:root {
    color-scheme: dark;
    --bg: #07111f;
    --panel: rgba(11, 25, 43, 0.82);
    --border: rgba(255,255,255,.12);
    --text: #eef6ff;
    --muted: #9fb4ca;
    --accent: #59c8ff;
    --accent2: #b47cff;
}

* { box-sizing: border-box; }

html, body { margin: 0; min-height: 100%; }

body {
    min-height: 100vh;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at 15% 15%, rgba(89,200,255,.16), transparent 30rem),
        radial-gradient(circle at 85% 75%, rgba(180,124,255,.12), transparent 32rem),
        var(--bg);
    color: var(--text);
}

button { font: inherit; }

.app {
    width: min(1180px, 100%);
    min-height: 100vh;
    margin: 0 auto;
    padding: 24px;
    display: grid;
    grid-template-rows: auto auto 1fr auto;
    gap: 18px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: end;
}

h1 { margin: 0 0 5px; font-size: clamp(1.65rem, 3vw, 2.5rem); }
p { margin: 0; color: var(--muted); }

.status {
    min-width: 170px;
    text-align: right;
    display: grid;
    gap: 3px;
}

.status strong { color: var(--accent); font-size: 1.1rem; }
.status span { color: var(--muted); font-size: .9rem; }

.number-buttons {
    display: grid;
    grid-template-columns: repeat(9, minmax(0, 1fr));
    gap: 8px;
}

.figure-button,
.mode-button,
.mobile-controls button {
    border: 1px solid var(--border);
    background: rgba(255,255,255,.055);
    color: var(--text);
    border-radius: 12px;
    cursor: pointer;
    transition: transform .15s ease, background .15s ease, border-color .15s ease;
}

.figure-button {
    min-height: 65px;
    padding: 8px 4px;
    display: grid;
    place-items: center;
    gap: 2px;
}

.figure-button:hover,
.mode-button:hover,
.mobile-controls button:hover { transform: translateY(-1px); background: rgba(255,255,255,.1); }
.figure-button.active { border-color: var(--accent); background: rgba(89,200,255,.14); box-shadow: 0 0 0 1px rgba(89,200,255,.18) inset; }
.figure-button .number { font-weight: 800; font-size: 1.15rem; }
.figure-button .label { font-size: .72rem; color: var(--muted); white-space: nowrap; }

.viewer-wrap {
    position: relative;
    min-height: 520px;
    border: 1px solid var(--border);
    border-radius: 18px;
    overflow: hidden;
    background: rgba(0,0,0,.18);
    box-shadow: 0 18px 60px rgba(0,0,0,.25);
}

#viewer {
    display: block;
    width: 100%;
    height: 100%;
    min-height: 520px;
    outline: none;
}

.hint {
    position: absolute;
    left: 50%;
    bottom: 14px;
    transform: translateX(-50%);
    background: rgba(3, 10, 18, .72);
    border: 1px solid var(--border);
    color: var(--muted);
    border-radius: 999px;
    padding: 7px 12px;
    font-size: .8rem;
    white-space: nowrap;
    backdrop-filter: blur(8px);
}

.mobile-controls { display: none; text-align: center; }
.mobile-controls button { width: 60px; height: 44px; margin: 3px; font-size: 1.3rem; }

@media (max-width: 820px) {
    .app { padding: 14px; }
    .topbar { align-items: start; }
    .status { min-width: 125px; }
    .number-buttons { grid-template-columns: repeat(5, 1fr); }
    .figure-button .label { display: none; }
    .viewer-wrap, #viewer { min-height: 430px; }
    .mobile-controls { display: block; }
}

@media (max-width: 520px) {
    .topbar { display: block; }
    .status { margin-top: 12px; text-align: left; }
    .number-buttons { grid-template-columns: repeat(9, 1fr); gap: 4px; }
    .figure-button { min-height: 46px; border-radius: 9px; }
    .viewer-wrap, #viewer { min-height: 390px; }
    .hint { font-size: .7rem; }
}

.display-mode {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.mode-button {
    min-width: 110px;
    min-height: 42px;
    padding: 8px 18px;
}

.mode-button.active {
    border-color: var(--accent);
    background: rgba(89,200,255,.14);
    box-shadow: 0 0 0 1px rgba(89,200,255,.18) inset;
}

.viewer-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-button {
    min-width: 44px;
    min-height: 42px;
    padding: 8px 14px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.055);
    color: var(--text);
    border-radius: 12px;
    cursor: pointer;
    transition: transform .15s ease, background .15s ease, border-color .15s ease;
}

.control-button.wide { min-width: 145px; }
.control-button:hover { transform: translateY(-1px); background: rgba(255,255,255,.1); }
.control-button.active {
    border-color: var(--accent);
    background: rgba(89,200,255,.14);
    box-shadow: 0 0 0 1px rgba(89,200,255,.18) inset;
}

.control-label {
    min-width: 92px;
    text-align: center;
    color: var(--muted);
    font-size: .9rem;
}

#viewer { cursor: grab; touch-action: none; }
#viewer.dragging { cursor: grabbing; }

@media (max-width: 520px) {
    .viewer-controls { gap: 7px; }
    .control-button.wide { min-width: 130px; }
    .hint { white-space: normal; width: calc(100% - 24px); text-align: center; }
}

