/* SmooGo Note — the Atelier on the web. Colours come from palettes.css (the app's StudyPalette). */
:root {
  color-scheme: light dark;
  --serif: ui-serif, "New York", "Iowan Old Style", "Charter", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --gutter: clamp(16px, 4.4vw, 56px);
  --wide: 1180px;
  --read: 680px;
  --glide: cubic-bezier(.22, .82, .26, 1);
  --tint: 640ms;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 84px; }
body {
  margin: 0;
  background-color: var(--canvas);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color var(--tint) var(--glide), color var(--tint) var(--glide);
}
/* Fine drawing-paper grid, the app's Rasterlinien. */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--rule) 55%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--rule) 55%, transparent) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(to bottom, #000 0, rgba(0,0,0,.55) 46vh, rgba(0,0,0,.18) 100vh);
  -webkit-mask-image: linear-gradient(to bottom, #000 0, rgba(0,0,0,.55) 46vh, rgba(0,0,0,.18) 100vh);
  opacity: .5;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { color: var(--signal); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; }
[hidden] { display: none !important; }
.wrap { width: 100%; max-width: calc(var(--wide) + 2 * var(--gutter)); margin: 0 auto; padding: 0 var(--gutter); }
.read { max-width: calc(var(--read) + 2 * var(--gutter)); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 50; background: var(--paper); padding: 8px 12px; border-radius: 8px; }

/* Header */
.bar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--canvas) 82%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(14px); backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
  transition: background-color var(--tint) var(--glide), border-color var(--tint) var(--glide);
}
.bar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 600 1rem/1 var(--sans); letter-spacing: -.01em; white-space: nowrap; }
.brand img { width: 30px; height: 30px; border-radius: 7px; box-shadow: 0 1px 0 rgba(0,0,0,.06), 0 4px 12px -6px rgba(0,0,0,.4); }
.nav { display: flex; gap: clamp(12px, 3vw, 28px); font-size: .9375rem; }
.nav a { color: var(--muted); text-decoration: none; white-space: nowrap; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
@media (max-width: 420px) { .nav .opt { display: none; } }

/* Shared type */
.eyebrow { font: 600 .72rem/1.3 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin: 0 0 14px; }
.display { font: 400 clamp(2.5rem, 6.4vw, 4.75rem)/1.02 var(--serif); letter-spacing: -.018em; margin: 0; text-wrap: balance; }
.lead { font: 400 clamp(1.15rem, 2.1vw, 1.375rem)/1.45 var(--serif); color: var(--muted); margin: 20px 0 0; max-width: 34ch; text-wrap: pretty; }
h2 { font: 400 clamp(1.9rem, 4vw, 2.75rem)/1.08 var(--serif); letter-spacing: -.012em; margin: 0; text-wrap: balance; }
h3 { font: 600 1.0625rem/1.35 var(--sans); margin: 0; }
p { margin: 0; text-wrap: pretty; }

/* Hero */
.hero { padding: clamp(36px, 7vw, 88px) 0 clamp(28px, 4vw, 48px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(28px, 5vw, 72px); align-items: center; }
.hero-copy .display { white-space: pre-line; }
.platforms { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; font-size: .9375rem; color: var(--muted); }
.chip { display: inline-flex; align-items: center; gap: 8px; padding: 7px 13px; border-radius: 999px; border: 1px solid var(--rule); background: var(--paper); color: var(--ink); font: 600 .75rem/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.chip i { width: 7px; height: 7px; border-radius: 50%; background: var(--signal); }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } .lead { max-width: 42ch; } }

/* Study stage */
.stage-card { position: relative; }
.stage {
  position: relative; aspect-ratio: 4 / 3; width: 100%;
  border-radius: 22px; overflow: hidden;
  background:
    radial-gradient(120% 90% at 50% 100%, color-mix(in srgb, var(--paper) 55%, transparent), transparent 70%),
    var(--hero);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--rule) 80%, transparent), 0 30px 60px -40px rgba(30, 20, 40, .45);
  touch-action: pan-y; cursor: ew-resize; user-select: none; -webkit-user-select: none;
  transition: background-color var(--tint) var(--glide);
}
.stage:focus-visible { outline-offset: 4px; }
.stage .frame { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; pointer-events: none; }
.stage svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; }
.stage .chart text { font: 500 9px var(--mono); fill: var(--muted); }
.stage .loading { position: absolute; left: 16px; bottom: 14px; font: 500 .7rem/1 var(--mono); letter-spacing: .1em; color: var(--muted); opacity: 0; transition: opacity .3s; }
.stage[data-loading="1"] .loading { opacity: .8; }
.stage.swap .frame, .stage.swap svg { animation: swap .62s var(--glide) both; }
@keyframes swap { from { opacity: 0; transform: translateY(10px) scale(.985); } to { opacity: 1; transform: none; } }

