-size: 1.15em;
    font-weight: 600;
    color: #e0e0e0;
    margin: 0 0 4px 0;
}

.obs-data-content .obs-summary {
    color: #808080;
    font-size: 0.88em;
    margin-bottom: 28px;
}

/* Source group: heading + table per data source */
.obs-source-group {
    margin-bottom: 28px;
}

.obs-source-group h3 {
    font-size: 0.92em;
    font-weight: 600;
    color: #00E5FF;
    margin: 0 0 2px 0;
}

.obs-source-group .obs-source-meta {
    color: #606060;
    font-size: 0.82em;
    margin-bottom: 10px;
}

/* Observation table within each source group */
.obs-data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88em;
    margin-bottom: 0;
}

.obs-data-table th {
    text-align: right;
    padding: 6px 12px;
    color: #606060;
    font-weight: 500;
    border-bottom: 1px solid #333;
    font-size: 0.82em;
    white-space: nowrap;
}

.obs-data-table th:first-child {
    text-align: left;
}

.obs-data-table td {
    text-align: right;
    padding: 5px 12px;
    color: #c0c0c0;
    border-bottom: 1px solid #2a2a2a;
    font-variant-numeric: tabular-nums;
}

.obs-data-table td:first-child {
    text-align: left;
    color: #4da6ff;
}

.obs-data-table tbody tr:hover {
    background: rgba(77, 166, 255, 0.05);
}

/* References section at bottom */
.obs-data-content .obs-refs-section {
    margin-top: 28px;
    padding-top: 16px;
    border-top: 1px solid #2a2a2a;
}

.obs-data-content .obs-refs-section h4 {
    color: #808080;
    font-size: 0.85em;
    font-weight: 500;
    margin: 0 0 8px 0;
}

.obs-data-content .obs-refs-section div {
    color: #505050;
    font-size: 0.8em;
    line-height: 1.8;
    padding-left: 12px;
}

/* ================================================================
   CHART DATA TAB — exportable data for all chart series
   Collapsible sections, Copy/Download CSV, Download all as JSON.
   ================================================================ */
.chart-data-toolbar {
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #252525;
}
.chart-data-export-btn {
    background: #2a2a2a;
    color: #b0b0b0;
    border: 1px solid #404040;
    padding: 6px 12px;
    font-size: 0.85em;
    border-radius: 4px;
    cursor: pointer;
}
.chart-data-export-btn:hover {
    background: #353535;
    color: #e0e0e0;
    border-color: #4da6ff;
}
.chart-data-section {
    margin-bottom: 12px;
    border: 1px solid #252525;
    border-radius: 6px;
    overflow: hidden;
}
.chart-data-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: #1e1e1e;
    color: #c0c0c0;
    font-weight: 600;
    font-size: 0.92em;
    cursor: pointer;
    user-select: none;
}
.chart-data-section-header:hover {
    background: #252525;
    color: #e0e0e0;
}
.chart-data-header-title {
    display: flex;
    align-items: center;
}
.chart-data-chevron {
    display: inline-block;
    margin-right: 8px;
    transition: transform 0.2s ease;
}
.chart-data-section-collapsed .chart-data-chevron {
    transform: rotate(-90deg);
}
.chart-data-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    cursor: default;
}
.chart-data-header-actions .chart-data-export-btn {
    margin: 0;
}
.chart-data-section-body {
    padding: 12px;
    background: #181818;
}
.chart-data-section-collapsed .chart-data-section-body {
    display: none;
}
.chart-data-empty {
    color: #606060;
    font-size: 0.9em;
    margin: 0;
}
.chart-data-kv td:first-child {
    color: #808080;
    font-weight: 500;
}

/* ================================================================
   FIELD ANALYSIS TAB — engineering classification report
   Collapsible sections, prioritised layout, report typography.
   ================================================================ */

/* Loading placeholder */
.fa-loading { color: #606060; font-size: 0.88em; }

/* --- Report Header --- */
.fa-report-header {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid #252525;
}
.fa-report-id {
    font-size: 0.68em;
    font-weight: 600;
    color: #4da6ff;
    letter-spacing: 1.5px;
    margin-bottom: 4px;
}
.fa-report-name {
    font-size: 1.3em;
    font-weight: 700;
    color: #e8e8e8;
    margin: 0;
    letter-spacing: 0.2px;
}

/* --- Collapsible Section --- */
.fa-section {
    margin-bottom: 4px;
    border: 1px solid #1e1e1e;
    border-radius: 4px;
    overflow: hidden;
}

.fa-section-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    cursor: pointer;
    user-select: none;
    background: #161616;
    transition: background 0.12s;
}
.fa-section-header:hover { background: #1a1a1a; }

