/* =========================================================
   Design tokens
   ========================================================= */
:root {
  --bg: #FAFAF7;
  --bg-grid: #E7E7E1;
  --panel: #FFFFFF;
  --ink: #14171A;
  --ink-soft: #5C6066;
  --ink-faint: #8A8E93;
  --accent: #2F5CFF;
  --accent-soft: #EAF0FF;
  --accent-ink: #16337A;
  --line: #DCDCD5;
  --line-strong: #C7C7BF;
  --status: #1D9A5C;

  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --grid-size: 28px;
  --radius: 3px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

a { color: inherit; }

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 28px;
}

/* =========================================================
   Header / nav
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(250, 250, 247, 0.88);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

.brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
}

.brand .dot { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
  color: var(--ink-soft);
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
  border-color: var(--accent);
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--status);
  background: #F0FAF4;
  border: 1px solid #CFEBDB;
  padding: 5px 10px;
  border-radius: 999px;
  margin-bottom: 22px;
}

.status-badge .pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--status);
  box-shadow: 0 0 0 0 rgba(29, 154, 92, 0.5);
  animation: pulse 2.2s infinite;
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(29, 154, 92, 0.45); }
  70%  { box-shadow: 0 0 0 7px rgba(29, 154, 92, 0); }
  100% { box-shadow: 0 0 0 0 rgba(29, 154, 92, 0); }
}

h1.hero-name {
  font-family: var(--font-mono);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 10px;
  line-height: 1.05;
}

.hero-role {
  font-size: 19px;
  color: var(--ink-soft);
  margin: 0 0 26px;
  max-width: 56ch;
}

.hero-role strong { color: var(--ink); font-weight: 600; }

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.1s ease;
}

.btn:hover { border-color: var(--accent); background: var(--accent-soft); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.btn-primary:hover { background: var(--accent); border-color: var(--accent); }

/* =========================================================
   Section scaffolding
   ========================================================= */
section.block {
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}

section.block:last-of-type { border-bottom: none; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 10px;
}

h2.section-title {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 30px;
}

/* =========================================================
   About
   ========================================================= */
.about-text {
  max-width: 62ch;
  color: var(--ink-soft);
  font-size: 16px;
}

.about-text p { margin: 0 0 14px; }
.about-text strong { color: var(--ink); }

/* =========================================================
   Changelog / project entries
   ========================================================= */
.changelog {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.entry {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: border-left-color 0.15s ease, box-shadow 0.15s ease;
}

.entry:hover {
  border-left-color: var(--accent);
  box-shadow: 0 2px 14px rgba(20, 23, 26, 0.05);
}

.entry-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.entry-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-ink);
  background: var(--accent-soft);
  padding: 3px 8px;
  border-radius: 999px;
}

.entry-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}

.entry-title {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 8px;
}

.entry-desc {
  color: var(--ink-soft);
  font-size: 15px;
  margin: 0 0 14px;
  max-width: 65ch;
}

.entry-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.chip {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-soft);
  border: 1px solid var(--line-strong);
  padding: 3px 9px;
  border-radius: 999px;
}

.entry-links {
  display: flex;
  gap: 16px;
}

.entry-links a {
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
  color: var(--accent);
  border-bottom: 1px solid transparent;
}

.entry-links a:hover { border-color: var(--accent); }

/* =========================================================
   Skills grid (resume page)
   ========================================================= */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 40px;
}

.skill-cat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  background: var(--panel);
}

.skill-cat h3 {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin: 0 0 10px;
}

.skill-cat ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.9;
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.tl-entry {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 20px;
}

.tl-date {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  padding-top: 3px;
}

.tl-role { font-weight: 600; font-size: 16px; margin: 0 0 4px; }
.tl-org { color: var(--ink-soft); font-size: 14px; margin: 0 0 8px; }
.tl-desc { color: var(--ink-soft); font-size: 14.5px; margin: 0; max-width: 58ch; }

@media (max-width: 560px) {
  .tl-entry { grid-template-columns: 1fr; gap: 4px; }
}

/* =========================================================
   Contact
   ========================================================= */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
}

.contact-card {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  color: var(--ink);
  background: var(--panel);
  transition: border-color 0.15s ease, transform 0.1s ease;
}

.contact-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.contact-card .label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
  display: block;
}

.contact-card .value { font-size: 15px; font-weight: 600; }

/* =========================================================
   Footer
   ========================================================= */
footer.site-footer {
  padding: 32px 0 60px;
}

footer.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-note {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}

/* focus states for accessibility */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}