:root {
    --bg-color: #ffffff;
    --panel-bg: #f6f8fa;
    --border-color: #d0d7de;
    --text-primary: #24292f;
    --text-muted: #57606a;
    --neon-green: #1a7f37;
    --neon-amber: #b15c00;
    --tile-light: #f0f3f6;
    --tile-dark: #d8dee4;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0d1117;
        --panel-bg: #161b22;
        --border-color: #30363d;
        --text-primary: #c9d1d9;
        --text-muted: #8b949e;
        --neon-green: #00ff66;
        --neon-amber: #ffaa00;
        --tile-light: #21262d;
        --tile-dark: #161b22;
    }
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: system-ui, -apple-system, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px 10px;
    position: relative;
    transition: background-color 0.2s;
}

.help-link {
    position: absolute;
    top: 15px;
    right: 15px;
    color: var(--text-muted);
    border: 1.5px solid var(--text-muted);
    border-radius: 50%;
    width: 25px;
    height: 25px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 15px;
    font-weight: bold;
    text-decoration: none;
    transition: color 0.2s, border-color 0.2s;
    z-index: 100;
}

.help-link:hover {
    color: var(--text-primary);
    border-color: var(--text-primary);
}

.header {
    text-align: center;
    margin-bottom: 35px;
}

.main-title {
    font-size: 24px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.board {
    display: grid;
    grid-template-columns: repeat(8, min(65px, 11vw));
    grid-template-rows: repeat(8, min(65px, 11vw));
    border: 2px solid var(--border-color);
}

.tile {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.tile.light { background-color: var(--tile-light); }
.tile.dark { background-color: var(--tile-dark); }

.piece {
    font-size: min(32px, 6vw);
    z-index: 10;
}

.piece.taz { color: var(--neon-green); }
.piece.mega { color: var(--neon-amber); }

.tile.selected { background-color: rgba(0, 255, 102, 0.15) !important; }

.tile.valid-move::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--neon-green);
    opacity: 0.6;
}

.tile.valid-capture::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid var(--neon-green);
    border-radius: 50%;
}

.tile.meshed::before {
    content: '';
    position: absolute;
    top: 4px;
    left: 4px;
    right: 4px;
    bottom: 4px;
    border: 1px dashed var(--neon-green);
    border-radius: 4px;
    opacity: 0.5;
}

.tile.setup-selected {
    border: 2px solid var(--neon-green);
    background-color: rgba(0, 255, 102, 0.1) !important;
}

.sidebar {
    width: min(520px, 88vw);
    margin-top: 12px;
}

.panel {
    background-color: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px;
}

.panel.controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.score-group {
    display: flex;
    gap: 15px;
    align-items: center;
}

.action-group {
    display: flex;
    gap: 6px;
}

.select-field {
    background-color: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px;
    font-size: 11px;
}

.btn {
    background-color: var(--panel-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    text-transform: uppercase;
    width: 100%;
}

.btn.compact {
    width: auto;
    padding: 4px 8px;
}

.btn.primary {
    border-color: var(--neon-green);
    color: var(--neon-green);
}

.btn:hover:not(:disabled) { filter: brightness(0.9); }
.btn:disabled { opacity: 0.3; cursor: not-allowed; }

.score-text {
    font-weight: bold;
    font-size: 13px;
}

.taz { color: var(--neon-green); }
.mega { color: var(--neon-amber); }

.status {
    font-size: 11px;
    text-align: center;
    margin-top: 6px;
    color: var(--text-muted);
}

.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
}

.modal-content {
    background: var(--bg-color);
    color: var(--text-primary);
    margin: 5vh auto; 
    padding: 40px;
    width: 80%; 
    max-width: 800px;
    height: 80vh; 
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 20px;
    background: none; 
    border: none;
    color: var(--text-primary); 
    font-size: 2rem; 
    cursor: pointer;
}

/* Markdown Rendering Styles */
#readme-display { 
    line-height: 1.6; 
    font-size: 14px;
    color: var(--text-primary);
}

#readme-display h1, #readme-display h3 { 
    margin-top: 24px;
    margin-bottom: 12px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

#readme-display ul { margin-left: 20px; margin-bottom: 16px; }
#readme-display li { margin-bottom: 8px; }
#readme-display p { margin-bottom: 16px; }
#readme-display hr { border: 0; border-top: 1px solid var(--border-color); margin: 24px 0; }
#readme-display code { background: var(--panel-bg); padding: 2px 4px; border-radius: 4px; font-family: monospace; }