.fa-section-header h3 {
    font-size: 0.78em;
    font-weight: 600;
    color: #a0a0a0;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}
.fa-collapsed .fa-section-header h3 { color: #606060; }

.fa-chevron {
    font-size: 0.65em;
    color: #505050;
    width: 10px;
    flex-shrink: 0;
    transition: color 0.12s;
}
.fa-section-header:hover .fa-chevron { color: #808080; }

.fa-section-body {
    padding: 12px 14px 16px 14px;
}

/* --- Prose --- */
.fa-prose {
    font-size: 0.84em;
    color: #858585;
    margin: 4px 0 6px 0;
    line-height: 1.55;
}

/* --- Block equation --- */
.fa-eq {
    margin: 6px 0 12px 10px;
    padding: 6px 0 6px 14px;
    border-left: 2px solid #252525;
    overflow-x: auto;
    min-height: 1.2em;
}
.fa-eq .katex {
    color: #d0d0d0;
    font-size: 1.05em;
}

/* --- Step labels (numbered items in Fitted Model / Theory) --- */
.fa-step-label {
    font-size: 0.8em;
    font-weight: 600;
    color: #4da6ff;
    margin: 16px 0 2px 0;
    letter-spacing: 0.15px;
}
.fa-step-label:first-child { margin-top: 4px; }
.fa-step-note {
    font-weight: 400;
    color: #555;
    font-size: 0.92em;
}

/* Constants block at bottom of Fitted Model */
.fa-constants-block {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid #1e1e1e;
}
.fa-constants-block .fa-eq {
    border-left-color: #1e1e1e;
    margin-bottom: 6px;
}
.fa-constants-block .fa-eq .katex {
    font-size: 0.88em;
    color: #707070;
}

/* --- Metrics table --- */
.fa-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.84em;
}

.fa-table td {
    padding: 5px 6px;
    vertical-align: middle;
}

.fa-table tr { border-bottom: 1px solid #1a1a1a; }
.fa-table tr:last-child { border-bottom: none; }
.fa-table tr:hover { background: rgba(255,255,255,0.02); }

.fa-table td.fa-label {
    color: #858585;
    width: 46%;
}

.fa-table td.fa-sym-cell {
    width: 12%;
    text-align: center;
}
.fa-table td.fa-sym-cell .katex {
    font-size: 0.88em;
    color: #606060;
}

.fa-table td.fa-value {
    color: #d0d0d0;
    text-align: right;
    font-family: 'Consolas', 'SF Mono', 'Menlo', monospace;
    font-size: 0.95em;
    white-space: nowrap;
}

/* ================================================================
   PROSE LAYOUT — academic / markdown-preview style
   Used by About and Field screens for flowing scientific text.
   ================================================================ */
.prose-screen {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    background: #141414;
    scrollbar-width: thin;
    scrollbar-color: #333333 #141414;
}
.prose-screen::-webkit-scrollbar { width: 12px; }
.prose-screen::-webkit-scrollbar-track { background: #141414; }
.prose-screen::-webkit-scrollbar-thumb { background: #333; border-radius: 6px; border: 2px solid #141414; }
.prose-screen::-webkit-scrollbar-thumb:hover { background: #444; }

.prose {
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 32px 80px 32px;
    font-family: 'Georgia', 'Times New Roman', 'Cambria', serif;
    font-size: 16px;
    line-height: 1.85;
    color: #c0c0c0;
}

.prose h1 {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 1.6em;
    font-weight: 600;
    color: #e8e8e8;
    letter-spacing: 0.3px;
    margin: 0 0 8px 0;
    padding-bottom: 10px;
    border-bottom: 1px solid #2a2a2a;
}

.prose .prose-subtitle {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 0.95em;
    color: #707070;
    font-style: italic;
    margin: 0 0 32px 0;
    line-height: 1.5;
}

.prose h2 {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 1.15em;
    font-weight: 600;
    color: #d0d0d0;
    margin: 36px 0 12px 0;
    padding-bottom: 6px;
    border-bottom: 1px solid #222;
}

.prose h3 {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 1em;
    font-weight: 600;
    color: #b0b0b0;
    margin: 28px 0 8px 0;
}

.prose p {
    margin: 0 0 16px 0;
    text-align: justify;
}

.prose p:last-child {
    margin-bottom: 0;
}

.prose strong {
    color: #e0e0e0;
    font-weight: 700;
}

.prose em {
    color: #b0b0b0;
    font-style: italic;
}

.prose a {
    color: #4da6ff;
    text-decoration: none;
}

.prose a:hover {
    text-decoration: underline;
}

.prose ul, .prose ol {
    margin: 0 0 16px 0;
    padding-left: 24px;
}

.prose li {
    margin: 4px 0;
}

.prose .eq {
    display: block;
    margin: 20px 0;
    padding: 14px 24px;
    background: #111;
    border: 1px solid #222;
    border-radius: 4px;
    text-align: center;
    font-size: 1.05em;
    color: #e0e0e0;
    letter-spacing: 0.5px;
}

