/* Margin site: the app's Paper theme in light, Ink in dark. System fonts only, like the app. */
:root {
  --ground: #F3F0EA;
  --surface: #FBF9F5;
  --ink: #1C1B19;
  --muted: #6B6860;
  --rule: #DEDAD1;
  --accent: #A9442A;
  --accent-soft: #EEDDD4;
  --bezel: #1C1B19;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  --font-serif: ui-serif, "New York", "Iowan Old Style", "Charter", Georgia, serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ground: #121211; --surface: #1B1B19; --ink: #ECE9E2; --muted: #9C988E; --rule: #2C2B28;
    --accent: #E3876A; --accent-soft: #3A251E; --bezel: #050505;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(1120px, 100%); margin: 0 auto; padding-inline: 20px; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  background: color-mix(in srgb, var(--ground) 82%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.brand {
  display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink);
  font-family: var(--font-serif); font-weight: 400; font-size: 1.35rem; letter-spacing: -0.01em;
}
.brand img { width: 28px; height: 28px; border-radius: 7px; box-shadow: 0 0 0 1px var(--rule); }
.nav-links { display: flex; gap: 22px; font-size: 0.95rem; }
.nav-links a { color: var(--muted); text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
@media (max-width: 560px) { .nav-links .optional { display: none; } }

/* Type */
h1, h2, h3 { font-family: var(--font-serif); font-weight: 400; text-wrap: balance; }
h1 { font-size: clamp(2.6rem, 5.6vw, 4.2rem); line-height: 1.02; letter-spacing: -0.025em; margin: 0 0 24px; }
h1 em, h2 em { font-style: italic; color: var(--accent); }
h2 { font-size: clamp(1.9rem, 4vw, 2.7rem); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 14px; }
h3 { font-size: 1.3rem; letter-spacing: -0.01em; margin: 0 0 6px; }
.label {
  display: block; margin-bottom: 12px;
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent);
}
.lede { font-size: 1.18rem; color: var(--muted); max-width: 33em; margin: 0 0 32px; }

/* Buttons */
.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.cta-note { font-size: 0.88rem; color: var(--muted); margin-top: 16px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 22px; border-radius: 999px;
  font-weight: 500; font-size: 1rem; text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--ink); color: var(--ground); }
.btn-primary:hover { background: var(--accent); color: #fff; }
.btn-ghost { color: var(--ink); border: 1px solid var(--rule); }
.btn-ghost:hover { color: var(--ink); border-color: var(--muted); }

/* Hero: the margin rule from the icon runs down the left of the copy. */
.hero { padding-block: 72px 56px; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
.margin-rule { border-left: 3px solid var(--accent); padding-left: clamp(20px, 3.5vw, 44px); }
.eyebrow { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin: 0 0 22px; }
@media (max-width: 900px) {
  .hero { padding-top: 44px; }
  .hero .wrap { grid-template-columns: minmax(0, 1fr); }
}

/* Phone mockup. Each screen takes its colours and typeface from data-theme and data-face. */
.phone {
  width: 300px; max-width: 100%; margin: 0 auto;
  padding: 9px; border-radius: 50px; background: var(--bezel);
  box-shadow: 0 1px 0 1px rgba(255,255,255,0.06) inset, 0 34px 70px -28px rgba(28, 27, 25, 0.55);
}
.screen {
  --wall: #F3F0EA; --w-ink: #1C1B19; --w-muted: #6B6860; --w-accent: #A9442A;
  --w-font: var(--font-sans); --w-scale: 1;
  position: relative; aspect-ratio: 9 / 19.5; border-radius: 41px; overflow: hidden;
  background: var(--wall); color: var(--w-ink); font-family: var(--w-font);
  padding: 58px 22px 26px; display: flex; flex-direction: column; gap: 30px;
  transition: background 0.35s ease, color 0.35s ease;
}
.screen[data-theme="ink"] { --wall: #121211; --w-ink: #ECE9E2; --w-muted: #9C988E; --w-accent: #E3876A; }
.screen[data-theme="sage"] { --wall: #DDE3D8; --w-ink: #1F2A22; --w-muted: #56614F; --w-accent: #8A3F24; }
.screen[data-theme="dusk"] { --wall: #2A2833; --w-ink: #EDE8F2; --w-muted: #A9A3B3; --w-accent: #F0A58A; }
.screen[data-face="serif"] { --w-font: var(--font-serif); }
.screen[data-face="mono"] { --w-font: var(--font-mono); --w-scale: 0.88; }
.screen[data-align="center"] { text-align: center; }
.screen::before { /* status bar */
  content: ""; position: absolute; top: 14px; left: 50%; translate: -50% 0;
  width: 92px; height: 26px; border-radius: 20px; background: #000;
}
.w-clock { font-size: calc(52px * var(--w-scale)); font-weight: 300; line-height: 1; letter-spacing: -0.02em; }
.w-date { font-size: calc(14px * var(--w-scale)); margin-top: 8px; }
.w-info { font-size: calc(12.5px * var(--w-scale)); color: var(--w-muted); margin-top: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.w-info b, .w-accent { color: var(--w-accent); font-weight: inherit; }
.w-apps { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: calc(21px * var(--w-scale)); line-height: 1.3; }
.w-note { margin-top: auto; font-size: calc(13px * var(--w-scale)); font-style: italic; color: var(--w-muted); }
.w-caption { font-size: calc(10.5px * var(--w-scale)); letter-spacing: 0.12em; text-transform: uppercase; color: var(--w-muted); }

/* Sections */
section { padding-block: 72px; }
.section-head { max-width: 44em; margin-bottom: 40px; }
.section-head p { color: var(--muted); margin: 0; font-size: 1.08rem; }

