:root {
    --bg-color: #f8fafc;
    --text-primary: #0f172a;
    --accent-color: #ef4444;
    --accent-safe: #3b82f6;
    --cell-bg: #e2e8f0;
    --cell-bg-revealed: #ffffff;
    --border-color: rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background: #ffffff;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

header {
    text-align: center;
    width: 100%;
}

.back-btn {
    display: inline-block;
    color: var(--text-primary);
    text-decoration: none;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    opacity: 0.7;
    transition: opacity 0.3s;
    width: 100%;
    text-align: left;
    font-weight: 500;
}

.back-btn:hover {
    opacity: 1;
    color: var(--accent-safe);
}

h1 {
    font-weight: 800;
    letter-spacing: 2px;
}

h1 span {
    color: var(--accent-color);
}

.status-board {
    display: flex;
    gap: 2rem;
    align-items: center;
    background: rgba(0, 0, 0, 0.03);
    padding: 1rem 2rem;
    border-radius: 15px;
    width: 100%;
    justify-content: space-between;
}

.stat {
    font-size: 1.2rem;
    font-weight: 600;
}

button {
    padding: 0.5rem 1.5rem;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background: var(--text-primary);
    color: #ffffff;
}

.board-container {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
}

.grid {
    display: grid;
    grid-template-columns: repeat(10, 35px);
    grid-template-rows: repeat(10, 35px);
    gap: 2px;
    background-color: var(--border-color);
    border: 2px solid var(--border-color);
}

.cell {
    width: 35px;
    height: 35px;
    background-color: var(--cell-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 800;
    font-size: 1.2rem;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s;
}

.cell:hover {
    background-color: #cbd5e1;
}

.cell.revealed {
    background-color: var(--cell-bg-revealed);
    cursor: default;
}

.cell.bomb {
    background-color: #fee2e2;
    color: var(--accent-color);
}

.cell.flag {
    color: var(--accent-color);
}

/* Colors for numbers */
.num-1 { color: #2563eb; }
.num-2 { color: #16a34a; }
.num-3 { color: #dc2626; }
.num-4 { color: #9333ea; }
.num-5 { color: #7c2d12; }
.num-6 { color: #0d9488; }
.num-7 { color: #000000; }
.num-8 { color: #475569; }

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    z-index: 10;
}

.overlay.hidden {
    display: none;
}

.overlay h2 {
    font-size: 2rem;
    color: var(--text-primary);
}

@media (max-width: 500px) {
    .grid {
        grid-template-columns: repeat(10, 30px);
        grid-template-rows: repeat(10, 30px);
    }
    .cell {
        width: 30px;
        height: 30px;
        font-size: 1rem;
    }
}