.prose .cite {
    background: #111;
    border: 1px solid #222;
    border-radius: 4px;
    padding: 16px 20px;
    margin: 16px 0;
    font-size: 0.9em;
    color: #999;
    line-height: 1.8;
}

.prose .cite strong {
    color: #c0c0c0;
}

.prose .ref-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.prose .ref-list li {
    font-size: 0.9em;
    color: #888;
    line-height: 1.7;
    padding: 4px 0;
    border-bottom: 1px solid #1a1a1a;
}

.prose .ref-list li:last-child {
    border-bottom: none;
}

.prose .ref-list li em {
    color: #a0a0a0;
}

.prose hr {
    border: none;
    border-top: 1px solid #222;
    margin: 36px 0;
}

.prose .prose-footer {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    text-align: center;
    font-size: 0.82em;
    color: #444;
    margin-top: 48px;
    padding-top: 20px;
    border-top: 1px solid #222;
    letter-spacing: 0.3px;
}

/* ================================================================
   HOME DASHBOARD — card-based module launcher
   ================================================================ */
.home-screen {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    background: #141414;
    scrollbar-width: thin;
    scrollbar-color: #333333 #141414;
}
.home-screen::-webkit-scrollbar { width: 12px; }
.home-screen::-webkit-scrollbar-track { background: #141414; }
.home-screen::-webkit-scrollbar-thumb { background: #333; border-radius: 6px; border: 2px solid #141414; }
.home-screen::-webkit-scrollbar-thumb:hover { background: #444; }

.home-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 48px 32px 80px 32px;
}

.home-header {
    margin-bottom: 48px;
}

.home-title {
    font-size: 2.2em;
    font-weight: 700;
    color: #4da6ff;
    margin: 0 0 6px 0;
    letter-spacing: 1px;
}

.home-subtitle {
    font-size: 1.05em;
    color: #808080;
    font-weight: 400;
    margin: 0;
    letter-spacing: 0.3px;
}

/* Paper callout on home dashboard */
.home-callout {
    background: #111;
    border: 1px solid #2a2a2a;
    border-left: 3px solid #4da6ff;
    border-radius: 6px;
    padding: 20px 24px;
    margin-bottom: 40px;
}

.home-callout-label {
    font-size: 0.72em;
    font-weight: 600;
    color: #4da6ff;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 10px;
}

.home-callout-paper {
    font-size: 1.05em;
    font-weight: 600;
    color: #e0e0e0;
    line-height: 1.5;
    margin-bottom: 4px;
}

.home-callout-sub {
    font-size: 0.88em;
    font-style: italic;
    color: #888;
    margin-bottom: 14px;
}

.home-callout-note {
    font-size: 0.85em;
    color: #999;
    margin: 0;
    line-height: 1.6;
}

.home-callout-note strong {
    color: #c0c0c0;
}

.home-callout-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 14px;
    border: 1px solid var(--chip-color, #808080);
    background: color-mix(in srgb, var(--chip-color, #808080) 20%, transparent);
    color: var(--chip-color, #808080);
    font-size: 0.88em;
    font-weight: 600;
    letter-spacing: 0.3px;
    vertical-align: middle;
}

.home-section {
    margin-bottom: 40px;
}

.home-section-title {
    font-size: 0.8em;
    font-weight: 600;
    color: #b0b0b0;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin: 0 0 16px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid #2a2a2a;
    display: flex;
    align-items: center;
    gap: 10px;
}

.home-section-icon {
    width: 18px;
    height: 18px;
    opacity: 0.6;
}

.home-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.home-card {
    width: 150px;
    height: 150px;
    background: #1e1e1e;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 20px 12px;
    cursor: pointer;
    transition: border-color 0.2s, background-color 0.2s;
    text-decoration: none;
    position: relative;
}

.home-card:hover {
    border-color: #4da6ff;
    background: #242424;
}

.home-card-icon {
    width: 36px;
    height: 36px;
    opacity: 0.7;
}

.home-card:hover .home-card-icon {
    opacity: 1;
}

.home-card-title {
    font-size: 0.82em;
    font-weight: 500;
    color: #e0e0e0;
    text-align: center;
    line-height: 1.3;
}

.home-card.disabled {
    opacity: 0.4;
    cursor: default;
    pointer-events: none;
}

.home-card.disabled:hover {
    border-color: #2a2a2a;
    background: #1e1e1e;
}

.coming-soon-badge {
    position: absolute;
    bottom: 8px;
    right: 8px;
    font-size: 0.6em;
    color: #606060;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.home-card-live {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 8px;
    height: 8px;
    background: #4caf50;
    border-radius: 50%;
    box-shadow: 0 0 6px rgba(76, 175, 80, 0.6);
}

