/* ============================================================
   3D Arena — Design tokens
   ============================================================ */
:root {
    /* Surfaces — near-black, slightly warm so gold sits naturally on top */
    --bg-base: #08080a;
    --bg-elevated: #101013;
    --surface: #16161a;
    --surface-2: #1e1e23;
    --surface-hover: #26262d;
    /* ~3:1 non-text contrast on surfaces for --border-strong (WCAG 1.4.11) */
    --border: rgba(212, 175, 55, 0.22);
    --border-strong: rgba(212, 175, 55, 0.5);

    /* Text */
    --text: #f5f3ee;
    --text-muted: #a8a49a;
    --text-subtle: #8f8b82; /* >=4.5:1 on --surface (WCAG AA small text) */

    /* Accent (gold) */
    --accent: #d4af37;
    --accent-hover: #e8c65c;
    --accent-2: #f4dc9a;
    --accent-contrast: #16130a;
    --accent-soft: rgba(212, 175, 55, 0.14);
    --accent-gradient: linear-gradient(135deg, #b8860b 0%, #d4af37 45%, #f4dc9a 100%);
    --focus-ring: 0 0 0 3px var(--accent-hover);
    --glow: 0 0 0 1px rgba(212, 175, 55, 0.35), 0 14px 45px -12px rgba(212, 175, 55, 0.35);

    /* Feedback */
    --warn: #ff8a4c;
    --warn-strong: #ff6b35;
    --error: #ff5d6c;

    /* Radii */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-full: 999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 10px 28px -10px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 24px 60px -16px rgba(0, 0, 0, 0.75);

    /* Motion */
    --transition: 180ms cubic-bezier(0.2, 0.7, 0.2, 1);

    /* Type */
    --font-body: "Inter", "Roboto", system-ui, sans-serif;
    --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
    --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

/* ============================================================
   Base
   ============================================================ */
html,
body {
    font-family: var(--font-body);
    background-color: var(--bg-base);
    background-image:
        radial-gradient(1100px 600px at 12% -8%, rgba(212, 175, 55, 0.13), transparent 60%),
        radial-gradient(900px 520px at 100% 0%, rgba(184, 134, 11, 0.1), transparent 55%);
    background-attachment: fixed;
    color: var(--text);
    margin: 0;
    padding: 0;
    width: 100%;
    overflow: auto;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* Users whose OS requests increased contrast get a boosted variant of the
   same palette: pure black/white poles, opaque borders, brighter gold. */
@media (prefers-contrast: more) {
    :root {
        --bg-base: #000000;
        --bg-elevated: #0a0a0c;
        --surface: #101012;
        --surface-2: #1a1a1e;
        --surface-hover: #26262d;
        --border: rgba(212, 175, 55, 0.55);
        --border-strong: rgba(232, 198, 92, 0.9);
        --text: #ffffff;
        --text-muted: #d6d2c8;
        --text-subtle: #b5b1a7;
        --accent: #ffd54a;
        --accent-hover: #ffe082;
        --accent-2: #ffecb0;
        --accent-soft: rgba(255, 213, 74, 0.2);
        --focus-ring: 0 0 0 3px #ffe082;
    }

    html,
    body {
        /* Drop the decorative gold radial washes */
        background-image: none;
    }
}

::selection {
    background: rgba(212, 175, 55, 0.35);
    color: #fff;
}

a {
    color: var(--accent-hover);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--text);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: var(--accent);
}

:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: var(--radius-sm);
}

/* ============================================================
   Banner / brand
   ============================================================ */
.banner {
    position: relative;
    width: 100%;
    padding: 26px 24px 22px;
    margin: 0 0 6px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-sizing: border-box;
    cursor: pointer;
    overflow: hidden;
    background:
        linear-gradient(135deg, rgba(212, 175, 55, 0.16), rgba(184, 134, 11, 0.06)),
        var(--surface);
    box-shadow: var(--shadow-md);
}

.banner::after {
    content: "";
    position: absolute;
    top: -60%;
    right: -10%;
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.3), transparent 70%);
    filter: blur(10px);
    pointer-events: none;
}

.banner h1 {
    position: relative;
    font-family: var(--font-display);
    font-size: clamp(28px, 6vw, 40px);
    font-weight: 700;
    letter-spacing: -0.02em;
    padding: 0;
    margin: 0;
    background: linear-gradient(120deg, #fffdf5 0%, #f4dc9a 55%, #d4af37 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    cursor: pointer;
}

.banner p {
    position: relative;
    padding: 0;
    margin: 6px 0 0 0;
    color: var(--text-muted);
    font-size: 15px;
    cursor: pointer;
}

/* ============================================================
   Text utilities
   ============================================================ */
.muted {
    color: var(--text-muted);
}

