:root {
  color-scheme: dark;
  --bg: #0e1013;
  --surface: #171a1f;
  --surface-soft: #1d2127;
  --surface-raised: #23282f;
  --line: rgba(255, 255, 255, .09);
  --line-strong: rgba(255, 255, 255, .16);
  --text: #f7f6f2;
  --muted: #979da6;
  --soft: #686f79;
  --accent: #ffb84d;
  --accent-strong: #f59a23;
  --mint: #80e5c4;
  --danger: #ff7b7b;
  --radius: 22px;
  --radius-small: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  font-family: "Segoe UI", "Noto Sans Thai", Tahoma, sans-serif;
  color: var(--text);
  background: var(--bg);
}

button, input { font: inherit; }
button { color: inherit; }

.ambient { position: fixed; z-index: -1; border-radius: 50%; filter: blur(1px); pointer-events: none; }
.ambient-one { top: -240px; right: -160px; width: 620px; height: 620px; background: radial-gradient(circle, rgba(255,184,77,.13), transparent 67%); }
.ambient-two { bottom: 2%; left: -300px; width: 700px; height: 700px; background: radial-gradient(circle, rgba(128,229,196,.07), transparent 68%); }

.shell { width: min(980px, calc(100% - 42px)); margin: 0 auto; padding: 28px 0 46px; }

.topbar { display: flex; align-items: center; justify-content: space-between; min-height: 54px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; }
.brand > span:last-child { display: flex; flex-direction: column; }
.brand b { font-size: 18px; letter-spacing: -.02em; }
.brand small { margin-top: 1px; color: var(--soft); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.brand-icon { position: relative; width: 38px; height: 38px; display: block; transform: rotate(-7deg); }
.brand-icon i { position: absolute; width: 23px; height: 23px; border: 2px solid var(--accent); border-radius: 6px; }
.brand-icon i:nth-child(1) { left: 0; bottom: 0; background: rgba(255,184,77,.08); }
.brand-icon i:nth-child(2) { top: 0; right: 0; border-color: var(--mint); opacity: .7; }
.brand-icon i:nth-child(3) { top: 7px; left: 7px; opacity: .28; }

.health { display: flex; align-items: center; gap: 8px; padding: 9px 13px; border: 1px solid var(--line); border-radius: 999px; background: rgba(23,26,31,.72); color: var(--muted); font-size: 12px; backdrop-filter: blur(16px); }
.health i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(255,184,77,.09); }
.health.ok i { background: var(--mint); box-shadow: 0 0 0 4px rgba(128,229,196,.09); }
.health.bad i { background: var(--danger); }

.hero { padding: 46px 0 32px; text-align: center; }
.eyebrow { margin: 0 0 14px; color: var(--accent); font-size: 11px; font-weight: 750; letter-spacing: .14em; text-transform: uppercase; }
.hero h1 { margin: 0; font-size: clamp(36px, 6vw, 58px); line-height: 1.08; letter-spacing: -.05em; }
.hero h1 em { color: var(--accent); font-style: normal; }
.lede { margin: 12px 0 0; color: var(--muted); font-size: 15px; line-height: 1.6; }

.workspace { display: block; }
.creator-card, .side-card, .status-panel { border: 1px solid var(--line); background: rgba(23,26,31,.94); box-shadow: 0 24px 70px rgba(0,0,0,.22); }
.creator-card { overflow: hidden; border-radius: var(--radius); }
.card-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; padding: 25px 28px 20px; }
.card-heading > div, .settings-heading, .control-title > div { display: flex; align-items: center; gap: 11px; }
.card-heading h2, .settings-heading h2, .control-title h2 { margin: 0; font-size: 17px; letter-spacing: -.02em; }
.card-heading p { margin: 0; color: var(--soft); font-size: 11px; }
.step-number { display: grid; place-items: center; width: 28px; height: 28px; border: 1px solid var(--line-strong); border-radius: 9px; color: var(--accent); font: 700 10px/1 Consolas, monospace; }

.drop-zone { min-height: 270px; margin: 0 16px 16px; display: grid; place-items: center; align-content: center; text-align: center; border: 1px dashed var(--line-strong); border-radius: 17px; outline: none; background: linear-gradient(145deg, rgba(255,255,255,.025), rgba(255,255,255,.006)); transition: border-color .2s ease, background .2s ease, transform .2s ease; cursor: pointer; }
.drop-zone:hover, .drop-zone.drag, .drop-zone:focus { border-color: rgba(255,184,77,.72); background: rgba(255,184,77,.035); }
.drop-zone.drag { transform: scale(.992); }
.upload-icon { position: relative; width: 76px; height: 76px; margin-bottom: 21px; display: grid; place-items: center; }
.upload-icon span { position: absolute; inset: 0; border: 1px solid var(--line-strong); border-radius: 24px; background: var(--surface-soft); transform: rotate(7deg); }
.upload-icon::after { content: ""; position: absolute; inset: 8px; border: 1px solid rgba(255,184,77,.35); border-radius: 19px; transform: rotate(-12deg); }
.upload-icon b { position: relative; z-index: 1; color: var(--accent); font-size: 27px; font-weight: 400; }
.drop-title { margin: 0; font-size: 22px; font-weight: 700; letter-spacing: -.025em; }
.drop-subtitle { margin: 9px 0 0; color: var(--muted); font-size: 13px; }
.drop-subtitle button { padding: 0; border: 0; background: none; color: var(--accent); cursor: pointer; font-weight: 650; }