.readout { margin-top: 16px; display: grid; gap: 4px; min-height: 104px; }
.readout .legend { font: 600 .7rem/1.3 var(--mono); letter-spacing: .1em; color: var(--muted); }
.readout .row { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; min-height: 44px; }
.readout .primary { font: 300 clamp(1.9rem, 3.6vw, 2.5rem)/1.1 var(--mono); font-variant-numeric: tabular-nums; color: var(--ink); }
.readout .phase { font: 400 1.0625rem/1.2 var(--serif); color: var(--signal); }
.readout .detail { font: 500 .7rem/1.4 var(--mono); letter-spacing: .07em; color: var(--muted); }
.readout .rest {
  margin-left: auto; align-self: center; display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px; min-height: 32px; border-radius: 999px; border: 1px solid var(--rule); background: var(--paper);
  color: var(--accent); font: 600 .78rem/1 var(--sans); cursor: pointer;
  opacity: 0; transform: translateY(4px); pointer-events: none; transition: opacity .3s var(--glide), transform .3s var(--glide);
}
.readout .rest.on { opacity: 1; transform: none; pointer-events: auto; }
.readout .rest svg { width: 13px; height: 13px; }
.hint { margin-top: 2px; font: 500 .68rem/1.4 var(--mono); letter-spacing: .08em; color: var(--muted); opacity: .8; }

/* Discipline index */
.chooser { padding: clamp(24px, 4vw, 40px) 0 clamp(48px, 7vw, 96px); }
.chooser-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.chooser-head p { color: var(--muted); font-size: .9375rem; max-width: 46ch; }
.disciplines { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--rule); }
.disciplines li { border-bottom: 1px solid var(--rule); }
.disciplines li:not(:nth-child(4n)) { border-right: 1px solid var(--rule); }
.disciplines button {
  all: unset; -webkit-appearance: none; appearance: none; background: transparent; border: 0; color: inherit; font: inherit; text-align: left; box-sizing: border-box; display: grid; gap: 6px; width: 100%; height: 100%;
  padding: 18px 18px 20px; cursor: pointer; position: relative; transition: background-color .35s var(--glide);
}
.disciplines button:hover { background: color-mix(in srgb, var(--selection) 45%, transparent); }
.disciplines button:focus-visible { outline: 2px solid var(--signal); outline-offset: -2px; border-radius: 0; }
.disciplines .n { font: 500 .68rem/1 var(--mono); letter-spacing: .1em; color: var(--muted); }
.disciplines .t { font: 400 1.25rem/1.15 var(--serif); color: var(--ink); text-wrap: balance; }
.disciplines .p { font: 600 .68rem/1.4 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.disciplines button::after {
  content: ""; position: absolute; left: 18px; right: 18px; bottom: -1px; height: 2px; background: var(--signal);
  transform: scaleX(0); transform-origin: left; transition: transform .5s var(--glide);
}
.disciplines button[aria-pressed="true"] { background: color-mix(in srgb, var(--selection) 70%, transparent); }
.disciplines button[aria-pressed="true"] .t { color: var(--accent); }
.disciplines button[aria-pressed="true"]::after { transform: scaleX(1); }
@media (max-width: 900px) {
  .disciplines { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .disciplines li:not(:nth-child(4n)) { border-right: 0; }
  .disciplines li:nth-child(odd) { border-right: 1px solid var(--rule); }
  .disciplines .t { font-size: 1.0625rem; }
  .disciplines button { padding: 14px 12px 16px; }
}

/* Sections */
.section { padding: clamp(56px, 8vw, 112px) 0; border-top: 1px solid var(--rule); transition: border-color var(--tint) var(--glide); }
.section-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; align-items: end; margin-bottom: clamp(28px, 4vw, 48px); }
.section-head .obj { width: clamp(96px, 14vw, 168px); margin-bottom: -10px; filter: drop-shadow(0 18px 18px rgba(0,0,0,.12)); }
.section-head p { color: var(--muted); margin-top: 14px; max-width: 52ch; }

.legend-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(32px, 6vw, 88px); }
.legend-list li { display: grid; grid-template-columns: 44px minmax(0, 1fr); align-content: start; gap: 4px 12px; padding: 24px 0 28px; border-top: 1px solid var(--rule); }
.legend-list .n { font: 500 .75rem/1.6 var(--mono); color: var(--signal); letter-spacing: .06em; padding-top: 3px; }
.legend-list h3 { font: 400 1.375rem/1.2 var(--serif); letter-spacing: -.005em; }
.legend-list p { grid-column: 2; color: color-mix(in srgb, var(--ink) 84%, transparent); font-size: 1rem; }
@media (max-width: 760px) { .legend-list { grid-template-columns: 1fr; } }

