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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #0a0a0a;
    color: #e0e0e0;
    overflow: hidden;
}

.container {
    display: flex;
    flex-direction: row;
    height: 100vh;
    padding: 20px;
    gap: 20px;
}

.left-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
    min-width: 0;
    position: relative;
}

.controls-panel {
    width: 350px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
}

header h1 {
    font-size: 2rem;
    font-weight: 300;
    letter-spacing: 2px;
    margin-bottom: 5px;
}

header p {
    font-size: 0.9rem;
    color: #888;
    font-style: italic;
}

#glCanvas {
    flex: 1;
    width: 100%;
    min-height: 0;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    padding: 20px;
    background: rgba(20, 20, 20, 0.8);
    border-radius: 8px;
    backdrop-filter: blur(10px);
    height: 100%;
    overflow-y: auto;
}

.controls h3 {
    grid-column: 1 / -1;
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 1.5px;
    color: #fff;
    margin-top: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #333;
}

/* Calendar Styles */
.calendar {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 200px;
    background: rgba(20, 20, 20, 0.9);
    border-radius: 8px;
    padding: 15px;
    backdrop-filter: blur(10px);
    z-index: 10;
}

.calendar-header h2 {
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 1px;
    margin-bottom: 10px;
    text-align: center;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
}

.calendar-day-label {
    font-size: 0.7rem;
    text-align: center;
    color: #666;
    padding: 4px 0;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    background: rgba(255, 255, 255, 0.05);
}

.calendar-day.empty {
    background: transparent;
    cursor: default;
}

.calendar-day.active {
    background: rgba(255, 255, 255, 0.15);
    font-weight: 600;
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.calendar-day:not(.empty):hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

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

.control-group label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #aaa;
}

.control-group input[type="range"] {
    width: 100%;
    height: 4px;
    background: #333;
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.1s;
}

.control-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
    border: none;
    transition: transform 0.1s;
}

.control-group input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
}

.control-group span {
    font-size: 0.9rem;
    color: #fff;
    font-weight: 500;
    text-align: right;
}