/* ---------- Tokens ---------- */
:root {
  --bg: #0a0e14;
  --bg-elevated: #11161f;
  --bg-card: #131a24;
  --border: #1f2836;
  --text: #e8edf4;
  --text-dim: #93a1b5;
  --text-faint: #5b6779;
  --accent: #22d3ee;
  --accent-2: #38bdf8;
  --accent-soft: rgba(34, 211, 238, 0.12);
  --green: #34d399;
  --green-soft: rgba(52, 211, 153, 0.14);
  --amber: #f0b429;
  --radius: 14px;
  --font-head: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --maxw: 1100px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: var(--font-head); font-weight: 600; line-height: 1.15; margin: 0; }
p { margin: 0 0 1em; color: var(--text-dim); }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }
ul, ol { padding: 0; margin: 0; list-style: none; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #05202a;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 200;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn-primary {
  background: var(--accent);
  color: #04222c;
}
.btn-primary:hover { background: var(--accent-2); color: #04222c; transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-small { padding: 8px 16px; font-size: 0.85rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(10, 14, 20, 0.75);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
}
.brand-dot { color: var(--accent); }
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav a:not(.btn) {
  color: var(--text-dim);
  font-size: 0.95rem;
  font-weight: 500;
}
.nav a:not(.btn):hover { color: var(--text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 18px;
  margin: 0 auto;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 96px 0 72px;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, black 40%, transparent 100%);
}
.hero-inner { position: relative; }
.eyebrow {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  max-width: 15ch;
  color: var(--text);
  margin-bottom: 22px;
}
.accent { color: var(--accent); }
.hero-lede {
  max-width: 62ch;
  font-size: 1.1rem;
  color: var(--text-dim);
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin: 28px 0 48px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 20px;
  border-top: 1px solid var(--border);
  padding-top: 28px;
}
.hero-stats li { display: flex; flex-direction: column; gap: 4px; }
.hero-stats strong {
  font-family: var(--font-head);
  font-size: 1.6rem;
  color: var(--text);
}
.hero-stats span { font-size: 0.85rem; color: var(--text-faint); }

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-elevated); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-kicker {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-title {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  color: var(--text);
  margin-bottom: 16px;
}
.section-sub { max-width: 62ch; font-size: 1.05rem; margin-bottom: 40px; }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 48px;
  align-items: start;
  margin-top: 32px;
}
.about-copy p { font-size: 1.02rem; }
.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.about-card h3 { color: var(--text); font-size: 1.05rem; margin-bottom: 18px; }
.about-card dl { margin: 0; }
.about-card dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 14px;
}
.about-card dd { margin: 4px 0 0; color: var(--text); font-size: 0.95rem; }

/* ---------- Timeline ---------- */
.timeline { margin-top: 40px; border-left: 2px solid var(--border); }
.timeline-item {
  position: relative;
  padding: 0 0 40px 32px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dates {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.02em;
}
.timeline-content h3 { color: var(--text); font-size: 1.15rem; margin-top: 6px; }
.timeline-org { font-size: 0.95rem; color: var(--text-faint); margin: 4px 0 12px; }
.timeline-content ul { margin-top: 10px; }
.timeline-content li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 0.96rem;
  color: var(--text-dim);
}
.timeline-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.earlier-career { margin-top: 8px; }
.earlier-career summary {
  cursor: pointer;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 14px 0;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.earlier-career summary::-webkit-details-marker { display: none; }
.earlier-career .chev { transition: transform 0.2s ease; color: var(--accent); }
.earlier-career[open] .chev { transform: rotate(180deg); }
.timeline-compact { margin-top: 8px; }

/* ---------- Projects ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 40px;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.project-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.project-card.featured {
  grid-column: 1 / -1;
  border-color: rgba(52, 211, 153, 0.4);
  background: linear-gradient(160deg, var(--green-soft), var(--bg-card) 60%);
}
.featured-body {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 32px;
  margin: 8px 0 20px;
}
.featured-intro p { font-size: 0.98rem; }
.featured-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 12px;
  font-size: 0.92rem;
  color: var(--text-dim);
}
.featured-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}
.featured-list strong { color: var(--text); }

@media (max-width: 720px) {
  .featured-body { grid-template-columns: 1fr; }
}
.project-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-2);
  border: 1px solid rgba(34, 211, 238, 0.25);
  letter-spacing: 0.02em;
}
.tag-food { background: rgba(240, 180, 41, 0.12); color: var(--amber); border-color: rgba(240, 180, 41, 0.3); }
.tag-founder, .tag-entrepreneur { background: var(--green-soft); color: var(--green); border-color: rgba(52, 211, 153, 0.35); }

.project-card h3 { color: var(--text); font-size: 1.2rem; margin-bottom: 6px; }
.project-loc { font-size: 0.85rem; color: var(--text-faint); margin-bottom: 12px; font-family: var(--font-mono); }
.project-card p { font-size: 0.95rem; flex-grow: 1; }
.project-stack { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.project-stack li {
  font-size: 0.78rem;
  color: var(--text-faint);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 999px;
}
.project-link { display: inline-block; margin-top: 16px; font-weight: 600; font-size: 0.9rem; }

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 32px;
}
.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
}
.skill-card h3 { color: var(--text); font-size: 1rem; margin-bottom: 16px; }
.pill-list { display: flex; flex-wrap: wrap; gap: 8px; }
.pill-list li {
  font-size: 0.82rem;
  color: var(--text-dim);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 999px;
}

.patents { margin-top: 48px; }
.patents h3 { color: var(--text); font-size: 1.1rem; margin-bottom: 18px; }
.patents ul { display: flex; flex-direction: column; gap: 12px; }
.patents li { font-size: 0.92rem; color: var(--text-dim); padding-left: 4px; }
.patent-id { font-family: var(--font-mono); color: var(--accent); font-size: 0.85rem; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 48px;
  margin-top: 40px;
}
.contact-links { display: flex; flex-direction: column; gap: 18px; }
.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-size: 1rem;
  font-weight: 500;
}
.contact-link:hover { color: var(--accent); }
.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--accent);
  flex-shrink: 0;
}
.contact-icon svg { width: 18px; height: 18px; }
.contact-location {
  margin-top: 12px;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.contact-form label {
  font-size: 0.82rem;
  color: var(--text-faint);
  margin-top: 12px;
  font-family: var(--font-mono);
}
.contact-form input,
.contact-form textarea {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 11px 14px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.contact-form .btn { margin-top: 20px; align-self: flex-start; }
.hidden-field { position: absolute; left: -9999px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 32px 0; }
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-inner p { margin: 0; font-size: 0.85rem; color: var(--text-faint); }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 0.85rem; color: var(--text-dim); }
.footer-links a:hover { color: var(--accent); }

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px 28px;
    gap: 16px;
    transform: translateY(-130%);
    opacity: 0;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }
  .nav.is-open { transform: translateY(0); opacity: 1; }
  .nav-toggle { display: flex; }
  .nav a.btn { margin-top: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}