/* FoldPaper — shares its design language with maze-development.com
   (paper/ink palette, Geist + Instrument Serif, square corners, hairlines, mono labels). */

:root {
  /* Tokens copied from maze-site */
  --paper: #0d0b09;
  --paper-2: #161310;
  --paper-3: #1e1a15;
  --ink: #ece8df;
  --ink-2: #c8c2b3;
  --ink-mute: #88826f;
  --ink-dim: #57534a;
  --line: rgba(236, 232, 223, 0.1);
  --line-2: rgba(236, 232, 223, 0.22);
  --accent: #c772fe;
  --accent-dim: rgba(199, 114, 254, 0.12);
  --on-accent: #0a0008;
  --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;

  /* FoldPaper additions */
  --danger: #ff8a8a;
  --warn: #f5b76a;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  --topbar: 56px;
  --gutter: 32px;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 14px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
/* paper grain */
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image: radial-gradient(rgba(236, 232, 223, 0.022) 1px, transparent 1px);
  background-size: 3px 3px; opacity: 0.65;
}
::selection { background: var(--accent); color: var(--on-accent); }
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--ink-dim); }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

h1, h2, h3, p, dl, dd, figure, ul { margin: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; }
em { font-style: italic; }
u { text-underline-offset: 3px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.icon { display: inline-flex; flex: none; }
.muted { color: var(--ink-mute); font-size: 12.5px; }

/* Small uppercase mono labels, as used across maze-development.com */
.field-label, .slider-label, .spec-chips dt, .info dt, h3, .legend, figcaption, .kbd-hint, .badge, .device-chip {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ---- Masthead & footer (same structure as maze-site's product pages) --------- */
.app { position: relative; z-index: 1; min-height: 100dvh; display: flex; flex-direction: column; }

.masthead {
  position: sticky; top: 0; z-index: 30;
  border-bottom: 1px solid var(--line);
  background: color-mix(in oklab, var(--paper) 85%, transparent);
  backdrop-filter: blur(12px);
}
.mast-inner {
  display: flex; justify-content: space-between; align-items: center; gap: 24px;
  height: var(--topbar); padding: 0 var(--gutter);
}
.mast-logo { display: flex; align-items: center; gap: 10px; min-width: 0; font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; color: var(--ink-2); white-space: nowrap; }
.mast-logo .back { color: var(--ink-mute); transition: color 0.15s; }
.mast-logo .back:hover { color: var(--accent); }
.mast-logo .sep { color: var(--ink-dim); }
.mast-icon { width: 22px; height: 22px; display: block; object-fit: contain; }
.mast-name { color: var(--ink); }
.device-chip { padding: 3px 9px; border: 1px solid var(--line-2); }
.export-anchor { position: relative; }

.site-footer { border-top: 1px solid var(--ink-dim); background: var(--paper-2); padding: 32px 0; position: relative; z-index: 1; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px 28px; padding: 0 var(--gutter); }
.footer-mark { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.footer-logo { display: block; height: 52px; width: auto; opacity: 0.9; transition: opacity 0.15s; }
.footer-mark:hover .footer-logo { opacity: 1; }
.footer-brand { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-dim); }
.footer-brand b { color: var(--accent); font-weight: 500; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 28px; }
.footer-links a { font-size: 12px; letter-spacing: 0.02em; color: var(--ink-dim); transition: color 0.15s; }
.footer-links a:hover { color: var(--ink); }

/* ---- Layout ------------------------------------------------------------------ */
.layout {
  flex: 1; display: grid; grid-template-columns: minmax(0, 1fr) 400px; gap: 24px; align-items: start;
  padding: 24px var(--gutter) 40px;
}
.stage-col {
  position: sticky; top: calc(var(--topbar) + 24px);
  height: calc(100dvh - var(--topbar) - 48px); min-height: 540px;
  display: flex; flex-direction: column; gap: 12px; min-width: 0;
}
.toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 16px; }
.stage { position: relative; flex: 1; min-height: 0; background: var(--paper-2); border: 1px solid var(--line); overflow: hidden; }
.stage:focus-visible { outline-offset: 3px; }
.preview, .pane { position: absolute; inset: 0; }
.side { display: flex; flex-direction: column; gap: 16px; min-width: 0; }

