/* ===========================================
   BOCONG GAME - Premium Tetris Stylesheet
   =========================================== */
:root {
    /* Modern Color Palette */
    --bg-primary: #0a0e27;
    --bg-secondary: #0f1729;
    --bg-card: rgba(15, 23, 42, 0.8);
    --color-cyan: #00d4ff;
    --color-pink: #ff006e;
    --color-yellow: #ffd60a;
    --color-green: #06ffa5;
    --color-purple: #8b5cf6;
    --color-orange: #ff5c00;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-dim: #64748b;
    /* Shadows & Effects */
    --glow-cyan: rgba(0, 212, 255, 0.5);
    --glow-pink: rgba(255, 0, 110, 0.5);
    --shadow-strong: 0 20px 60px rgba(0, 0, 0, 0.4);
    --shadow-medium: 0 10px 30px rgba(0, 0, 0, 0.3);
    /* Spacing */
    --gap-xs: 0.5rem;
    --gap-sm: 0.75rem;
    --gap-md: 1rem;
    --gap-lg: 1.5rem;
    --gap-xl: 2rem;
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}
/* ===========================================
   Reset & Base Styles
   =========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a1f3a 50%, var(--bg-primary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}
/* Animated Star Background */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background-image:
        radial-gradient(2px 2px at 20% 30%, white, transparent),
        radial-gradient(2px 2px at 60% 70%, white, transparent),
        radial-gradient(1px 1px at 50% 50%, white, transparent),
        radial-gradient(1px 1px at 80% 10%, white, transparent),
        radial-gradient(2px 2px at 90% 60%, white, transparent);
    background-size: 200px 200px;
    animation: stars-twinkle 20s linear infinite;
    opacity: 0.4;
    z-index: 0;
}
@keyframes stars-twinkle {
    from {
        transform: translateY(0);
    }
    to {
        transform: translateY(-200px);
    }
}
/* ===========================================
   Container & Layout
   =========================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--gap-lg);
    position: relative;
    z-index: 1;
}
/* Header */
.game-header {
    text-align: center;
    margin-bottom: var(--gap-xl);
    animation: slideDown 0.8s ease-out;
}
.game-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 900;
    letter-spacing: 0.1em;
    line-height: 1;
    margin-bottom: var(--gap-sm);
}
.title-main {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-cyan), var(--color-pink));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 40px var(--glow-cyan));
    animation: glow-pulse 2s ease-in-out infinite;
}
.title-sub {
    display: inline-block;
    color: var(--color-yellow);
    filter: drop-shadow(0 0 30px rgba(255, 214, 10, 0.6));
}
@keyframes glow-pulse {
    0%,
    100% {
        filter: drop-shadow(0 0 40px var(--glow-cyan));
    }
    50% {
        filter: drop-shadow(0 0 60px var(--glow-cyan));
    }
}
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.tagline {
    font-size: clamp(0.875rem, 2vw, 1.125rem);
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.05em;
}
/* ===========================================
   Game Layout Grid
   =========================================== */
.game-layout {
    display: grid;
    grid-template-columns: minmax(200px, 280px) auto minmax(280px, 320px);
    gap: var(--gap-lg);
    align-items: start;
    animation: fadeIn 1s ease-out;
}
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}
/* ===========================================
   Sidebars
   =========================================== */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--gap-md);
}
/* Stat Cards */
.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--gap-md);
    box-shadow: var(--shadow-medium);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: var(--gap-md);
}
.stat-card:hover {
    transform: translateY(-3px);
    border-color: var(--color-cyan);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.2);
}
.stat-icon {
    font-size: 2rem;
    line-height: 1;
}
.stat-info {
    flex: 1;
}
.stat-label {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.1em;
    margin-bottom: var(--gap-xs);
}
.stat-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-cyan), var(--color-green));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.next-piece-card {
    flex-direction: column;
    align-items: center;
}
#nextPiece {
    margin-top: var(--gap-sm);
    background: rgba(0, 0, 0, 0.4);
    border-radius: var(--radius-sm);
}
/* ===========================================
   Game Board
   =========================================== */
.game-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--gap-md);
}
.game-board-wrapper {
    position: relative;
    display: inline-block;
}
#tetris {
    display: block;
    background: rgba(0, 0, 0, 0.6);
    border: 3px solid var(--color-cyan);
    border-radius: var(--radius-md);
    box-shadow:
        0 0 60px var(--glow-cyan),
        inset 0 0 40px rgba(0, 0, 0, 0.6);
    image-rendering: pixelated;
}
/* Particle Effects Container */
.particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    border-radius: var(--radius-md);
}
.particle {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    animation: particle-explode 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
@keyframes particle-explode {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(var(--tx), var(--ty)) scale(0);
        opacity: 0;
    }
}
/* Game Over Overlay */
.game-over-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 14, 39, 0.97);
