/*
  Shared styling for covertrackpad.com.

  Colours come from ../brand-kit.md and are not invented here. The accent SWAPS
  by theme rather than being one colour dimmed: #3DDCFF is the app's own cyan and
  is bright enough to carry dark text on a dark page, but it cannot carry white
  text at all (1.63:1), so light mode uses the deepened teal instead. That is the
  one rule in the brand kit that must not be broken.
*/

:root {
  --cyan: #3DDCFF;
  --cyan-hover: #17B6D6;
  --teal: #0E6E7E;
  --teal-hover: #08525E;
  --coral: #FF6F5E;

  --surface: #FFFFFF;
  --raised: #F4F6F8;
  --ink: #171A1E;
  --muted: #5A626B;
  --line: #E2E6EA;
  --accent: var(--teal);
  --accent-hover: var(--teal-hover);
  --on-accent: #FFFFFF;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface: #0D1117;
    --raised: #14181E;
    --ink: #E6EAF0;
    --muted: #99A2AD;
    --line: #232932;
    --accent: var(--cyan);
    --accent-hover: var(--cyan-hover);
    --on-accent: #08131A;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 720px; margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 680px; padding-top: 56px; padding-bottom: 72px; }

a { color: var(--accent); }

/* ---- header ---- */

header { padding: 72px 0 48px; text-align: center; }
.icon { width: 88px; height: 88px; border-radius: 20px; display: block; margin: 0 auto 24px; }
h1 { font-size: clamp(30px, 6vw, 42px); line-height: 1.15; margin: 0 0 12px; letter-spacing: -0.02em; }
.tagline { color: var(--muted); font-size: 15px; font-style: italic; margin: 0 0 28px; }
.lede { font-size: clamp(18px, 2.6vw, 21px); margin: 0 auto; max-width: 34em; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 32px; }

/* ---- buttons ---- */

.cta { margin: 36px 0 0; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--on-accent);
  padding: 13px 26px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
}
.btn:hover { background: var(--accent-hover); }
/* Light mode darkens the teal, so the label has to go white to stay legible. */
@media (prefers-color-scheme: light) { .btn:hover { color: #FFFFFF; } }
.cta small { display: block; color: var(--muted); font-size: 14px; margin-top: 12px; }

/* ---- sections ---- */

section { padding: 40px 0; border-top: 1px solid var(--line); }
h2 { font-size: 22px; margin: 0 0 18px; letter-spacing: -0.01em; }
h3 { font-size: 16px; margin: 26px 0 6px; }
p { margin: 0 0 16px; }
ul { margin: 0 0 16px; padding-left: 22px; }
li { margin-bottom: 8px; }

.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li { counter-increment: step; position: relative; padding-left: 44px; margin-bottom: 22px; }
.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 1px;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: var(--on-accent);
  display: grid; place-items: center;
  font-size: 14px; font-weight: 700;
}

/* ---- cards ---- */

.tiers { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 620px) { .tiers { grid-template-columns: 1fr 1fr; } }
.tier { background: var(--raised); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.tier h3 {
  margin-top: 0; font-size: 15px; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--muted);
}
.tier ul { margin-bottom: 0; }

.note {
  background: var(--raised);
  border-left: 3px solid var(--accent);
  padding: 14px 18px;
  border-radius: 0 8px 8px 0;
  margin: 0 0 16px;
}
.note :last-child { margin-bottom: 0; }
.note.lede { font-size: 18px; padding: 16px 20px; margin-bottom: 24px; }

/* ---- FAQ ---- */

details {
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}
details summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; color: var(--muted); font-weight: 400; }
details[open] summary::after { content: "\2013"; }
details > *:not(summary) { margin-top: 12px; }
details p:last-child { margin-bottom: 0; }

/* ---- misc ---- */

code { background: var(--raised); padding: 2px 6px; border-radius: 5px; font-size: 0.9em; }

footer {
  padding: 40px 0 64px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}
footer a { color: var(--muted); }
.fineprint { font-size: 13px; }