style.css

/* Base layout */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f9f9f9;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    box-sizing: border-box;
    color: #333;
}

h1 {
    font-size: 26px;
    margin: 16px 0;
    color: #222;
    text-align: center;
}

/* Main container */
.game-container {
    border: 1px solid #e0e0e0;
    border-radius: 16px;
    padding: 24px;
    background-color: #fff;
    box-shadow: 0 8px 16px rgba(0,0,0,0.05);
    width: 100%;
    max-width: 880px;
}

/* Controls */
.controls {
    margin: 16px 0;
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

button {
    padding: 10px 18px;
    cursor: pointer;
    border: 1px solid #ccc;
    border-radius: 12px;
    font-weight: 500;
    font-size: 15px;
    background-color: #f5f5f5;
    color: #333;
    transition: all 0.2s ease-in-out;
}

button:hover {
    background-color: #eaeaea;
    transform: translateY(-1px);
}

.mode-active {
    border: 2px solid #007aff;
    background-color: #e6f0ff;
    color: #007aff;
}

/* Layout: grid + stats side by side */
.grid-and-stats {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
}

/* Grid wrapper */
.grid-wrapper {
    width: 420px;
    aspect-ratio: 1 / 1;
    background-color: #f0f0f0;
    border: 2px solid #d0d0d0;
    border-radius: 12px;
    box-shadow: inset 0 0 6px rgba(0,0,0,0.05);
    padding: 8px;
    display: flex;
    align-items: stretch;
    justify-content: stretch;
}

/* Grid */
.grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(15, 1fr);
    grid-template-rows: repeat(15, 1fr);
    gap: 2px;
    background-color: #ccc;
    border-radius: 8px;
}

/* Cells */
.cell {
    width: 100%;
    height: 100%;
    aspect-ratio: 1 / 1;
    background-color: #fff;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.cell:hover {
    background-color: #f0f0f0;
}

.cell.filled {
    background-color: #007aff;
    border: 1px solid #005bb5;
}

/* Stats on the right */
.stats {
    display: flex;
    flex-direction: column;
    gap: 14px;
    font-size: 16px;
    justify-content: center;
    min-width: 160px;
}

.stat-box {
    background-color: #f2f2f2;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid #ddd;
}

.stat-value {
    font-size: 20px;
    font-weight: 600;
    color: #444;
}