/* mk's feature page. The colours are the app's own, from src/styles.css. */

:root {
  --sans: "Inter", "Segoe UI", system-ui, -apple-system, "Noto Sans", Ubuntu, Cantarell, sans-serif;
  --mono: "JetBrains Mono", "Fira Code", "Cascadia Code", "SF Mono", "DejaVu Sans Mono", ui-monospace, monospace;

  --bg: #fcfcfb;
  --bg-sunk: #f4f4f2;
  --bg-raised: #ffffff;
  --fg: #1d2127;
  --heading: #0f1419;
  --muted: #59606b;
  --faint: #8e96a1;
  --border: #e3e3df;
  --border-strong: #cfcfc9;
  --accent: #3563e9;
  --accent-soft: #3563e91a;
  --on-accent: #ffffff;
  --link: #2e5bd8;
  --code: #b3325a;
  --code-bg: #f1f1ee;
  --shadow: 0 24px 60px #0f14191f, 0 4px 12px #0f141914;
  --hp-spelling: #d93a41;
  --hp-grammar: #c98500;
  --hp-style: #2f7ae5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181d;
    --bg-sunk: #111317;
    --bg-raised: #1f2229;
    --fg: #d6d9df;
    --heading: #f1f3f6;
    --muted: #9aa1ad;
    --faint: #636b78;
    --border: #2a2e37;
    --border-strong: #3a3f4b;
    --accent: #7b9cff;
    --accent-soft: #7b9cff22;
    --on-accent: #0f1419;
    --link: #85a6ff;
    --code: #f07a9c;
    --code-bg: #23262e;
    --shadow: 0 24px 60px #00000066, 0 4px 12px #00000040;
    --hp-spelling: #f06a70;
    --hp-grammar: #e8b33a;
    --hp-style: #5b9cf5;
  }
}

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

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 2px; }
code, kbd, pre { font-family: var(--mono); font-size: 0.88em; }
code { color: var(--code); background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 4px; }
kbd {
  display: inline-block;
  min-width: 1.6em;
  padding: 0.05em 0.4em;
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--bg-raised);
  color: var(--heading);
  text-align: center;
  font-size: 0.8em;
  line-height: 1.5;
}

h1, h2, h3 { color: var(--heading); line-height: 1.2; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.6rem, 3vw, 2rem); margin: 0 0 1.25rem; }

main, .top, footer { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { main, .top, footer { padding: 0 32px; } }

section { margin: 0 0 96px; }

/* Header */

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 60px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  max-width: none;
  border-bottom: 1px solid var(--border);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--heading);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}
.top nav { display: flex; gap: 20px; font-size: 0.95rem; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a:hover { color: var(--heading); }
@media (max-width: 520px) { .top nav a:not(:last-child) { display: none; } }

/* Hero */

.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
  padding-top: 56px;
  margin-bottom: 40px;
}
@media (min-width: 960px) {
  .hero { grid-template-columns: 5fr 6fr; padding-top: 88px; }
}
.hero-icon { display: block; width: 88px; height: 88px; margin-bottom: 20px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.1rem); margin: 0 0 20px; letter-spacing: -0.02em; }
.lede { font-size: 1.12rem; color: var(--muted); margin: 0 0 28px; max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.button {
  display: inline-block;
  padding: 11px 20px;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  background: var(--bg-raised);
  color: var(--heading);
  font-weight: 600;
  text-decoration: none;
}
.button:hover { border-color: var(--faint); }
.button.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.button.primary:hover { filter: brightness(1.08); }
.meta { margin: 20px 0 0; color: var(--faint); font-size: 0.9rem; }

/* The illustration of the app window */

.window {
  margin: 0;
  min-width: 0;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: var(--bg-raised);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.titlebar {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  padding: 10px 12px 0;
  background: var(--bg-sunk);
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
}
.dots { display: flex; gap: 6px; align-self: center; margin-right: 10px; padding-bottom: 8px; }
.dots i { width: 11px; height: 11px; border-radius: 50%; background: var(--border-strong); }
.tab { padding: 6px 14px; border-radius: 7px 7px 0 0; color: var(--muted); }
.tab.active { background: var(--bg-raised); color: var(--heading); border: 1px solid var(--border); border-bottom: none; margin-bottom: -1px; }
.tab b { color: var(--accent); }
.panes { display: grid; grid-template-columns: 1fr; }
@media (min-width: 620px) { .panes { grid-template-columns: 1fr 1fr; } }

