/* Shared styles for abuqodirov.github.io: welcome page and article pages. */

:root {
  color-scheme: light;
  --bg: #f6f5f1;
  --surface: #ffffff;
  --text: #15171c;
  --muted: #5d6472;
  --line: #e3e1d9;
  --accent: #c8580d;
  --accent-soft: rgba(200, 88, 13, 0.1);
  --on-accent: #ffffff;
  --grid: rgba(21, 23, 28, 0.07);
  --shadow: 0 1px 2px rgba(16, 18, 24, 0.06), 0 10px 28px rgba(16, 18, 24, 0.07);
  --radius: 16px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0a0c10;
    --surface: #11141b;
    --text: #e9ecf2;
    --muted: #9aa3b3;
    --line: #232835;
    --accent: #f28a3d;
    --accent-soft: rgba(242, 138, 61, 0.13);
    --on-accent: #1a0d03;
    --grid: rgba(255, 255, 255, 0.05);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--font);
  overflow-x: clip;
}

/* A faint dot grid, like a die under a microscope. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: radial-gradient(var(--grid) 1px, transparent 1px);
  background-size: 22px 22px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0, transparent 75%);
  mask-image: linear-gradient(to bottom, #000 0, transparent 75%);
}

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

.wrap { width: min(1080px, 100% - 32px); margin-inline: auto; }

/* Navigation */
.nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 0; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 600; }
.brand:hover { text-decoration: none; }
.mark {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center;
  font: 600 13px/1 var(--mono); color: #fff;
  background: linear-gradient(135deg, #d4621a, #e9a23b);
  box-shadow: var(--shadow);
}
.nav-links { display: flex; gap: 18px; font-size: 15px; }
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* Welcome page */
.hero { padding: 72px 0 24px; }
.eyebrow { font: 500 clamp(11.5px, 0.6vw + 9px, 13px)/1.5 var(--mono); letter-spacing: 0.02em; color: var(--accent); margin: 0; text-wrap: balance; }
h1 { font-size: clamp(40px, 7vw, 72px); line-height: 1.02; letter-spacing: -0.035em; margin: 14px 0 18px; font-weight: 700; }
.lead { font-size: clamp(18px, 2.2vw, 21px); color: var(--muted); max-width: 660px; margin: 0; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 999px;
  font-weight: 600; font-size: 15px; line-height: 1.2;
  border: 1px solid var(--line); color: var(--text); background: var(--surface);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn svg { width: 18px; height: 18px; flex: none; }

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; margin-top: 48px;
}
.stat { background: var(--surface); padding: 18px 20px; }
.stat b { display: block; font: 600 22px/1.25 var(--mono); letter-spacing: -0.02em; }
.stat span { color: var(--muted); font-size: 14px; }

section { padding: 48px 0; }
.section-title { font: 500 13px/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 0 0 18px; }

.card {
  display: grid; grid-template-columns: 1.15fr 1fr;
  background: var(--surface); border: 1px solid var(--line); border-radius: 20px;
  overflow: hidden; box-shadow: var(--shadow);
}
.card-media { background: #090b0f; display: grid; place-items: center; min-height: 100%; }
.card-media img { width: 100%; height: auto; display: block; aspect-ratio: 16 / 9; object-fit: cover; }
.card-body { padding: 28px; display: flex; flex-direction: column; gap: 14px; }
.card-body h2 { margin: 0; font-size: 26px; line-height: 1.2; letter-spacing: -0.02em; }
.card-body p { margin: 0; color: var(--muted); }
.card-body .actions { margin-top: auto; padding-top: 6px; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font: 500 12px/1 var(--mono); padding: 6px 9px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }

.timeline {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.timeline li { background: var(--surface); padding: 18px 20px; display: grid; grid-template-columns: 150px 1fr; gap: 16px; }
.timeline time { font: 500 13px/1.7 var(--mono); color: var(--muted); }
.timeline strong { display: block; }
.timeline span { color: var(--muted); font-size: 15px; }

footer {
  border-top: 1px solid var(--line); padding: 28px 0 48px; margin-top: 24px;
  color: var(--muted); font-size: 14px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
}
.links { display: flex; gap: 16px; }
.links a { color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }
.links a:hover { color: var(--text); text-decoration: none; }
.links svg { width: 16px; height: 16px; }

/* Article pages */
.article { width: min(720px, 100% - 32px); margin: 0 auto; padding: 32px 0 40px; }
.article h1 { font-size: clamp(32px, 5.2vw, 50px); line-height: 1.08; margin: 12px 0 14px; }
.byline { color: var(--muted); font-size: 15px; margin: 0 0 8px; }
.article h2 { font-size: 26px; line-height: 1.25; letter-spacing: -0.02em; margin: 52px 0 14px; }
.article p { margin: 0 0 18px; font-size: 17.5px; }
.article p.eyebrow { font-size: clamp(11.5px, 0.6vw + 9px, 13px); margin: 0; }
.article p.byline { font-size: 15px; margin: 0 0 8px; }
.article figure { margin: 34px 0; }
.article figure a { display: block; cursor: zoom-in; }

/* Full-size diagram overlay */
.lightbox {
  position: fixed; inset: 0; z-index: 50;
  display: grid; place-items: center;
  padding: 64px 16px 16px;
  background: rgba(5, 6, 9, 0.9);
  cursor: zoom-out;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: min(1600px, 100%); max-height: 100%; width: auto; height: auto; border-radius: 10px; background: #ffffff; }
.lightbox-close {
  position: fixed; top: 14px; right: 14px;
  width: 42px; height: 42px; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.3); background: rgba(255, 255, 255, 0.12);
  color: #ffffff; font-size: 26px; line-height: 1; cursor: pointer;
}
.lightbox-close:hover { background: rgba(255, 255, 255, 0.22); }
.article figure img { width: 100%; height: auto; display: block; border-radius: 12px; border: 1px solid var(--line); background: #ffffff; }
.article figure.dark img { background: #090b0f; }
.article figcaption { color: var(--muted); font-size: 14.5px; line-height: 1.55; margin: 12px auto 0; max-width: 720px; }
.article .refs p { font-size: 15px; color: var(--muted); }
.lang { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; font: 500 13px/1 var(--mono); }
.lang a, .lang span { padding: 8px 12px; color: var(--muted); }
.lang span { background: var(--accent-soft); color: var(--accent); }
.lang a:hover { color: var(--text); text-decoration: none; }

@media (max-width: 760px) {
  .hero { padding-top: 40px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .card { grid-template-columns: 1fr; }
  .card-body { padding: 22px; }
  .timeline li { grid-template-columns: 1fr; gap: 4px; }
  .nav-links { gap: 14px; }
  .article p { font-size: 17px; }
}