/* Markwell landing site — the front door, set like a printed flyleaf of the app.
   Same paper, ink, and teal as the product (gui/assets/style.css §:root, mirrored
   the same way render/html.py ports them to a standalone artifact), so the site
   reads as page one of the library. Discipline, as everywhere in Markwell:
   no scripts, no external resources, system font stacks only — every asset is
   served from this folder (see _headers: default-src 'none'). Light tokens,
   then dark via prefers-color-scheme; the print block stays LAST in source so
   its black-on-white tokens win when printing from a dark-mode browser. */
:root {
  color-scheme: light dark;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", "PingFang TC", "PingFang SC", "Microsoft JhengHei",
    "Noto Sans CJK TC", sans-serif;
  --font-read: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia,
    "Songti TC", "Songti SC", "Noto Serif CJK TC", "Source Han Serif", serif;

  --bg: #faf8f3;
  --surface: #ffffff;
  --surface-2: #f3efe7;
  --ink: #221f1b;
  --ink-soft: #57514a;
  --ink-faint: #6f685e;
  --line: #e8e1d5;
  --accent: #2e7d6b;
  --accent-ink: #205a4d;
  --accent-soft: #e4f0ec;
  --shadow-sm: 0 1px 2px rgba(40, 33, 22, .05);
  --shadow: 0 1px 2px rgba(40, 33, 22, .05), 0 10px 30px rgba(40, 33, 22, .07);
  --r: 14px;
  --r-sm: 9px;

  /* green highlighter ink — the product's own mark, swept across the headline
     (gui/assets/style.css .marker-em). Flips with the theme. */
  --marker: rgba(46, 125, 107, .22);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15130f;
    --surface: #201d18;
    --surface-2: #1a1713;
    --ink: #ece6dc;
    --ink-soft: #b7afa3;
    --ink-faint: #9a9286;
    --line: #322c24;
    --accent: #1a7d6a;
    --accent-ink: #8ad6c4;
    --accent-soft: #1d2a26;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 34px rgba(0, 0, 0, .4);
    --marker: rgba(138, 214, 196, .20);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  font-family: var(--font-read);
  font-weight: 650;
  line-height: 1.3;
  letter-spacing: -.01em;
  text-wrap: balance;
}

a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: .92em;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 8px;
  white-space: nowrap;
}

figure { margin: 0; }

/* the headline carries the product's own highlighter sweep — ink on the lower
   40% of the line, like a marker (same recipe as the app's .marker-em) */
mark {
  background: linear-gradient(transparent 60%, var(--marker) 60%);
  color: inherit;
  padding: 0 .04em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.skip-link {
  position: absolute; left: 12px; top: -48px; z-index: 50;
  background: var(--accent); color: #fff; padding: 8px 14px;
  border-radius: var(--r-sm); transition: top .15s;
}
.skip-link:focus { top: 12px; }

:focus-visible {
  outline: 2.5px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}
[tabindex="-1"]:focus-visible { outline: none; }

/* ---- measure ---- */
.wrap { max-width: 880px; margin-inline: auto; padding-inline: clamp(18px, 4vw, 32px); }
.wrap-narrow { max-width: 680px; margin-inline: auto; padding-inline: clamp(18px, 4vw, 32px); }

/* ---- top bar: the language switcher, always in the same corner ---- */
.top {
  max-width: 1100px; margin-inline: auto;
  display: flex; justify-content: flex-end;
  padding: 20px clamp(18px, 4vw, 32px) 0;
}
.langs { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px 18px; font-size: .88rem; }
.langs a { color: var(--ink-soft); }
.langs a:hover { color: var(--accent-ink); }
.langs strong { color: var(--ink); font-weight: 650; }

/* ---- hero: a frontispiece — fleuron, wordmark, motto, headline ---- */
.hero { text-align: center; padding-top: clamp(44px, 8vw, 84px); }
.fleuron {
  margin: 0 0 10px; color: var(--accent);
  font-family: var(--font-read); font-size: 1.7rem; line-height: 1;
}
.wordmark {
  margin: 0 0 14px; color: var(--ink);
  font-weight: 650; font-size: .95rem;
  letter-spacing: .34em; text-indent: .34em; /* re-center: tracking trails the last glyph */
  text-transform: uppercase;
}
.motto {
  margin: 0 0 22px; color: var(--ink-faint);
  font-family: var(--font-read); font-style: italic; font-size: 1.05rem;
}
.hero h1 {
  font-size: clamp(2.05rem, 5.4vw, 3.1rem);
  margin: 0 auto 18px; max-width: 17em;
}
.promise {
  color: var(--ink-soft); font-size: 1.08rem; line-height: 1.7;
  max-width: 54ch; margin: 0 auto 26px;
}

