:root {
  --bg: #ffffff;
  --bg-alt: #f6f9fb;
  --text: #1a1f26;
  --text-muted: #5b6572;
  --border: #e2e7ec;
  --accent: #1d6fa5;
  --accent-dark: #124b73;
  --card-bg: #ffffff;
  --tag-bg: #eef3f7;
  --tag-text: #2c3a47;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10151b;
    --bg-alt: #161d25;
    --text: #e8edf2;
    --text-muted: #9aa7b4;
    --border: #263140;
    --accent: #5db3e8;
    --accent-dark: #8fccf2;
    --card-bg: #182029;
    --tag-bg: #1f2830;
    --tag-text: #cfd9e2;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding-inline: 24px;
}

.wrap-narrow {
  max-width: 720px;
}

h1, h2, h3 { line-height: 1.2; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Nav */
.nav {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.nav-name {
  font-weight: 700;
  color: var(--text);
  font-size: 1.05rem;
}
.nav-name:hover { text-decoration: none; color: var(--accent); }

.nav-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

.nav-links a { color: var(--text-muted); }
.nav-links a:hover { color: var(--accent); text-decoration: none; }

/* Hero */
.hero {
  padding: 96px 0 64px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin: 0 0 12px;
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--text);
  margin: 0 auto 8px;
  max-width: 640px;
  font-weight: 500;
}

.hero-status {
  color: var(--text-muted);
  margin: 0 auto 32px;
  max-width: 520px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
}
.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}
.btn-primary:hover { background: var(--accent-dark); }

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}
.btn-secondary:hover { background: var(--tag-bg); }

/* Proof strip */
.proof {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 40px 0;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

@media (max-width: 720px) {
  .proof-grid { grid-template-columns: repeat(2, 1fr); }
}

.proof-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}

.proof-label {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 4px;
}

/* Sections */
.section {
  padding: 72px 0;
}

.section h2 {
  font-size: 1.7rem;
  margin: 0 0 20px;
}

.lede {
  font-size: 1.1rem;
  color: var(--text-muted);
}

.engagements { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

@media (max-width: 720px) {
  .card-grid { grid-template-columns: 1fr; }
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
}

.card h3 { margin: 0 0 4px; font-size: 1.1rem; }

.card-meta {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0 0 12px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tag {
  background: var(--tag-bg);
  color: var(--tag-text);
  font-size: 0.78rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  padding: 4px 10px;
  border-radius: 999px;
}

/* Timeline */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--border);
}

.timeline li {
  padding: 4px 0 4px 20px;
  margin-bottom: 4px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.timeline-years {
  color: var(--accent);
  font-weight: 600;
  min-width: 100px;
}

.timeline-role { color: var(--text); }

.timeline-note {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 16px;
}

/* Stack */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

@media (max-width: 720px) {
  .stack-grid { grid-template-columns: 1fr; }
}

.stack-group h3 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin: 0 0 10px;
}

/* Resume buttons */
.resume-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 20px;
}

/* Contact */
.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 1.05rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 calc(28px + env(safe-area-inset-bottom, 0px));
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.footer-inner a { color: var(--text-muted); }
.footer-inner a:hover { color: var(--accent); }