:root {
    color-scheme: dark;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: #05070f;
    --panel-bg: rgba(3, 7, 20, 0.85);
    --panel-border: rgba(255, 255, 255, 0.08);
    --accent: #6cf0ff;
}

* {
    box-sizing: border-box;
}

body,
html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background: #05070f;
}

.app {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.viewport {
    position: absolute;
    inset: 0;
}

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

#fractalCanvas {
    background: #000;
    cursor: grab;
}

#fractalCanvas.dragging {
    cursor: grabbing;
}

#zoomOverlay {
    pointer-events: none;
}

.controls {
    position: absolute;
    top: 1rem;
    left: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 0.5rem;
    backdrop-filter: blur(4px);
    color: #fff;
    min-width: 200px;
}

.controls-body {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.controls.collapsed .controls-body {
    display: none;
}

.control-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.5rem;
}

button,
select {
    padding: 0.45rem 0.6rem;
    border-radius: 0.4rem;
    border: 1px solid var(--panel-border);
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    font-size: 0.95rem;
    transition: border-color 0.2s ease, color 0.2s ease;
}

button:hover,
select:hover,
button:focus-visible,
select:focus-visible {
    border-color: var(--accent);
    outline: none;
    color: var(--accent);
}

.toggle.active {
    border-color: var(--accent);
    background: rgba(108, 240, 255, 0.15);
    color: var(--accent);
}

.collapse-btn {
    align-self: flex-end;
    border: 1px solid var(--panel-border);
    border-radius: 999px;
    padding: 0.25rem 0.8rem;
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    cursor: pointer;
    font-size: 0.8rem;
}

.controls.collapsed {
    padding: 0.6rem 0.8rem;
    min-width: unset;
}


.inline {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    .controls {
        min-width: unset;
        width: calc(100% - 2rem);
        left: 50%;
        transform: translateX(-50%);
    }

    .control-row {
        grid-template-columns: 1fr;
    }
}