.file-card { display: flex; align-items: center; gap: 13px; margin: 0 16px 14px; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-small); background: var(--surface-soft); }
.file-icon { display: grid; place-items: center; width: 39px; height: 39px; border-radius: 11px; background: rgba(255,184,77,.12); color: var(--accent); font: 800 11px Consolas, monospace; }
.file-meta { min-width: 0; display: flex; flex: 1; flex-direction: column; gap: 2px; }
.file-meta strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
.file-meta span { color: var(--soft); font-size: 11px; }
.file-card button { padding: 7px 10px; border: 1px solid var(--line); border-radius: 8px; background: transparent; color: var(--muted); font-size: 11px; cursor: pointer; }
.file-card button:hover { border-color: var(--line-strong); color: var(--text); }

.preview-panel { display: block; margin: 0 16px 16px; overflow: hidden; border: 1px solid var(--line); border-radius: 17px; background: var(--surface); }
.preview-stage { position: relative; min-height: 480px; overflow: hidden; border-bottom: 1px solid var(--line); background:
  linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
  linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px),
  radial-gradient(circle at 50% 43%, #353a42 0, #20242a 48%, #15181c 78%);
  background-size: 34px 34px, 34px 34px, auto;
}
model-viewer { width: 100%; height: 480px; --poster-color: transparent; }
model-viewer::part(default-progress-bar) { display: none; }
.collision-preview { position: absolute; z-index: 1; inset: 0; pointer-events: none; background: transparent; }
.preview-fallback { position: absolute; inset: 0; z-index: 2; display: grid; place-items: center; padding: 80px 20px 20px; text-align: center; background: radial-gradient(circle at 50% 45%, rgba(49,54,62,.92), rgba(21,24,28,.98) 68%); }
.preview-fallback > div { display: flex; flex-direction: column; gap: 7px; }
.preview-fallback b { font-size: 15px; }
.preview-fallback span { color: var(--muted); font-size: 11px; }
.preview-stage.no-webgl model-viewer, .preview-stage.no-webgl .camera-tools { visibility: hidden; }
.viewport-label { position: absolute; z-index: 3; top: 16px; left: 17px; display: flex; flex-direction: column; gap: 3px; pointer-events: none; }
.viewport-label span { font-size: 11px; font-weight: 700; }
.viewport-label small { color: rgba(255,255,255,.48); font-size: 10px; }
.viewport-label b { width: fit-content; margin-top: 5px; padding: 5px 8px; border: 1px solid rgba(255,255,255,.12); border-radius: 7px; background: rgba(17,20,24,.72); color: var(--accent); font: 700 10px Consolas, monospace; backdrop-filter: blur(8px); }
.camera-tools { position: absolute; z-index: 3; top: 14px; right: 14px; display: flex; align-items: center; gap: 7px; }
.camera-tools span, .camera-tools button { min-height: 31px; padding: 0 11px; border: 1px solid rgba(255,255,255,.12); border-radius: 9px; background: rgba(17,20,24,.78); color: rgba(255,255,255,.72); font-size: 10px; backdrop-filter: blur(10px); }
.camera-tools span { display: inline-flex; align-items: center; color: var(--accent); font-family: Consolas, monospace; }
.camera-tools button { cursor: pointer; }
.camera-tools button:hover { border-color: rgba(255,184,77,.5); color: var(--text); }
.camera-tools button.active { border-color: rgba(128,229,196,.6); background: rgba(31,86,68,.82); color: var(--mint); }
.collision-legend { position: absolute; z-index: 3; left: 17px; bottom: 16px; display: flex; align-items: center; gap: 7px; padding: 7px 10px; border: 1px solid rgba(128,229,196,.34); border-radius: 9px; background: rgba(12,24,20,.82); color: #b8ead9; font-size: 10px; backdrop-filter: blur(10px); }
.collision-legend i { width: 8px; height: 8px; border-radius: 2px; background: #55f0a6; box-shadow: 0 0 9px rgba(85,240,166,.65); }
.collision-legend.none { border-color: var(--line); background: rgba(17,20,24,.82); color: var(--muted); }
.collision-legend.none i { background: var(--soft); box-shadow: none; }

