/* Basic Reset & Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box; /* Keep this global rule */
}

body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
    padding: 10px; /* Add padding for smaller screens */
}

/* Game Container Layout */
.game-container {
    display: flex;
    flex-direction: column; /* Default: mobile portrait */
    align-items: center;
    gap: 10px; /* Reduced from 20px */
    width: 100%;
    max-width: 900px; /* Limit max width on desktop */
    padding: 10px;
}

#game-board {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    /* Make board size relative to viewport width/height */
    width: min(85vw, 45vh); /* Reduced from 90vw, 50vh */
    height: min(170vw, 90vh); /* Reduced from 180vw, 100vh */
    max-width: 280px; /* Reduced from 300px */
    max-height: 560px; /* Reduced from 600px */
    border: 2px solid #333;
    aspect-ratio: 4 / 8; /* 4 columns / 8 rows */
    box-sizing: content-box; /* Changed from border-box to content-box */
    position: relative;
}

.cell {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative; /* For piece positioning/highlights */
    aspect-ratio: 1 / 1; /* Ensure cells are square */
    /* box-sizing: border-box; */ /* Included in global '*' */
}

.cell.win-path {
    background-color: rgba(255, 215, 0, 0.7) !important; /* Gold highlight with increased opacity */
}

.cell.win-path-second {
    background-color: rgba(0, 191, 255, 0.7) !important; /* Blue highlight with increased opacity */
}

/* Ensure these have higher specificity than the checkerboard pattern */
.cell.light.win-path,
.cell.dark.win-path {
    background-color: rgba(255, 215, 0, 0.7) !important;
}

.cell.light.win-path-second,
.cell.dark.win-path-second {
    background-color: rgba(0, 191, 255, 0.7) !important;
}

/* Checkerboard Pattern */
.cell.light { background-color: #e0e0e0; }
.cell.dark { background-color: #a0a0a0; }

/* Pieces */
.cell img.piece {
    width: 85%;
    height: 85%;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
    cursor: pointer;
    border-radius: 50%;
    transition: transform 0.1s ease-out, box-shadow 0.1s ease-out;
}

.cell.selected img.piece {
    transform: scale(1.1);
    box-shadow: 0 0 10px 3px gold;
}

/* Highlights */
.cell.legal-move::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30%;
    height: 30%;
    background-color: rgba(0, 255, 0, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none; /* Allow clicks through the highlight */
}
.cell.legal-move.swap-target::after {
     background-color: rgba(255, 165, 0, 0.6); /* Orange for swap */
}

.cell.win-path {
    background-color: rgba(255, 215, 0, 0.5) !important; /* Gold highlight */
}

/* Controls */
#controls {
    display: flex;
    flex-direction: row; /* Default: mobile portrait */
    justify-content: center;
    gap: 10px; /* Reduced from 15px */
    padding: 8px; /* Reduced from 10px */
    background-color: #d0d0d0;
    border-radius: 8px;
    width: 85%; /* Reduced from 90% */
    max-width: 280px; /* Match board width roughly */
    align-items: center; /* Added to align items vertically */
}

#controls button {
    width: 36px; /* Reduced from 40px */
    height: 36px; /* Reduced from 40px to maintain 1:1 ratio */
    background: #f8f8f8;
    border: 1px solid #ccc;
    border-radius: 50%;
    padding: 6px; /* Reduced from 8px */
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.2s ease;
}

#controls button:hover:not(:disabled) {
    background-color: #e8e8e8;
}

#controls button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#controls button img {
    width: 22px; /* Reduced from 24px */
    height: 22px; /* Reduced from 24px */
    display: block;
}

.rules-icon {
    height: 1em;
    width: 1em;
}

/* Overlays */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: none; /* Hidden by default */
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.overlay.active {
    display: flex;
}

.overlay-content {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    position: relative;
    max-width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.overlay-content h2 {
    margin-top: 0;
    margin-bottom: 15px;
    text-align: center;
    color: #333;
}

.overlay-content ul {
    list-style-position: inside;
    padding-left: 0;
}
.overlay-content li {
    margin-bottom: 8px;
    color: #555;
}

.close-overlay-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.close-overlay-btn img {
    width: 24px;
    height: 24px;
    display: block;
}

/* History List */
#history-list {
    max-height: 60vh;
    overflow-y: auto;
}

#history-list div {
    padding: 8px 12px;
    border-bottom: 1px solid #eee;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

#history-list div:hover {
    background-color: #f0f0f0;
}

#history-list div:last-child {
    border-bottom: none;
}

.history-move {
    cursor: pointer;
    padding: 5px;
    transition: background-color 0.2s;
}

.history-move:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.history-move.selected-move {
    background-color: rgba(255, 255, 255, 0.2);
    font-weight: bold;
}

/* Win Overlay Specific */
#win-overlay .overlay-content {
    text-align: center;
}

