:root {
    --bg: #f4f1ea;
    --panel: #fffdf8;
    --text: #1f2433;
    --muted: #6b6f7d;
    --accent: #2f4fd0;
    --accent-soft: #e5e9fb;
    --border: #e2ddd2;
    --dot: #d9d3c5;
    --heading-font: "Unbounded", system-ui, sans-serif;
    --subheading-font: "Outfit", system-ui, sans-serif;
}

* {
    box-sizing: border-box;
}

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

#panel {
    order: 2;
    width: 340px;
    flex: none;
    overflow-y: auto;
    padding: 24px 22px;
    background: var(--panel);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

#panel h1 {
    margin: 0;
    font-family: var(--heading-font);
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--accent);
}

.tagline {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.4;
}

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

fieldset {
    margin: 0;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 12px 14px 14px;
    background: var(--bg);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

legend {
    float: left;
    width: 100%;
    padding: 0;
    margin-bottom: 2px;
    font-family: var(--subheading-font);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--muted);
}

.control {
    display: grid;
    grid-template-columns: 1fr 76px;
    align-items: center;
    gap: 4px 8px;
    font-size: 14px;
}

.control label {
    grid-column: 1;
}

.control output {
    grid-column: 2;
    text-align: right;
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    color: var(--accent);
}

.control.disabled {
    opacity: 0.4;
}

.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;
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

.control select {
    grid-column: 2;
    font: inherit;
    background: var(--panel);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 4px 6px;
}

.control select.wide {
    grid-column: 1 / -1;
    width: 100%;
    padding: 8px 10px;
    font-size: 15px;
}

#facts {
    padding: 6px 14px 10px;
    border-radius: 14px;
    background: var(--accent-soft);
    font-size: 14px;
}

#facts table {
    width: 100%;
    border-collapse: collapse;
}

#facts td {
    padding: 3px 0;
}

#facts td:last-child {
    text-align: right;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

#facts .section td {
    padding-top: 10px;
    border-bottom: 1px solid rgba(47, 79, 208, 0.18);
    font-family: var(--subheading-font);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--muted);
}

#facts .section td:last-child {
    color: var(--accent);
    font-size: 14px;
}

#facts .current td {
    font-weight: 600;
    color: var(--accent);
}

#facts .dot {
    display: inline-block;
    width: 9px;
    height: 9px;
    margin-right: 8px;
    border-radius: 50%;
}

#facts .note {
    margin: 8px 0 0;
    font-size: 13px;
    color: var(--muted);
}

#facts:empty {
    display: none;
}

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

.actions button {
    flex: 1;
    padding: 11px;
    font: inherit;
    font-weight: 600;
    border: 1.5px solid var(--accent);
    border-radius: 999px;
    background: var(--panel);
    color: var(--accent);
    cursor: pointer;
}

.actions button {
    white-space: nowrap;
}

.actions button#download {
    background: var(--accent);
    color: #fff;
}

.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: 12px;
    line-height: 1.45;
    color: var(--muted);
}

footer p {
    margin: 0 0 6px;
}

footer .dedication {
    margin-top: 10px;
    font-style: italic;
    color: var(--text);
}

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

#viewport {
    flex: 1;
    position: relative;
    background-color: var(--bg);
    background-image: radial-gradient(var(--dot) 1px, transparent 1px);
    background-size: 22px 22px;
}

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

/* Shown while OpenSCAD renders. It fades in after a short delay so quick
   renders do not flash it. */
#loading {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 6;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 18px 10px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--panel);
    box-shadow: 0 4px 18px rgba(31, 36, 51, 0.14);
    font-family: var(--subheading-font);
    font-size: 15px;
    color: var(--text);
    transform: translate(-50%, -50%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, visibility 0s linear 0.2s;
}

#loading.on {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.2s ease 0.15s, visibility 0s linear 0s;
}

#viewport.busy canvas {
    opacity: 0.55;
    transition: opacity 0.2s ease 0.15s;
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2.5px solid var(--accent-soft);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@media (prefers-reduced-motion: reduce) {
    .spinner {
        animation: none;
        border-color: var(--accent);
    }
}

#tabs {
    position: absolute;
    top: 14px;
    left: 14px;
    right: 14px;
    z-index: 5;
    display: flex;
    gap: 6px;
    overflow-x: auto;
    scrollbar-width: none;
}

#tabs button {
    flex: none;
    padding: 8px 14px;
    font: inherit;
    font-size: 14px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--panel);
    color: var(--text);
    cursor: pointer;
    box-shadow: 0 1px 4px rgba(31, 36, 51, 0.08);
}

#figure-bar {
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 16px;
    z-index: 4;
    display: flex;
    align-items: center;
    gap: 10px;
    pointer-events: none;
}

#figure-name {
    margin: 0 0 0 6px;
    font-family: var(--subheading-font);
    font-size: clamp(20px, 3.2vw, 34px);
    font-weight: 600;
    line-height: 1.15;
    color: var(--text);
    opacity: 0.85;
}

.stepper {
    flex: none;
    display: flex;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--panel);
    box-shadow: 0 1px 4px rgba(31, 36, 51, 0.08);
    overflow: hidden;
    pointer-events: auto;
}

.stepper button {
    display: grid;
    place-items: center;
    width: 44px;
    height: 40px;
    padding: 0;
    border: none;
    background: none;
    color: var(--accent);
    cursor: pointer;
}

.stepper button + button {
    border-left: 1px solid var(--border);
}

@media (hover: hover) {
    .stepper button:hover {
        background: var(--accent-soft);
    }
}

#layers {
    position: absolute;
    top: 60px;
    left: 14px;
    right: 14px;
    z-index: 5;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

#layers[hidden] {
    display: none;
}

#layers button {
    padding: 5px 11px;
    font: inherit;
    font-size: 13px;
    border: 1px dashed var(--border);
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
}

#layers button[aria-pressed="false"] .dot {
    opacity: 0.3;
}

#layers button[aria-pressed="true"] {
    border-style: solid;
    border-color: var(--accent);
    background: var(--panel);
    color: var(--text);
}

#tabs .dot,
#layers .dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    margin-right: 7px;
    border-radius: 50%;
    vertical-align: 0;
    box-shadow: 0 0 0 1.5px #fff;
}

#tabs button[aria-selected="true"] {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.segmented {
    grid-column: 1 / -1;
    display: flex;
    padding: 3px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--panel);
}

.segmented button {
    flex: 1;
    padding: 5px 8px;
    font: inherit;
    font-size: 13px;
    border: none;
    border-radius: 999px;
    background: none;
    color: var(--muted);
    cursor: pointer;
}

.segmented button[aria-checked="true"] {
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 600;
}

.control[hidden] {
    display: none;
}

#menu-toggle {
    display: none;
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 20;
    width: 44px;
    height: 44px;
    font-size: 20px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--panel);
    color: var(--accent);
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(31, 36, 51, 0.12);
}

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

    #tabs {
        top: 16px;
        right: 66px;
    }

    #layers {
        top: 64px;
    }

    #panel {
        position: fixed;
        top: 0;
        bottom: 0;
        right: 0;
        width: min(340px, 88vw);
        z-index: 10;
        padding-top: 68px;
        transform: translateX(100%);
        transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    #panel.open {
        transform: translateX(0);
        box-shadow: -4px 0 24px rgba(31, 36, 51, 0.18);
    }
}