/* ═══════════════════════════════════════════════════════════════
   STAR DRIFTER - Game Styles
   File: %OneDrive%\CODING\APPS\Ultracirculum_Hub\ultracirculum.cloud\stardrifter\stardrifter.css
   Theme: Ultracirculum dark space + violet/gold neon accents
   Layout rule: Flexbox/Grid only (overlay stacking via grid-area 1/1)
   ═══════════════════════════════════════════════════════════════ */

:root {
    --standard-spacing: 20px;
    --sdr-accent: #A97BFF;
    --sdr-accent-2: #FFD16B;
    --sdr-glass-bg: rgba(3, 7, 18, 0.2);
    --sdr-panel-bg: rgba(3, 7, 18, 0.55);
    --sdr-border: rgba(169, 123, 255, 0.35);
    --sdr-text: #F0EAFF;
    --sdr-text-dim: rgba(240, 234, 255, 0.65);
}

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

body {
    min-height: 100vh;
    background: radial-gradient(ellipse at 50% 0%, #140B30 0%, #0A051A 55%, #030712 100%);
    color: var(--sdr-text);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
}

/* Background animation canvases (hub pattern): stars behind, front fireflies above content */
.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; }

.sdr-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) */
.sdr-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(169, 123, 255, 0.2);
    box-shadow: 0 2px 8px rgba(169, 123, 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(--sdr-accent);
}

.sdr-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;
}

.sdr-sound-btn:hover {
    background: rgba(169, 123, 255, 0.2);
}

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

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

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

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

/* Stage: canvas + overlays stacked in the SAME grid cell (no position hacks) */
.sdr-stage {
    display: grid;
    border: 1px solid var(--sdr-border);
    border-radius: 12px;
    overflow: hidden;
    background: var(--sdr-glass-bg);
    backdrop-filter: blur(4px);
}

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

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

/* Fullscreen button: floats top-right inside the stage, above overlays */
.sdr-fs-btn {
    grid-area: 1 / 1;
    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(--sdr-text);
    font-size: 1.1rem;
    line-height: 1;
    padding: 6px 10px;
    cursor: pointer;
    transition: background 0.2s ease;
}

.sdr-fs-btn:hover {
    background: rgba(169, 123, 255, 0.25);
}

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

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

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

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

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

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

.sdr-overlay-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    background: var(--sdr-panel-bg);
    border: 1px solid var(--sdr-border);
    border-radius: 12px;
    padding: 28px 36px;
    width: min(90%, 360px);
    text-align: center;
}

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

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

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

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

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

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

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

.sdr-btn {
    padding: 12px 32px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(90deg, var(--sdr-accent), var(--sdr-accent-2));
    color: #140A20;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    transition: filter 0.15s ease;
}

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

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

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

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

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

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

.sdr-board-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 14px;
    border-radius: 8px;
    background: rgba(169, 123, 255, 0.06);
    counter-increment: rank;
}

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

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

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

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

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

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

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

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

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

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

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

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

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