    backdrop-filter: blur(15px);
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    z-index: 10;
}
.game-over-overlay.active {
    display: flex;
    animation: fadeIn 0.4s ease-out;
}
.game-over-content {
    text-align: center;
    padding: var(--gap-xl);
    animation: scaleIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes scaleIn {
    from {
        transform: scale(0.5);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}
.game-over-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-pink), var(--color-yellow));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--gap-lg);
    animation: shake 0.5s ease-out;
}
@keyframes shake {
    0%,
    100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-15px);
    }
    75% {
        transform: translateX(15px);
    }
}
.final-stats {
    margin-bottom: var(--gap-xl);
}
.final-label {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--gap-xs);
}
.final-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-yellow);
    text-shadow: 0 0 30px rgba(255, 214, 10, 0.6);
}
/* ===========================================
   Mobile Controls
   =========================================== */
.mobile-controls {
    display: none;
    /* Hidden by default, shown on mobile */
    flex-direction: column;
    gap: var(--gap-sm);
    padding: var(--gap-md);
    background: var(--bg-card);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 350px;
}
.control-row {
    display: flex;
    gap: var(--gap-sm);
    justify-content: center;
}
.control-btn {
    min-width: 75px;
    height: 75px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(6, 255, 165, 0.15));
    border: 2px solid var(--color-cyan);
    border-radius: var(--radius-md);
    color: var(--color-cyan);
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    touch-action: manipulation;
    user-select: none;
}
.control-btn svg {
    width: 32px;
    height: 32px;
}
.control-btn:active {
    transform: scale(0.95);
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.3), rgba(6, 255, 165, 0.3));
    box-shadow: 0 0 25px var(--glow-cyan);
}
.btn-rotate,
.btn-drop {
    flex: 1;
}
.btn-down {
    flex-direction: column;
}
/* ===========================================
   Leaderboard
   =========================================== */
.leaderboard-card {
    background: var(--bg-card);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--gap-lg);
    box-shadow: var(--shadow-medium);
    max-height: 500px;
    display: flex;
    flex-direction: column;
}
.leaderboard-header {
    text-align: center;
    margin-bottom: var(--gap-md);
    padding-bottom: var(--gap-md);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}
.leaderboard-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.125rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-yellow), var(--color-orange));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--gap-xs);
}
.leaderboard-subtitle {
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.1em;
}
.leaderboard-list {
    flex: 1;
    overflow-y: auto;
    padding-right: 0.5rem;
}
.leaderboard-list::-webkit-scrollbar {
    width: 6px;
}
.leaderboard-list::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
}
.leaderboard-list::-webkit-scrollbar-thumb {
    background: var(--color-cyan);
    border-radius: 3px;
}
.leaderboard-item {
    display: grid;
    grid-template-columns: 40px 1fr auto;
    align-items: center;
    gap: var(--gap-sm);
    padding: var(--gap-sm);
    margin-bottom: var(--gap-xs);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    border-left: 3px solid transparent;
    transition: all 0.3s ease;
}
.leaderboard-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-left-color: var(--color-cyan);
    transform: translateX(5px);
}
/* Top 3 Special Styling */
.leaderboard-item.rank-1 {
    background: linear-gradient(90deg, rgba(255, 214, 10, 0.25), rgba(255, 214, 10, 0.05));
    border-left-color: var(--color-yellow);
}
.leaderboard-item.rank-2 {
    background: linear-gradient(90deg, rgba(192, 192, 192, 0.25), rgba(192, 192, 192, 0.05));
    border-left-color: #c0c0c0;
}
.leaderboard-item.rank-3 {
    background: linear-gradient(90deg, rgba(205, 127, 50, 0.25), rgba(205, 127, 50, 0.05));
    border-left-color: #cd7f32;
}
.rank-badge {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-dim);
    text-align: center;
}
.rank-1 .rank-badge {
    color: var(--color-yellow);
    font-size: 1.125rem;
}
.rank-2 .rank-badge {
    color: #c0c0c0;
    font-size: 1rem;
}
.rank-3 .rank-badge {
    color: #cd7f32;
    font-size: 1rem;
}
.player-name {
    font-size: 0.875rem;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 600;
}
.rank-1 .player-name {
    font-size: 1rem;
    font-weight: 700;
}
.player-score {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-cyan);
}
.rank-1 .player-score {
    font-size: 1.125rem;
    color: var(--color-yellow);
}
/* ===========================================
   Controls Info
   =========================================== */
.controls-info {
    background: var(--bg-card);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--gap-md);
    box-shadow: var(--shadow-medium);
}
.controls-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.875rem;
    color: var(--color-cyan);
    text-align: center;
    margin-bottom: var(--gap-md);
    letter-spacing: 0.1em;
}
.control-guide {
    display: flex;