.dimension-tools {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px 14px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: rgba(255,255,255,.025);
}

.rotation-plane-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.rotation-plane-group label {
    color: var(--muted);
    font-size: .9rem;
}

#rotationPlane {
    min-height: 42px;
    min-width: 92px;
    padding: 8px 32px 8px 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #0b192b;
    color: var(--text);
    font: inherit;
}

.control-button:disabled,
#rotationPlane:disabled {
    opacity: .45;
    cursor: not-allowed;
    transform: none;
}

.dimension-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 10px;
    max-width: 100%;
}

.legend-item {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--muted);
    font-size: .78rem;
}

.legend-item i {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    box-shadow: 0 0 0 1px rgba(255,255,255,.18);
}

@media (max-width: 620px) {
    .dimension-tools { align-items: stretch; }
    .rotation-plane-group { justify-content: center; width: 100%; }
    .dimension-legend { width: 100%; }
}

.rotate-toggle {
    min-width: 180px;
    font-weight: 700;
    border-color: rgba(89,200,255,.55);
}
.rotate-toggle.active {
    border-color: var(--accent);
    background: rgba(89,200,255,.22);
}


/* Versie 1.7: volledig scherm, draaisnelheid en perspectief */
.view-settings {
    display: grid;
    grid-template-columns: repeat(2, minmax(240px, 1fr));
    gap: 12px 18px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: rgba(255,255,255,.025);
}
.range-control {
    display: grid;
    grid-template-columns: 105px minmax(120px, 1fr) 48px;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    font-size: .9rem;
}
.range-control input[type="range"] { width: 100%; accent-color: var(--accent); }
.range-control output { color: var(--text); text-align: right; font-variant-numeric: tabular-nums; }
.viewer-wrap:fullscreen {
    width: 100%;
    height: 100%;
    min-height: 100%;
    border: 0;
    border-radius: 0;
    background: var(--bg);
}
.viewer-wrap:fullscreen #viewer { width: 100%; height: 100%; min-height: 100%; }
.viewer-wrap:fullscreen .hint { bottom: 24px; }
@media (max-width: 620px) {
    .view-settings { grid-template-columns: 1fr; }
    .range-control { grid-template-columns: 100px minmax(90px, 1fr) 46px; }
}

.time4d-panel{max-width:980px;margin:16px auto;padding:14px;border:1px solid rgba(148,163,184,.25);border-radius:14px;background:rgba(15,23,42,.45)}
.time4d-panel h2{margin:0 0 10px;font-size:1rem}.time4d-modes{display:flex;gap:8px;flex-wrap:wrap}.time-controls{margin-top:12px}
.time-controls label:not(.time-check){display:flex;justify-content:space-between;margin-bottom:5px}.time-controls input[type=range]{width:100%}
.time-check{display:block;margin:10px 0}.time-controls p{font-size:.9rem;opacity:.8;line-height:1.45}

/* v2.0.1 compact controls above animation */
.v17-panel,.figure-info,.time4d-panel{max-width:1100px;margin:6px auto;padding:7px 10px}
.v17-panel{gap:6px 12px;border-radius:10px}
.v17-control{min-width:170px;flex:1 1 210px}
.v17-control label{margin-bottom:2px;font-size:.78rem}
.figure-info{gap:5px 12px;padding:4px 8px;font-size:.78rem}
.time4d-panel{border-radius:10px}
.time4d-panel h2{display:inline-block;margin:0 8px 0 0;font-size:.86rem}
.time4d-modes{display:inline-flex;gap:5px;vertical-align:middle}
.time4d-panel .control-button,.v17-panel .control-button{min-height:30px;padding:4px 9px;font-size:.78rem}
.time-controls{margin-top:6px;display:grid;grid-template-columns:minmax(180px,1fr) auto auto;gap:5px 10px;align-items:center}
.time-controls[hidden]{display:none}
.time-controls>label:not(.time-check){grid-column:1;margin:0;font-size:.78rem}
.time-controls>input[type=range]{grid-column:1;margin:0}
.time-check{grid-column:2;margin:0;font-size:.78rem;white-space:nowrap}
#playTime{grid-column:3;grid-row:1 / span 2}
.time-controls p{grid-column:1 / -1;margin:2px 0 0;font-size:.72rem;line-height:1.25}
@media(max-width:700px){
 .time-controls{grid-template-columns:1fr 1fr}
 .time-check,#playTime{grid-column:auto;grid-row:auto}
 .time-controls p{grid-column:1/-1}
}


/* v2.0.2: voorkom cumulatieve canvasgroei */
.viewer-wrap {
    height: 520px;
    min-height: 0;
}
#viewer {
    width: 100%;
    height: 520px;
    min-height: 0;
}
@media (max-width: 820px) {
    .viewer-wrap, #viewer { height: 430px; min-height: 0; }
}
@media (max-width: 520px) {
    .viewer-wrap, #viewer { height: 390px; min-height: 0; }
}
.viewer-wrap:fullscreen {
    width: 100%;
    height: 100%;
}
.viewer-wrap:fullscreen #viewer {
    width: 100%;
    height: 100%;
    min-height: 0;
}