/* =========================================
   Usual Expat - site stylesheet
   Brand: navy #001F3F · accent #3A9BFF · paper #F7FAFC
   ========================================= */

:root {
  --brand-navy: #001F3F;
  --brand-blue: #3A9BFF;
  --brand-paper: #F7FAFC;

  /* default accent - overridable via tweaks */
  --accent: #3A9BFF;
  --accent-soft: color-mix(in oklab, var(--accent) 15%, transparent);
  --accent-strong: color-mix(in oklab, var(--accent) 80%, white);

  /* fonts (overridable) */
  --font-sans: "Quicksand", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* radii / shadows */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 18px;
  --r-pill: 999px;

  /* timing */
  --ease: cubic-bezier(.2,.8,.2,1);
}

/* ---- THEME: dark (default) ---- */
:root, [data-theme="dark"] {
  --bg: oklch(0.155 0.015 250);
  --bg-2: oklch(0.195 0.02 250);
  --bg-3: oklch(0.235 0.025 250);
  --line: oklch(0.32 0.02 250);
  --line-soft: oklch(0.26 0.02 250);
  --text: oklch(0.95 0.01 250);
  --text-2: oklch(0.78 0.015 250);
  --text-3: oklch(0.6 0.02 250);
  --shadow: 0 12px 40px -12px rgba(0,0,0,0.5);
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #F7FAFC;
  --bg-2: #FFFFFF;
  --bg-3: #EEF2F6;
  --line: #D9E1EA;
  --line-soft: #E7ECF1;
  --text: #001F3F;
  --text-2: #2A3F5A;
  --text-3: #5A6B7E;
  --shadow: 0 12px 30px -10px rgba(0,31,63,0.18);
  color-scheme: light;
}

/* ---- reset / base ---- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  text-wrap: pretty;
  font-feature-settings: "ss01", "cv11";
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: var(--accent); color: var(--brand-navy); }

/* ---- layout helpers ---- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }
.container-narrow { max-width: 880px; margin: 0 auto; padding: 0 32px; }
.stack > * + * { margin-top: var(--gap, 16px); }
.row { display: flex; align-items: center; gap: 12px; }

/* ---- typography ---- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--accent);
}
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.1;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(40px, 5.5vw, 72px); letter-spacing: -0.02em; }
h2 { font-size: clamp(28px, 3.4vw, 44px); }
h3 { font-size: 22px; line-height: 1.25; }
p  { margin: 0; color: var(--text-2); }

.mono { font-family: var(--font-mono); }
.accent { color: var(--accent); }

/* ---- nav ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand__mark {
  width: 32px;
  height: 32px;
  color: var(--text);
}
.brand__divider {
  width: 1px;
  height: 22px;
  background: var(--line);
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.nav__links {
  display: flex;
  gap: 6px;
  align-items: center;
}
.nav__link {
  padding: 8px 14px;
  border-radius: var(--r-pill);
  font-size: 14px;
  color: var(--text-2);
  transition: color .2s var(--ease), background .2s var(--ease);
}
.nav__link:hover { color: var(--text); background: var(--bg-2); }
.nav__link[aria-current="page"] {
  color: var(--text);
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
}
.nav__cta {
  background: var(--accent);
  color: var(--brand-navy);
  font-weight: 600;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  font-size: 14px;
  transition: transform .15s var(--ease), filter .2s var(--ease);
}
.nav__cta:hover { filter: brightness(1.08); transform: translateY(-1px); }

.theme-toggle {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--line-soft);
  display: grid;
  place-items: center;
  color: var(--text-2);
  transition: background .2s var(--ease), color .2s var(--ease);
}
.theme-toggle:hover { background: var(--bg-2); color: var(--text); }

/* ---- mobile nav (hamburger + slide-down panel) ---- */
.nav__burger {
  display: none;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--line-soft);
  place-items: center;
  color: var(--text-2);
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.nav__burger:hover, .nav__burger[aria-expanded="true"] {
  background: var(--bg-2);
  color: var(--accent);
  border-color: var(--accent-soft);
}
.nav__mobile {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  flex-direction: column;
  gap: 8px;
  padding: 16px 32px 24px;
  background: color-mix(in oklab, var(--bg) 96%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.nav__mobile.is-open { display: flex; }
.nav__mobile a {
  padding: 12px 16px;
  border-radius: var(--r-md);
  font-size: 16px;
  color: var(--text-2);
  transition: color .2s var(--ease), background .2s var(--ease);
}
.nav__mobile a:hover,
.nav__mobile a[aria-current="page"] {
  color: var(--text);
  background: var(--bg-2);
}
.nav__mobile .nav__cta {
  display: block;
  margin-top: 8px;
  text-align: center;
  background: var(--accent);
  color: var(--brand-navy);
  font-weight: 600;
  border-radius: var(--r-pill);
  padding: 14px 16px;
}
.nav__mobile .nav__cta:hover { background: var(--accent); color: var(--brand-navy); filter: brightness(1.08); }
body.nav-open { overflow: hidden; }

