:root {
    --bg: #14151a;
    --panel: #1d1f26;
    --text: #e6e2da;
    --muted: #8b8fa0;
    --accent: #e8b04b;
    --border: #2c2f3a;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    display: flex;
    height: 100vh;
    font-family: system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
}

#panel {
    width: 320px;
    flex: none;
    overflow-y: auto;
    padding: 20px;
    background: var(--panel);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 14px;
}

#panel h1 {
    margin: 0;
    font-size: 26px;
    letter-spacing: 1px;
}

.tagline {
    margin: 2px 0 0;
    color: var(--muted);
    font-size: 13px;
}

#presets {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

#presets a {
    -webkit-tap-highlight-color: transparent;
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 12px;
    color: var(--accent);
    text-decoration: none;
}

/* Hover only on devices that really hover; on touch the style would
   stick to the last-tapped chip. */
@media (hover: hover) {
    #presets a:hover {
        border-color: var(--accent);
    }
}

#presets a.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #1a1408;
}

#controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

fieldset {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

legend {
    padding: 0 6px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--muted);
}

.control {
    display: grid;
    grid-template-columns: 1fr 52px;
    align-items: center;
    gap: 2px 8px;
    font-size: 13px;
}

.control label {
    grid-column: 1;
}

.control output {
    grid-column: 2;
    text-align: right;
    font-variant-numeric: tabular-nums;
    color: var(--accent);
}

.control.disabled {
    opacity: 0.35;
}

.control input[type="range"] {
    grid-column: 1 / -1;
    width: 100%;
    accent-color: var(--accent);
    margin: 0;
}

.control input[type="checkbox"] {
    grid-column: 2;
    justify-self: end;
    accent-color: var(--accent);
}

.control select {
    grid-column: 2;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 4px;
}

.actions {
    display: flex;
    gap: 8px;
}

.actions button {
    flex: 1;
    padding: 10px;
    font-size: 14px;
    border: none;
    border-radius: 8px;
    background: var(--accent);
    color: #1a1408;
    cursor: pointer;
}

.actions button:disabled {
    opacity: 0.4;
    cursor: default;
}

#status {
    margin: 0;
    font-size: 12px;
    color: var(--muted);
    min-height: 1.2em;
}

footer {
    margin-top: auto;
    font-size: 11px;
    color: var(--muted);
}

footer a {
    color: var(--muted);
}

#viewport {
    flex: 1;
    position: relative;
}

#canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

#menu-toggle {
    display: none;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 20;
    width: 44px;
    height: 44px;
    font-size: 20px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--panel);
    color: var(--text);
    cursor: pointer;
}

@media (max-width: 700px) {
    #menu-toggle {
        display: block;
    }

    #panel {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        width: min(320px, 85vw);
        z-index: 10;
        padding-top: 68px;
        transform: translateX(-100%);
        transition: transform 0.25s ease;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.5);
    }

    #panel.open {
        transform: translateX(0);
    }
}