.emphasis {
    color: var(--text);
    font-weight: 600;
}

.error-text {
    color: var(--error);
}

.vote-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 40px 0;
}

.vote-error-action {
    width: 200px;
    max-width: 60%;
}

.center-title {
    text-align: center;
    display: block;
    margin: 0 auto;
    padding-top: 10px;
    font-family: var(--font-display);
    letter-spacing: -0.01em;
}

.center-subtitle {
    text-align: center;
    display: block;
    margin: 0 auto;
    padding: 8px 10px 20px;
    color: var(--text-muted);
}

/* ============================================================
   Loading states
   ============================================================ */
.loading-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 196px;
    gap: 12px;
}

.loading-icon {
    width: 32px;
    height: 32px;
    animation: spin 0.6s linear infinite;
    color: var(--accent-hover);
}

.loading-text {
    color: var(--text-muted);
    margin-top: 2px;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ============================================================
   App container
   ============================================================ */
.container {
    display: flex;
    flex-direction: column;
    margin-left: auto;
    margin-right: auto;
    padding: 16px;
    gap: 4px;
    min-height: 1200px;
    position: relative;
    box-sizing: border-box;

    @media (min-width: 576px) {
        max-width: 340px;
    }

    @media (min-width: 768px) {
        max-width: 500px;
    }

    @media (min-width: 992px) {
        max-width: 620px;
    }

    @media (min-width: 1200px) {
        max-width: 820px;
    }
}

.pre-wrapper {
    overflow-x: auto;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.pre-wrapper pre {
    margin: 0;
    padding: 16px;
}

.pre-wrapper code {
    font-family: var(--font-mono);
    font-size: 12.5px;
    line-height: 1.6;
    color: var(--text-muted);
}

/* ============================================================
   3D canvas stage
   ============================================================ */
.canvas-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background: #05060a;
    box-shadow: var(--shadow-md);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.canvas-container:hover {
    border-color: var(--border-strong);
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-elevated);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    gap: 14px;
}

.loading-overlay::before {
    content: "Loading";
    color: var(--text-muted);
    font-size: 14px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.vote-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(8, 9, 14, 0);
    color: rgba(255, 255, 255, 0);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 110;
    transition: background-color 0.15s ease, color 0.15s ease;
    pointer-events: none;
    user-select: none;
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    padding: 0 12px;
    box-sizing: border-box;
}

.vote-overlay.show {
    background-color: rgba(8, 9, 14, 0.92);
    color: rgba(255, 255, 255, 1);
}

.loading-bar {
    position: relative;
    width: 256px;
    max-width: 62%;
    height: 8px;
    border-radius: var(--radius-full);
    background-color: rgba(255, 255, 255, 0.08);
    overflow: hidden;
}

.loading-bar-fill {
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    transition: width 0.2s ease;
}

/* ============================================================
   Detail header (ModelDetails / Viewer)
   ============================================================ */
.header {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-top: 6px;
}

.header h2 {
    font-family: var(--font-display);
    letter-spacing: -0.01em;
}

.back {
    position: absolute;
    left: 0;
    cursor: pointer;
    transition: transform var(--transition), background-color var(--transition);
    padding: 10px;
    margin: 6px;
    border-radius: var(--radius-full);
    color: var(--text-muted);
    display: flex;
}

.back:hover {
    transform: translateX(-2px);
    background-color: var(--surface-hover);
    color: var(--text);
}

.config-container {
    display: flex;
    flex-direction: row;
    gap: 10px;
    justify-content: center;
    align-items: center;
    padding: 6px 10px 20px;
    flex-wrap: wrap;
}

.model-details {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.config-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 13px;
    transition: border-color var(--transition), background-color var(--transition);
}

.config-item:hover {
    border-color: var(--border-strong);
    background: var(--surface-2);
}

.config-label {
    color: var(--accent-hover);
    font-weight: 600;
    letter-spacing: 0.01em;
}

.spacer {
    flex: 1;
}

.desktop-spacer {
    @media (min-width: 768px) {
        flex: 1;
    }
}

.title-button {
    background: none;
    border: none;
    font: inherit;
    color: inherit;
    cursor: pointer;
}

.viewer {
    margin: 0;
    padding: 0;
    overflow: hidden;
}

/* ============================================================
   Grid + cards (Leaderboard / ModelDetails scenes)
   ============================================================ */
.grid {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    width: 100%;
    padding: 4px 0 10px;
}

.grid-item {
    background: var(--surface);
    position: relative;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-sizing: border-box;
    overflow: hidden;
    width: 100%;
    padding: 0;
    cursor: pointer;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);

    @media (min-width: 576px) {
        width: calc(50% - 7px);
    }

    @media (min-width: 992px) {
        width: calc(33.333% - 10px);
    }

    @media (min-width: 1200px) {
        width: calc(25% - 11px);
    }
}

.grid-item::before {
    content: "";
    display: block;
    padding-top: 100%;
}