/* ================================================================
   ARCHITECTURE PAGE — enterprise documentation layout
   Uses prose-screen base with wider content area for diagrams.
   ================================================================ */
.arch-prose {
    max-width: 900px;
    margin: 0 auto;
    padding: 48px 32px 80px 32px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 15px;
    line-height: 1.75;
    color: #c0c0c0;
}

.arch-prose h1 {
    font-size: 1.6em;
    font-weight: 600;
    color: #e8e8e8;
    letter-spacing: 0.3px;
    margin: 0 0 6px 0;
    padding-bottom: 10px;
    border-bottom: 1px solid #2a2a2a;
}

.arch-prose .arch-subtitle {
    font-size: 0.92em;
    color: #707070;
    margin: 0 0 36px 0;
    line-height: 1.5;
}

.arch-prose h2 {
    font-size: 1.12em;
    font-weight: 600;
    color: #d0d0d0;
    margin: 40px 0 12px 0;
    padding-bottom: 6px;
    border-bottom: 1px solid #222;
}

.arch-prose h3 {
    font-size: 0.98em;
    font-weight: 600;
    color: #b0b0b0;
    margin: 28px 0 8px 0;
}

.arch-prose p {
    margin: 0 0 14px 0;
}

.arch-prose strong {
    color: #e0e0e0;
    font-weight: 600;
}

.arch-prose code {
    font-family: 'Cascadia Code', 'Consolas', 'Courier New', monospace;
    font-size: 0.88em;
    background: #1a1a1a;
    border: 1px solid #2a2a2a;
    border-radius: 3px;
    padding: 1px 5px;
    color: #4da6ff;
}

/* Mermaid diagram container */
.arch-diagram {
    background: transparent;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    padding: 24px 16px;
    margin: 20px 0 28px 0;
    overflow-x: auto;
    text-align: center;
}

/* Callout cards for key concepts */
.arch-callout {
    background: #1e1e1e;
    border: 1px solid #2a2a2a;
    border-left: 3px solid #4da6ff;
    border-radius: 4px;
    padding: 16px 20px;
    margin: 16px 0;
}

.arch-callout-title {
    font-size: 0.82em;
    font-weight: 600;
    color: #4da6ff;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0 0 8px 0;
}

.arch-callout p {
    margin: 0;
    font-size: 0.92em;
    color: #b0b0b0;
    line-height: 1.6;
}

/* Pipeline step visualization */
.arch-pipeline {
    display: flex;
    align-items: center;
    gap: 0;
    margin: 20px 0 28px 0;
    flex-wrap: wrap;
    justify-content: center;
}

.arch-pipeline-step {
    background: #1e1e1e;
    border: 1px solid #2a2a2a;
    border-radius: 6px;
    padding: 12px 16px;
    text-align: center;
    min-width: 110px;
}

.arch-pipeline-step-label {
    font-size: 0.72em;
    color: #707070;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 0 4px 0;
}

.arch-pipeline-step-name {
    font-size: 0.88em;
    font-weight: 600;
    color: #e0e0e0;
}

.arch-pipeline-arrow {
    font-size: 1.2em;
    color: #404040;
    padding: 0 6px;
}

/* Table for service registry listing */
.arch-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0 24px 0;
    font-size: 0.88em;
}

.arch-table th {
    text-align: left;
    font-weight: 600;
    color: #909090;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.78em;
    padding: 8px 12px;
    border-bottom: 1px solid #2a2a2a;
}

.arch-table td {
    padding: 8px 12px;
    border-bottom: 1px solid #1e1e1e;
    color: #b0b0b0;
}

.arch-table td:first-child {
    color: #e0e0e0;
    font-weight: 500;
}

.arch-status-live {
    color: #4caf50;
    font-weight: 600;
}

.arch-status-soon {
    color: #606060;
}

/* =================================================================
   DOCUMENT VIEWER (reusable: GravisDoc module)
   ================================================================= */

.doc-viewer {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
    background: #141414;
    border-radius: 8px;
    overflow: hidden;
}

/* Tab bar */
.doc-tab-bar {
    display: flex;
    align-items: center;
    background: #141414;
    padding: 0;
    height: 40px;
    flex-shrink: 0;
}

.doc-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 14px;
    height: 100%;
    background: #141414;
    border-left: 3px solid #4da6ff;
    font-size: 0.92em;
    color: #d0d0d0;
    cursor: default;
    user-select: none;
}

