:root {
  --color-navy: #06183e;
  --color-navy-light: #0c2a63;
  --color-bg: #ffffff;
  --color-bg-alt: #eef2f8;
  --color-surface: #ffffff;
  --color-primary: #0078ff;
  --color-primary-dark: #0058c4;
  --color-accent: #00e5ff;
  --color-text: #0b1220;
  --color-text-muted: #5b6579;
  --color-border: #dde4ef;
  --font-sans: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

.narrow { max-width: 760px; }

h1, h2, h3 {
  font-family: var(--font-sans);
  font-weight: 800;
  color: var(--color-navy);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

a { color: var(--color-primary); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(6, 24, 62, 0.95);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.1rem;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.brand-sub {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 600;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
}

.site-nav a:hover { color: var(--color-accent); }

.lang-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  padding: 3px;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.6);
  padding: 5px 11px;
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease;
}

.lang-btn:hover { color: #ffffff; }

.lang-btn svg {
  display: block;
  border-radius: 2px;
  flex-shrink: 0;
}

.lang-btn.lang-active {
  background: var(--color-primary);
  color: #ffffff;
}

.nav-cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 9px 20px;
  border-radius: 999px;
  box-shadow: 0 4px 16px rgba(0, 120, 255, 0.35);
}

.nav-cta:hover { background: var(--color-primary-dark); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: #ffffff;
  display: block;
}

/* Hero */
.hero {
  padding: 88px 0 96px;
  background:
    radial-gradient(60% 50% at 50% 0%, rgba(0, 229, 255, 0.18) 0%, rgba(0, 229, 255, 0) 70%),
    linear-gradient(180deg, var(--color-navy) 0%, #081d4a 55%, var(--color-navy-light) 100%);
  text-align: center;
}

.hero-photo {
  width: 148px;
  height: 148px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 28px;
  display: block;
  border: 3px solid rgba(0, 229, 255, 0.5);
  box-shadow: 0 0 0 8px rgba(0, 229, 255, 0.08), 0 12px 32px rgba(0, 0, 0, 0.35);
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.35);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
}

.hero h1 {
  font-size: clamp(2.3rem, 5vw, 3.4rem);
  margin: 0 0 10px;
  color: #ffffff;
}

.text-gradient {
  background: linear-gradient(90deg, #ffffff 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-role {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.72);
  margin: 0 0 24px;
  font-weight: 600;
}

.hero-lede {
  max-width: 640px;
  margin: 0 auto 32px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 700;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 120, 255, 0.4);
}
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-1px); }

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.25);
}
.btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* Sections */
.section { padding: 76px 0; }
.section-alt { background: var(--color-bg-alt); }

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin: 0 0 28px;
}

.centered { text-align: center; }
.muted { color: var(--color-text-muted); }

.subhead {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-navy);
  margin: 0 0 16px;
}

.subhead-spaced { margin-top: 40px; }

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 640px;
  margin: 0 auto 24px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 22px 20px;
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 8px 24px rgba(0, 120, 255, 0.12);
}

.pill-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 18px 12px;
  text-align: center;
  font-weight: 700;
  color: var(--color-navy);
}

/* Timeline */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.timeline li {
  display: flex;
  gap: 16px;
  align-items: baseline;
}

.timeline-year {
  flex: 0 0 auto;
  font-weight: 800;
  color: var(--color-primary);
  font-size: 1rem;
  min-width: 44px;
}

.timeline p {
  margin: 2px 0 0;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

/* Credentials */
.credential-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.credential-list li {
  border-left: 3px solid var(--color-primary);
  padding-left: 14px;
  font-size: 0.94rem;
}

.cred-no {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.82rem;
  margin-top: 2px;
}

/* Tag cloud */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-cloud span {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-primary-dark);
}

/* Contact */
.section-contact {
  background:
    radial-gradient(50% 80% at 50% 100%, rgba(0, 229, 255, 0.15) 0%, rgba(0, 229, 255, 0) 70%),
    linear-gradient(180deg, var(--color-navy-light) 0%, var(--color-navy) 100%);
  color: #ffffff;
}
.section-contact .section-title { color: #ffffff; }
.section-contact .hero-lede { color: rgba(255, 255, 255, 0.7); }

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

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  padding: 20px;
  text-decoration: none;
  color: #ffffff;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.contact-item:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--color-accent);
}

.contact-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--color-accent);
}

.contact-value { font-size: 1.05rem; font-weight: 700; }

/* Footer */
.site-footer {
  background: var(--color-navy);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 28px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

.footer-inner p { margin: 4px 0; }

/* Responsive */
@media (max-width: 860px) {
  .grid-2 { grid-template-columns: 1fr; gap: 32px; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }

  .nav-toggle { display: flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-navy);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px 24px;
    gap: 16px;
    display: none;
  }

  .site-nav.open { display: flex; }

  .nav-cta { align-self: flex-start; }
}