:root {
  --bg: #0f1113;
  --surface: #1a1d21;
  --surface-2: #23272c;
  --border: #2e3339;
  --text: #e8eaed;
  --muted: #9aa1a9;
  --accent: #ff7a1a;
  --accent-ink: #1a0d02;
  --ok: #3ddc97;
  --err: #ff6b6b;
  --radius: 14px;
  --gutter: 16px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  overflow-x: hidden;
}
a { color: var(--accent); }
h1, h2 { line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: 1.35rem; }
h2 { font-size: 1.1rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }

/* ------------------------------------------------------------ top bar */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 10px var(--gutter);
  padding-top: max(10px, env(safe-area-inset-top));
  background: rgba(15, 17, 19, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; color: var(--text); text-decoration: none; min-width: 0; }
.brand-name { font-weight: 700; letter-spacing: .2px; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.brand img { flex: none; }
.brand-by { color: var(--muted); font-size: .8rem; white-space: nowrap; }
.topbar-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.lang-switch { display: flex; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.lang-switch a {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 38px; min-height: 36px; padding: 0 8px;
  color: var(--muted); font-weight: 600; font-size: .8rem; line-height: 1; text-decoration: none;
}
.lang-switch a[aria-current="page"] { background: var(--surface-2); color: var(--text); }
.lang-switch a:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.soon-badge {
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 36px; padding: 3px 10px; border-radius: 10px;
  border: 1px solid rgba(255, 122, 26, .5); color: var(--text); text-decoration: none;
  line-height: 1.15; white-space: nowrap;
}
.soon-os { font-weight: 600; font-size: .78rem; }
.soon-label { font-size: .64rem; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }
.soon-badge:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ------------------------------------------------------------ buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 44px; padding: 0 18px;
  border: 1px solid transparent; border-radius: 10px;
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.btn-sm { min-height: 36px; padding: 0 12px; font-size: .88rem; }
.btn-accent { background: var(--accent); color: var(--accent-ink); }
.btn-accent:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--surface-2); }
.btn:disabled { opacity: .6; cursor: default; }
.btn:focus-visible, .icon-btn:focus-visible, .play:focus-visible, .speed:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ------------------------------------------------------------ layout */
main {
  max-width: 1100px; margin: 0 auto;
  padding: var(--gutter);
  display: grid; gap: var(--gutter);
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 900px) {
  main { grid-template-columns: minmax(0, 1fr) 340px; align-items: start; }
  .viewer-card { grid-row: span 3; }
}
.panel, .viewer-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.panel { padding: 16px; }

/* ------------------------------------------------------------ viewer */
.viewer-card { overflow: hidden; }
.viewer {
  position: relative;
  height: min(62vh, 640px);
  min-height: 300px;
  background: #16181b;
}
/* touch-action only on the canvas: on .viewer it would also block page scrolling over the dropzone */
.viewer canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.dropzone {
  position: absolute; inset: 10px;
  display: grid; place-items: center;
  border: 2px dashed var(--border); border-radius: 12px;
  background: rgba(22, 24, 27, .96);
  text-align: center; padding: 16px;
  transition: border-color .15s, background .15s;
  touch-action: auto;
}
body.dragging .dropzone { border-color: var(--accent); background: rgba(255, 122, 26, .08); }
.dropzone[hidden] { display: none; }
.dz-inner { max-width: 420px; }
.dz-cta { margin: 0 0 .25em; font-weight: 600; }
.dz-icon { width: 56px; height: 56px; color: var(--accent); margin-bottom: 4px; }
.samples { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px; margin-top: 16px; }
.privacy { margin: 18px 0 0; font-size: .85rem; color: var(--ok); }
.error { color: var(--err); margin-top: 12px; }

.loading {
  position: absolute; inset: 0; display: grid; place-content: center; justify-items: center; gap: 12px;
  background: rgba(15, 17, 19, .8); z-index: 5;
}
.loading[hidden] { display: none; }
.spinner {
  width: 36px; height: 36px; border-radius: 50%;
  border: 3px solid var(--border); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.viewer-tools {
  position: absolute; top: 10px; right: 10px;
  display: flex; flex-direction: column; gap: 6px;
}
.viewer-tools[hidden] { display: none; }
.icon-btn {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 10px; border: 1px solid var(--border);
  background: rgba(26, 29, 33, .9); color: var(--text);
  font: 600 .78rem/1 inherit; cursor: pointer;
}
.icon-btn:hover { border-color: var(--accent); }
.legend {
  position: absolute; left: 10px; bottom: 10px;
  display: flex; gap: 10px; flex-wrap: wrap;
  font-size: .78rem; color: var(--muted);
  background: rgba(26, 29, 33, .85); padding: 4px 8px; border-radius: 8px;
  pointer-events: none;
}
.legend[hidden] { display: none; }
.legend i { display: inline-block; width: 10px; height: 3px; border-radius: 2px; margin-right: 5px; vertical-align: middle; }
.legend i.dash { background: repeating-linear-gradient(90deg, var(--c) 0 3px, transparent 3px 5px); }