.doc-tab-icon {
    color: #4da6ff;
    font-size: 0.85em;
}

.doc-tab-name {
    color: #d0d0d0;
    font-size: 0.92em;
}

.doc-tab-close {
    background: none;
    border: none;
    color: #606060;
    font-size: 1.2em;
    line-height: 1;
    padding: 2px 4px;
    margin-left: 8px;
    cursor: pointer;
    border-radius: 3px;
    transition: background 0.15s, color 0.15s;
}

.doc-tab-close:hover {
    background: #3a3a3a;
    color: #e0e0e0;
}

/* Font size toolbar (floats top-right inside doc-content) */
.doc-font-toolbar {
    position: sticky;
    top: 0;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    padding: 8px 0 4px 0;
    background: linear-gradient(to bottom, #141414 60%, transparent);
}

.doc-font-btn {
    background: #1e1e1e;
    border: 1px solid #333;
    border-radius: 4px;
    color: #808080;
    font-size: 0.82em;
    font-weight: 600;
    width: 28px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s, color 0.12s;
    user-select: none;
}

.doc-font-btn:hover {
    background: #2a2a2a;
    border-color: #4da6ff;
    color: #e0e0e0;
}

/* Scrollable document content (scroll wrapper) */
.doc-content {
    flex: 1;
    overflow-y: auto;
    padding: 0 36px 28px 36px;
    color: #d0d0d0;
    line-height: 1.75;
}

/* Rendered markdown body */
.doc-body {
    font-size: 0.92em;
}

/* Markdown rendered styles */
.doc-body h1 {
    color: #e8e8e8;
    font-size: 1.6em;
    font-weight: 600;
    margin: 0 0 16px 0;
    padding-bottom: 10px;
    border-bottom: 1px solid #2a2a2a;
}

.doc-body h2 {
    color: #e0e0e0;
    font-size: 1.2em;
    font-weight: 600;
    margin: 28px 0 10px 0;
}

.doc-body h3 {
    color: #c0c0c0;
    font-size: 1.05em;
    font-weight: 600;
    margin: 22px 0 8px 0;
}

.doc-body p {
    margin: 0 0 12px 0;
    color: #b8b8b8;
}

.doc-body strong {
    color: #e0e0e0;
    font-weight: 600;
}

.doc-body code {
    background: #1e1e1e;
    border: 1px solid #333;
    border-radius: 3px;
    padding: 1px 5px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 0.9em;
    color: #4da6ff;
}

.doc-body pre {
    background: #1a1a1a;
    border: 1px solid #2a2a2a;
    border-radius: 6px;
    padding: 14px 18px;
    overflow-x: auto;
    margin: 12px 0;
}

.doc-body pre code {
    background: none;
    border: none;
    padding: 0;
    color: #d0d0d0;
}

.doc-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
    font-size: 0.92em;
}

.doc-body th {
    text-align: left;
    padding: 8px 12px;
    background: #1a1a1a;
    border-bottom: 1px solid #333;
    color: #a0a0a0;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85em;
    letter-spacing: 0.3px;
}

.doc-body td {
    padding: 8px 12px;
    border-bottom: 1px solid #1e1e1e;
    color: #b8b8b8;
}

.doc-body ul, .doc-body ol {
    margin: 8px 0 12px 0;
    padding-left: 24px;
    color: #b8b8b8;
}

.doc-body li {
    margin: 4px 0;
}

.doc-body blockquote {
    border-left: 3px solid #4da6ff;
    margin: 12px 0;
    padding: 8px 16px;
    background: rgba(77, 166, 255, 0.05);
    color: #a0a0a0;
}

.doc-body blockquote a {
    color: #4da6ff;
    border-bottom-color: rgba(77, 166, 255, 0.25);
}

.doc-body a {
    color: #4da6ff;
    text-decoration: none;
    border-bottom: 1px solid rgba(77, 166, 255, 0.3);
    transition: color 0.12s, border-color 0.12s;
}

.doc-body a:hover {
    color: #7dc0ff;
    border-bottom-color: #7dc0ff;
}

.doc-body a:visited {
    color: #4da6ff;
}

.doc-body hr {
    border: none;
    border-top: 1px solid #2a2a2a;
    margin: 20px 0;
}

/* Loading / error states */
.doc-loading {
    color: #808080;
    font-style: italic;
    padding: 40px 0;
    text-align: center;
}

.doc-error {
    color: #ef5350;
    padding: 24px;
    background: rgba(239, 83, 80, 0.08);
    border: 1px solid rgba(239, 83, 80, 0.2);
    border-radius: 6px;
    margin: 20px;
}

/* Scrollbar for doc content */
.doc-content::-webkit-scrollbar {
    width: 8px;
}

.doc-content::-webkit-scrollbar-track {
    background: #141414;
}

.doc-content::-webkit-scrollbar-thumb {
    background: #333;
    border-radius: 4px;
}

