/* ---------- Tokens ---------- */
:root {
  --bg: #ffffff;
  --bg-alt: #f4f6f9;
  --ink: #141a24;
  --ink-soft: #4a5568;
  --line: #dde2ea;
  --accent: #1f4fd8;
  --accent-dark: #173ba6;
  --accent-tint: #e8eefc;
  --radius: 10px;
  --max: 1040px;
  --header-h: 64px;
  --font: "Figtree", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.2; margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-dark); }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.container { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  z-index: 100;
}
.skip-link:focus { top: 1rem; color: #fff; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.site-header.scrolled { border-bottom-color: var(--line); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.brand {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--ink);
  text-decoration: none;
}
.brand:hover { color: var(--ink); }

.site-nav { display: flex; align-items: center; gap: 0.25rem; }
.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.975rem;
  padding: 0.5rem 0.8rem;
  border-radius: 6px;
}
.site-nav a:hover { color: var(--ink); background: var(--bg-alt); }
.site-nav a.active { color: var(--accent); background: var(--accent-tint); }
.site-nav .nav-cta {
  margin-left: 0.5rem;
  background: var(--accent);
  color: #fff;
}
.site-nav .nav-cta:hover,
.site-nav .nav-cta.active { background: var(--accent-dark); color: #fff; }

.menu-toggle {
  display: none;
  font: inherit;
  font-weight: 600;
  color: var(--ink);
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero { padding: 3rem 0 3rem; }
.hero-inner { max-width: 1040px; margin-inline: auto; display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
.hero-inner.container { margin-inline: auto; }

.hero-image img { width: 100%; max-width: 900px; max-height: 480px; object-fit: contain; display: block; margin-inline: auto; }

.hero-location { color: var(--ink-soft); font-weight: 500; margin-bottom: 0.75rem; }
.hero h1 { font-size: clamp(2.5rem, 6vw, 3.75rem); font-weight: 700; }
.hero-role { font-size: clamp(1.25rem, 2.5vw, 1.6rem); font-weight: 600; color: var(--accent); margin-top: 0.5rem; }
.hero-summary { margin-top: 1.5rem; font-size: 1.15rem; color: var(--ink-soft); max-width: 60ch; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1rem; margin-top: 2rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  padding: 0.75rem 1.4rem;
  border-radius: 8px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-secondary { border-color: var(--ink); color: var(--ink); }
.btn-secondary:hover { background: var(--ink); color: #fff; }
.btn-link { padding-inline: 0.4rem; }

/* ---------- Sections ---------- */
.section { padding: 4.5rem 0; }
.section-alt { background: var(--bg-alt); }
.section h2 { font-size: clamp(1.75rem, 3.5vw, 2.25rem); font-weight: 700; }
.section-intro { color: var(--ink-soft); margin-top: 0.6rem; max-width: 60ch; }

/* ---------- Projects ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 2rem 0 1.75rem; }
.filter {
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink-soft);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 1.1rem;
  cursor: pointer;
}
.filter:hover { border-color: var(--ink); color: var(--ink); }
.filter[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: #fff; }

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.project {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.project[hidden] { display: none; }
.project-tag { font-size: 0.85rem; font-weight: 600; color: var(--ink-soft); }
.project[data-category="work"] .project-tag { color: var(--accent); }
.project h3 { font-size: 1.2rem; }
.project > p:not(.project-tag) { font-size: 0.98rem; color: var(--ink-soft); }

.tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.25rem; }
.tech li {
  font-size: 0.82rem;
  font-weight: 500;
  background: var(--bg-alt);
  border-radius: 6px;
  padding: 0.2rem 0.6rem;
}

.project-links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; margin-top: auto; padding-top: 0.5rem; font-weight: 600; font-size: 0.95rem; }

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem 2.5rem;
  margin-top: 2.25rem;
}
.skill-group h3 { font-size: 1.05rem; margin-bottom: 0.75rem; }
.skill-group li { padding: 0.3rem 0; color: var(--ink-soft); border-bottom: 1px solid var(--line); }
.skill-group li:last-child { border-bottom: 0; }

/* ---------- Experience / Education ---------- */
.timeline { margin-top: 2.25rem; display: grid; gap: 2.5rem; }
.timeline-item { padding-left: 1.5rem; border-left: 3px solid var(--accent-tint); }
.timeline-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 0.25rem 1rem; }
.timeline-head h3, .education h3 { font-size: 1.25rem; }
.timeline-date { color: var(--ink-soft); font-size: 0.95rem; }
.timeline-org { font-weight: 600; margin-top: 0.15rem; }
.bullets { margin-top: 1rem; display: grid; gap: 0.5rem; max-width: 70ch; }
.bullets li { position: relative; padding-left: 1.1rem; color: var(--ink-soft); }
.bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.education { margin-top: 1.5rem; }
.education .timeline-date { margin-top: 0.25rem; }

/* ---------- Contact ---------- */
.contact-list { display: grid; gap: 1.1rem; margin: 2rem 0 2.25rem; }
.contact-list div { display: grid; grid-template-columns: 7rem 1fr; gap: 0.5rem; align-items: baseline; }
.contact-list dt { color: var(--ink-soft); font-weight: 500; }
.contact-list dd { margin: 0; font-weight: 600; overflow-wrap: anywhere; }
.sep { margin: 0 0.4rem; color: var(--ink-soft); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 1.75rem 0; font-size: 0.95rem; color: var(--ink-soft); }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; }

/* ---------- Mobile ---------- */
@media (max-width: 760px) {
  .menu-toggle { display: inline-block; }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 1.25rem 1rem;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 0.8rem 0.5rem; }
  .site-nav .nav-cta { margin: 0.5rem 0 0; text-align: center; }

  .hero { padding: 3rem 0 3rem; }
  .hero-inner { grid-template-columns: 1fr; gap: 2rem; text-align: center; }
  .hero-image img { margin-inline: auto; }
  .section { padding: 3.25rem 0; }
  .contact-list div { grid-template-columns: 1fr; gap: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}