@media (max-width: 575px) {
    .grid-item::before {
        padding-top: 56.25%;
    }
}

.grid-item:hover {
    transform: translateY(-4px);
    border-color: rgba(212, 175, 55, 0.5);
    box-shadow: var(--glow);
}

.grid-item .title {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(to top, rgba(6, 7, 12, 0.92) 10%, rgba(6, 7, 12, 0.4) 70%, transparent);
    color: #fff;
    text-align: center;
    padding: 22px 10px 12px;
    box-sizing: border-box;
    font-size: 14px;
    font-weight: 500;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    transition: padding var(--transition);
}

.grid-item:hover .title {
    padding-bottom: 16px;
}

.grid-item .ranking {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 30px;
    height: 30px;
    padding: 0 8px;
    border-radius: var(--radius-full);
    background: rgba(12, 13, 19, 0.75);
    backdrop-filter: blur(6px);
    color: var(--text-muted);
    border: 1px solid var(--border-strong);
    box-sizing: border-box;
    font-size: 14px;
    font-weight: 700;
    font-family: var(--font-display);
    transition: transform var(--transition);
}

.grid-item:hover .ranking {
    transform: scale(1.06);
}

/* Podium (top 3) */
.grid-item .ranking.rank-1 {
    color: var(--accent-contrast);
    background: var(--accent-gradient);
    border-color: rgba(244, 220, 154, 0.6);
}

.grid-item .ranking.rank-2 {
    color: #10131a;
    background: linear-gradient(135deg, #eef1f7, #b9c0d1);
    border-color: rgba(238, 241, 247, 0.5);
}

.grid-item .ranking.rank-3 {
    color: #1c0f06;
    background: linear-gradient(135deg, #f0b487, #cf8248);
    border-color: rgba(240, 180, 135, 0.5);
}

.score-container {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    padding: 10px;
    box-sizing: border-box;
    color: var(--text-muted);
    font-size: 12px;
}

.score,
.votes {
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 3px 9px;
    border-radius: var(--radius-full);
    background: rgba(12, 13, 19, 0.7);
    backdrop-filter: blur(6px);
    border: 1px solid var(--border);
}

.score {
    color: var(--text);
    font-weight: 600;
}

.label {
    font-weight: 600;
    text-align: right;
    color: var(--text-subtle);
}

.thumbnail {
    position: absolute;
    top: 50%;
    left: 50%;
    width: auto;
    height: 100%;
    overflow: hidden;
    transform: translate(-50%, -50%);
    transition: transform var(--transition);
}

.grid-item:hover .thumbnail {
    transform: translate(-50%, -50%) scale(1.08);
}

/* ============================================================
   Vote view
   ============================================================ */
.vote-input {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
    margin-top: 6px;
}

.input-image {
    width: 132px;
    height: 132px;
    padding: 8px;
    border-radius: var(--radius-lg);
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    object-fit: contain;
}

.stats {
    position: absolute;
    top: 8px;
    left: 8px;
    color: var(--text-muted);
    display: flex;
    margin: 0;
    padding: 0;
    font-size: 11px;
    gap: 10px;
    z-index: 3;
}

.stats p {
    margin: 0;
    padding: 5px 10px;
    background: rgba(12, 13, 19, 0.72);
    backdrop-filter: blur(6px);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-variant-numeric: tabular-nums;
}

.vote-buttons-container {
    display: flex;
    flex-direction: row;
    gap: 12px;
    margin-top: 14px;
}

.voting-container {
    display: flex;
    justify-content: space-around;
    gap: 14px;
}

.viewer-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Buttons */
.vote-button {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border-strong);
    outline: none;
    padding: 10px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 600;
    width: 100%;
    height: 56px;
    cursor: pointer;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.vote-button:hover {
    transform: translateY(-2px);
    border-color: rgba(212, 175, 55, 0.6);
    box-shadow: var(--glow);
}

.vote-button:active {
    transform: translateY(0);
}

.skip-container {
    width: 50%;
    margin: 12px auto 0;
}

.skip-container .vote-button {
    height: 46px;
    font-size: 14px;
    color: var(--text-muted);
    background: transparent;
    border-color: var(--border);
}

.skip-container .vote-button:hover {
    color: var(--text);
    background: var(--surface);
    box-shadow: none;
    border-color: var(--border-strong);
    transform: none;
}

/* Render-mode toggle */
.mode-toggle {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    flex-direction: row;
    gap: 4px;
    padding: 4px;
    border-radius: var(--radius-full);
    background: rgba(12, 13, 19, 0.72);
    backdrop-filter: blur(6px);
    border: 1px solid var(--border);
    box-sizing: border-box;
    z-index: 3;
}

