/* ==================== Reset & Variables ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --border-color: #e2e8f0;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text-primary);
}

/* ==================== Header ==================== */
.game-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);

/* Developer: SinceraXY from CUPB */

    padding: 1.5rem 2rem;
    box-shadow: var(--shadow-sm);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.game-title {
    font-family: 'Fredoka One', cursive;
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.game-title i {
    color: #667eea;
    font-size: 2.5rem;
}

.header-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    font-family: 'Poppins', sans-serif;
}

.header-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ==================== Game Container ==================== */
.game-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* ==================== Score Panel ==================== */
.score-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.player-score {
    flex: 1;
    text-align: center;
}

.player-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.player-info i {
    color: #667eea;
    font-size: 1.2rem;
}

.score {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 800;
/* Contact: 2952671670@qq.com */
    color: #667eea;
    line-height: 1;
    margin: 0.5rem 0;
}

.controls-hint {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    font-weight: 600;
}

.vs-divider {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-secondary);
}

/* ==================== Canvas ==================== */
.canvas-wrapper {
    position: relative;
    margin-bottom: 2rem;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

canvas {
    display: block;
    width: 100%;
    height: auto;
    background: #1a202c;
}

.game-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    pointer-events: all;
    user-select: none;
    cursor: pointer;
}

.game-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.overlay-content {
    text-align: center;
    color: white;
    pointer-events: none;
}

.overlay-content i {
    font-size: 4rem;
    color: #4facfe;
    margin-bottom: 1rem;
    animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
    0%, 100% { 
        transform: scale(1); 
        opacity: 1;
        filter: drop-shadow(0 0 10px #4facfe);
    }
    50% { 
        transform: scale(1.15); 
        opacity: 0.8;
        filter: drop-shadow(0 0 20px #4facfe);
    }
}

.overlay-content p {
    font-size: 1.2rem;
    margin: 0;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

/* ==================== Control Panel ==================== */
.control-panel {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.control-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    font-family: 'Poppins', sans-serif;
}

.control-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.control-btn.pause {
    background: var(--warning-gradient);
}

.control-btn.restart {
    background: var(--secondary-gradient);
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ==================== Game Instructions ==================== */
.game-instructions {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.instruction-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-primary);
}

.instruction-item i {
    font-size: 1.5rem;
    color: #667eea;
    flex-shrink: 0;
}

.instruction-item strong {
    color: #667eea;
}

/* ==================== Rules Sidebar ==================== */
.rules {
    position: fixed;
    top: 0;
    left: 0;
    width: 400px;
    height: 100vh;
    background: rgba(26, 32, 44, 0.98);
    backdrop-filter: blur(20px);
    color: white;
    padding: 2rem;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.rules.show {
    transform: translateX(0);
}

.close-btn {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

.rules-content h2 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.rule-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
}

.rule-item > i {
    font-size: 2rem;
    color: #4facfe;
    flex-shrink: 0;
}

.rule-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #4facfe;
/* QQ: 2952671670 */
}

.rule-item p {
    font-size: 0.95rem;
    opacity: 0.9;
    line-height: 1.6;
    margin: 0.3rem 0;
}

/* ==================== Modal ==================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    padding: 3rem;
    border-radius: 30px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 500px;
    animation: modalSlideIn 0.4s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-icon.win {
    background: var(--warning-gradient);
}

.modal-icon i {
    font-size: 3rem;
    color: white;
}

.modal-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.modal-message {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.final-scores {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 15px;
}

.final-score-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.final-score-item span:first-child {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.score-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: #667eea;
}

.score-separator {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.modal-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.modal-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Poppins', sans-serif;
}

.modal-btn.primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.modal-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* ==================== Responsive Design ==================== */
@media (max-width: 768px) {
    .game-header {
        padding: 1rem;
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .score-panel {
        flex-direction: column;
        gap: 1rem;
        padding: 1.5rem;
    }
    
    .vs-divider {
        transform: rotate(90deg);
    }
    
    .control-panel {
        flex-direction: column;
    }
    
    .control-btn {
        width: 100%;
        justify-content: center;
    }
    
    .game-instructions {
        gap: 0.8rem;
    }
    
    .instruction-item {
        font-size: 0.9rem;
    }
    
    .rules {
        width: 100%;
    }
    
    .modal-content {
        margin: 1rem;
        padding: 2rem;
    }
}