:root {
  --bg: #fafaf9;
  --surface: #ffffff;
  --text: #1c1917;
  --muted: #57534e;
  --border: #e7e5e4;
  --accent: #0d9488;
  --accent-contrast: #ffffff;
  --radius: 12px;
  --max: 880px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c0a09;
    --surface: #1c1917;
    --text: #f5f5f4;
    --muted: #a8a29e;
    --border: #292524;
    --accent: #2dd4bf;
    --accent-contrast: #042f2e;
  }
}

:root[data-theme="dark"] {
  --bg: #0c0a09;
  --surface: #1c1917;
  --text: #f5f5f4;
  --muted: #a8a29e;
  --border: #292524;
  --accent: #2dd4bf;
  --accent-contrast: #042f2e;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 16px;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo {
  font-family: "JetBrains Mono", monospace;
  font-weight: 500;
  font-size: 1.25rem;
  color: var(--text);
}
.logo span { color: var(--accent); }
.logo:hover { text-decoration: none; }
nav { display: flex; align-items: center; gap: 20px; }
nav .toggle + .toggle { margin-left: -12px; }
nav a { color: var(--muted); font-size: 0.95rem; }
nav a:hover { color: var(--text); text-decoration: none; }
.toggle {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}
.lang-toggle {
  width: auto;
  padding: 0 10px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Hero */
.hero { padding: 120px 16px 80px; }
.eyebrow {
  font-family: "JetBrains Mono", monospace;
  color: var(--accent);
  margin: 0 0 8px;
}
h1 {
  font-size: clamp(2.5rem, 7vw, 4.25rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
}
.tagline {
  font-size: clamp(1.25rem, 3vw, 1.6rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  color: var(--accent);
}
.lead {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 0 32px;
}
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 500;
  background: var(--surface);
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-contrast);
}

/* Sections */
.section { padding: 56px 16px; border-top: 1px solid var(--border); }
h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin: 0 0 24px;
}
h3 { font-size: 1.1rem; margin: 0 0 6px; }

.about-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 32px;
  align-items: start;
}
.about-grid p { margin: 0; font-size: 1.05rem; }
.skills {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.skills li {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
}

.timeline { list-style: none; padding: 0; margin: 0; display: grid; gap: 28px; }
.timeline li { display: grid; grid-template-columns: 100px 1fr; gap: 16px; }
.timeline p { margin: 0; color: var(--muted); }
.when {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  color: var(--muted);
  padding-top: 3px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card p { margin: 0 0 12px; color: var(--muted); }
.card .tags {
  margin: 0;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
}

.links { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; font-size: 1.05rem; }

.footer {
  padding: 32px 16px 48px;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}

/* 404 */
.not-found { min-height: 70vh; display: grid; place-content: center; text-align: center; }

@media (max-width: 640px) {
  nav a { display: none; }
  .hero { padding: 72px 16px 56px; }
  .about-grid { grid-template-columns: 1fr; }
  .timeline li { grid-template-columns: 1fr; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card { transition: none; }
}

/* Language: both versions are in the HTML, <html lang> picks one */
html[lang="cs"] [data-lang="en"],
html:not([lang="cs"]) [data-lang="cs"] { display: none; }

/* Project cards are links */
a.card { display: block; color: inherit; }
a.card:hover { text-decoration: none; }
a.card h3 { color: var(--text); }
a.card .tags { color: var(--accent); }

/* Project subpages */
.project { padding-top: 32px; }
.back { display: inline-block; color: var(--muted); font-size: 0.95rem; margin-bottom: 40px; }
.back:hover { color: var(--text); text-decoration: none; }
.project-head { padding-bottom: 48px; }
.project-head .skills { margin-bottom: 28px; }
.project .section { padding-left: 0; padding-right: 0; }
.prose { font-size: 1.1rem; max-width: 680px; margin: 0; }
.features { margin: 0; padding-left: 1.2em; display: grid; gap: 10px; max-width: 680px; }
.features li::marker { color: var(--accent); }
.gallery { display: grid; gap: 24px; }
.gallery figure { margin: 0; }
.gallery img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.gallery figcaption { margin-top: 8px; color: var(--muted); font-size: 0.9rem; }

/* Direct macOS downloads */
.card .card-download { margin: 16px 0 0; color: var(--accent); font-size: 0.9rem; }
.release-meta, .download-help { color: var(--muted); }
.download-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.download-row h3 { font-size: 1rem; }
.download-row p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.download-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; }
.download-actions > a { font-size: 0.9rem; }
.download-notice { max-width: 680px; font-size: 0.95rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
@media (max-width: 760px) {
  .download-row { align-items: flex-start; flex-direction: column; gap: 12px; }
}