/* ==========================================================================
   DAILY SNAKE (2026-08-15) - 天球星轨：星宿织梦与重力透镜
   Visual Theme: Vintage Celestial Astrolabe & Constellation Canvas
   ========================================================================== */

:root {
    --bg-dark: #070a14;
    --bg-navy: #0e1428;
    --gold-primary: #f0cc6b;
    --gold-glow: #ffdf80;
    --gold-dark: #b8912e;
    --cyan-neon: #00f0ff;
    --cyan-glow: rgba(0, 240, 255, 0.4);
    --violet-cosmic: #a259ff;
    --text-light: #f1f5f9;
    --text-muted: #94a3b8;
    --glass-bg: rgba(14, 20, 40, 0.75);
    --glass-border: rgba(240, 204, 107, 0.25);
    --font-heading: 'Cinzel', serif;
    --font-body: 'Noto Sans SC', 'Outfit', sans-serif;
    --font-ui: 'Outfit', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
}

html, body {
    width: 100%;
    height: 100%;
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 50% 20%, rgba(30, 45, 85, 0.4) 0%, transparent 60%),
        radial-gradient(circle at 80% 80%, rgba(162, 89, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 10% 90%, rgba(0, 240, 255, 0.12) 0%, transparent 50%);
    color: var(--text-light);
    font-family: var(--font-body);
    overflow-x: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    align-items: center;
    justify-content: space-between;
}

/* ================= Top Bar Header ================= */
.top-bar {
    width: 100%;
    max-width: 1100px;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    z-index: 100;
}

.brand {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.back-link {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--gold-primary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: rgba(240, 204, 107, 0.08);
    transition: all 0.25s ease;
}

.back-link:hover {
    background: rgba(240, 204, 107, 0.2);
    border-color: var(--gold-primary);
    transform: translateX(-2px);
}

.back-link .icon {
    width: 18px;
    height: 18px;
}

.title-group {
    display: flex;
    flex-direction: column;
}

.game-tag {
    font-size: 0.75rem;
    color: var(--cyan-neon);
    letter-spacing: 1px;
    font-weight: 700;
    text-transform: uppercase;
}

.game-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--gold-primary);
    letter-spacing: 1.5px;
    text-shadow: 0 0 12px rgba(240, 204, 107, 0.3);
}

.game-title .subtitle {
    font-size: 0.85rem;
    font-family: var(--font-ui);
    color: var(--text-muted);
    font-weight: 600;
    margin-left: 0.5rem;
}

.top-actions {
    display: flex;
    gap: 0.6rem;
}

.icon-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-light);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.25s ease;
}

.icon-btn:hover {
    background: rgba(240, 204, 107, 0.15);
    border-color: var(--gold-primary);
    color: var(--gold-primary);
}

.icon-btn .icon {
    width: 20px;
    height: 20px;
}

.hidden {
    display: none !important;
}

/* ================= Main Game Layout ================= */
.game-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 1000px;
    padding: 1rem;
    gap: 1rem;
}

/* HUD Dashboard */
.hud-bar {
    width: 100%;
    max-width: 800px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
    z-index: 10;
}

.hud-item {
    background: rgba(14, 20, 40, 0.8);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 0.6rem 0.8rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.4);
}

.hud-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-bottom: 0.2rem;
}

.hud-value {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-light);
}

.hud-value.highlight {
    color: var(--gold-primary);
    text-shadow: 0 0 8px rgba(240, 204, 107, 0.5);
}

.constellation-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
}

.const-name {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--cyan-neon);
}

.const-dots {
    display: flex;
    gap: 4px;
}

.const-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.4);
    transition: all 0.3s ease;
}

.const-dot.active {
    background: var(--gold-primary);
    box-shadow: 0 0 8px var(--gold-glow);
    border-color: var(--gold-glow);
}

/* Energy Bar */
.energy-bar-outer {
    width: 100%;
    height: 10px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: 5px;
    overflow: hidden;
    margin-top: 4px;
}

.energy-bar-inner {
    height: 100%;
    background: linear-gradient(90deg, #00f0ff, #a259ff, #ffd700);
    box-shadow: 0 0 10px var(--cyan-neon);
    transition: width 0.15s ease-out;
}

.combo-text {
    color: #ff5252;
    text-shadow: 0 0 10px rgba(255, 82, 82, 0.6);
}

/* Canvas Container */
.canvas-wrapper {
    position: relative;
    width: 100%;
    max-width: 800px;
    aspect-ratio: 4 / 3;
    background: #050811;
    border-radius: 16px;
    border: 2px solid var(--gold-dark);
    box-shadow: 
        0 0 30px rgba(0, 0, 0, 0.8),
        0 0 20px rgba(240, 204, 107, 0.15),
        inset 0 0 30px rgba(0, 0, 0, 0.6);
    overflow: hidden;
}

.astrolabe-rim-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    border-radius: 14px;
    box-shadow: inset 0 0 0 2px rgba(240, 204, 107, 0.3);
    z-index: 5;
}

#game-canvas {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 14px;
}

/* Overlays */
.game-overlay {
    position: absolute;
    inset: 0;
    background: rgba(7, 10, 20, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    z-index: 20;
    transition: opacity 0.3s ease;
}

.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
}

.overlay-card {
    width: 100%;
    max-width: 480px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
}

.astrolabe-badge {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    letter-spacing: 3px;
    color: var(--cyan-neon);
    background: rgba(0, 240, 255, 0.1);
    padding: 0.3rem 0.9rem;
    border-radius: 20px;
    border: 1px solid var(--cyan-glow);
}