/* ---- Cards ------------------------------------------------------------------- */
.card { background: var(--paper-2); border: 1px solid var(--line); padding: 18px; transition: border-color 0.2s; }
.card.is-active { border-color: rgba(199, 114, 254, 0.5); }
.card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-bottom: 14px; }
.card-head h2, .popover-head h2 { font-family: var(--serif); font-size: 26px; font-weight: 400; line-height: 1.05; letter-spacing: -0.012em; color: var(--ink); }
.card-head .muted { margin-top: 4px; }
.badge { padding: 3px 8px; border: 1px solid rgba(199, 114, 254, 0.45); background: var(--accent-dim); color: var(--accent); white-space: nowrap; }
.spec-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.spec-chips > div { display: flex; gap: 8px; align-items: baseline; padding: 4px 10px; border: 1px solid var(--line); }
.spec-chips dd { font-family: var(--mono); font-size: 12px; color: var(--ink-2); font-variant-numeric: tabular-nums; }

/* ---- Buttons & controls -------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 40px; padding: 0 18px; border: 1px solid var(--line-2); background: transparent; color: var(--ink-2);
  font-size: 13px; font-weight: 500; letter-spacing: 0.03em; white-space: nowrap; cursor: pointer;
  transition: transform 0.12s, background 0.15s, color 0.15s, border-color 0.15s, opacity 0.15s;
}
.btn:hover:not(:disabled) { background: var(--ink); color: var(--paper); border-color: var(--ink); transform: translateY(-1px); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }
.btn-sm { height: 32px; padding: 0 12px; font-size: 12.5px; }
.btn-primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-primary:hover:not(:disabled) { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn-danger:hover:not(:disabled) { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; }
.btn-export-top {
  height: 30px; padding: 0 14px; background: var(--accent); border-color: var(--accent); color: var(--on-accent);
  font-family: var(--mono); font-size: 10.5px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
}
.btn-export-top:hover:not(:disabled) { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.icon-btn { display: grid; place-items: center; width: 32px; height: 32px; border: 0; background: transparent; color: var(--ink-mute); cursor: pointer; }
.icon-btn:hover { background: var(--paper-3); color: var(--ink); }

.seg { display: inline-flex; border: 1px solid var(--line-2); }
.seg-btn {
  display: inline-flex; align-items: center; gap: 8px; height: 32px; padding: 0 14px; border: 0; background: transparent; color: var(--ink-mute);
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.seg-btn + .seg-btn { border-left: 1px solid var(--line); }
.seg-btn:hover:not(:disabled) { color: var(--ink); background: var(--paper-3); }
.seg-btn[aria-checked="true"], .seg-btn[aria-checked="true"]:hover:not(:disabled) { background: var(--ink); color: var(--paper); }
.seg-btn:disabled { cursor: not-allowed; }
.seg.is-off { opacity: 0.4; }
.seg-fold .seg-btn { padding: 0 22px; font-weight: 600; }

.switch { display: inline-flex; align-items: center; gap: 10px; padding: 4px 2px; background: none; border: 0; color: var(--ink-mute); cursor: pointer; }
.switch-label { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; }
.switch:hover, .switch[aria-checked="true"] { color: var(--ink); }
.switch-track { position: relative; width: 34px; height: 18px; border: 1px solid var(--line-2); background: transparent; transition: background 0.2s, border-color 0.2s; }
.switch-thumb { position: absolute; top: 2px; left: 2px; width: 12px; height: 12px; background: var(--ink-mute); transition: transform 0.2s, background 0.2s; }
.switch[aria-checked="true"] .switch-track { background: var(--accent-dim); border-color: var(--accent); }
.switch[aria-checked="true"] .switch-thumb { transform: translateX(16px); background: var(--accent); }

