/* Specific styles for the How to Play page */

.rules {
    background: var(--glass-bg);
    border-radius: 15px;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    margin-top: 2rem;
    color: var(--text-dim);
    line-height: 1.6;
}

.rules h2,
.rules h3 {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.rules ul {
    margin-bottom: 1.5rem;
    margin-left: 1.5rem;
}

.rules li {
    margin-bottom: 0.5rem;
}

/* Ensure theme toggle button position is correct on this page */
header .theme-toggle {
    position: fixed; /* Make the theme toggle sticky */
    top: 2rem;
    right: 2rem;
    z-index: 1000; /* Ensure it stays on top of other content */
}

/* Responsive adjustments for content */
@media (max-width: 768px) {
    .rules {
        padding: 1.5rem;
    }
    
    .rules h2 {
        font-size: 1.8rem;
    }

    .rules h3 {
        font-size: 1.3rem;
    }

    header .theme-toggle {
        top: 1rem;
        right: 1rem;
    }
}

/* Piece Demonstrations */
.piece-demonstrations {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.piece-demo {
    background: var(--glass-bg);
    border-radius: 15px;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.piece-demo h4 {
    color: var(--text-light);
    margin-bottom: 0.8rem;
    font-size: 1.5rem;
}

.piece-demo p {
    color: var(--text-dim);
    line-height: 1.5;
    margin-bottom: 1rem;
}

.small-board {
    width: 100%;
    max-width: 200px; /* Reduced from 250px for smaller boards */
    aspect-ratio: 1;
    border: 2px solid var(--primary-dark);
    margin-top: 1rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* Changed to 4x4 grid */
    grid-template-rows: repeat(4, 1fr);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
    position: relative;
}

.small-board .square {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: min(5vmin, 35px); /* Slightly larger font for better visibility */
    cursor: pointer;
    transition: background-color 0.3s ease;
    position: relative;
}

.small-board .square:hover {
    filter: brightness(1.1);
}

.small-board .square.highlight {
    background-color: var(--highlight); /* Revert to original highlight color background */
}

.small-board .square.highlight::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 15px; /* Smaller size for the dot */
    height: 15px; /* Smaller size for the dot */
    background-color: red; /* Red color for the dot */
    border-radius: 50%;
    opacity: 0.8; /* Slightly transparent dot */
}

.small-board .black-piece {
    color: var(--text-light);
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* Add a label for the board */
.small-board::before {
    content: attr(data-label);
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.9rem;
    color: var(--text-dim);
    white-space: nowrap;
}

.small-board .light {
    background-color: var(--board-light); /* Original light color */
    background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(0, 0, 0, 0.05) 100%); /* Subtle gradient */
}

.small-board .dark {
    background-color: var(--board-dark); /* Original dark color */
    background-image: linear-gradient(135deg, rgba(0, 0, 0, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%); /* Subtle gradient */
}

.small-board .highlight {
     background-color: var(--highlight); /* Revert to original highlight color background */
}

/* Responsive adjustments for demonstrations */
@media (max-width: 768px) {
    .piece-demo {
        padding: 1rem;
    }

    .piece-demo h4 {
        font-size: 1.3rem;
    }
}