*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  color-scheme: dark;
  --bg: #0b1120;
  --surface: #111a2e;
  --border: #1f2a44;
  --subtle: #94a3b8;
  --text: #e5e7eb;
  --text-muted: #94a3b8;
  --accent: #2dd4bf;
  --accent-hover: #5eead4;
  --accent-soft: #0f2a2c;
  --on-accent: #04201d;
  --max-w: 1040px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
}

/* ── NAV ─────────────────────────────────────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
nav ul { list-style: none; display: flex; gap: 2rem; }
nav ul a {
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: color 0.2s;
}
nav ul a:hover { color: var(--accent); }

/* ── HERO ────────────────────────────────────────── */
#home {
  padding-top: 64px;
  min-height: 100vh;
  display: flex;
  align-items: center;
}
.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5rem 2.5rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 5rem;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.375rem 1rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
}
.hero-badge::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
}
.hero-inner h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.75rem, 5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
  color: var(--text);
}
.hero-tagline {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 460px;
  font-weight: 400;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}
.btn-green {
  background: var(--accent);
  color: var(--on-accent);
  text-decoration: none;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  transition: background 0.2s;
}
.btn-green:hover { background: var(--accent-hover); }
.btn-outline-brown {
  border: 1.5px solid var(--border);
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  transition: border-color 0.2s;
}
.btn-outline-brown:hover { border-color: var(--subtle); color: var(--text); }
.hero-photo-wrap {
  position: relative;
}
.hero-photo-wrap img {
  width: 240px;
  height: 300px;
  object-fit: cover;
  object-position: top;
  border-radius: 20px;
  border: 2px solid var(--accent);
}
.hero-photo-badge {
  position: absolute;
  bottom: -1rem;
  left: -1.5rem;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.625rem 1.1rem;
  border-radius: 100px;
  white-space: nowrap;
}

/* ── SECTIONS SHARED ─────────────────────────────── */
section + section { border-top: 1px solid var(--border); }
.section-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5rem 2.5rem;
}
.section-kicker {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.section-wrap h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2.5rem;
  line-height: 1.2;
}

/* ── ABOUT ───────────────────────────────────────── */
.about-body {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 4rem;
  align-items: start;
}
.about-text p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-size: 1rem;
  line-height: 1.8;
}
.about-text p strong { color: var(--text); font-weight: 700; }
.principle-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.principle-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
}
.principle-card .number {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--subtle);
  margin-bottom: 0.5rem;
}
.principle-card blockquote {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.9375rem;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 0.625rem;
}
.principle-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.65;
}
.interests {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.interest-tag {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.3rem 0.875rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 600;
}

a.inline-link { color: var(--accent); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
a.inline-link:hover { color: var(--text); }

/* ── PERSONAL PAGE ───────────────────────────────── */
.page-intro { padding-top: 64px; }
.page-intro .section-wrap { padding-bottom: 3rem; }
.page-intro p { color: var(--text-muted); font-size: 1.05rem; line-height: 1.8; max-width: 760px; margin-bottom: 1.25rem; }
.page-intro p strong { color: var(--text); font-weight: 700; }
#writing { background: var(--surface); }
.writing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }

/* ── AI TRANSFORMATION ───────────────────────────── */
.ai-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.ai-pillar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 1.75rem;
  transition: border-color 0.2s, transform 0.15s;
}
.ai-pillar:hover { border-color: var(--accent); transform: translateY(-2px); }
.ai-pillar i { display: block; color: var(--accent); font-size: 1.25rem; margin-bottom: 0.85rem; }
.ai-pillar h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.75rem;
}
.ai-pillar ul { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }
.ai-pillar li {
  position: relative;
  padding-left: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.ai-pillar li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.6em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.ai-pillar li strong { color: var(--text); font-weight: 600; }

/* ── LEADERSHIP ──────────────────────────────────── */
.lead-intro {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  max-width: 760px;
  margin-bottom: 2.75rem;
}
.lead-intro strong { color: var(--text); font-weight: 700; }
.lead-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.lead-stat {
  border-left: 2px solid var(--accent);
  padding-left: 1rem;
}
.lead-stat-num {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  letter-spacing: -0.02em;
}
.lead-stat-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 0.6rem;
  line-height: 1.4;
}
.lead-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.lead-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 1.75rem;
  transition: border-color 0.2s, transform 0.15s;
}
.lead-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.lead-card i {
  display: block;
  color: var(--accent);
  font-size: 1.25rem;
  margin-bottom: 0.85rem;
}
.lead-card h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.lead-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── PROJECTS ────────────────────────────────────── */
#projects { background: var(--surface); }
.projects-split { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.projects-col h3 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--subtle);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.project-cards { display: flex; flex-direction: column; gap: 0.75rem; }