/* ---- Uploader --------------------------------------------------------------------- */
.uploader { margin-bottom: 16px; position: relative; }
.dropzone {
  width: 100%; display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 22px 14px;
  background: transparent; border: 1px dashed var(--line-2); cursor: pointer; transition: background 0.15s, border-color 0.15s;
}
.dropzone:hover, .uploader.is-dragover .dropzone { background: var(--accent-dim); border-color: var(--accent); }
.dz-icon { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--line-2); color: var(--ink); margin-bottom: 6px; }
.dz-title { font-weight: 500; }
.dz-meta { font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em; color: var(--ink-mute); }
.loaded { display: flex; gap: 14px; align-items: center; padding: 10px; border: 1px solid var(--line); transition: border-color 0.15s, background 0.15s; }
.uploader.is-dragover .loaded { border-color: var(--accent); background: var(--accent-dim); }
.uploader.is-loading { opacity: 0.6; pointer-events: none; }
.thumb-wrap { height: 78px; max-width: 46%; overflow: hidden; background: #000; flex: none; border: 1px solid var(--line-2); }
.thumb { width: 100%; height: 100%; object-fit: cover; display: block; }
.file-info { min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.file-name { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-dims { font-family: var(--mono); font-size: 11px; color: var(--ink-mute); margin-bottom: 6px; font-variant-numeric: tabular-nums; }
.field-error { margin-top: 8px; color: var(--danger); font-size: 12.5px; }

/* ---- Image controls ------------------------------------------------------------------ */
.controls { display: flex; flex-direction: column; gap: 14px; transition: opacity 0.2s; }
.controls.is-disabled { opacity: 0.45; }
.fit-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.field-label { display: block; margin-bottom: 6px; }
.fit-row .field-label { margin: 0; }
.fit-row .seg-btn { height: 28px; padding: 0 14px; }
.bg-field { display: inline-flex; align-items: center; gap: 8px; margin-left: auto; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-mute); }
.color { width: 30px; height: 24px; padding: 0; border: 1px solid var(--line-2); background: none; cursor: pointer; }

.slider-label { display: block; margin-bottom: 2px; }
.slider-row { display: flex; align-items: center; gap: 12px; }
.num-wrap { display: inline-flex; align-items: center; gap: 3px; color: var(--ink-mute); font-family: var(--mono); font-size: 11px; }
.num {
  width: 62px; height: 28px; padding: 0 7px; text-align: right; font-family: var(--mono); font-size: 12px; font-variant-numeric: tabular-nums;
  background: var(--paper-3); border: 1px solid var(--line); -moz-appearance: textfield; appearance: textfield;
}
.num:focus { border-color: var(--accent); outline: none; }
.num::-webkit-outer-spin-button, .num::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.unit { width: 12px; }

.range { flex: 1; min-width: 0; height: 24px; margin: 0; background: transparent; -webkit-appearance: none; appearance: none; cursor: pointer; }
.range::-webkit-slider-runnable-track { height: 2px; background: var(--ink-dim); }
.range::-moz-range-track { height: 2px; background: var(--ink-dim); }
.range::-webkit-slider-thumb { -webkit-appearance: none; width: 12px; height: 16px; margin-top: -7px; border: 0; background: var(--ink); transition: background 0.15s; }
.range::-moz-range-thumb { width: 12px; height: 16px; border: 0; border-radius: 0; background: var(--ink); }
.range:hover:not(:disabled)::-webkit-slider-thumb, .range:focus-visible::-webkit-slider-thumb { background: var(--accent); }
.range:hover:not(:disabled)::-moz-range-thumb, .range:focus-visible::-moz-range-thumb { background: var(--accent); }
.range:disabled { cursor: not-allowed; }
.range:focus-visible { outline-offset: 4px; }

.controls-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.note { font-size: 12px; color: var(--ink-mute); }
.note.warn { color: var(--warn); }
.controls-foot .note { flex: 1; }

/* ---- Device info ------------------------------------------------------------------------ */
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 12px; }
.info-block h3 { margin-bottom: 6px; color: var(--accent); }
.info dl > div { display: flex; flex-direction: column; gap: 1px; padding: 6px 0; border-top: 1px solid var(--line); }
.info dd { font-family: var(--mono); font-size: 12px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.info-body { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 12px; }
.info-body > div { border-top: 1px solid var(--line); }

