:root {
    --bg-dark: #111;
    --bg-medium: #222;
    --bg-light: #333;
    --text-muted: #aaa;
    --border-color: #aaa;
    --accent-color: #a33c2c;
    --board-light: #eeeeee;
    --board-dark: #915355;
}

body {
    background: var(--bg-dark);
    padding-top: 15px;
    margin: 0;
}

.no-select {
    user-select: none;
}

#main-container {
    display: flex;
    justify-content: center;
    gap: 20px;
}

#board-container {
    display: flex;
    gap: 10px;
}

#board {
    position: relative;
    margin: auto;
    color: var(--text-muted);
}

#dragged {
    position: absolute;
    visibility: hidden;
}

#eval-bar-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 40px;
    height: 480px;
    background: var(--bg-medium);
    border-radius: 8px;
    position: relative;
    padding-top: 15px;
}

#eval-bar {
    width: 20px;
    height: 400px;
    background: linear-gradient(to top, #fff 0%, #fff 50%, #000 50%, #000 100%);
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

#eval-text {
    font-family: monospace;
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 5px;
}

#move-list {
    font-family: monospace;
    color: var(--text-muted);
    font-size: 14px;
    padding: 10px;
    background: var(--bg-medium);
    border-radius: 8px;
    overflow-y: auto;
}

#move-list-content {
    background: var(--bg-medium);
    color: var(--text-muted);
    width: 200px;
    height: 500px;
    font-size: 22px;
    resize: none;
    border: none;
}

.btn {
    background: var(--bg-medium);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    padding: 5px 10px;
    cursor: pointer;
    font-size: 24px;
    border-radius: 8px;
}

.btn:active {
    background: var(--bg-light);
    transform: scale(0.98);
}

.vertical-btn-group {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 24px;
}

.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    padding: 20px;
    z-index: 1000;
    border-radius: 8px;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

#fen-popup {
    font-size: 12px;
}

#fen-input {
    width: 500px;
    padding: 15px;
    background: var(--bg-light);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    margin-bottom: 10px;
    font-size: 20px;
    border-radius: 3px;
}

#fen-buttons {
    display: flex;
    gap: 10px;
    margin-top: 10px;
    justify-content: right;
}

#game-over-popup {
    text-align: center;
    min-width: 250px;
    color: var(--text-muted);
    font-family: sans-serif;
}

#game-over-title {
    margin-top: 0;
    font-size: 24px;
}

#game-over-body {
    font-size: 18px;
    margin: 20px 0;
}

.text-muted {
    color: var(--text-muted);
}

.text-mono {
    font-family: monospace;
}

.title {
    font-family: sans-serif;
    text-align: center;
    color: var(--text-muted);
}

#moves-header {
    font-weight: bold;
    margin-bottom: 10px;
    font-size: 28px;
}

#loading-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.2s;
}

#loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

#loading-text {
    color: var(--text-muted);
    font-family: sans-serif;
    font-size: 1.5em;
}