.doc-content::-webkit-scrollbar-thumb:hover {
    background: #444;
}

/* Document list (left panel file selector) */
.doc-list-section {
    margin-bottom: 16px;
    background: #1a1a1a;
    border: 1px solid #2a2a2a;
    border-radius: 6px;
    overflow: hidden;
}

.doc-list-header {
    padding: 8px 12px;
    font-size: 0.78em;
    font-weight: 600;
    color: #707070;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid #2a2a2a;
}

.doc-list {
    list-style: none;
    margin: 0;
    padding: 4px 0;
}

.doc-list-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    cursor: pointer;
    color: #d0d0d0;
    font-size: 0.92em;
    transition: background 0.12s;
    border-left: 3px solid transparent;
}

.doc-list-item:hover {
    background: #242424;
    border-left-color: #4da6ff;
}

.doc-list-icon {
    color: #4da6ff;
    font-size: 0.85em;
    flex-shrink: 0;
}

.doc-list-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Open-document trigger button (reusable, place anywhere) */
.doc-open-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    width: 100%;
    justify-content: center;
    padding: 6px 14px;
    background: #1e1e1e;
    border: 1px solid #333;
    border-radius: 4px;
    color: #4da6ff;
    font-size: 0.82em;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

.doc-open-btn:hover {
    background: #2a2a2a;
    border-color: #4da6ff;
}

/* ================================================================
   Framework page
   ================================================================ */
.framework-screen {
    display: flex;
    flex: 1;
    height: 100%;
    min-height: 0;
}

.framework-body {
    width: 100%;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.framework-mobile-nav-backdrop {
    display: none;
}

.framework-left-panel {
    width: 380px;
    padding: 20px 20px 20px 30px;
    overflow-y: scroll;
    scrollbar-gutter: stable;
}

.framework-sidebar-header {
    margin-bottom: 14px;
}

.framework-sidebar-title {
    font-size: 1.15em;
    color: #e0e0e0;
    margin: 0;
}

.framework-mobile-nav-close {
    display: none;
}

.framework-sidebar-subtitle {
    margin-top: 5px;
    color: #808080;
    font-size: 0.85em;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

.framework-essentials {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    overflow: visible;
}

.framework-nav-accordion {
    display: block;
}

.framework-nav-accordion-item {
    margin: 0;
}

.framework-nav-accordion-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: transparent;
    border: none;
    border-bottom: 1px solid #343434;
    border-radius: 0;
    color: #7f96bb;
    font-size: 0.86em;
    font-weight: 600;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    padding: 11px 16px;
    margin: 0;
    cursor: pointer;
    transition: color 0.15s;
}

.framework-nav-accordion-toggle:hover {
    color: #a6c2e8;
}

.framework-nav-accordion-chevron {
    color: #6f7c96;
    font-size: 1em;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    transition: transform 0.15s ease, color 0.15s ease;
}

.framework-nav-accordion-chevron svg {
    width: 16px;
    height: 16px;
    display: block;
}

.framework-nav-accordion-item.open .framework-nav-accordion-chevron {
    transform: rotate(180deg);
    color: #8fc0ff;
}

.framework-nav-accordion-panel {
    padding: 12px 16px 2px 16px;
}

.framework-nav-accordion-item.open .framework-nav-accordion-toggle {
    color: #8fc0ff;
}

.framework-nav-group {
    margin: 0 0 22px 0;
    padding: 0;
}

.framework-nav-group:last-child {
    margin-bottom: 8px;
}

.framework-nav-heading {
    color: #f0f0f0;
    font-size: 0.92em;
    font-weight: 600;
    margin: 0 0 10px 0;
}

.framework-nav-heading-suffix {
    font-style: italic;
    font-weight: 400;
    color: #9aa8c4;
}

.framework-nav-link {
    display: block;
    color: #a8a8a8;
    text-decoration: none;
    font-size: 0.9em;
    line-height: 1.45;
    padding: 5px 0;
    transition: color 0.12s;
}

.framework-nav-link.is-nav-hidden {
    display: none;
}

.framework-nav-link:hover {
    color: #e0e0e0;
}

.framework-nav-link.active {
    color: #00E5A0;
    font-weight: 600;
}

.framework-nav-divider {
    height: 1px;
    background: #343434;
    margin: 6px 0 10px 0;
}

.framework-nav-section-label {
    color: #7f90b0;
    font-size: 0.78em;
    font-weight: 700;
    letter-spacing: 0.8px;
    margin: 0 0 14px 0;
}

.framework-right-panel {
    padding-left: 32px;
    overflow-y: scroll;
    scrollbar-gutter: stable;
    scrollbar-width: thin;
    scrollbar-color: #333333 #1a1a1a;
}