/* ---- Export popover --------------------------------------------------------------------- */
.popover {
  position: absolute; right: 0; top: calc(100% + 12px); z-index: 40; width: 372px; max-width: calc(100vw - 32px);
  background: var(--paper-2); border: 1px solid var(--line-2); padding: 14px 18px 18px; box-shadow: var(--shadow);
}
.popover-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.export-panel { display: flex; flex-direction: column; gap: 16px; }
.export-opts { display: flex; gap: 20px; flex-wrap: wrap; }
.export-opts .seg-btn { height: 28px; padding: 0 12px; }
.export-actions { display: flex; flex-direction: column; gap: 8px; }
.btn-export { height: 48px; justify-content: flex-start; padding: 0 16px; }
.btn-export .btn-sub { margin-left: auto; font-family: var(--mono); font-size: 11px; opacity: 0.7; font-weight: 400; letter-spacing: 0.02em; font-variant-numeric: tabular-nums; }
.export-status { min-height: 18px; font-size: 12.5px; color: var(--accent); }
.export-status.err { color: var(--danger); }

/* ---- Guides legend, empty state, hints ------------------------------------------------ */
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; list-style: none; }
.legend li { display: inline-flex; align-items: center; gap: 7px; }
.legend-note { margin-left: auto; color: var(--ink-dim); }
.swatch { width: 9px; height: 9px; }

.empty { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 18px 22px; background: var(--paper-2); border: 1px solid var(--line); }
.empty-text { flex: 1 1 340px; display: flex; flex-direction: column; gap: 8px; }
.empty-text h2 { font-family: var(--serif); font-size: clamp(26px, 2.6vw, 36px); font-weight: 400; line-height: 1.02; letter-spacing: -0.015em; max-width: 20ch; text-wrap: balance; }
.empty-text h2 em { color: var(--accent); }
.empty-text p { color: var(--ink-mute); font-size: 13px; max-width: 52ch; }
.empty-text .btn-row { margin-top: 8px; }
.empty-demo { display: flex; align-items: center; gap: 14px; }
.empty-demo figure { display: flex; flex-direction: column; gap: 6px; align-items: center; }
.es-thumb { height: 92px; border: 1px solid var(--line-2); background: var(--paper); display: block; object-fit: contain; }
.es-cover { aspect-ratio: 1248 / 1972; }
.es-inner { aspect-ratio: 2448 / 1848; }
.es-arrow { color: var(--accent); display: inline-flex; margin-bottom: 20px; }
.kbd-hint { text-align: center; text-transform: none; letter-spacing: 0.06em; color: var(--ink-dim); }
kbd { font-family: var(--mono); font-size: 10.5px; padding: 1px 6px; margin: 0 1px; border: 1px solid var(--line-2); color: var(--ink-mute); }

/* ---- Screens (flat) and Split modes ------------------------------------------------------ */
.pane-screens { display: flex; align-items: center; justify-content: center; gap: 28px; padding: 12px; }
.pane-screens.is-column { flex-direction: column; gap: 18px; }
.flat-fig { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.flat { position: relative; box-shadow: 0 0 0 1px var(--line-2), var(--shadow); }
.flat .screen { position: relative; width: 100%; height: 100%; }
figcaption { font-variant-numeric: tabular-nums; }
figcaption b { color: var(--ink); font-weight: 600; }

.pane-split { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 12px; }
.split-fig { display: flex; flex-direction: column; align-items: center; gap: 6px; min-height: 0; min-width: 0; }
.split-stage { position: relative; flex: 1; width: 100%; min-height: 0; }

/* ---- A single on-screen display (inside the phone, flat, or split) ----------------------- */
.screen { position: absolute; overflow: hidden; background: #000; }
.screen-canvas { display: block; width: 100%; height: 100%; }
.screen.editable { cursor: grab; touch-action: none; }
.is-panning .screen.editable { cursor: grabbing; }
.punch {
  position: absolute; aspect-ratio: 1; transform: translate(-50%, -50%); border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle at 35% 35%, #1d2230 0, #05060a 55%); box-shadow: 0 0 0 0.25vmin rgba(236, 232, 223, 0.05);
}
.crease {
  position: absolute; top: 0; bottom: 0; left: 50%; transform: translateX(-50%); pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.09) 36%, rgba(236, 232, 223, 0.03) 50%, rgba(0, 0, 0, 0.09) 64%, transparent);
  opacity: clamp(0, calc(1 - var(--fold, 0) * 5), 1);
}
.guides { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; opacity: 0; transition: opacity 0.2s; }
[data-guides="on"] .guides { opacity: 1; }