/* Principles */
.principles { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); border-top: 1px solid var(--rule); }
.principles div { padding: 26px 28px 26px 0; border-bottom: 1px solid var(--rule); }
.principles strong { display: block; font-family: var(--font-serif); font-weight: 400; font-size: 1.35rem; margin-bottom: 6px; }
.principles span { color: var(--muted); font-size: 0.97rem; }

/* Widget gallery: each tile is drawn the way the widget draws itself. */
.widgets { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 22px; }
.widget-card { display: flex; flex-direction: column; gap: 16px; }
.tile {
  --wall: #F3F0EA; --w-ink: #1C1B19; --w-muted: #6B6860; --w-accent: #A9442A; --w-font: var(--font-sans); --w-scale: 1;
  background: var(--wall); color: var(--w-ink); font-family: var(--w-font);
  border: 1px solid var(--rule); border-radius: 26px; padding: 20px 22px; height: 170px;
  display: flex; flex-direction: column; overflow: hidden;
}
@media (prefers-color-scheme: dark) {
  .tile { --wall: #1B1B19; --w-ink: #ECE9E2; --w-muted: #9C988E; --w-accent: #E3876A; }
}
.tile .w-clock { font-size: 44px; }
.tile .w-apps { grid-template-columns: 1fr 1fr; column-gap: 18px; font-size: 17px; gap: 3px 18px; }
.tile .spacer { flex: 1; }
.tile.lock { align-items: flex-start; justify-content: center; gap: 14px; }
.lock-rect { border-radius: 14px; background: color-mix(in srgb, var(--w-ink) 9%, transparent); padding: 8px 12px; font-size: 13px; line-height: 1.35; }
.lock-row { display: flex; gap: 12px; align-items: center; }
.lock-circle {
  width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center;
  background: color-mix(in srgb, var(--w-ink) 9%, transparent); font-size: 12px; text-align: center; line-height: 1.1;
}
.widget-card h3 { margin: 0; }
.widget-card p { margin: 0; color: var(--muted); font-size: 0.96rem; }
.sizes { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); }

/* Theme picker */
.styler { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.controls { display: grid; gap: 26px; margin-top: 8px; }
.control > span { display: block; font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.choices { display: flex; flex-wrap: wrap; gap: 8px; }
.choices button {
  font: inherit; font-size: 0.95rem; color: var(--ink); background: transparent; cursor: pointer;
  border: 1px solid var(--rule); border-radius: 999px; padding: 8px 16px;
  display: inline-flex; align-items: center; gap: 8px;
}
.choices button:hover { border-color: var(--muted); }
.choices button[aria-pressed="true"] { border-color: var(--ink); background: var(--surface); }
.swatch { width: 14px; height: 14px; border-radius: 50%; border: 1px solid rgba(0,0,0,0.15); }
@media (max-width: 860px) { .styler { grid-template-columns: minmax(0, 1fr); gap: 40px; } }

/* Lists and Focus */
.lists { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 18px; }
.list {
  background: var(--surface); border: 1px solid var(--rule); border-radius: 22px; padding: 22px 24px;
}
.list .focus { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.list h3 { margin: 6px 0 12px; }
.list ul { list-style: none; padding: 0; margin: 0; color: var(--muted); font-size: 0.97rem; line-height: 1.75; }

/* Privacy band */
.band { background: #121211; color: #ECE9E2; }
.band .label { color: #E3876A; }
.band .section-head p, .band .principles span { color: #9C988E; }
.band .principles, .band .principles div { border-color: #2C2B28; }
.band a { color: #E3876A; }
.band a:hover { color: #ECE9E2; }

/* FAQ */
.faq { display: grid; gap: 0; max-width: 820px; border-top: 1px solid var(--rule); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary {
  cursor: pointer; list-style: none; padding: 20px 0; font-size: 1.08rem; font-weight: 500;
  display: flex; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--font-mono); color: var(--accent); font-size: 1.25rem; line-height: 1.2; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 20px; color: var(--muted); max-width: 40em; }
code {
  font-family: var(--font-mono); font-size: 0.86em; background: var(--accent-soft); color: var(--ink);
  padding: 2px 6px; border-radius: 5px;
}

/* Closing */
.closing { text-align: center; }
.closing img { width: 88px; height: 88px; border-radius: 20px; margin: 0 auto 26px; box-shadow: 0 16px 36px -16px rgba(28, 27, 25, 0.45); }
.closing .cta { justify-content: center; }
.closing p { color: var(--muted); max-width: 32em; margin: 0 auto 28px; font-size: 1.1rem; }

/* Footer */
footer { border-top: 1px solid var(--rule); padding-block: 32px 48px; font-size: 0.9rem; color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px 32px; }
footer nav { display: flex; gap: 20px; }
footer a { color: var(--muted); }

/* Prose pages */
.prose { max-width: 720px; padding-block: 56px 80px; }
.prose h1 { font-size: clamp(2.4rem, 5vw, 3.3rem); margin-bottom: 8px; }
.prose .updated { font-family: var(--font-mono); font-size: 0.8rem; color: var(--muted); margin: 0 0 36px; }
.prose h2 { font-size: 1.6rem; margin: 44px 0 10px; }
.prose h3 { font-size: 1.2rem; margin: 28px 0 6px; }
.prose p, .prose li { color: var(--muted); }
.prose strong { color: var(--ink); font-weight: 600; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin-bottom: 6px; }
.toc { list-style: none; padding: 0 !important; display: flex; flex-wrap: wrap; gap: 8px 22px; }
.callout {
  background: var(--surface); border: 1px solid var(--rule); border-left: 3px solid var(--accent);
  border-radius: 12px; padding: 18px 22px; margin: 24px 0;
}
.callout p { margin: 0; color: var(--ink); }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }