/* ============================================================
   Layout: Header, Nav, Footer, Hero
   ============================================================ */

/* ── Header / Navbar ────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 70px;
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition),
              border-color var(--transition), backdrop-filter var(--transition);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(10,15,26,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-md);
}
[data-theme="light"] .site-header.scrolled {
  background: rgba(243,244,246,0.92);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 2rem;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo-mark {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.05em;
  line-height: 1;
}
.nav-logo-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-heading);
  letter-spacing: -0.01em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-link {
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  color: var(--accent);
  background: var(--accent-glow2);
}
.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.nav-btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.8rem;
  font-weight: 600;
  font-family: inherit;
  min-height: 38px;
}
.nav-btn-icon:hover {
  background: var(--accent-glow2);
  border-color: var(--accent);
  color: var(--accent);
}
.nav-hamburger {
  display: none;
}

/* ── Mobile Menu ────────────────────────────────────────────── */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  z-index: 999;
  flex-direction: column;
  padding: 5rem 2rem 2rem;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity var(--transition), transform var(--transition);
}
.mobile-menu.open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}
.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.mobile-nav-link {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.mobile-nav-link:hover, .mobile-nav-link.active {
  background: var(--accent-glow);
  color: var(--accent);
}
.mobile-menu-controls {
  display: flex;
  gap: 1rem;
  margin-top: auto;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.mobile-close {
  position: absolute;
  top: 1.25rem; right: 1.5rem;
  background: none; border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0.5rem;
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
}

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--bg-sidebar);
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  margin-top: 4rem;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.footer-brand { display: flex; flex-direction: column; gap: 0.25rem; }
.footer-logo-mark {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.04em;
  line-height: 1;
}
.footer-tagline {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.footer-nav { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.footer-nav a {
  font-size: 0.82rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--accent); }
.footer-sep { color: var(--border); font-size: 0.7rem; }
.footer-social {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all var(--transition);
}
.footer-social a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow2);
}
.footer-copy {
  width: 100%;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
}

/* ── Hero Section ───────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 70px;
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.875rem;
  background: var(--accent-glow);
  border: 1px solid rgba(40,175,176,0.25);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 1.25rem;
}
.hero-eyebrow::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100%{ opacity:1; transform:scale(1); }
  50%{ opacity:0.5; transform:scale(0.85); }
}
.hero-name {
  font-size: clamp(2.4rem,5.5vw,3.75rem);
  font-weight: 800;
  color: var(--text-heading);
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin-bottom: 0.5rem;
}
.hero-title {
  font-size: clamp(1.1rem,2.5vw,1.35rem);
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
}
.hero-bio {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 500px;
  margin-bottom: 2rem;
}
.hero-ctas {
  display: flex;
  gap: 0.875rem;
  flex-wrap: wrap;
}
.hero-image-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}
.hero-image-ring {
  position: relative;
  width: 340px; height: 340px;
  flex-shrink: 0;
}
.hero-image-ring::before {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: conic-gradient(var(--accent) 0deg, var(--accent-dark) 180deg, transparent 360deg);
  animation: spin 8s linear infinite;
  z-index: 0;
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.hero-image-ring::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: var(--bg-page);
  z-index: 1;
}
.hero-photo {
  position: relative;
  z-index: 2;
  width: 100%; height: 100%;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}
.hero-avatar-fallback {
  position: relative;
  z-index: 2;
  width: 100%; height: 100%;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.05em;
  box-shadow: var(--shadow-glow);
}
.hero-glow {
  position: absolute;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}

@media (max-width: 768px) {
  .hero { min-height: unset; padding-top: 90px; padding-bottom: 3rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; text-align: center; }
  .hero-grid > *:first-child { order: 2; }
  .hero-image-wrap { order: 1; }
  .hero-image-ring { width: 220px; height: 220px; }
  .hero-bio { margin-left: auto; margin-right: auto; }
  .hero-ctas { justify-content: center; }
}