/* Work project cards — clickable */
.project-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.15s;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}
.project-card:hover {
  border-color: var(--accent);
  transform: translateX(3px);
}
.project-card h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--text);
  transition: color 0.2s;
}
.project-card:hover h4 { color: var(--accent); }
.project-card p { font-size: 0.8125rem; color: var(--text-muted); }
.project-card-icon {
  color: var(--border);
  font-size: 0.75rem;
  flex-shrink: 0;
  margin-top: 0.25rem;
  transition: color 0.2s;
}
.project-card:hover .project-card-icon { color: var(--accent); }

/* Writing cards */
.writing-cards { display: flex; flex-direction: column; gap: 0.75rem; }
.writing-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  transition: border-color 0.2s;
}
.writing-card:hover { border-color: var(--accent); }
.writing-card h4 { font-size: 0.9375rem; font-weight: 700; margin-bottom: 0.25rem; color: var(--text); }
.writing-card p { font-size: 0.8125rem; color: var(--text-muted); line-height: 1.5; }
.writing-card-source { font-size: 0.75rem; color: var(--subtle); font-weight: 600; margin-top: 0.35rem; }
.writing-arrow {
  color: var(--border);
  font-size: 0.875rem;
  flex-shrink: 0;
  margin-top: 0.25rem;
  transition: color 0.2s;
}
.writing-card:hover .writing-arrow { color: var(--accent); }

/* ── MODAL ───────────────────────────────────────── */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(3, 6, 13, 0.7);
  backdrop-filter: blur(4px);
  z-index: 500;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  max-width: 560px;
  width: 100%;
  padding: 2rem 2.25rem;
  position: relative;
  animation: modal-in 0.2s ease;
}
@keyframes modal-in {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-close {
  position: absolute;
  top: 1rem; right: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 32px; height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: background 0.15s, color 0.15s;
}
.modal-close:hover { background: var(--border); color: var(--text); }
.modal-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.625rem;
}
.modal h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1rem;
  line-height: 1.3;
  padding-right: 1.5rem;
}
.modal p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ── BOOKSHELF ───────────────────────────────────── */
.books-layout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem 4rem;
}
.book-group h3 {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--subtle);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.book-group h3::before {
  content: '';
  width: 20px; height: 2px;
  background: var(--accent);
}
.book-group ul { list-style: none; display: flex; flex-direction: column; gap: 0.625rem; }
.book-group ul li { display: flex; flex-direction: column; gap: 0.15rem; }
.book-group ul a {
  text-decoration: none;
  font-size: 0.9375rem;
  color: var(--text-muted);
  font-weight: 600;
  transition: color 0.2s;
  display: flex;
  gap: 0.5rem;
  align-items: baseline;
}
.book-group ul a::before {
  content: '·';
  color: var(--accent);
  font-weight: 900;
  flex-shrink: 0;
}
.book-group ul a:hover { color: var(--text); }
.book-note {
  font-size: 0.8125rem;
  color: #64748b;
  padding-left: 0.875rem;
  line-height: 1.45;
}

/* ── CONTACT ─────────────────────────────────────── */
#contact { background: #060b16; color: var(--text); }
#contact .section-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
#contact .section-kicker { color: var(--accent); }
#contact h2 { color: var(--text); }
.contact-tagline { color: var(--text-muted); font-size: 1.05rem; line-height: 1.75; }
.social-stack { display: flex; flex-direction: column; gap: 0.75rem; }
.social-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: rgba(229,231,235,0.75);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 0.875rem 1.25rem;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  transition: border-color 0.2s, color 0.2s;
}
.social-item:hover { border-color: var(--accent); color: white; }
.social-item i { color: var(--accent); width: 16px; text-align: center; }

/* ── FOOTER ──────────────────────────────────────── */
footer {
  background: #03060d;
  color: rgba(229,231,235,0.3);
  font-size: 0.8125rem;
  padding: 1.5rem 2.5rem;
  display: flex;
  justify-content: space-between;
  max-width: 100%;
}

/* ── RESPONSIVE ──────────────────────────────────── */
@media (max-width: 720px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2rem; }
  .hero-photo-wrap { display: flex; justify-content: center; }
  .about-body { grid-template-columns: 1fr; gap: 2rem; }
  .lead-stats { grid-template-columns: repeat(2, 1fr); }
  .lead-cards { grid-template-columns: 1fr; }
  .ai-pillars { grid-template-columns: 1fr; }
  .projects-split { grid-template-columns: 1fr; }
  .books-layout { grid-template-columns: 1fr; }
  .writing-grid { grid-template-columns: 1fr; }
  nav ul { gap: 1.25rem; }
  .nav-secondary { display: none; }
  .nav-inner, .section-wrap, .hero-inner { padding-left: 1rem; padding-right: 1rem; }
  #contact .section-wrap { grid-template-columns: 1fr; }
}