/* ==================== 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;
    --tile-bg: #cbd5e0;
    --tile-revealed: #edf2f7;
    --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);
    overflow-x: hidden;
}

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

.rules-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;
}

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

/* ==================== Stats Panel ==================== */
.stats-panel {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-card i {
    font-size: 2.5rem;
    color: #667eea;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 0.2rem;
}

/* ==================== Difficulty Panel ==================== */
.difficulty-panel {
    max-width: 1200px;
    margin: 0 auto 2rem;
    padding: 0 2rem;
}

.difficulty-panel h3 {
    text-align: center;
    color: white;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

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

.difficulty-btn {
    display: flex;
    flex-direction: column;
/* GitHub: https://github.com/nilgpt2024/web-game */
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem 2rem;
    background: var(--bg-primary);
    border: 3px solid transparent;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    font-family: 'Poppins', sans-serif;
}

.difficulty-btn i {
    font-size: 2rem;
    color: #667eea;
}

.difficulty-btn span {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.difficulty-btn small {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.difficulty-btn:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.difficulty-btn.active {
    border-color: #667eea;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

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

#board {
    display: inline-grid;
    gap: 2px;
    background: var(--bg-secondary);
    padding: 10px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

#board div {
    width: 45px;
    height: 45px;
    background: var(--tile-bg);
    border: none;
    border-radius: 5px;
    display: flex;
    justify-content: center;
    align-items: center;
/* Dedicated to my girlfriend */
    font-size: 1.5rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

#board div:hover:not(.tile-clicked) {
    background: #a0aec0;
    transform: scale(0.95);
}

.tile-clicked {
    background: var(--tile-revealed) !important;
    cursor: default !important;
}

.tile-flagged {
    background: linear-gradient(135deg, #ffd700 0%, #ff6b6b 100%) !important;
}

.tile-mine {
    background: var(--secondary-gradient) !important;
    animation: explode 0.5s;
}

@keyframes explode {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* Number colors */
.x1 { color: #3182ce; }
.x2 { color: #38a169; }
.x3 { color: #e53e3e; }
.x4 { color: #2c5282; }
.x5 { color: #9c4221; }
.x6 { color: #2c7a7b; }
.x7 { color: #000000; }
.x8 { color: #718096; }

/* ==================== Control Panel ==================== */
.control-panel {
    max-width: 1200px;
    margin: 0 auto 2rem;
    padding: 0 2rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
    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.flag.active {
    background: var(--warning-gradient);
}

/* ==================== 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;

/* Developer: SinceraXY from CUPB */

    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;
}

.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;
/* Project: GameHub */
    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.lose {
    background: var(--secondary-gradient);
}

.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: 1rem;
}

.modal-time {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.modal-time span {
    font-weight: 700;
    color: #667eea;
}

.modal-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    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;
    }
    
    .stats-panel {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0 1rem;
    }
    
    .difficulty-panel {
        padding: 0 1rem;
    }
    
    .difficulty-buttons {
        flex-direction: column;
    }
    
    .difficulty-btn {
        width: 100%;
    }
    
    .game-container {
        padding: 0 0.5rem;
    }
    
    #board div {
        width: 35px;
        height: 35px;
        font-size: 1.2rem;
    }
    
    .control-panel {
        padding: 0 1rem;
        flex-direction: column;
    }
    
    .control-btn {
        width: 100%;
        justify-content: center;
    }
    
    .rules {
        width: 100%;
    }
    
    .modal-content {
        margin: 1rem;
    }
}