.editor {
  margin: 0;
  padding: 20px;
  color: var(--fg);
  font-size: 0.8rem;
  line-height: 1.75;
  white-space: pre-wrap;
}
.md-h { color: var(--heading); font-weight: 700; }
.md-li { color: var(--faint); }

u.sp, u.gr, u.st {
  text-decoration-line: underline;
  text-decoration-style: wavy;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  text-decoration-skip-ink: none;
}
u.sp { text-decoration-color: var(--hp-spelling); }
u.gr { text-decoration-color: var(--hp-grammar); }
u.st { text-decoration-color: var(--hp-style); text-decoration-style: dotted; text-decoration-thickness: 2px; }

.popover {
  display: grid;
  margin: 2px 0 0 14px;
  gap: 4px;
  width: min(250px, calc(100% - 60px));
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  background: var(--bg-raised);
  box-shadow: var(--shadow);
  font-family: var(--sans);
  font-size: 0.78rem;
  line-height: 1.4;
  white-space: normal;
}
.pop-kind { color: var(--hp-spelling); font-weight: 700; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; }
.pop-msg { color: var(--heading); }
.pop-fix {
  justify-self: start;
  margin: 4px 0;
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}
.pop-act { color: var(--muted); }

.preview {
  padding: 20px 22px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  line-height: 1.6;
}
@media (min-width: 620px) { .preview { border-top: none; border-left: 1px solid var(--border); } }
.preview h3 { margin: 0 0 10px; font-size: 1.3rem; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.preview p { margin: 0 0 10px; }
.task { display: flex; align-items: center; gap: 8px; }
.box {
  display: inline-grid;
  place-items: center;
  width: 15px;
  height: 15px;
  border: 1.5px solid var(--border-strong);
  border-radius: 4px;
  font-size: 10px;
  line-height: 1;
}
.box.on { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }

/* Underline legend */

.legend {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--border);
  overflow: hidden;
}
@media (min-width: 720px) { .legend { grid-template-columns: repeat(3, 1fr); } }
.legend div { display: grid; gap: 2px; padding: 18px 22px; background: var(--bg-raised); }
.legend u { font-weight: 700; color: var(--heading); text-decoration-thickness: 2px; }
.legend span { color: var(--muted); font-size: 0.92rem; }

/* Features */

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 640px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .grid { grid-template-columns: repeat(3, 1fr); } }
.grid article {
  padding: 22px 22px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-raised);
}
.grid h3 { display: flex; align-items: center; gap: 10px; margin: 0 0 10px; font-size: 1.05rem; }
.glyph {
  display: inline-grid;
  place-items: center;
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.95rem;
}
.grid p { margin: 0; color: var(--muted); font-size: 0.94rem; }
.grid strong { color: var(--fg); font-weight: 600; }

/* Privacy */

.privacy > div {
  padding: 32px;
  border-radius: 14px;
  background: var(--bg-sunk);
  border: 1px solid var(--border);
}
.privacy h2 { margin-bottom: 12px; }
.privacy p { margin: 0 0 12px; max-width: 46em; }
.privacy .note { margin: 0; color: var(--muted); font-size: 0.94rem; }

/* Keys */

.keys dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 32px;
  margin: 0;
}
@media (min-width: 640px) { .keys dl { grid-template-columns: repeat(2, 1fr); } }
.keys dl div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.keys dt { white-space: nowrap; }
.keys dd { margin: 0; color: var(--muted); text-align: right; }

/* Install */

.install p { max-width: 46em; }
.code {
  margin: 20px 0;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-sunk);
  overflow-x: auto;
  line-height: 1.7;
}
.code code { background: none; padding: 0; color: var(--fg); font-size: 0.9rem; }
.code .c { color: var(--faint); }

/* Footer */

footer {
  padding-top: 32px;
  padding-bottom: 48px;
  border-top: 1px solid var(--border);
  color: var(--faint);
  font-size: 0.88rem;
}
footer p { margin: 0 0 6px; }
footer a { color: var(--muted); }