/* ═══════════════════════════════════════════════════════════════
   VOCAB RACER - Game Styles
   File: %OneDrive%\CODING\APPS\Ultracirculum_Hub\ultracirculum.cloud\vocabracer\vocabracer.css
   Theme: Ultracirculum dark space + electric blue/lime neon accents
   Layout rule: Flexbox/Grid only (overlay stacking via grid-area 1/1)
   ═══════════════════════════════════════════════════════════════ */

:root {
    --standard-spacing: 20px;
    --vrc-accent: #6BC8FF;
    --vrc-accent-2: #C8FF6B;
    --vrc-glass-bg: rgba(3, 7, 18, 0.2);
    --vrc-panel-bg: rgba(3, 7, 18, 0.55);
    --vrc-border: rgba(107, 200, 255, 0.35);
    --vrc-text: #EAF6FF;
    --vrc-text-dim: rgba(234, 246, 255, 0.65);
}

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

body {
    min-height: 100vh;
    background: radial-gradient(ellipse at 50% 0%, #0A1A30 0%, #050D1A 55%, #030712 100%);
    color: var(--vrc-text);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
}

/* Background animation canvases (hub pattern) */
.stars, .fireflies, .fireflies-front {
    position: fixed;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    -webkit-user-select: none;
    user-select: none;
}

.stars { z-index: 0; }
.fireflies { z-index: 1; }
.fireflies-front { z-index: 2; }

.vrc-page {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 840px;
    display: flex;
    flex-direction: column;
    gap: var(--standard-spacing);
    padding: var(--standard-spacing);
}

/* Top navigation (hub pattern) */
.vrc-top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: rgba(15, 15, 40, 0.3);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.home-btn {
    background: rgba(15, 15, 40, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.08);
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    transition: background 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.home-btn:hover {
    background: rgba(107, 200, 255, 0.2);
    box-shadow: 0 2px 8px rgba(107, 200, 255, 0.3);
}

.home-icon {
    width: 20px;
    height: 20px;
    color: rgba(255, 255, 255, 0.8);
    transition: color 0.2s ease;
}

.home-btn:hover .home-icon {
    color: var(--vrc-accent);
}

.vrc-sound-btn {
    background: rgba(15, 15, 40, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 4px 10px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s ease;
}

.vrc-sound-btn:hover {
    background: rgba(107, 200, 255, 0.2);
}

.vrc-header {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.vrc-title {
    font-size: 2.2rem;
    letter-spacing: 2px;
    background: linear-gradient(90deg, var(--vrc-accent), var(--vrc-accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.vrc-subtitle {
    color: var(--vrc-text-dim);
    font-size: 0.95rem;
}

.vrc-main {
    display: flex;
    flex-direction: column;
    gap: var(--standard-spacing);
}

/* Stage: canvas + overlays stacked in the SAME grid cell */
.vrc-stage {
    display: grid;
    border: 1px solid var(--vrc-border);
    border-radius: 12px;
    overflow: hidden;
    background: var(--vrc-glass-bg);
    backdrop-filter: blur(4px);
}

.vrc-stage > * {
    grid-area: 1 / 1;
}

#gameCanvas {
    width: 100%;
    height: auto;
    display: block;
    touch-action: none;
}

/* Fullscreen button */
.vrc-fs-btn {
    justify-self: end;
    align-self: start;
    z-index: 3;
    margin: 10px;
    background: rgba(15, 15, 40, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    color: var(--vrc-text);
    font-size: 1.1rem;
    line-height: 1;
    padding: 6px 10px;
    cursor: pointer;
    transition: background 0.2s ease;
}

.vrc-fs-btn:hover {
    background: rgba(107, 200, 255, 0.25);
}

/* Native fullscreen: center canvas, keep 3:2 aspect (840x560 -> 150vh) */
.vrc-stage:fullscreen {
    border: none;
    border-radius: 0;
    background: #030712;
    place-items: center;
}

.vrc-stage:fullscreen #gameCanvas {
    width: min(100vw, 150vh);
    height: auto;
}