.framework-right-panel::-webkit-scrollbar {
    width: 12px;
}

.framework-right-panel::-webkit-scrollbar-track {
    background: #1a1a1a;
}

.framework-right-panel::-webkit-scrollbar-thumb {
    background: #333333;
    border-radius: 6px;
    border: 2px solid #1a1a1a;
}

.framework-right-panel::-webkit-scrollbar-thumb:hover {
    background: #444444;
}

.framework-content-card {
    max-width: 1280px;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
}

.framework-title {
    margin: 0;
}

.framework-subtitle {
    margin: 8px 0 18px 0;
    color: #9a9a9a;
    line-height: 1.55;
}

.framework-body-text {
    color: #c0c0c0;
    line-height: 1.65;
    margin: 0;
}

.framework-markdown {
    color: #cfcfcf;
    line-height: 1.72;
}

.framework-markdown h1,
.framework-markdown h2,
.framework-markdown h3 {
    color: #e8e8e8;
    line-height: 1.35;
}

.framework-markdown h1 {
    margin: 0 0 16px 0;
    display: none;
}

.framework-markdown h2 {
    margin: 32px 0 14px 0;
    padding-top: 22px;
    border-top: 1px solid #333;
    font-size: 1.35em;
    font-weight: 600;
}

.framework-markdown h2:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.framework-markdown h1 + h2 {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.framework-markdown h3 {
    margin: 24px 0 12px 0;
    font-size: 1.08em;
    font-weight: 600;
}

.framework-markdown p,
.framework-markdown ul,
.framework-markdown ol {
    margin: 0 0 16px 0;
}

.framework-markdown ul,
.framework-markdown ol {
    padding-left: 40px !important;
}

.framework-markdown li {
    margin-bottom: 14px;
    padding-left: 8px;
}

.framework-markdown li:last-child {
    margin-bottom: 0;
}

.framework-markdown img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 12px 0 18px 0;
}

.figure-viewer {
    position: relative;
    margin: 12px 0 18px 0;
}

.figure-viewer img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 0;
    border-radius: 6px;
}

.figure-viewer-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    padding: 8px 16px;
    background: transparent;
    color: #8bb4d9;
    border: 1px solid #333;
    border-radius: 4px;
    font-size: 0.85em;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

.figure-viewer-toggle:hover {
    background: rgba(139, 180, 217, 0.08);
    border-color: #556;
}

.figure-viewer-toggle .figure-viewer-icon {
    display: inline-block;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 5px 0 5px 8px;
    border-color: transparent transparent transparent #8bb4d9;
    transition: transform 0.2s;
}

.figure-viewer-toggle.active .figure-viewer-icon {
    border-width: 8px 5px 0 5px;
    border-color: #8bb4d9 transparent transparent transparent;
}

.figure-viewer-iframe-wrap {
    display: none;
    margin-top: 10px;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid #333;
    background: #0a0a0a;
}

.figure-viewer-iframe-wrap.open {
    display: block;
}

.figure-viewer-iframe {
    display: block;
    width: 100%;
    height: 560px;
    border: none;
    background: #0a0a0a;
}

.framework-markdown hr {
    border: none;
    border-top: 1px solid #333;
    margin: 24px 0;
}

.framework-markdown pre {
    background: #1b1b1b;
    border: 1px solid #333;
    border-radius: 6px;
    padding: 12px;
    overflow-x: auto;
}

.framework-markdown code {
    font-family: Consolas, Monaco, "Courier New", monospace;
    font-size: 0.92em;
}

.framework-markdown table {
    width: 100%;
    border-collapse: collapse;
    margin: 8px 0 16px 0;
    font-size: 0.92em;
}

.framework-markdown thead th {
    text-align: left;
    color: #e6e6e6;
    font-weight: 600;
    border-bottom: 1px solid #3a3a3a;
    padding: 8px 10px;
}

.framework-markdown tbody td {
    color: #c8c8c8;
    border-bottom: 1px solid #2f2f2f;
    padding: 8px 10px;
    vertical-align: top;
}

.framework-markdown tbody tr:last-child td {
    border-bottom: 1px solid #3a3a3a;
}

.api-demo-meta-table {
    width: auto;
    max-width: 100%;
}

.api-demo-meta-table thead th {
    white-space: nowrap;
    font-size: 0.8em;
    color: #999;
    font-weight: 500;
    text-transform: none;
}

.api-demo-meta-table tbody td {
    font-family: Consolas, Monaco, "Courier New", monospace;
    font-size: 0.88em;
    white-space: nowrap;
}

.api-demo-data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
}

.api-demo-data-table thead th {
    position: sticky;
    top: 0;
    background: #1e1e1e;
    z-index: 1;
    white-space: nowrap;
    font-size: 0.82em;
    padding: 6px 10px;
}