.scale-control { display: grid; grid-template-columns: minmax(0, 1fr) 360px; grid-template-areas: "title dimensions" "inputs inputs"; gap: 14px 24px; align-items: center; padding: 18px 20px; background: var(--surface); }
.control-title { grid-area: title; display: flex; align-items: center; justify-content: flex-start; gap: 16px; }
.control-title h2 { white-space: nowrap; }
.control-title output { color: var(--accent); font: 800 22px Consolas, monospace; }
.control-hint { display: none; }
.scale-inputs { grid-area: inputs; display: flex; align-items: center; gap: 18px; min-width: 0; }
input[type="range"] { width: 100%; height: 4px; margin: 5px 0 22px; appearance: none; border-radius: 5px; outline: none; background: linear-gradient(90deg, var(--accent) var(--range-fill, 18.37%), #383d45 var(--range-fill, 18.37%)); }
.scale-inputs input[type="range"] { flex: 1; min-width: 100px; margin: 0; }
input[type="range"]::-webkit-slider-thumb { width: 19px; height: 19px; appearance: none; border: 4px solid var(--surface); border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 1px var(--accent); cursor: ew-resize; }
input[type="range"]::-moz-range-thumb { width: 13px; height: 13px; border: 4px solid var(--surface); border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 1px var(--accent); cursor: ew-resize; }
.scale-presets { display: grid; flex: 0 0 auto; grid-template-columns: repeat(3, 58px); gap: 6px; }
.scale-presets button { min-height: 34px; padding: 6px 3px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface-soft); color: var(--muted); font-size: 10px; cursor: pointer; }
.scale-presets button:hover, .scale-presets button.active { border-color: rgba(255,184,77,.6); background: rgba(255,184,77,.07); color: var(--accent); }
.dimension-card { grid-area: dimensions; margin: 0; padding: 12px 14px; display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; align-items: center; border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,.018); }
.dimension-card span { display: flex; min-width: 0; flex-direction: column; gap: 4px; color: var(--soft); font-size: 9px; }
.dimension-card b { overflow-wrap: anywhere; color: #d5d7da; font: 10px/1.45 Consolas, monospace; }
.dimension-card i { color: var(--soft); font-style: normal; }

.settings { padding: 22px 28px; border-top: 1px solid var(--line); }
.settings-heading { margin-bottom: 20px; }
.fields { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; align-items: start; }
.fields > label > span, legend { display: block; margin-bottom: 9px; color: #d2d5d8; font-size: 12px; font-weight: 650; }
input[type="text"] { width: 100%; min-height: 48px; padding: 0 14px; border: 1px solid var(--line); border-radius: 11px; outline: none; background: #111418; color: var(--text); font-family: Consolas, monospace; transition: border-color .18s ease; }
input[type="text"]:focus { border-color: rgba(255,184,77,.65); }
small { display: block; margin-top: 6px; color: var(--soft); font-size: 10px; }
fieldset { margin: 0; padding: 0; border: 0; }
.choice-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.choice { position: relative; min-height: 48px; display: flex; align-items: center; justify-content: center; padding: 9px; border: 1px solid var(--line); border-radius: 11px; background: #111418; cursor: pointer; }
.choice:has(input:checked) { border-color: rgba(255,184,77,.58); background: rgba(255,184,77,.055); }
.choice input { width: 0; height: 0; margin: 0; opacity: 0; }
.choice span { display: flex; align-items: center; flex-direction: row; gap: 6px; }
.choice b { font-size: 12px; }
.choice small { margin-top: 2px; }

.convert { width: calc(100% - 32px); min-height: 58px; margin: 0 16px 16px; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; border: 0; border-radius: 14px; background: linear-gradient(135deg, var(--accent), var(--accent-strong)); color: #1b1308; font-weight: 800; cursor: pointer; transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease; }
.convert:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 13px 28px rgba(245,154,35,.17); }
.convert b { display: grid; place-items: center; width: 31px; height: 31px; border-radius: 50%; background: rgba(20,13,5,.12); }
.convert:disabled { opacity: .35; cursor: not-allowed; }