/* ---- buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: var(--r-pill);
  font-weight: 600;
  font-size: 15px;
  transition: transform .15s var(--ease), filter .2s var(--ease), background .2s var(--ease), color .2s var(--ease);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary { background: var(--accent); color: var(--brand-navy); }
.btn--primary:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn--ghost:hover { background: var(--bg-2); border-color: var(--accent); color: var(--accent); }
.btn .arrow { transition: transform .2s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* ---- footer ---- */
.footer {
  border-top: 1px solid var(--line-soft);
  padding: 56px 0 36px;
  margin-top: 96px;
  background: var(--bg);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.footer h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 500;
  margin-bottom: 14px;
}
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer a { color: var(--text-2); font-size: 14px; }
.footer a:hover { color: var(--accent); }
.footer__bottom {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-3);
  font-family: var(--font-mono);
}
@media (max-width: 800px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; gap: 12px; align-items: flex-start; }
}

/* ---- common section header ---- */
.section { padding: 96px 0; }
.section--tight { padding: 64px 0; }
.section__head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 32px;
  margin-bottom: 48px;
}

/* ---- card primitive ---- */
.card {
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  padding: 28px;
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}
.card:hover { border-color: var(--accent); }

/* ---- chip / tag ---- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  color: var(--text-2);
}
.chip--accent { color: var(--accent); border-color: var(--accent-soft); background: var(--accent-soft); }

/* ---- terminal block (used in blog) ---- */
.term {
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  font-family: var(--font-mono);
  font-size: 13px;
  overflow: hidden;
}
.term__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
  background: var(--bg-3);
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: 0.06em;
}
.term__dot { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.term__dot--r { background: #ff5f56; }
.term__dot--y { background: #ffbd2e; }
.term__dot--g { background: #27c93f; }
.term__body { padding: 16px 18px; line-height: 1.7; }
.term__prompt { color: var(--accent); }
.term__path { color: var(--text-3); }

/* ---- prose (markdown content) ---- */
.prose { color: var(--text-2); font-size: 16px; line-height: 1.75; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { font-size: 28px; margin-top: 2.2em; color: var(--text); }
.prose h3 { font-size: 20px; margin-top: 1.8em; color: var(--text); }
.prose a { color: var(--accent); border-bottom: 1px solid var(--accent-soft); }
.prose a:hover { border-color: var(--accent); }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--accent);
}
.prose pre {
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
}
.prose pre code {
  background: none; border: 0; padding: 0; color: var(--text);
  font-size: 13px;
}
.prose blockquote {
  margin: 0;
  padding-left: 18px;
  border-left: 2px solid var(--accent);
  color: var(--text);
  font-style: normal;
}
.prose ul, .prose ol { padding-left: 22px; }
.prose li + li { margin-top: 6px; }
.prose img { border-radius: var(--r-md); border: 1px solid var(--line-soft); }
.prose hr { border: 0; border-top: 1px solid var(--line-soft); margin: 2.5em 0; }

/* simple syntax token colors (override via JS) */
.tok-k { color: #c084fc; }   /* keyword */
.tok-s { color: #86efac; }   /* string */
.tok-n { color: var(--accent); } /* number / identifier */
.tok-c { color: var(--text-3); font-style: italic; } /* comment */
.tok-t { color: #fbbf24; }   /* type */

[data-theme="light"] .tok-k { color: #7c3aed; }
[data-theme="light"] .tok-s { color: #047857; }
[data-theme="light"] .tok-t { color: #b45309; }

/* ---- utilities ---- */
.hidden { display: none !important; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 880px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .nav__links a:not(.nav__cta) { display: none; }
  .nav__links .nav__cta { display: none; }
  .nav__burger { display: grid; }
  .section { padding: 64px 0; }
  .section__head { flex-direction: column; align-items: flex-start; }
  .eyebrow::before { margin-left: -32px; width: 50px; }
}

/* ---- subtle background grid (pages can opt-in) ---- */
.bg-grid {
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  background-position: -1px -1px;
  mask-image: radial-gradient(ellipse at top, black 30%, transparent 80%);
}

/* ---- accent corner glow ---- */
.glow {
  position: absolute;
  inset: auto;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-soft) 0%, transparent 60%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   Print: hide chrome, force light, tighten type
   Applies on every page; resume.css adds resume-specific rules.
   ============================================================ */
@media print {
  /* Force print-safe colours regardless of dark/light toggle. */
  :root, [data-theme="dark"], [data-theme="light"] {
    --bg: #ffffff;
    --bg-2: #ffffff;
    --bg-3: #ffffff;
    --line: #cccccc;
    --line-soft: #e5e5e5;
    --text: #000000;
    --text-2: #1a1a1a;
    --text-3: #555555;
    --accent: #0b3a8c;
    color-scheme: light;
  }

  html, body { background: #fff !important; color: #000 !important; }
  body { font-size: 10.5pt; line-height: 1.45; }

  /* Hide global chrome */
  .nav, .footer, .theme-toggle, .btn { display: none !important; }

  /* Drop decorative eyebrow markers */
  .eyebrow { display: none !important; }

  /* Page margins */
  @page { margin: 16mm; }

  /* Don't break headings off from their content */
  h1, h2, h3, h4 { page-break-after: avoid; break-after: avoid-page; }

  /* No blurs / shadows on paper */
  * { box-shadow: none !important; filter: none !important; backdrop-filter: none !important; }
}