/* andreysergeevich.me: no external fonts, no CDNs. */
:root {
  --bg: #f7f8fa; --bg-alt: #eef1f5; --surface: #ffffff; --text: #0f172a; --muted: #5b6474;
  --border: #dde2ea; --accent: #0369a1; --accent-2: #0f766e; --accent-ink: #ffffff;
  --shadow: 0 1px 2px rgba(15,23,42,.06), 0 8px 24px rgba(15,23,42,.06);
  --radius: 14px; --wrap: 1080px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1220; --bg-alt: #0f172a; --surface: #111a2e; --text: #e6ebf3; --muted: #94a0b4;
    --border: #1f2a40; --accent: #38bdf8; --accent-2: #2dd4bf; --accent-ink: #04111d;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b1220; --bg-alt: #0f172a; --surface: #111a2e; --text: #e6ebf3; --muted: #94a0b4;
  --border: #1f2a40; --accent: #38bdf8; --accent-2: #2dd4bf; --accent-ink: #04111d;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .pulse { animation: none !important; } }
body { margin: 0; font-family: var(--font); font-size: 17px; line-height: 1.65; color: var(--text); background: var(--bg); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .6em; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); letter-spacing: -0.025em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 22px; }
.narrow { max-width: 780px; }
.center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }


/* Header */
.site-header { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: saturate(160%) blur(10px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; gap: 18px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 700; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; background: var(--text); color: var(--bg); font-size: .85rem; letter-spacing: .02em; }
.nav { list-style: none; display: flex; gap: 4px; margin: 0 0 0 auto; padding: 0; }
.nav a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--muted); text-decoration: none; font-size: .95rem; }
.nav a:hover { color: var(--text); background: var(--bg-alt); }
.theme-toggle { border: 1px solid var(--border); background: var(--surface); color: var(--text); width: 38px; height: 38px; border-radius: 10px; cursor: pointer; font-size: 1.1rem; }
@media (max-width: 760px) {
  .header-inner { flex-wrap: wrap; height: auto; padding-top: 10px; padding-bottom: 6px; gap: 6px 12px; }
  .theme-toggle { margin-left: auto; }
  .site-header nav { order: 3; width: 100%; overflow-x: auto; }
  .nav { margin: 0; flex-wrap: nowrap; }
  .nav a { white-space: nowrap; padding: 4px 8px; font-size: .9rem; }
}

/* Hero */
.hero { padding: 64px 0 56px; background: radial-gradient(1100px 420px at 85% -10%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%); }
.hero-grid { display: grid; grid-template-columns: 1.35fr .85fr; gap: 48px; align-items: center; }
.eyebrow { font-family: var(--mono); font-size: .85rem; color: var(--accent-2); text-transform: uppercase; letter-spacing: .08em; margin-bottom: .8em; }
.lede { font-size: 1.12rem; color: var(--muted); max-width: 38em; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 22px 0 28px; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--text); text-decoration: none; font-weight: 600; box-shadow: var(--shadow); }
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.hero-photo { margin: 0; }
.hero-photo img { border-radius: 22px; box-shadow: var(--shadow); aspect-ratio: 1; object-fit: cover; border: 1px solid var(--border); }
.hero-photo figcaption { margin-top: 10px; font-size: .85rem; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } .hero-photo { max-width: 220px; order: -1; } .hero { padding-top: 36px; } }

/* Now card */
.now-card { border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius); padding: 14px 18px; max-width: 460px; box-shadow: var(--shadow); }
.now-head { display: flex; align-items: center; gap: 8px; font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); font-family: var(--mono); }
.pulse { width: 9px; height: 9px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-2) 60%, transparent); animation: pulse 2.4s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-2) 55%, transparent); } 70% { box-shadow: 0 0 0 10px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }
.now-place { font-size: 1.2rem; font-weight: 650; margin: 6px 0 2px; }
.now-meta { font-size: .85rem; color: var(--muted); margin: 0; }
.now-next { list-style: none; padding: 0; margin: 8px 0 0; font-size: .9rem; color: var(--muted); }
.now-next li::before { content: "→ "; color: var(--accent-2); }

/* Sections */
.section { padding: 72px 0; }
.section.alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-lede { color: var(--muted); max-width: 44em; }
.sub { margin-top: 40px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin-top: 24px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 20px 8px; box-shadow: var(--shadow); }
.card h3 { margin-bottom: .4em; }
.card p { color: var(--muted); font-size: .97rem; }
.card .stack { font-family: var(--mono); font-size: .8rem; color: var(--accent-2); }

.badges { list-style: none; padding: 0; margin: 12px 0 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.badges li { border: 1px solid var(--border); background: var(--surface); border-radius: 999px; padding: 6px 14px; font-size: .92rem; font-weight: 600; }

/* Timeline */
.timeline { list-style: none; padding: 0; margin: 28px 0 20px; border-left: 2px solid var(--border); }
.timeline > li { position: relative; padding: 0 0 30px 26px; }
.timeline > li::before { content: ""; position: absolute; left: -7px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); border: 2px solid var(--bg); }
.tl-when { font-family: var(--mono); font-size: .82rem; color: var(--muted); margin-bottom: 4px; }
.tl-what h3 { margin-bottom: .15em; }
.tl-what .org { color: var(--accent-2); font-weight: 600; margin-bottom: .5em; }
.tl-what ul { padding-left: 1.1em; margin: 0 0 1em; }
.tl-what li { margin-bottom: .3em; }
.tl-prev { margin-top: 1em; font-size: 1.02rem; }

/* Travel */
.trip { display: grid; grid-template-columns: 180px 1fr; gap: 18px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px 4px; box-shadow: var(--shadow); }
.trip-when { font-family: var(--mono); font-size: .85rem; color: var(--accent-2); }
@media (max-width: 600px) { .trip { grid-template-columns: 1fr; gap: 4px; } }

/* Contact */
.contact-email { font-size: clamp(1.2rem, 3.4vw, 1.7rem); font-weight: 700; word-break: break-word; }
.links { list-style: none; padding: 0; display: flex; gap: 18px; justify-content: center; margin: 10px 0 18px; }

/* Footer */
.site-footer { padding: 28px 0 40px; font-size: .9rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }
.footer-inner p { margin: 0; }
.notfound { padding: 120px 22px; text-align: center; }