.promise { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border: 1px solid var(--rule); border-radius: 18px; background: var(--paper); overflow: hidden; }
.promise div { padding: 22px 20px 24px; display: grid; gap: 12px; align-content: start; }
.promise div + div { border-left: 1px solid var(--rule); }
.promise svg { width: 24px; height: 24px; color: var(--accent); }
.promise p { font-weight: 500; font-size: .98rem; line-height: 1.45; }
.promise-foot { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 8px 24px; font-size: .9375rem; }
@media (max-width: 900px) {
  .promise { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .promise div:nth-child(3) { border-left: 0; }
  .promise div:nth-child(n+3) { border-top: 1px solid var(--rule); }
}
@media (max-width: 420px) {
  .promise { grid-template-columns: 1fr; }
  .promise div + div { border-left: 0; border-top: 1px solid var(--rule); }
}

/* Long-form pages (privacy, support) */
.page-hero { padding: clamp(40px, 8vw, 96px) 0 clamp(24px, 4vw, 40px); }
.page-hero .lead { max-width: 40ch; }
.summary { margin: 8px 0 0; padding: 20px 22px; border: 1px solid var(--rule); border-radius: 16px; background: var(--paper); display: grid; gap: 12px; }
.summary div { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 12px; align-items: start; font-weight: 500; font-size: .98rem; line-height: 1.45; }
.summary svg { width: 20px; height: 20px; color: var(--accent); margin-top: 1px; }
.topics { margin: clamp(32px, 5vw, 48px) 0 0; display: grid; gap: 30px; }
.topic { display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 6px 14px; }
.topic svg { width: 22px; height: 22px; color: var(--accent); margin-top: 2px; grid-row: span 2; }
.topic > :not(svg) { grid-column: 2; }
.topic h2 { font: 600 1.0625rem/1.35 var(--sans); letter-spacing: 0; }
.topic p { color: color-mix(in srgb, var(--ink) 86%, transparent); }
.topic p + p { margin-top: 10px; }
.box { margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--rule); display: grid; gap: 6px; }
.box h2 { font: 600 1.0625rem/1.35 var(--sans); letter-spacing: 0; }
.stand { margin-top: 28px; font: 500 .72rem/1.4 var(--mono); letter-spacing: .08em; color: var(--muted); text-transform: uppercase; }

.contact { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 20px; align-items: center; padding: clamp(20px, 3vw, 28px); border: 1px solid var(--rule); border-radius: 18px; background: var(--paper); }
.contact .mail { font: 400 clamp(1.25rem, 3.4vw, 1.75rem)/1.2 var(--serif); color: var(--ink); text-decoration: none; overflow-wrap: anywhere; }
.contact .mail:hover { color: var(--signal); }
.contact p { color: var(--muted); font-size: .9375rem; margin-top: 6px; }
.contact img { width: clamp(72px, 12vw, 112px); filter: drop-shadow(0 14px 14px rgba(0,0,0,.12)); }
@media (max-width: 520px) { .contact { grid-template-columns: 1fr; } .contact img { display: none; } }

.faq { margin-top: clamp(36px, 5vw, 56px); border-top: 1px solid var(--rule); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary {
  list-style: none; cursor: pointer; display: grid; grid-template-columns: minmax(0, 1fr) 20px; gap: 16px; align-items: center;
  padding: 20px 0; font: 400 1.25rem/1.3 var(--serif); color: var(--ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary svg { width: 18px; height: 18px; color: var(--muted); transition: transform .35s var(--glide); }
.faq details[open] summary svg { transform: rotate(45deg); color: var(--signal); }
.faq .answer { padding: 0 36px 24px 0; display: grid; gap: 10px; color: color-mix(in srgb, var(--ink) 86%, transparent); }
.faq .answer b { font-weight: 600; color: var(--ink); }
.path { font: 500 .9rem/1.4 var(--mono); color: var(--accent); white-space: nowrap; }

/* Footer */
.foot { margin-top: clamp(48px, 8vw, 96px); padding: 32px 0 40px; border-top: 1px solid var(--rule); color: var(--muted); font-size: .875rem; }
.foot .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px 32px; align-items: start; }
.foot nav { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: flex-end; }
.foot nav a { color: var(--muted); text-decoration: none; }
.foot nav a:hover { color: var(--ink); }
.foot .brand { font-size: .9375rem; }
.foot .fine { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px 18px; font: 500 .72rem/1.5 var(--mono); letter-spacing: .04em; }
@media (max-width: 600px) { .foot .wrap { grid-template-columns: 1fr; } .foot nav { justify-content: flex-start; } }

/* Arrival: staggered like AtelierMotion.arrive */
.arrive { animation: arrive .9s var(--glide) both; animation-delay: calc(var(--i, 0) * 90ms); }
@keyframes arrive { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.retint { animation: retint .62s var(--glide) both; }
@keyframes retint { from { opacity: 0; transform: translateY(8px); filter: blur(3px); } to { opacity: 1; transform: none; filter: none; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-delay: 0ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}