.overlay-card h2 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    color: var(--gold-primary);
    text-shadow: 0 0 12px rgba(240, 204, 107, 0.4);
}

.overlay-card .desc {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-light);
}

/* Features list in overlay */
.features-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    width: 100%;
    text-align: left;
    margin: 0.5rem 0;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0.7rem;
    border-radius: 10px;
}

.feat-icon {
    font-size: 1.4rem;
    line-height: 1;
}

.feature-item strong {
    font-size: 0.9rem;
    color: var(--gold-primary);
    display: block;
    margin-bottom: 0.15rem;
}

.feature-item p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.3;
}

.feature-item code {
    background: rgba(240, 204, 107, 0.2);
    color: var(--gold-primary);
    padding: 1px 5px;
    border-radius: 4px;
}

/* Control Hints */
.control-hints-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

kbd {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 4px;
    padding: 2px 6px;
    font-family: monospace;
    color: var(--gold-primary);
    font-weight: bold;
}

/* Buttons */
.btn {
    padding: 0.8rem 1.8rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.25s ease;
    border: none;
    font-family: var(--font-body);
}

.btn-primary {
    background: linear-gradient(135deg, var(--gold-dark), var(--gold-primary));
    color: #080c1a;
    box-shadow: 0 4px 15px rgba(240, 204, 107, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(240, 204, 107, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--glass-border);
    color: var(--text-light);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.18);
    color: var(--gold-primary);
}

.pulse-btn {
    animation: pulseGlow 2s infinite ease-in-out;
}

@keyframes pulseGlow {
    0%, 100% { box-shadow: 0 4px 15px rgba(240, 204, 107, 0.4); }
    50% { box-shadow: 0 4px 25px rgba(240, 204, 107, 0.8); }
}

/* Result Stats */
.result-stats {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    background: rgba(0, 0, 0, 0.3);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

.stat-row strong {
    font-family: var(--font-heading);
    font-size: 1.1rem;
}

.overlay-buttons {
    display: flex;
    gap: 1rem;
    width: 100%;
}

.overlay-buttons .btn {
    flex: 1;
}

/* ================= Mobile Touch Controls ================= */
.mobile-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 800px;
    padding: 0.5rem 1rem;
}

.dpad {
    display: grid;
    grid-template-columns: repeat(3, 44px);
    grid-template-rows: repeat(3, 44px);
    gap: 4px;
}

.dpad-btn {
    background: rgba(14, 20, 40, 0.8);
    border: 1px solid var(--glass-border);
    color: var(--gold-primary);
    border-radius: 8px;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    touch-action: manipulation;
}

.dpad-btn:active {
    background: var(--gold-primary);
    color: #000;
}

.dpad-btn.up { grid-column: 2; grid-row: 1; }
.dpad-btn.left { grid-column: 1; grid-row: 2; }
.dpad-btn.down { grid-column: 2; grid-row: 3; }
.dpad-btn.right { grid-column: 3; grid-row: 2; }

.mobile-skill-zone {
    display: flex;
    align-items: center;
}

.grav-skill-btn {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(162, 89, 255, 0.3));
    border: 2px solid var(--cyan-neon);
    border-radius: 50%;
    width: 76px;
    height: 76px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    cursor: pointer;
    box-shadow: 0 0 15px var(--cyan-glow);
    transition: transform 0.1s ease;
    touch-action: manipulation;
}

.grav-skill-btn:active {
    transform: scale(0.92);
    background: var(--cyan-neon);
    color: #000;
}

.skill-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.skill-text {
    font-size: 0.65rem;
    font-weight: 700;
    margin-top: 2px;
}

/* ================= Lore & Footer ================= */
.lore-section {
    width: 100%;
    background: rgba(7, 10, 20, 0.9);
    border-top: 1px solid var(--glass-border);
    padding: 2.5rem 1.5rem;
    margin-top: 2rem;
    display: flex;
    justify-content: center;
}

.lore-container {
    width: 100%;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.lore-container h2 {
    font-family: var(--font-heading);
    color: var(--gold-primary);
    font-size: 1.3rem;
}

.lore-container p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

.lore-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.2rem;
}

.lore-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1.2rem;
}

.lore-box h3 {
    font-size: 1rem;
    color: var(--cyan-neon);
    margin-bottom: 0.6rem;
}

.lore-box ul {
    list-style-type: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    font-size: 0.85rem;
    color: var(--text-light);
}

.lore-box li strong {
    color: var(--gold-primary);
}

.copyright-bar {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Modal */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-card {
    width: 100%;
    max-width: 450px;
    padding: 1.5rem;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.5rem;
}

.modal-header h3 {
    font-family: var(--font-heading);
    color: var(--gold-primary);
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.close-btn:hover {
    color: var(--text-light);
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    font-size: 0.88rem;
    line-height: 1.5;
    color: var(--text-light);
}

/* Responsive Breakpoints */
@media (min-width: 768px) {
    .mobile-controls {
        display: none;
    }
}

@media (max-width: 767px) {
    .top-bar {
        padding: 0.8rem 1rem;
    }

    .game-title {
        font-size: 1.1rem;
    }

    .game-title .subtitle {
        display: none;
    }

    .hud-bar {
        grid-template-columns: repeat(2, 1fr);
    }

    .overlay-card {
        padding: 1.2rem;
    }

    .overlay-card h2 {
        font-size: 1.3rem;
    }
}