    flex-direction: column;
    gap: var(--gap-sm);
}
.guide-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--gap-xs) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.guide-item:last-child {
    border-bottom: none;
}
kbd {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-cyan);
    background: rgba(0, 212, 255, 0.1);
    padding: 0.35rem 0.6rem;
    border-radius: 0.35rem;
    border: 1px solid var(--color-cyan);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}
.guide-item span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}
/* ===========================================
   Buttons
   =========================================== */
.game-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--gap-sm);
}
.btn {
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    padding: var(--gap-md) var(--gap-lg);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
}
.btn-primary {
    background: linear-gradient(135deg, var(--color-cyan), var(--color-green));
    color: var(--bg-primary);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.6);
}
.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--color-cyan);
}
.btn-restart {
    background: linear-gradient(135deg, var(--color-pink), var(--color-orange));
    color: white;
    box-shadow: 0 10px 30px rgba(255, 0, 110, 0.4);
}
.btn-restart:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(255, 0, 110, 0.6);
}
.btn:active {
    transform: translateY(0);
}
/* ===========================================
   Username Modal
   =========================================== */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.3s ease-out;
}
.modal-backdrop.hidden {
    display: none;
}
.modal-box {
    background: var(--bg-card);
    backdrop-filter: blur(25px);
    border: 3px solid var(--color-cyan);
    border-radius: var(--radius-xl);
    padding: var(--gap-xl);
    max-width: 500px;
    width: 90%;
    box-shadow:
        0 0 80px var(--glow-cyan),
        var(--shadow-strong);
    animation: modalSlideIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes modalSlideIn {
    from {
        transform: scale(0.7) translateY(-50px);
        opacity: 0;
    }
    to {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}
.modal-header {
    text-align: center;
    margin-bottom: var(--gap-xl);
}
.modal-icon {
    font-size: 4rem;
    margin-bottom: var(--gap-md);
    animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}
.modal-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-cyan), var(--color-purple));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--gap-sm);
}
.modal-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}
.modal-body {
    margin-bottom: var(--gap-lg);
}
.input-group {
    margin-bottom: var(--gap-lg);
}
.username-field {
    width: 100%;
    font-family: 'Inter', sans-serif;
    font-size: 1.125rem;
    padding: var(--gap-md);
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-align: center;
    transition: all 0.3s ease;
    outline: none;
}
.username-field:focus {
    border-color: var(--color-cyan);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 25px var(--glow-cyan);
}
.username-field::placeholder {
    color: var(--text-dim);
}
.input-hint {
    margin-top: var(--gap-xs);
    font-size: 0.75rem;
    color: var(--text-dim);
    text-align: center;
}
.btn-modal {
    width: 100%;
    background: linear-gradient(135deg, var(--color-cyan), var(--color-green));
    color: var(--bg-primary);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.5);
}
.btn-modal:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.7);
}
.modal-footer {
    text-align: center;
    padding-top: var(--gap-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.modal-footer p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}
/* ===========================================
   Responsive Design
   =========================================== */
@media (max-width: 1200px) {
    .game-layout {
        grid-template-columns: 1fr;
        justify-items: center;
    }
    .sidebar-left {
        order: 2;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        width: 100%;
        max-width: 600px;
    }
    .next-piece-card {
        grid-column: span 2;
    }
    .game-center {
        order: 1;
    }
    .sidebar-right {
        order: 3;
        width: 100%;
        max-width: 600px;
    }
    .leaderboard-card {
        max-height: 350px;
    }
}
@media (max-width: 768px) {
    .container {
        padding: var(--gap-md);
    }
    .game-title {
        font-size: 3rem;
    }
    .controls-info {
        display: none;
    }
    .mobile-controls {
        display: flex;
    }
    #tetris {
        max-width: 100%;
        height: auto;
    }
    .stat-card {
        padding: var(--gap-sm);
    }
    .stat-value {
        font-size: 1.5rem;
    }
    .leaderboard-card {
        max-height: 300px;
    }
}
@media (max-width: 480px) {
    .game-header {
        margin-bottom: var(--gap-md);
    }
    .game-title {
        font-size: 2.5rem;
    }
    .tagline {
        font-size: 0.75rem;
    }
    .sidebar-left {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--gap-sm);
    }
    .control-btn {
        min-width: 65px;
        height: 65px;
    }
    .control-btn svg {
        width: 28px;
        height: 28px;
    }
    .modal-box {
        padding: var(--gap-lg);
    }
    .modal-title {
        font-size: 1.25rem;
    }
}