/* PaperKit — landing and policy pages.
   A pale blue desk with white sheets on it; the hero sheet wears the real
   paper the visitor picks. Colors from the app icon: ink blue, margin red. */

@font-face {
  font-family: "Bricolage Grotesque";
  src: url("fonts/bricolage-grotesque-latin-800-normal.woff2") format("woff2");
  font-weight: 800;
  font-display: swap;
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("fonts/atkinson-hyperlegible-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("fonts/atkinson-hyperlegible-latin-700-normal.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}

:root {
  --desk: #dfe8f5;
  --sheet: #ffffff;
  --ink: #1f3a66;
  --ink-soft: #4b5d7d;
  --rule: #c3d2e9;
  --margin: #e58b8b;
  --gold: #e0a43a;
  --button: #1f3a66;
  --on-button: #ffffff;
  --focus: #2c63d6;
  --shadow: 31 58 102;

  --display: "Bricolage Grotesque", system-ui, sans-serif;
  --body: "Atkinson Hyperlegible", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  --wrap: 72rem;
  --gutter: clamp(16px, 4vw, 40px);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --desk: #131c2e;
    --ink: #e8eef9;
    --ink-soft: #a8b6cf;
    --rule: #2c3b57;
    --button: #c9d9f5;
    --on-button: #13213b;
    --focus: #8fb4ff;
    --shadow: 0 0 0;
    color-scheme: dark;
  }
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--desk);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--body);
}

.wrap {
  width: min(100% - 2 * var(--gutter), var(--wrap));
  margin-inline: auto;
}

a { color: inherit; text-underline-offset: 3px; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus { left: 16px; top: 16px; background: var(--sheet); color: #1f3a66; padding: 8px 12px; z-index: 10; }

h1, h2, h3 { margin: 0; line-height: 1.1; }
h1, h2 { font-family: var(--display); font-weight: 800; letter-spacing: -0.02em; }
h3 { font-size: 1.0625rem; font-weight: 700; }

/* ---- Header / footer ----------------------------------------------- */

.site-header { padding-block: 18px; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 800 1.35rem/1 var(--display);
  text-decoration: none;
}
.logo { border-radius: 7px; }

.site-nav { display: flex; align-items: center; gap: 6px 20px; flex-wrap: wrap; font-weight: 700; }
.site-nav a { text-decoration: none; }
.site-nav a:hover { text-decoration: underline; }

.nav-cta,
.button {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--button);
  color: var(--on-button);
  font-weight: 700;
  text-decoration: none;
}
.nav-cta:hover,
.button:hover { text-decoration: none; filter: brightness(1.12); }

.site-footer { padding-block: 32px 48px; color: var(--ink-soft); font-size: 0.9375rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; border-top: 1px solid var(--rule); padding-top: 24px; }
.site-footer p { margin: 0; }
.site-footer nav { display: flex; gap: 20px; }

/* ---- Hero: the sheet is the demo ------------------------------------ */

.hero { padding-block: clamp(24px, 6vw, 72px) clamp(40px, 7vw, 88px); }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
}

.eyebrow,
.try-label,
.sheet-caption,
.tag,
.chip {
  font-family: var(--mono);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}

h1 { font-size: clamp(2.5rem, 6vw, 4.4rem); }

.lede {
  margin: 20px 0 0;
  max-width: 34rem;
  font-size: 1.1875rem;
  color: var(--ink-soft);
}

.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; margin-top: 28px; font-weight: 700; }

.try-label { margin: 36px 0 10px; font-size: 0.8125rem; color: var(--ink-soft); }

.chips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 6px 12px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font-size: 0.8125rem;
  cursor: pointer;
}
.chip:hover { border-color: var(--ink-soft); }
.chip[aria-pressed="true"] { background: var(--button); border-color: var(--button); color: var(--on-button); }
.chip[data-premium="true"]::after { content: " ★"; color: var(--gold); }