/* ---- The 3D phone ---------------------------------------------------------------------------- */
.phone-root { position: absolute; inset: 0; perspective: 2000px; }
.phone-scene { position: absolute; left: 50%; top: 50%; transform-style: preserve-3d; will-change: transform; }
.box, .pivot { position: absolute; top: 0; transform-style: preserve-3d; }
.pivot { width: 0; height: 0; transform-origin: 0 0; }
.face { position: absolute; inset: 0; backface-visibility: hidden; overflow: hidden; }
.face.front, .face.back {
  background: linear-gradient(180deg, #3d3a34, #2b2924 40%, #33302a);
  box-shadow: inset 0 0 0 1px rgba(236, 232, 223, 0.16);
}
.face.side { inset: auto; background: linear-gradient(180deg, #58554d, #302e29); }
.glass { position: absolute; background: #050403; }
.shade { position: absolute; inset: 0; background: #000; opacity: 0; pointer-events: none; }
.box-left .shade { opacity: var(--shade, 0); }
.box-right .front .shade { opacity: calc(var(--fold, 0) * 0.55); }
.fade-out-when-closed .glass, .fade-out-when-closed .screen { opacity: clamp(0, calc(1 - var(--fold, 0) * 4), 1); }
.box-hinge .face.front, .box-hinge .face.back { background: linear-gradient(90deg, #24221e, #58554d 45%, #2c2a25); }
/* Faces that touch another box are never visible from outside; the hinge's outer edge only shows once folded. */
.box-hinge .side-l { opacity: var(--fold, 0); }
.key { position: absolute; width: 4px; background: linear-gradient(90deg, #58554d, #38352f); }

.phone-shadow {
  position: absolute; left: 50%; top: 50%; height: 26px; transform: translateX(-50%); pointer-events: none;
  background: radial-gradient(closest-side, rgba(0, 0, 0, 0.7), transparent); filter: blur(7px);
}

/* Only the visible display can be dragged, and not while the phone is moving. */
.phone-root[data-fold="closed"] .screen[data-screen="inner"],
.phone-root[data-fold="open"] .screen[data-screen="cover"],
.phone-root[data-animating] .screen { pointer-events: none; }

/* ---- Responsive ---------------------------------------------------------------------------------- */
@media (max-width: 1180px) {
  .layout { grid-template-columns: minmax(0, 1fr) 350px; }
}

@media (max-width: 980px) {
  .layout { grid-template-columns: minmax(0, 1fr); padding-top: 16px; }
  .stage-col { position: static; height: auto; min-height: 0; }
  .stage { flex: none; height: clamp(300px, 74vw, 600px); }
  .app[data-view="split"] .stage { height: clamp(300px, 80vw, 620px); }
  .app[data-view="screens"] .stage { height: clamp(360px, 92vw, 720px); }
}

@media (max-width: 640px) {
  :root { --gutter: 20px; }
  .device-chip, .back-long { display: none; }
  .layout { gap: 16px; }
  .toolbar .seg-view { width: 100%; }
  .toolbar .seg-view .seg-btn { flex: 1; justify-content: center; padding: 0 8px; }
  .seg-fold .seg-btn { padding: 0 16px; }
  .app[data-view="split"] .stage { height: clamp(520px, 150vw, 760px); }
  .app[data-view="split"] .pane-split { grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; }
  .app[data-view="screens"] .stage { height: clamp(460px, 130vw, 720px); }
  .kbd-hint { display: none; }
  .empty { padding: 16px; }
  .es-thumb { height: 76px; }
  .popover { position: fixed; left: 12px; right: 12px; top: calc(var(--topbar) + 8px); width: auto; max-width: none; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; }
}