/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6c8de9;
    --secondary-color: #1c1274;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --background-color: #ffffff;
    --background-alt: #f9fafb;
    --border-color: #e5e7eb;
    --cell-size: 35px;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header and Navigation */
header {
    background-color: var(--background-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo a {
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Main Content */
main {
    flex: 1;
    padding: 2rem;
    background-color: var(--background-alt);
}

/* Game Container */
.game-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--background-color);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.game-container h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-size: 2.5rem;
}

/* Game Controls */
.game-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: var(--background-alt);
    border-radius: 8px;
}

.stats {
    display: flex;
    justify-content: space-around;
    gap: 1rem;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
}

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

#mine-count, #flag-count, #timer {
    color: var(--primary-color);
    min-width: 2rem;
    text-align: center;
}

.size-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.size-input-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.size-input-group label {
    font-weight: 600;
    color: var(--text-color);
    min-width: 100px;
}

.size-input-group input[type="range"] {
    flex: 1;
    min-width: 150px;
    max-width: 200px;
}

.size-input-group input[type="number"] {
    width: 60px;
    padding: 0.4rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background-color: var(--background-color);
    color: var(--text-color);
    text-align: center;
}

.size-input-group input[type="number"]:hover,
.size-input-group input[type="number"]:focus {
    border-color: var(--primary-color);
    outline: none;
}

#board-size-display {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 50px;
}

.btn-primary {
    padding: 0.75rem 2rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s ease;
    align-self: center;
}

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

.btn-primary:active {
    transform: scale(0.98);
}

/* Game Status */
.game-status {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    min-height: 2rem;
    padding: 0.5rem;
    border-radius: 6px;
}

.game-status.win {
    color: var(--success-color);
    background-color: rgba(16, 185, 129, 0.1);
}

.game-status.lose {
    color: var(--danger-color);
    background-color: rgba(239, 68, 68, 0.1);
}

/* Game Board */
.game-board {
    display: inline-grid;
    gap: 1px;
    background-color: var(--border-color);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    padding: 1px;
    margin: 0 auto;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
}

.cell {
    width: var(--cell-size);
    height: var(--cell-size);
    background-color: #bdbdbd;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    transition: background-color 0.1s ease;
    user-select: none;
}

.cell:hover:not(.revealed):not(.flagged) {
    background-color: #d4d4d4;
}

.cell.revealed {
    background-color: #e0e0e0;
    cursor: default;
}

.cell.flagged {
    background-color: #fbbf24;
}

.cell.mine {
    background-color: var(--danger-color);
    color: white;
}

.cell.mine-triggered {
    background-color: #dc2626;
    color: white;
}

/* Number colors */
.cell[data-count="1"] {
    color: #0000ff;
}

.cell[data-count="2"] {
    color: #008000;
}

.cell[data-count="3"] {
    color: #ff0000;
}

.cell[data-count="4"] {
    color: #000080;
}

.cell[data-count="5"] {
    color: #800000;
}

.cell[data-count="6"] {
    color: #008080;
}

.cell[data-count="7"] {
    color: #000000;
}

.cell[data-count="8"] {
    color: #808080;
}

/* Footer */
footer {
    background-color: var(--text-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

footer p {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .game-container {
        padding: 1rem;
    }

    .game-container h1 {
        font-size: 2rem;
    }

    .stats {
        justify-content: center;
    }

    .difficulty-selector {
        flex-direction: column;
    }

    :root {
        --cell-size: 30px;
    }
}

@media (max-width: 480px) {
    :root {
        --cell-size: 25px;
    }

    .game-container h1 {
        font-size: 1.5rem;
    }

    .stat {
        font-size: 0.9rem;
    }
}