.trust {
  list-style: none; margin: 0 0 34px; padding: 0;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 10px;
}
.trust li {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 15px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface);
  box-shadow: var(--shadow-sm);
  font-size: .85rem; font-weight: 550; color: var(--ink-soft);
}
.trust li::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent); flex: none;
}

.dl { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin: 0 0 16px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font: inherit; font-weight: 600; font-size: 1.05rem; text-decoration: none;
  padding: 15px 26px; border-radius: 12px;
  background: var(--accent); border: 1px solid var(--accent); color: #fff;
  box-shadow: var(--shadow-sm);
  transition: background .13s, border-color .13s, transform .05s;
}
.btn:hover { background: var(--accent-ink); border-color: var(--accent-ink); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn svg {
  width: 19px; height: 19px; flex: none;
  fill: none; stroke: currentColor; stroke-width: 1.9;
  stroke-linecap: round; stroke-linejoin: round;
}
.dl-hint { margin: 0 0 10px; color: var(--ink-faint); font-size: .9rem; }
.cmdline { margin: 0; color: var(--ink-faint); font-size: .9rem; }

/* ---- screenshots in a calm frame ---- */
.shot { margin-top: clamp(36px, 6vw, 56px); }
.shot .frame {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); padding: clamp(8px, 1.6vw, 14px);
  box-shadow: var(--shadow);
}
.shot img { display: block; width: 100%; height: auto; border-radius: 8px; }
.shot figcaption {
  margin-top: 12px; text-align: center;
  color: var(--ink-faint); font-size: .85rem; font-style: italic;
}

/* ---- sections ---- */
section h2 { font-size: 1.6rem; text-align: center; margin: 0 0 12px; }
.section-sub {
  text-align: center; color: var(--ink-soft);
  max-width: 56ch; margin: 0 auto 28px;
}
.features, .firstlaunch, .uninstall, .yours { margin-top: clamp(56px, 10vw, 96px); }

/* ---- six quiet cards ---- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 30px; }
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); padding: 20px 20px 22px;
  box-shadow: var(--shadow-sm);
}
.card h3 { font-size: 1.04rem; margin: 0 0 8px; }
.card h3::before { content: "❊"; color: var(--accent); font-weight: 400; margin-right: .45em; }
.card p { margin: 0; color: var(--ink-soft); font-size: .95rem; line-height: 1.65; }

/* ---- first launch (unsigned downloads) ---- */
details {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-sm); margin-top: 12px;
}
summary { padding: 14px 18px; cursor: pointer; font-weight: 650; }
summary::marker { color: var(--accent); }
details[open] > summary { border-bottom: 1px solid var(--line); }
.details-body { padding: 14px 18px 6px; color: var(--ink-soft); font-size: .95rem; line-height: 1.7; }
.details-body p { margin: 0 0 12px; }
.details-body strong { color: var(--ink); font-weight: 650; }
.fallback-line { margin: 20px 0 0; text-align: center; color: var(--ink-faint); font-size: .9rem; }

/* ---- remove it any time · your data stays yours ---- */
.uninstall, .yours { text-align: center; }
.uninstall p, .yours p { margin: 0 auto; max-width: 58ch; color: var(--ink-soft); line-height: 1.75; }
.uninstall p + p { margin-top: 14px; }
.yours a { text-decoration: underline; text-underline-offset: 3px; }

/* ---- ornament + footer ---- */
.orn {
  margin: clamp(56px, 10vw, 96px) 0 0; text-align: center;
  color: var(--accent); font-family: var(--font-read); font-size: 1.05rem;
}
.site-foot { padding: 24px 0 48px; text-align: center; }
.site-foot p {
  margin: 0; padding-inline: clamp(18px, 4vw, 32px);
  color: var(--ink-faint); font-size: .85rem; line-height: 2;
}
.site-foot a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }
.site-foot a:hover { color: var(--accent-ink); }

/* ---- one breakpoint: hand-sized screens ---- */
@media (max-width: 720px) {
  .cards { grid-template-columns: 1fr; }
  .dl { flex-direction: column; align-items: stretch; max-width: 320px; margin-inline: auto; }
  .top { justify-content: center; }
  .langs { justify-content: center; }
}

/* ---- paper edition — black on white; backgrounds don't print, borders do.
   Stays last in source: when printing from a dark browser both media queries
   match, and source order must let these tokens win. ---- */
@media print {
  :root {
    --bg: #fff; --surface: #fff; --surface-2: #fff;
    --ink: #000; --ink-soft: #333; --ink-faint: #555;
    --line: #999; --accent: #000; --accent-ink: #000; --accent-soft: #fff;
    --marker: transparent; --shadow: none; --shadow-sm: none;
  }
  body { font-size: 11.5pt; }
  .skip-link { display: none; }
  .btn { background: none; color: #000; border-color: #999; }
  a { color: #000; }
}