/* Base (Dark Mode Default) */
body {
    margin: 0;
    font-family: monospace;
    background-color: #121212;
    color: #ffffff;
    text-align: center;
    padding: 1rem;
    max-width: 1200px; /* Restrict the maximum width */
    margin: 0 auto; /* Center the content */
    padding: 1rem; /* Add padding for spacing */
}

header {
    margin-bottom: 1rem;
}

header h1 {
    font-size: 1.8rem;
    margin: 0;
}

button {
    margin: 0.25rem;
    padding: 0.5rem 1rem;
    font-weight: bold;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    background-color: #333;
    color: #fff;
}

button:hover {
    background-color: #444;
}

.controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.controls select,
.controls input[type="range"] {
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid #444;
    border-radius: 5px;
    background-color: #222;
    color: #fff;
}

.controls select:hover,
.controls input[type="range"]:hover {
    background-color: #333;
}

.controls select,
.controls button {
    background-color: #333;
    color: #fff;
    border: 1px solid #444;
    border-radius: 5px;
    padding: 0.5rem 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.controls select:hover,
.controls button:hover {
    background-color: #444;
}

#grid {
    display: grid;
    grid-template-columns: repeat(18, 1fr); /* Use flexible column sizing */
    grid-template-rows: repeat(18, 1fr);    /* Use flexible row sizing */
    gap: 1px;
    background-color: #222;
    width: 540px; /* Fixed width for consistent layout */
    height: 540px; /* Fixed height for consistent layout */
    padding: 1rem;
    border-radius: 8px;
    margin: 0 auto; /* Center the grid */
}

/* Ensure grid cells have consistent size */
.grid-cell {
    background-color: #444;
    border: 1px solid #555;
    transition: background-color 0.3s ease;
}

.grid-cell.start {
    background-color: #28a745;
}

.grid-cell.end {
    background-color: #dc3545;
}

.grid-cell.wall {
    background-color: #343a40;
}

.grid-cell.visited {
    background-color: #17a2b8;
}

.grid-cell.path {
    background-color: #ffc107;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    margin-left: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.theme-toggle {
    margin-top: 1rem;
    background-color: #007bff;
    color: white;
    font-weight: bold;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    padding: 0.5rem 1rem;
    transition: background-color 0.3s ease;
}

.theme-toggle:hover {
    background-color: #0056b3;
}

footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.9rem;
    color: #888;
}

footer a {
    color: #00bcd4;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Light Mode Overrides */
body.light {
    background-color: #ffffff;
    color: #1a1a1a;
}

body.light #grid {
    background-color: #f4f4f4;
}

body.light .grid-cell {
    background-color: #ddd;
    border-color: #ccc;
}

body.light .grid-cell.start {
    background-color: #28a745;
}

body.light .grid-cell.end {
    background-color: #dc3545;
}

body.light .grid-cell.wall {
    background-color: #333;
}

body.light .grid-cell.visited {
    background-color: #17a2b8;
}

body.light .grid-cell.path {
    background-color: #ffc107;
}

body.light button {
    background-color: #dddbdb;
    color: #1a1a1a;
}

body.light button:hover {
    background-color: #ccc;
}

body.light .controls select,
body.light .controls button {
    background-color: #f4f4f4;
    color: #1a1a1a;
    border: 1px solid #ccc;
}

body.light .controls select:hover,
body.light .controls button:hover {
    background-color: #e0e0e0;
}

body.light footer {
    color: #555;
}

body.light footer a {
    color: #007bff;
}