#ai-spinner-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: auto;
    height: auto;
    align-items: center;
    justify-content: center;
    padding-top: 0;
    color: white;
    background: transparent;
    pointer-events: none;
    z-index: 1000;
}

#ai-spinner-overlay .spinner-content {
    background: rgba(0, 0, 0, 0.8);
    padding: 15px;
    border-radius: 8px;
    border: 2px solid white;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

.spinner-text {
    font-size: 0.9em;
    color: #ffffff;
}

/* Score Display */
#score-display {
    display: flex;
    flex-direction: column;  
    gap: 5px;
    font-size: 0.9em;
    min-width: 36px; /* Reduced from 40px */
    justify-content: center;
    height: 36px; /* Match new button height */
}

.score-item {
    display: flex;
    gap: 3px;
    align-items: center;
    justify-content: center;
    line-height: 1.2; /* Adjusted for better vertical spacing */
    height: 18px; /* Half of new parent height */
}

.move-counter {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 14px;
}

#game-board {
    position: relative; /* Ensure move counter is positioned relative to board */
}

.score-display {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 10px;
    border-radius: 5px;
    font-size: 14px;
}

/* Jam Link */
.jam-link {
    font-family: 'system-ui', sans-serif;
    position: fixed;
    bottom: -1px;
    right: -1px;
    padding: 7px;
    font-size: 14px;
    font-weight: bold;
    background: #fff;
    color: #000;
    text-decoration: none;
    border-top-left-radius: 12px;
    z-index: 10000;
    border: 1px solid #fff;
}

.github-link {
    font-family: 'system-ui', sans-serif;
    position: fixed;
    bottom: -1px;
    left: -1px;
    padding: 7px;
    font-size: 14px;
    font-weight: bold;
    background: #fff;
    color: #000;
    text-decoration: none;
    border-top-right-radius: 12px;
    z-index: 10000;
    border: 1px solid #fff;
}

/* Adjust link position in portrait mode for phones */
@media (max-width: 600px) {
    .jam-link {
        bottom: 0px; /* Adjust this value based on your controls height */
    }
    .github-link {
        bottom: 0px; /* Adjust this value based on your controls height */
    }    
}

/* --- Responsiveness --- */

/* Mobile Landscape & Desktop/Widescreen */
@media (min-width: 600px) and (min-aspect-ratio: 1/1), (min-width: 768px) {
    .game-container {
        flex-direction: row; /* Side-by-side */
        align-items: flex-start;
        justify-content: center;
    }

    #game-board {
        /* Adjust size constraints if needed */
         width: min(40vw, 350px);
         height: min(80vw, 700px);
         max-width: 350px;
         max-height: 700px;
    }

    #controls {
        flex-direction: column; /* Vertical buttons */
        width: auto; /* Fit content */
        max-width: none;
        padding: 15px 10px;
    }
}

/* Larger Screens - More spacing if needed */
@media (min-width: 1024px) {
    .game-container {
        gap: 30px;
    }
     #controls {
        gap: 20px;
    }
}

/* Difficulty Options in Info Overlay */
.difficulty-options {
    margin-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.difficulty-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #555;
}

.difficulty-item img {
    width: 20px;
    height: 20px;
}

/* MCTS Configuration Overlay */
.mcts-controls {
    display: flex;
    flex-direction: column;
    gap: 20px;
    min-width: 300px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-weight: bold;
    color: #333;
    margin-bottom: 4px;
}

.control-group input[type="range"] {
    width: 100%;
    margin: 4px 0;
}

.control-group input[type="checkbox"] {
    margin-right: 8px;
    transform: scale(1.2);
}

.control-group span:not(.help-text) {
    font-weight: bold;
    color: #2c3e50;
    background: #ecf0f1;
    padding: 2px 8px;
    border-radius: 4px;
    display: inline-block;
    min-width: 40px;
    text-align: center;
}

.help-text {
    font-size: 0.85em;
    color: #666;
    font-style: italic;
    line-height: 1.3;
}

.control-group button {
    padding: 10px 20px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: background-color 0.2s;
}

.control-group button:hover {
    background: #2980b9;
}

.control-group button:active {
    background: #21618c;
}

.control-group select {
    padding: 8px 12px;
    border: 2px solid #bdc3c7;
    border-radius: 6px;
    background: white;
    font-size: 14px;
    color: #2c3e50;
    cursor: pointer;
    transition: border-color 0.2s;
}

.control-group select:focus {
    outline: none;
    border-color: #3498db;
}

.control-group select:hover {
    border-color: #7f8c8d;
}

/* MCTS-only controls - shown/hidden based on AI difficulty */
.mcts-only {
    transition: opacity 0.3s ease, max-height 0.3s ease;
    overflow: hidden;
}

.mcts-only.disabled {
    opacity: 0.5;
    max-height: 0;
    pointer-events: none;
    margin: 0;
    padding: 0;
}