/* ------------------------------------------------------------ controls */
.controls { padding: 12px 14px 14px; border-top: 1px solid var(--border); }
.controls[hidden] { display: none; }
.slider-row { display: flex; align-items: center; gap: 10px; }
.play {
  flex: none; width: 44px; height: 44px; border-radius: 50%;
  border: 0; background: var(--accent); color: var(--accent-ink);
  display: grid; place-items: center; cursor: pointer;
}
.speed {
  flex: none; min-width: 44px; height: 36px; border-radius: 8px;
  border: 1px solid var(--border); background: transparent; color: var(--text);
  font: 600 .85rem/1 inherit; cursor: pointer;
}
input[type=range] {
  flex: 1; min-width: 0; height: 44px; margin: 0;
  -webkit-appearance: none; appearance: none; background: transparent;
}
input[type=range]::-webkit-slider-runnable-track { height: 6px; background: var(--surface-2); border-radius: 3px; }
input[type=range]::-moz-range-track { height: 6px; background: var(--surface-2); border-radius: 3px; }
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 26px; height: 26px; margin-top: -10px;
  border-radius: 50%; background: var(--text); border: 3px solid var(--accent);
}
input[type=range]::-moz-range-thumb { width: 22px; height: 22px; border-radius: 50%; background: var(--text); border: 3px solid var(--accent); }
.step-label {
  font: .82rem/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--muted); margin: 4px 0 10px; min-height: 1.4em;
  overflow-wrap: anywhere;
}
.toggles { display: flex; flex-wrap: wrap; gap: 10px 20px; }
.toggle { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; min-height: 32px; user-select: none; }
.toggle[hidden] { display: none; }
.toggle input { position: absolute; opacity: 0; pointer-events: none; }
.toggle .track {
  width: 38px; height: 22px; border-radius: 11px; background: var(--surface-2);
  border: 1px solid var(--border); position: relative; transition: background .15s;
}
.toggle .track::after {
  content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--muted); transition: transform .15s, background .15s;
}
.toggle input:checked + .track { background: rgba(255, 122, 26, .25); border-color: var(--accent); }
.toggle input:checked + .track::after { transform: translateX(16px); background: var(--accent); }
.toggle input:focus-visible + .track { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ------------------------------------------------------------ summary */
.panel[hidden] { display: none; }
.file-line { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; overflow-wrap: anywhere; }
.pill { font-size: .75rem; padding: 2px 8px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); }
.pill.cnc { color: #4fc3f7; border-color: rgba(79, 195, 247, .4); }
.pill.print { color: #d8e4ec; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 0; }
.stats div { background: var(--surface-2); border-radius: 10px; padding: 8px 10px; min-width: 0; }
.stats dt { font-size: .75rem; color: var(--muted); }
.stats dd { margin: 2px 0 0; font-weight: 600; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.tag { font-weight: 400; color: var(--muted); font-size: .72rem; }
.stats div.wide { grid-column: 1 / -1; }
.ctl-model { font-weight: 400; }
.pill.ctl { color: #ffd166; border-color: rgba(255, 209, 102, .4); }

/* ------------------------------------------------------------ app soon */
.app-soon { border-color: rgba(255, 122, 26, .4); }
.stores { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.store {
  display: inline-flex; flex-direction: column; min-width: 120px; padding: 8px 14px;
  border-radius: 10px; background: var(--surface-2); border: 1px solid var(--border); line-height: 1.25;
}
.store-os { font-weight: 700; }
.store-soon { font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }

/* ------------------------------------------------------------ faq/footer */
.faq details { border-top: 1px solid var(--border); padding: 10px 0; }
.faq details:first-of-type { border-top: 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { margin: 8px 0 0; color: var(--muted); }
.footer {
  display: flex; flex-wrap: wrap; gap: 6px 14px; justify-content: center;
  padding: 20px var(--gutter) max(24px, env(safe-area-inset-bottom));
  font-size: .85rem;
}

@media (max-width: 420px) {
  .brand-by { display: none; }
  .topbar { padding-left: 12px; padding-right: 12px; }
  .topbar-actions { gap: 6px; }
  .lang-switch a { min-width: 32px; padding: 0 6px; }
  .soon-badge { padding: 3px 8px; }
  .stats { grid-template-columns: 1fr 1fr; }
}