/* iOS fallback: fixed overlay pseudo-fullscreen */
.vrc-stage.fs-fallback {
    position: fixed;
    inset: 0;
    z-index: 999;
    border: none;
    border-radius: 0;
    background: #030712;
    place-items: center;
}

.vrc-stage.fs-fallback #gameCanvas {
    width: min(100vw, 150vh);
    height: auto;
}

/* Overlays */
.vrc-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(3, 7, 18, 0.7);
    z-index: 2;
}

.vrc-overlay.hidden {
    display: none;
}

.vrc-overlay-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    background: var(--vrc-panel-bg);
    border: 1px solid var(--vrc-border);
    border-radius: 12px;
    padding: 28px 36px;
    width: min(90%, 380px);
    text-align: center;
}

.vrc-overlay-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--vrc-accent);
    letter-spacing: 1px;
}

.vrc-nick-label {
    font-size: 0.85rem;
    color: var(--vrc-text-dim);
}

.vrc-nick-input {
    width: 100%;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--vrc-border);
    background: rgba(3, 7, 18, 0.6);
    color: var(--vrc-text);
    font-size: 1rem;
    text-align: center;
    outline: none;
}

.vrc-nick-input:focus {
    border-color: var(--vrc-accent);
}

.vrc-nick-error {
    color: #FF8A8A;
    font-size: 0.8rem;
    min-height: 1em;
}

.vrc-howto {
    font-size: 0.85rem;
    color: var(--vrc-text-dim);
}

.vrc-reveal {
    font-size: 0.95rem;
    color: var(--vrc-text-dim);
}

.vrc-reveal b {
    color: var(--vrc-accent);
}

.vrc-final-score {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--vrc-accent-2);
}

.vrc-submit-status {
    font-size: 0.9rem;
    color: var(--vrc-text-dim);
    min-height: 1.2em;
}

.vrc-btn {
    padding: 12px 32px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(90deg, var(--vrc-accent), var(--vrc-accent-2));
    color: #06131F;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    transition: filter 0.15s ease;
}

.vrc-btn:hover {
    filter: brightness(1.15);
}

/* Leaderboard */
.vrc-board-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.vrc-board-title {
    font-size: 1.2rem;
    color: var(--vrc-accent);
    letter-spacing: 1px;
}

.vrc-board-week {
    font-size: 0.85rem;
    color: var(--vrc-text-dim);
    font-weight: 400;
}

.vrc-board-container {
    background: var(--vrc-glass-bg);
    backdrop-filter: blur(4px);
    border: 1px solid var(--vrc-border);
    border-radius: 12px;
    padding: var(--standard-spacing);
}

.vrc-board-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    counter-reset: rank;
}

.vrc-board-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 14px;
    border-radius: 8px;
    background: rgba(107, 200, 255, 0.06);
    counter-increment: rank;
}

.vrc-board-list li::before {
    content: counter(rank);
    font-weight: 700;
    color: var(--vrc-accent);
    min-width: 24px;
    text-align: right;
}

.vrc-board-list li.vrc-board-top1 {
    background: rgba(255, 209, 107, 0.12);
    border: 1px solid rgba(255, 209, 107, 0.45);
}

.vrc-board-list li.vrc-board-me {
    border: 1px solid var(--vrc-accent-2);
}

.vrc-board-nick {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.vrc-board-score {
    font-weight: 700;
    color: var(--vrc-accent-2);
}

.vrc-board-loading,
.vrc-board-empty {
    color: var(--vrc-text-dim);
    justify-content: center;
}

.vrc-board-loading::before,
.vrc-board-empty::before {
    content: '';
    min-width: 0;
}

.vrc-board-note {
    font-size: 0.8rem;
    color: var(--vrc-text-dim);
    text-align: center;
}

/* Footer */
.vrc-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding-bottom: var(--standard-spacing);
}

.vrc-copyright {
    font-size: 0.75rem;
    color: var(--vrc-text-dim);
}

/* Mobile */
@media (max-width: 767px) {
    .vrc-title {
        font-size: 1.6rem;
    }

    .vrc-overlay-card {
        padding: 20px;
        gap: 10px;
    }

    .vrc-final-score {
        font-size: 2rem;
    }
}