:root {
    --bg-color: #fdfd96;
    /* Pastel Yellow */
    --text-color: #333333;
    /* Darker text for contrast on light bg */
    --primary-color: #646cff;
    --primary-hover: #535bf2;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    margin: 0;
    overflow: hidden;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    user-select: none;
    cursor: default;
}

#game-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    cursor: default;
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
    /* Allow clicks to pass through to 3D canvas when not on UI */
    display: flex;
    justify-content: center;
    align-items: center;
}

.screen {
    pointer-events: auto;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 2rem 3rem;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    text-align: center;
    transition: opacity 0.3s ease, transform 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hidden {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.95);
    display: none !important;
    /* Force hide for layout */
}

h1 {
    font-size: 3rem;
    background: linear-gradient(135deg, #333 0%, #000 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}

button {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: #fff;
    /* Ensure white text on dark buttons */
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s;
}

button:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(100, 108, 255, 0.3);
}

.grid-buttons {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 10px;
}

.player-input-row {
    display: flex;
    gap: 10px;
    align-items: center;
    text-align: left;
}

.color-indicator {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

input[type="text"] {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    outline: none;
    font-family: inherit;
}

input[type="text"]:focus {
    border-color: var(--primary-color);
}

.grid-buttons button,
.primary-btn,
.secondary-btn {
    background: linear-gradient(135deg, #444 0%, #000 100%);
    border: 1px solid rgba(0, 0, 0, 0.2);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.grid-buttons button:hover,
.primary-btn:hover,
.secondary-btn:hover {
    background: linear-gradient(135deg, #555 0%, #111 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

.primary-btn {
    /* Kept for specificity if needed, but styles merged above */
    font-weight: bold;
}

#game-hud {
    background: none;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
    width: 100%;
    height: 100%;
    justify-content: space-between;
    padding: 20px;
    pointer-events: none;
}

.hud-top {
    pointer-events: auto;
    background: var(--glass-bg);
    backdrop-filter: blur(5px);
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 1.2rem;
    font-weight: bold;
}

#win-modal {
    pointer-events: auto;
    background: rgba(0, 0, 0, 0.85);
    padding: 40px;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid var(--primary-color);
}