.sheet-wrap { margin: 0; justify-self: center; width: min(100%, 440px); }

/* An A4 sheet with three binder holes: the paper the visitor picks. */
.sheet {
  position: relative;
  aspect-ratio: 210 / 297;
  background-color: var(--sheet);
  background-size: 100% 100%;
  border-radius: 3px;
  transform: rotate(1.5deg);
  box-shadow:
    0 1px 2px rgb(var(--shadow) / 0.14),
    0 28px 50px -18px rgb(var(--shadow) / 0.45);
  transition: background-image 0.2s ease;
}

.holes {
  position: absolute;
  left: 3.5%;
  top: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
}
.holes i {
  display: block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--desk);
  box-shadow: inset 0 1px 2px rgb(var(--shadow) / 0.35);
}

.sheet-caption {
  margin-top: 18px;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--ink-soft);
}

/* ---- Sections ------------------------------------------------------- */

section h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); }

.how,
.papers,
.modes { padding-block: clamp(40px, 7vw, 80px); border-top: 1px solid var(--rule); }

.steps {
  list-style: none;
  counter-reset: step;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.steps li {
  counter-increment: step;
  padding: 22px 22px 20px;
  background: var(--sheet);
  color: #1f3a66;
  border-radius: 4px;
  border-left: 3px solid var(--margin);
  box-shadow: 0 10px 24px -16px rgb(var(--shadow) / 0.5);
}
.steps li::before {
  content: counter(step);
  display: block;
  margin-bottom: 10px;
  font: 800 1.6rem/1 var(--display);
  color: var(--margin);
}
.steps p { margin: 8px 0 0; color: #4b5d7d; }

.section-lede { margin: 12px 0 0; max-width: 40rem; color: var(--ink-soft); }

.cards {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.card {
  overflow: hidden;
  background: var(--sheet);
  color: #1f3a66;
  border-radius: 4px;
  box-shadow: 0 10px 24px -16px rgb(var(--shadow) / 0.5);
}
/* A close-up of the top-left of the A4 sheet, so the pattern reads. */
.swatch {
  aspect-ratio: 4 / 3;
  background-color: #fff;
  background-size: 260% auto;
  background-position: 0 0;
  border-bottom: 1px solid #e3eaf5;
}
.card-text { padding: 14px 16px 16px; }
.card h3 { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.card p { margin: 6px 0 0; font-size: 0.9375rem; color: #4b5d7d; }

.tag {
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid #c3d2e9;
  font-size: 0.6875rem;
  text-transform: uppercase;
  color: #4b5d7d;
}
.tag-premium { border-color: #e0a43a; color: #8a5a0a; background: #fdf3e0; }

.note { margin: 24px 0 0; max-width: 46rem; font-size: 0.9375rem; color: var(--ink-soft); }

.modes-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr;
  gap: 24px 40px;
  align-items: start;
}
.mode p { margin: 8px 0 0; color: var(--ink-soft); }

.closing { padding-block: clamp(40px, 7vw, 80px); text-align: center; border-top: 1px solid var(--rule); }
.closing p { margin: 18px 0 0; color: var(--ink-soft); }

/* ---- Policy pages: a sheet with a margin line ---------------------- */

.doc { padding-block: 24px 56px; }
.doc-sheet {
  max-width: 46rem;
  margin-inline: auto;
  padding: clamp(28px, 5vw, 56px) clamp(24px, 5vw, 64px);
  background: var(--sheet);
  color: #1f3a66;
  border-left: 3px solid var(--margin);
  border-radius: 3px;
  box-shadow: 0 20px 40px -24px rgb(var(--shadow) / 0.5);
}
.doc-sheet h1 { font-size: clamp(2rem, 5vw, 2.8rem); }
.doc-sheet h2 { margin-top: 28px; font-family: var(--body); font-size: 1.1875rem; font-weight: 700; letter-spacing: 0; }
.doc-sheet p { margin: 8px 0 0; color: #33476b; }
.doc-sheet .intro { margin-top: 18px; font-size: 1.125rem; }
.updated { font-family: var(--mono); font-size: 0.8125rem; }

/* ---- Small screens -------------------------------------------------- */

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .sheet-wrap { width: min(100%, 360px); }
  .steps { grid-template-columns: 1fr; }
  .modes-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sheet { transition: none; }
}