.mode-toggle input[type="radio"] {
    display: none;
}

.mode-toggle-icon {
    padding: 7px;
    color: var(--text-muted);
    background-color: transparent;
    width: 16px;
    height: 16px;
    border-radius: var(--radius-full);
    transition: background-color var(--transition), color var(--transition);
}

.mode-toggle-icon:hover {
    cursor: pointer;
    color: var(--text);
    background-color: var(--surface-hover);
}

.mode-toggle input[type="radio"]:checked + .mode-toggle-icon {
    background: var(--accent-gradient);
    color: var(--accent-contrast);
}

/* ============================================================
   Tabs
   ============================================================ */
.nav-row {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    margin: 14px 0;
}

.tabs {
    display: inline-flex;
    justify-content: left;
    gap: 6px;
    align-items: center;
    padding: 5px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    box-sizing: border-box;
}

.tabs button {
    background-color: transparent;
    color: var(--text-muted);
    border: none;
    outline: none;
    padding: 9px 18px;
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: color var(--transition), background var(--transition);
}

.tabs button:hover {
    color: var(--text);
    background-color: var(--surface-hover);
}

.tabs button.active {
    background: var(--accent-gradient);
    color: var(--accent-contrast);
    box-shadow: 0 6px 18px -6px rgba(212, 175, 55, 0.55);
}

/* ============================================================
   Filter menu
   ============================================================ */
.filter-container {
    position: relative;
    margin-left: auto;
}

.filter-button {
    background: var(--surface);
    border: 1px solid var(--border-strong);
    color: var(--text);
    padding: 9px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: background-color var(--transition), border-color var(--transition);
    gap: 4px;
    font-size: 14px;
}

.filter-button:hover {
    background-color: var(--surface-hover);
    border-color: var(--border-strong);
}

.filter-button .caret {
    transition: transform var(--transition);
    margin-left: 2px;
}

.filter-button[aria-expanded="true"] {
    border-color: var(--accent);
    color: var(--accent-hover);
}

.filter-button[aria-expanded="true"] .caret {
    transform: rotate(180deg);
}

.filter-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    padding: 6px;
    min-width: 210px;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    animation: dropdown-in 140ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

@keyframes dropdown-in {
    from {
        opacity: 0;
        transform: translateY(-6px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.filter-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 12px;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    font-size: 14px;
    transition: all var(--transition);
    background-color: transparent;
    position: relative;
}

.filter-option:hover {
    background-color: var(--surface-hover);
    color: var(--text);
}

.filter-option.active {
    background-color: var(--accent-soft);
    color: var(--text);
}

.filter-label {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-icon {
    color: var(--text-subtle);
    transition: color var(--transition);
}

.filter-option:hover .filter-icon,
.filter-option.active .filter-icon {
    color: var(--accent-hover);
}

.filter-checkbox {
    position: absolute;
    right: 12px;
    color: transparent;
    transition: color var(--transition);
    font-size: 14px;
}

.filter-option.active .filter-checkbox {
    color: var(--accent-hover);
}

.filter-section {
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
}

.filter-section:last-child {
    border-bottom: none;
}

.filter-section-title {
    padding: 4px 12px;
    color: var(--text-subtle);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}

/* ============================================================
   Dev banner
   ============================================================ */
.dev-banner {
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.18), rgba(255, 138, 76, 0.1));
    color: var(--warn);
    padding: 9px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    border: 1px solid rgba(255, 107, 53, 0.35);
    border-radius: var(--radius-full);
    margin: 0 0 10px;
    text-align: center;
    justify-content: center;
}

.dev-banner span {
    margin: 0;
}

/* ============================================================
   About sections
   ============================================================ */
.section {
    padding: 20px 22px;
    margin: 12px 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.section:first-child {
    background:
        linear-gradient(135deg, rgba(212, 175, 55, 0.1), rgba(184, 134, 11, 0.05)),
        var(--surface);
}

.section h3 {
    position: relative;
    font-family: var(--font-display);
    font-size: 17px;
    letter-spacing: -0.01em;
    margin: 0 0 10px;
    padding-left: 12px;
}

.section h3::before {
    content: "";
    position: absolute;
    left: 0;
    top: 2px;
    bottom: 2px;
    width: 3px;
    border-radius: var(--radius-full);
    background: var(--accent-gradient);
}

.section p {
    line-height: 1.65;
    margin: 8px 0;
}

/* ============================================================
   Topology warning banner
   ============================================================ */
.topology-warning {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--accent-soft);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    margin: 14px 0;
    font-size: 14px;
    font-weight: 500;
    color: #e8d9a8;
}

.topology-warning-icon {
    flex-shrink: 0;
    color: var(--accent);
}

.topology-warning-text {
    margin: 0;
    text-align: center;
}