:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #14171a;
  --muted: #5f6975;
  --line: #dfe4ea;
  --accent: #1f6feb;
  --accent-dark: #164ea6;
  --shadow: 0 18px 45px rgba(20, 23, 26, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 64px);
  background: rgba(246, 247, 249, 0.9);
  border-bottom: 1px solid rgba(223, 228, 234, 0.8);
  backdrop-filter: blur(14px);
}

.brand {
  font-size: 1rem;
  font-weight: 750;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav a:hover,
.contact-link:hover {
  color: var(--accent);
}

main {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(240px, 340px) minmax(0, 1fr);
  align-items: center;
  gap: clamp(32px, 7vw, 84px);
  min-height: calc(100vh - 74px);
  padding: 56px 0 64px;
}

.hero-photo {
  overflow: hidden;
  aspect-ratio: 4 / 5;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.hero-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(2.9rem, 7vw, 5.7rem);
  line-height: 0.95;
}

h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.45rem);
  line-height: 1.12;
}

h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.headline {
  max-width: 760px;
  margin: 26px 0 0;
  color: var(--text);
  font-size: clamp(1.2rem, 2.1vw, 1.65rem);
  line-height: 1.35;
}

.summary {
  max-width: 690px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.94rem;
  font-weight: 750;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

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

.button.secondary {
  background: var(--surface);
}

.button.secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.section {
  padding: 76px 0;
  border-top: 1px solid var(--line);
}

.section-heading,
.split {
  display: grid;
  grid-template-columns: minmax(220px, 0.85fr) minmax(0, 1.6fr);
  gap: clamp(28px, 5vw, 64px);
}

.about-section {
  display: grid;
  grid-template-columns: minmax(220px, 0.85fr) minmax(0, 1.6fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.about-heading {
  max-width: 420px;
}

.about-body {
  max-width: 720px;
  padding-top: 3px;
}

.section-body p,
.contact p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 1rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.study-tools .section-heading p {
  max-width: 650px;
  margin: 0;
  color: var(--muted);
}

.tool-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.tool-card {
  display: grid;
  min-height: 190px;
  align-content: start;
  gap: 10px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 12px 34px rgba(20, 23, 26, 0.06);
}

.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.tool-card span {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.tool-card strong {
  color: var(--text);
  font-size: 1.2rem;
  line-height: 1.2;
}

.tool-card p {
  margin: 0;
  color: var(--muted);
}

.tool-card.featured {
  border-color: rgba(31, 111, 235, 0.42);
  background: linear-gradient(135deg, #ffffff, #eef5ff);
}

.card,
.entry,
.skill-group,
.contact {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.card {
  padding: 22px;
}

.card p,
.entry p,
.skill-group p {
  margin: 0;
  color: var(--muted);
}

.timeline,
.skill-groups {
  display: grid;
  gap: 14px;
}

.entry {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 22px;
}

.entry a {
  flex: 0 0 auto;
  color: var(--accent);
  font-weight: 750;
}

.skill-group {
  padding: 20px 22px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(240px, 0.75fr);
  align-items: center;
  gap: 28px;
  padding: clamp(26px, 5vw, 44px);
}

.contact-actions {
  justify-content: flex-end;
  margin-top: 0;
}

.contact-link {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  color: var(--text);
  font-weight: 750;
}

.site-footer {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 42px;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 20px;
  }

  .nav {
    justify-content: flex-start;
    gap: 12px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-top: 34px;
  }

  .hero-photo {
    width: min(330px, 100%);
    margin: 0 auto;
    order: -1;
  }

  .section-heading,
  .split,
  .contact {
    grid-template-columns: 1fr;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .tool-cards {
    grid-template-columns: 1fr;
  }

  .entry {
    flex-direction: column;
  }

  .contact-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  main,
  .site-footer {
    width: min(100% - 28px, 1120px);
  }

  .nav {
    font-size: 0.86rem;
  }

  .button,
  .contact-link {
    width: 100%;
  }

  .hero-actions,
  .contact-actions {
    width: 100%;
  }
}

/* 2026 portfolio refresh */
.site-header { max-width: 100%; padding: 15px clamp(20px,5vw,64px); }
.brand { white-space: nowrap; letter-spacing: -.025em; }
.brand-dot { color: var(--accent); }
.nav { flex-wrap: nowrap; align-items:center; gap:clamp(14px,2.5vw,32px); font-size:.88rem; }
.nav a { white-space:nowrap; }
.hero { min-height: 75vh; }
.hero-actions { gap:10px; }
.project-card { display:flex; flex-direction:column; }
.project-type { font-size:.77rem; color:var(--accent); font-weight:700; }
.project-link { margin-top:auto; color:var(--accent); font-size:.86rem; font-weight:700; }
.section-note { color:var(--muted); }
@media(max-width:600px) {
.site-header { gap:12px; flex-wrap:wrap; }
.nav { width:100%; justify-content:space-between; gap:8px; font-size:.78rem; }
.hero { padding-top:32px; }
}