.side-panel { position: sticky; top: 20px; display: flex; flex-direction: column; gap: 14px; }
.side-card { border-radius: var(--radius); }
.how-card { padding: 26px; }
.side-label { color: var(--mint); font-size: 10px; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
.how-card h3 { margin: 12px 0 25px; font-size: 22px; line-height: 1.3; letter-spacing: -.035em; }
.how-card ol { margin: 0; padding: 0; display: flex; flex-direction: column; gap: 17px; list-style: none; }
.how-card li { display: flex; align-items: center; gap: 12px; }
.how-card li > i { display: grid; flex: 0 0 auto; place-items: center; width: 32px; height: 32px; border: 1px solid var(--line); border-radius: 10px; color: var(--accent); background: var(--surface-soft); font: 700 10px Consolas, monospace; font-style: normal; }
.how-card li span { display: flex; flex-direction: column; }
.how-card li b { font-size: 12px; }
.how-card li small { margin-top: 2px; }
.ready-card { display: flex; align-items: flex-start; gap: 13px; padding: 18px; background: linear-gradient(145deg, rgba(128,229,196,.09), rgba(23,26,31,.95)); }
.ready-icon { display: grid; flex: 0 0 auto; place-items: center; width: 31px; height: 31px; border-radius: 10px; background: var(--mint); color: #0a211a; font-weight: 900; }
.ready-card b { font-size: 12px; }
.ready-card p { margin: 5px 0 0; color: var(--muted); font-size: 11px; line-height: 1.6; }
.privacy-note { display: flex; align-items: center; justify-content: center; gap: 7px; margin: 3px 0 0; color: var(--soft); font-size: 10px; }
.privacy-note i { width: 6px; height: 6px; border-radius: 50%; background: var(--mint); }

.status-panel { display: grid; grid-template-columns: auto 1fr auto; gap: 20px; align-items: center; margin-top: 20px; padding: 22px 24px; border-radius: var(--radius); }
.spinner { width: 44px; height: 44px; border: 3px solid #343941; border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
.status-panel.queued .spinner { animation-duration: 1.6s; border-top-color: var(--mint); }
.status-panel.queued .eyebrow { color: var(--mint); }
.status-panel.done .spinner, .status-panel.error .spinner { display: grid; place-items: center; border: 0; border-radius: 14px; animation: none; }
.status-panel.done .spinner { background: var(--mint); }
.status-panel.done .spinner::after { content: "✓"; color: #0a211a; font-weight: 900; }
.status-panel.error .spinner { background: var(--danger); }
.status-panel.error .spinner::after { content: "!"; color: #231010; font-weight: 900; }
.status-copy .eyebrow { margin-bottom: 5px; }
.status-copy h2 { margin: 0 0 4px; font-size: 19px; }
.status-copy > p:last-of-type { margin: 0; color: var(--muted); font-size: 12px; }
.job-progress-row { width: min(440px, 100%); margin-top: 12px; display: flex; align-items: center; gap: 10px; }
.job-progress { flex: 1; height: 6px; overflow: hidden; border-radius: 99px; background: #343941; }
.job-progress i { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent), #ffd184); transition: width .45s ease; }
.job-progress-row output { min-width: 38px; color: var(--accent); font: 700 10px Consolas, monospace; text-align: right; }
.status-panel.error .job-progress-row, .status-panel.done .job-progress-row { display: none; }
.download { padding: 13px 16px; border-radius: 11px; background: var(--mint); color: #081b15; text-decoration: none; font-size: 12px; font-weight: 800; white-space: nowrap; }
.stats { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 11px; }
.stats span { padding: 5px 8px; border: 1px solid var(--line); border-radius: 7px; color: #b5bac0; font: 9px Consolas, monospace; }

footer { display: flex; align-items: center; justify-content: space-between; padding: 45px 2px 0; color: var(--soft); font-size: 10px; }
footer span { color: var(--muted); font-weight: 750; }
footer p { margin: 0; }
.hidden { display: none !important; }

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

@media (max-width: 900px) {
  .workspace { display: block; }
}

@media (max-width: 720px) {
  .hero { padding: 46px 0 28px; }
  .preview-stage, model-viewer { min-height: 400px; height: 400px; }
  .scale-control { grid-template-columns: 1fr; grid-template-areas: "title" "inputs" "dimensions"; gap: 15px; }
  .fields { grid-template-columns: 1fr; }
}

@media (max-width: 540px) {
  .shell { width: min(100% - 20px, 1180px); padding-top: 15px; }
  .brand small { display: none; }
  .health { padding: 8px 10px; }
  .hero h1 { font-size: 45px; }
  .hero .lede { font-size: 14px; }
  .card-heading { align-items: flex-start; padding: 20px 18px 16px; }
  .card-heading p { max-width: 120px; text-align: right; line-height: 1.5; }
  .drop-zone { min-height: 280px; }
  .settings { padding: 22px 18px; }
  .scale-inputs { align-items: stretch; flex-direction: column; }
  .scale-inputs input[type="range"] { width: 100%; min-height: 20px; }
  .scale-presets { width: 100%; grid-template-columns: repeat(3, 1fr); }
  .choice-grid { grid-template-columns: 1fr; }
  .side-panel { grid-template-columns: 1fr; }
  .privacy-note { grid-column: auto; }
  .status-panel { grid-template-columns: auto 1fr; }
  .download { grid-column: 1 / -1; text-align: center; }
  footer { padding-top: 30px; }
}