/* Rust + Tauri Sprint shared stylesheet */
:root {
  --bg: #f7f4ef;
  --paper: #fffdf8;
  --ink: #1f2933;
  --muted: #64707d;
  --line: #ded7ca;
  --accent: #8a3b12;
  --accent-2: #4b6b3c;
  --soft: #f4eee6;
  --good: #186a3b;
  --bad: #9f2f2f;
  --code: #19212a;
  --radius: 18px;
  font-family: Charter, Georgia, 'Times New Roman', serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: radial-gradient(circle at top left, #fff4e6, var(--bg) 42rem);
  color: var(--ink);
  line-height: 1.62;
  font-size: 18px;
}
a { color: var(--accent); text-underline-offset: 3px; }
main, header, footer { width: min(880px, calc(100% - 32px)); margin: 0 auto; }
header { padding: 48px 0 22px; border-bottom: 1px solid var(--line); }
.kicker { margin: 0 0 10px; color: var(--accent-2); font: 700 13px/1.2 ui-sans-serif, system-ui; letter-spacing: .12em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(2.2rem, 7vw, 4.6rem); line-height: .95; letter-spacing: -0.055em; }
.subtitle { max-width: 62ch; color: var(--muted); font-size: 1.1rem; }
nav { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 10px; }
nav a, .pill { display: inline-block; border: 1px solid var(--line); border-radius: 999px; padding: 6px 11px; background: rgba(255,255,255,.45); color: var(--muted); font: 600 14px/1 ui-sans-serif, system-ui; text-decoration: none; }
section { padding: 28px 0; border-bottom: 1px solid var(--line); }
h2 { margin: 0 0 14px; font-size: 1.8rem; line-height: 1.1; letter-spacing: -0.03em; }
h3 { margin: 24px 0 8px; font-size: 1.1rem; font-family: ui-sans-serif, system-ui; }
p { margin: 0 0 1rem; }
ul, ol { padding-left: 1.3rem; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: 0 18px 45px rgba(68, 54, 32, .06); }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.callout { border-left: 4px solid var(--accent); background: var(--soft); padding: 14px 16px; border-radius: 0 12px 12px 0; }
.compare { width: 100%; border-collapse: collapse; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.compare th, .compare td { padding: 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.compare th { text-align: left; font: 700 14px/1.2 ui-sans-serif, system-ui; color: var(--muted); background: #faf7f0; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: #efe8dc; padding: .1em .35em; border-radius: 5px; }
pre { overflow-x: auto; background: var(--code, #182230); color: #edf3f4; padding: 16px; border-radius: 14px; font-size: 15px; line-height: 1.55; }
pre code { background: transparent; color: inherit; padding: 0; border-radius: 0; }
.quiz { display: grid; gap: 12px; margin-top: 14px; }
.quiz button { text-align: left; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); padding: 12px 14px; color: var(--ink); font: 600 15px/1.35 ui-sans-serif, system-ui; cursor: pointer; }
.quiz button:hover { border-color: var(--accent); }
.quiz button.correct { border-color: var(--good); background: #edf8f0; }
.quiz button.wrong { border-color: var(--bad); background: #fff0f0; }
.feedback { min-height: 1.5em; font: 700 15px/1.4 ui-sans-serif, system-ui; }
footer { color: var(--muted); padding: 28px 0 44px; font-size: 15px; }
@media print { body { background: white; } nav, .quiz, footer { display: none; } main, header { width: 100%; } .card { box-shadow: none; } }
@media (max-width: 720px) { body { font-size: 16px; } .grid { grid-template-columns: 1fr; } }