:root {
    --bg: #060608;
    --panel: rgba(12, 12, 16, 0.85);
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.15);
    --text: #c8c8c8;
    --text-dim: #555;
    --text-bright: #e8e8e8;
    --white: #ffffff;
    --radius: 8px;
    --font: 'SF Mono', 'Fira Code', 'JetBrains Mono', 'Consolas', monospace;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

#canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

#canvas-container canvas {
    display: block;
}

#top-bar {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 10px 24px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    font-size: 11px;
    letter-spacing: 0.5px;
    z-index: 10;
    user-select: none;
}

#top-bar h1 {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--white);
}

#top-bar span {
    color: var(--text-dim);
}

#controls {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 18px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 10;
    user-select: none;
}

.divider {
    width: 1px;
    height: 20px;
    background: var(--border);
}

button {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 7px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font);
    font-size: 10px;
    letter-spacing: 1px;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

button:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-hover);
}

button:active {
    background: rgba(255, 255, 255, 0.12);
}

button.toggle {
    font-size: 9px;
}

button.toggle.active {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-bright);
}

.slider-group {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 10px;
    letter-spacing: 0.5px;
}

.slider-group label {
    color: var(--text-dim);
    white-space: nowrap;
    font-size: 9px;
    letter-spacing: 1px;
}

.slider-group span {
    color: var(--text-dim);
    font-size: 10px;
    white-space: nowrap;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 72px;
    height: 2px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 1px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 10px;
    height: 10px;
    background: var(--text);
    border-radius: 50%;
    cursor: pointer;
    transition: box-shadow 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.25);
}

input[type="range"]::-moz-range-thumb {
    width: 10px;
    height: 10px;
    background: var(--text);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

select {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 7px 28px 7px 12px;
    border-radius: 6px;
    font-family: var(--font);
    font-size: 10px;
    letter-spacing: 0.5px;
    cursor: pointer;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23888' fill='none' stroke-width='1.2'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
}

select:hover {
    border-color: var(--border-hover);
}

select option {
    background: #0c0c10;
    color: var(--text);
}

/* ── Responsive ── */

/* Tablet & small desktop */
@media (max-width: 768px) {
    #top-bar {
        gap: 16px;
        padding: 8px 16px;
    }

    #top-bar h1 {
        font-size: 12px;
    }

    #controls {
        gap: 10px;
        padding: 8px 14px;
    }

    input[type="range"] {
        width: 56px;
    }
}

/* Mobile */
@media (max-width: 480px) {
    #top-bar {
        gap: 12px;
        padding: 8px 14px;
        top: 10px;
    }

    #top-bar span {
        font-size: 9px;
    }

    #controls {
        bottom: 10px;
        gap: 8px;
        padding: 8px 12px;
    }

    .mobile-hide {
        display: none !important;
    }

    select {
        padding: 7px 24px 7px 8px;
        font-size: 9px;
    }
}

/* Very small phones */
@media (max-width: 360px) {
    #top-bar {
        gap: 8px;
        padding: 6px 10px;
        font-size: 9px;
    }

    #top-bar h1 {
        font-size: 11px;
        letter-spacing: 2px;
    }

    #controls {
        gap: 6px;
        padding: 6px 10px;
    }

    button {
        padding: 6px 10px;
        font-size: 9px;
    }
}