/* CSS Custom Properties untuk tema dan warna */
:root {
    --primary-color: #4361ee;
    --primary-dark: #3a56d4;
    --secondary-color: #f72585;
    --secondary-dark: #e51a75;
    --accent-x: #4361ee;
    --accent-o: #f72585;
    --background: #f8f9fa;
    --card-bg: rgba(255, 255, 255, 0.8);
    --text-color: #2c3e50;
    --text-light: #6c757d;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.2);
    --win-highlight: #ffd166;
    --glass-border: rgba(255, 255, 255, 0.18);
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --background: #121212;
    --card-bg: rgba(18, 18, 18, 0.8);
    --text-color: #f8f9fa;
    --text-light: #adb5bd;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --glass-border: rgba(255, 255, 255, 0.05);
}

/* Reset dan base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Nunito', sans-serif;
    background: var(--background);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    line-height: 1.6;
    transition: var(--transition);
    position: relative;
    overflow-x: hidden;
}

.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(var(--primary-color) 1px, transparent 1px),
        radial-gradient(var(--secondary-color) 1px, transparent 1px);
    background-position: 0 0, 25px 25px;
    background-size: 50px 50px;
    opacity: 0.1;
    animation: particlesMove 30s linear infinite;
}

@keyframes particlesMove {
    0% { background-position: 0 0, 25px 25px; }
    100% { background-position: 50px 50px, 75px 75px; }
}

/* Container utama */
.container {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    z-index: 1;
}

/* Header styles */
.header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--card-bg);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.header-controls {
    display: flex;
    gap: 0.5rem;
}

.control-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: var(--card-bg);
    color: var(--text-color);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}

.control-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Player Indicators */
.player-indicators {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    width: 100%;
    padding: 1rem;
    background: var(--card-bg);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
}

.player-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    transition: var(--transition);
    opacity: 0.6;
    transform: scale(0.95);
}

.player-indicator.active {
    opacity: 1;
    transform: scale(1);
    background: var(--card-bg);
    box-shadow: var(--shadow);
}

.player-x.active {
    border: 2px solid var(--accent-x);
}

.player-o.active {
    border: 2px solid var(--accent-o);
}

.player-icon {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.player-x .player-icon {
    color: var(--accent-x);
}

.player-o .player-icon {
    color: var(--accent-o);
}

.player-name {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.player-score {
    font-size: 1.2rem;
    font-weight: 700;
}

.vs-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-light);
}

/* Area info styles */
.info-area {
    width: 100%;
    font-size: 1.25rem;
    font-weight: 700;
    padding: 1rem;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}

/* Board styles - menggunakan CSS Grid untuk layout 3x3 */
.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 12px;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    position: relative;
}

/* Cell styles */
.cell {
    aspect-ratio: 1/1;
    background-color: var(--card-bg);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3.5rem;
    font-weight: 800;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
}

/* Hover effect untuk cell yang masih kosong */
.cell:not(.x):not(.o):not(.disabled):hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.15);
}

.cell:not(.x):not(.o):not(.disabled):hover::after {
    content: attr(data-current-player);
    position: absolute;
    font-size: 2rem;
    opacity: 0.3;
}

/* Style untuk X */
.cell.x {
    color: var(--accent-x);
    text-shadow: 0 0 15px rgba(67, 97, 238, 0.4);
}

/* Style untuk O */
.cell.o {
    color: var(--accent-o);
    text-shadow: 0 0 15px rgba(247, 37, 133, 0.4);
}

/* Style untuk cell yang sudah diisi atau game selesai */
.cell.disabled {
    cursor: not-allowed;
}

/* Style untuk cell yang menang */
.cell.win {
    animation: pulse 1s infinite;
}

/* Animasi untuk cell yang menang */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Winning line */
.win-line {
    position: absolute;
    background: var(--win-highlight);
    z-index: 2;
    border-radius: 4px;
    opacity: 0;
    transition: all 0.5s ease;
    box-shadow: 0 0 10px var(--win-highlight);
}

/* Kurangi animasi untuk pengguna yang memilih reduced motion */
@media (prefers-reduced-motion: reduce) {
    .cell, .info-area, .player-indicator {
        transition: none;
    }
    
    .cell.win {
        animation: none;
    }
}

/* Controls styles */
.controls {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--card-bg);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.control-group h3 {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.mode-buttons, .difficulty-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.mode-btn, .difficulty-btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 600;
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    cursor: pointer;
    background: transparent;
    color: var(--text-color);
    transition: var(--transition);
}

.mode-btn:hover, .difficulty-btn:hover {
    transform: translateY(-2px);
}

.mode-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.difficulty-btn.active {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.ai-difficulty {
    display: none;
}

.ai-difficulty.visible {
    display: flex;
}

/* Button styles */
.btn {
    padding: 0.85rem 1.5rem;
    font-size: 1rem;
    font-weight: 700;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.btn.primary {
    background: var(--primary-color);
    color: white;
}

.btn.primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(67, 97, 238, 0.3);
}

.btn.secondary {
    background: transparent;
    color: var(--text-color);
    border: 2px solid var(--glass-border);
}

.btn.secondary:hover {
    background: var(--card-bg);
    transform: translateY(-2px);
}

/* Scoreboard */
.scoreboard {
    width: 100%;
    padding: 1.5rem;
    background: var(--card-bg);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
}

.scoreboard h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--text-light);
}

.stats {
    display: flex;
    justify-content: space-around;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 800;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
}

.x-stat .stat-value {
    color: var(--accent-x);
}

.o-stat .stat-value {
    color: var(--accent-o);
}

.draw-stat .stat-value {
    color: var(--text-light);
}

/* Footer styles */
.footer {
    margin-top: 2rem;
    text-align: center;
    color: var(--text-light);
    opacity: 0.8;
}

.heart {
    color: var(--secondary-color);
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    5% { transform: scale(1.1); }
    10% { transform: scale(1); }
    15% { transform: scale(1.1); }
    20% { transform: scale(1); }
    100% { transform: scale(1); }
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 1.5rem;
    width: 90%;
    max-width: 500px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
    transform: translateY(-50px);
    transition: var(--transition);
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.modal-header h2 {
    font-size: 1.5rem;
}

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

.modal-body {
    margin-bottom: 1.5rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.modal-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.modal-btn.primary {
    background: var(--primary-color);
    color: white;
}

.modal-btn.secondary {
    background: transparent;
    color: var(--text-color);
    border: 2px solid var(--glass-border);
}

.modal-btn:hover {
    transform: translateY(-2px);
}

.rules {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 1.5rem 0;
}

.rule {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--card-bg);
    border-radius: 10px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}

.rule-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: 700;
}

/* Confetti canvas */
#confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 999;
}

/* Responsive styles untuk mobile */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .player-indicators {
        flex-direction: column;
        gap: 1rem;
    }
    
    .vs-text {
        display: none;
    }
    
    .board {
        max-width: 320px;
        grid-gap: 8px;
    }
    
    .cell {
        font-size: 2.5rem;
    }
    
    .controls {
        padding: 1rem;
    }
    
    .mode-buttons, .difficulty-buttons {
        flex-direction: column;
    }
    
    .stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .modal-footer {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        gap: 1rem;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .info-area {
        font-size: 1.1rem;
        padding: 0.75rem;
    }
    
    .board {
        max-width: 280px;
    }
    
    .cell {
        font-size: 2.2rem;
    }
    
    .btn {
        padding: 0.7rem 1.2rem;
        font-size: 0.9rem;
    }
}