.trainhu3d {
    --navy: #071824;
    --panel: #0c2230;
    --line: rgba(255,255,255,.13);
    --cyan: #20c7e8;
    --text: #f4f8fa;
    --muted: #9fb0ba;
    display: grid;
    grid-template-columns: minmax(290px, 380px) minmax(0, 1fr);
    position: relative;
    left: calc(50% - 50vw + 16px);
    width: calc(100vw - 32px);
    max-width: none !important;
    min-height: min(820px, 88vh);
    overflow: hidden;
    border-radius: 24px;
    color: var(--text);
    background: var(--navy);
    box-shadow: 0 25px 80px rgba(0,0,0,.22);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.trainhu3d *, .trainhu3d *::before, .trainhu3d *::after { box-sizing: border-box; }
.trainhu3d__panel { padding: 28px; overflow-y: auto; background: var(--panel); }
.trainhu3d__brand { padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.trainhu3d__eyebrow { color: var(--cyan); font-size: 11px; font-weight: 800; letter-spacing: .18em; }
.trainhu3d h2 { margin: 7px 0 5px; color: #fff; font-size: 25px; line-height: 1.15; }
.trainhu3d h3 { margin: 0 0 13px; color: var(--cyan); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; }
.trainhu3d p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.5; }
.trainhu3d__section { padding: 22px 0; border-bottom: 1px solid var(--line); }
.trainhu3d__section label { display: grid; grid-template-columns: 1fr auto; gap: 7px 12px; margin: 0 0 17px; color: #dce6eb; font-size: 13px; font-weight: 650; }
.trainhu3d__section label:last-child { margin-bottom: 0; }
.trainhu3d output { color: var(--cyan); font-variant-numeric: tabular-nums; }
.trainhu3d input[type="range"] { grid-column: 1 / -1; width: 100%; accent-color: var(--cyan); }
.trainhu3d select { grid-column: 1 / -1; width: 100%; min-height: 42px; padding: 0 11px; color: #fff; border: 1px solid var(--line); border-radius: 10px; background: #102b3b; }
.trainhu3d input[type="color"] { width: 100%; height: 42px; padding: 4px; border: 1px solid var(--line); border-radius: 10px; background: #102b3b; }
.trainhu3d__grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.trainhu3d__grid2 label { display: block; margin: 0; }
.trainhu3d__grid2 select, .trainhu3d__grid2 input { display: block; margin-top: 8px; }
.trainhu3d__help { margin-bottom: 12px !important; }
.trainhu3d__included { margin: -5px 0 12px !important; color: #c8d6dc !important; font-size: 11px !important; }
.trainhu3d__tools { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.trainhu3d button { min-height: 42px; padding: 9px 12px; color: #dce6eb; border: 1px solid var(--line); border-radius: 10px; background: #102b3b; cursor: pointer; font: inherit; font-weight: 700; }
.trainhu3d button:hover, .trainhu3d button[aria-pressed="true"] { color: #06131b; border-color: var(--cyan); background: var(--cyan); }
.trainhu3d button:disabled { cursor: not-allowed; opacity: .42; }
.trainhu3d [data-action="undo"] { grid-column: 1 / -1; }
.trainhu3d__module-count { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; color: #dce6eb; font-size: 13px; font-weight: 700; }
.trainhu3d__module-count output { color: var(--cyan); }
.trainhu3d__module-tools { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 10px; }
.trainhu3d__module-help { margin-top: 10px !important; font-size: 11px !important; }
.trainhu3d__opening-list { display: grid; gap: 7px; margin-top: 12px; color: var(--muted); font-size: 12px; }
.trainhu3d__opening-row { display: grid; grid-template-columns: minmax(0, 1fr) 38px; gap: 6px; padding: 4px; border: 1px solid transparent; border-radius: 11px; background: rgba(255,255,255,.035); }
.trainhu3d__opening-row.is-selected { border-color: var(--cyan); background: rgba(32,199,232,.12); box-shadow: 0 0 0 1px rgba(32,199,232,.12); }
.trainhu3d .trainhu3d__opening-select { min-height: 34px; padding: 6px 8px; border: 0; text-align: left; background: transparent; font-size: 11px; }
.trainhu3d .trainhu3d__opening-select:hover, .trainhu3d .trainhu3d__opening-select[aria-pressed="true"] { color: #fff; border-color: transparent; background: transparent; }
.trainhu3d .trainhu3d__opening-remove { min-height: 34px; padding: 0; color: #ffb8b8; border: 0; background: rgba(255,90,90,.11); font-size: 22px; line-height: 1; }
.trainhu3d .trainhu3d__opening-remove:hover { color: #fff; border-color: #ff6969; background: #d93f3f; }
.trainhu3d__stage { position: relative; min-width: 0; min-height: 620px; overflow: hidden; background: radial-gradient(circle at 50% 35%, #17465a 0, #0a2635 42%, #06131c 100%); }
.trainhu3d__viewport { position: absolute; inset: 0; cursor: grab; touch-action: none; }
.trainhu3d__viewport:active { cursor: grabbing; }
.trainhu3d__viewport canvas.is-moving-opening { cursor: ew-resize; }
.trainhu3d__viewport canvas { display: block; width: 100%; height: 100%; }
.trainhu3d__topbar { position: absolute; z-index: 2; top: 22px; right: 22px; left: 22px; display: flex; justify-content: space-between; gap: 12px; pointer-events: none; }
.trainhu3d__topbar > div { display: flex; flex-direction: column; padding: 12px 15px; border: 1px solid rgba(255,255,255,.12); border-radius: 13px; background: rgba(4,18,27,.78); box-shadow: 0 10px 30px rgba(0,0,0,.18); backdrop-filter: blur(10px); }
.trainhu3d__topbar strong { color: #fff; font-size: 17px; }
.trainhu3d__topbar span { color: var(--muted); font-size: 11px; }
.trainhu3d__price { text-align: right; }
.trainhu3d__price strong { color: var(--cyan); }
.trainhu3d__hint { position: absolute; z-index: 2; bottom: 22px; left: 50%; padding: 8px 13px; transform: translateX(-50%); border-radius: 999px; color: #dce6eb; background: rgba(4,18,27,.72); font-size: 11px; pointer-events: none; white-space: nowrap; }
.trainhu3d__reset { position: absolute; z-index: 3; right: 22px; bottom: 22px; }

@media (max-width: 900px) {
    .trainhu3d { left: calc(50% - 50vw + 10px); grid-template-columns: 1fr; width: calc(100vw - 20px); border-radius: 16px; }
    .trainhu3d__panel { max-height: none; }
    .trainhu3d__stage { min-height: 520px; }
}

@media (max-width: 520px) {
    .trainhu3d__panel { padding: 20px; }
    .trainhu3d__grid2 { grid-template-columns: 1fr; }
    .trainhu3d__topbar { top: 12px; right: 12px; left: 12px; }
    .trainhu3d__topbar strong { font-size: 14px; }
    .trainhu3d__hint { right: 12px; bottom: 66px; left: 12px; transform: none; text-align: center; white-space: normal; }
    .trainhu3d__reset { right: 12px; bottom: 12px; }
}