.api-demo-data-table tbody td {
    padding: 4px 10px;
}

.api-demo-data-table tbody tr:hover td {
    background: rgba(255,255,255,0.03);
}

.api-demo-data-scroll::-webkit-scrollbar {
    width: 6px;
}

.api-demo-data-scroll::-webkit-scrollbar-track {
    background: #1a1a1a;
}

.api-demo-data-scroll::-webkit-scrollbar-thumb {
    background: #444;
    border-radius: 3px;
}

.rc-explorer {
    margin: 24px 0;
}

.rc-controls {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.rc-select-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.rc-label {
    color: #aaa;
    font-size: 0.88rem;
    font-weight: 500;
    white-space: nowrap;
}

.rc-galaxy-select {
    background: #1e1e1e;
    color: #e0e0e0;
    border: 1px solid #3a3a3a;
    border-radius: 6px;
    padding: 7px 12px;
    font-size: 0.88rem;
    font-family: Consolas, Monaco, "Courier New", monospace;
    min-width: 280px;
    cursor: pointer;
    outline: none;
    transition: border-color 0.15s;
}

.rc-galaxy-select:hover {
    border-color: #555;
}

.rc-galaxy-select:focus {
    border-color: #00ff9d;
}

.rc-galaxy-select:disabled {
    opacity: 0.5;
    cursor: wait;
}

.rc-chart-area {
    background: rgba(0,0,0,0.15);
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    padding: 16px 16px 12px 16px;
}

.framework-main-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid #3a3a3a;
    margin: 16px 0 24px 0;
}

.framework-main-tab {
    padding: 10px 20px;
    background: transparent;
    color: #8e8e8e;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 0.85em;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}

.framework-main-tab:hover {
    color: #c0c0c0;
}

.framework-main-tab.active {
    color: #4da6ff;
    border-bottom-color: #4da6ff;
}

.framework-main-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 30px;
    align-items: start;
}

.framework-main-content {
    min-width: 0;
}

.framework-doc-section {
    padding: 0 0 26px 0;
    border-bottom: 1px solid #343434;
    margin-bottom: 26px;
}

.framework-doc-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.framework-doc-section h2 {
    color: #e8e8e8;
    font-size: 1.2em;
    margin: 0 0 12px 0;
    line-height: 1.35;
}

.framework-toc {
    position: sticky;
    top: 14px;
    align-self: start;
    background: transparent;
    border: none;
    border-left: 1px solid #343434;
    border-radius: 0;
    padding: 0 0 0 14px;
}

.framework-toc-title {
    color: #d8d8d8;
    font-size: 0.82em;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin: 0 0 8px 0;
}

.framework-toc-link {
    display: block;
    color: #9a9a9a;
    text-decoration: none;
    font-size: 0.82em;
    line-height: 1.45;
    padding: 4px 0;
}

.framework-toc-link:hover {
    color: #4da6ff;
}

.framework-toc-link.active {
    color: #4da6ff;
    font-weight: 600;
}

@media (max-width: 1200px) {
    .framework-main-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .framework-toc {
        position: static;
    }
}

@media (max-width: 980px) {
    body.framework-page .nav-mobile-toggle {
        display: inline-flex;
        margin-left: 6px;
    }

    .framework-mobile-nav-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.55);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.18s ease;
        z-index: 1100;
    }

    body.framework-nav-open {
        overflow: hidden;
    }

    body.framework-nav-open .framework-mobile-nav-backdrop {
        opacity: 1;
        pointer-events: auto;
    }

    .framework-left-panel {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        width: min(88vw, 380px) !important;
        max-width: min(88vw, 380px);
        padding: 16px 18px 20px 20px;
        transform: translateX(-100%);
        transition: transform 0.2s ease;
        z-index: 1200;
        background: #242424;
    }

    body.framework-nav-open .framework-left-panel {
        transform: translateX(0);
    }

    .framework-mobile-nav-close {
        display: inline-flex;
        float: right;
        margin: 0 0 10px 0;
    }

    .framework-sidebar-title {
        clear: both;
    }

    .resize-handle {
        display: none;
    }

    .framework-right-panel {
        padding: 14px 12px 16px 12px;
    }

    .framework-toc {
        display: none;
    }

    .nav-bar {
        padding: 0 12px;
        gap: 10px;
    }

    .nav-logo {
        font-size: 16px;
        margin-right: 10px;
        letter-spacing: 0.3px;
    }

    .nav-items {
        gap: 6px;
        min-width: 0;
    }

    .nav-item {
        padding: 7px 12px;
        font-size: 12px;
    }

    .nav-utility {
        gap: 8px;
    }

    .nav-version {
        font-size: 11px;
    }

    .nav-github span {
        display: none;
    }

    .nav-github {
        gap: 0;
    }

    body.framework-page .nav-mobile-toggle {
        order: 3;
    }
}