:root { color-scheme: dark; --color-text:#f5f1e8; --color-muted:#b6b0a6; --color-border:#3a3a3d; --color-paper:#f8f5ee; --color-accent:#f5bb4d; --color-panel:#1d1f22; }
* { box-sizing:border-box; }
body { margin:0; color:var(--color-text); background:radial-gradient(circle at 15% 0%, #31302b, #121315 48%); font-family:ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif; }
.app-shell { max-width:1180px; margin:auto; padding:36px 22px 58px; }
.app-header { display:flex; gap:20px; align-items:end; justify-content:space-between; margin-bottom:28px; }
.app-title { font-size:clamp(1.6rem, 4vw, 2.55rem); letter-spacing:.04em; margin:0; }
.app-description { color:var(--color-muted); margin:0; max-width:520px; line-height:1.6; }
.app-layout { display:grid; grid-template-columns:330px minmax(0, 1fr); gap:20px; align-items:start; }
.control-panel, .preview-panel { background:color-mix(in srgb, var(--color-panel) 92%, transparent); border:1px solid var(--color-border); border-radius:14px; padding:20px; box-shadow:0 16px 45px #0004; }
.section-heading { font-size:1rem; margin:0 0 15px; letter-spacing:.08em; color:#fff; }
.field-label { display:block; font-size:.83rem; color:var(--color-muted); margin:15px 0 6px; }
.field-input { width:100%; color:var(--color-text); background:#111214; border:1px solid #4d4e50; border-radius:7px; padding:10px; font:inherit; }
.field-input:focus { outline:2px solid var(--color-accent); outline-offset:1px; }
.field-input[type=file] { padding:8px; }
.field-input[type=range] { padding:0; accent-color:var(--color-accent); }
.field-row { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.field-hint, .projection-note, .preview-info { color:var(--color-muted); font-size:.78rem; line-height:1.55; }
.field-hint { margin:14px 0 0; }
.projection-note { border-top:1px solid var(--color-border); margin:17px 0 0; padding-top:14px; line-height:1.65; }
.projection-note code { color:#f8d58f; }
.download-button { appearance:none; border:0; border-radius:8px; cursor:pointer; font:600 .92rem inherit; padding:12px 15px; color:#1c1608; background:var(--color-accent); margin-top:20px; width:100%; }
.download-button:disabled { opacity:.45; cursor:not-allowed; }
.validation-message { color:#ffb8ac; font-size:.82rem; min-height:1.3em; margin:12px 0 0; }
.preview-grid { display:grid; grid-template-columns:minmax(180px, .85fr) minmax(0, 1.55fr); gap:20px; }
.preview-card { min-width:0; }
.preview-header { display:flex; justify-content:space-between; gap:8px; align-items:baseline; margin:0 0 9px; }
.preview-header .section-heading { margin:0; }
.dimension-label { color:var(--color-muted); font-size:.76rem; white-space:nowrap; }
.canvas-stage { background:var(--color-paper); padding:10px; border-radius:8px; min-height:180px; display:grid; place-items:center; overflow:auto; }
canvas { display:block; max-width:100%; height:auto; image-rendering:auto; }
#inputCanvas { width:min(100%, 280px); aspect-ratio:1; }
#unfoldCanvas { width:100%; min-width:280px; }
.empty-state { color:#6c685f; text-align:center; font-size:.9rem; padding:30px 10px; }
.pattern-legend { display:flex; gap:16px; flex-wrap:wrap; font-size:.76rem; color:var(--color-muted); margin-top:11px; }
.legend-swatch { display:inline-block; width:10px; height:10px; margin-right:5px; border:1px solid #999; vertical-align:-1px; }
.legend-swatch--light { background:#fff; }
.legend-swatch--dark { background:#111; }
.preview-info { margin:13px 0 0; }
.model-viewer { margin-top:20px; }
.model-canvas { height:350px; background:#0b0d10; border-radius:8px; overflow:hidden; position:relative; }
.model-canvas canvas { width:100%; height:100%; }
.model-caption { position:absolute; left:12px; bottom:10px; color:#d7d2c6; font-size:.76rem; pointer-events:none; }
@media (max-width:780px) { .app-header { display:block; } .app-description { margin-top:10px; } .app-layout, .preview-grid { grid-template-columns:1fr; } }