:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f4f7fb;
  --color-bg-highlight: #0f2a4a;
  --color-text: #1c2733;
  --color-text-muted: #4d5c6c;
  --color-primary: #0e5aa7;
  --color-primary-dark: #0a3f78;
  --color-accent: #4fb3ff;
  --color-border: #e1e8f0;
  --max-width: 1080px;
  --radius: 10px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

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

h1, h2 {
  line-height: 1.2;
  color: var(--color-bg-highlight);
}

h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

p { color: var(--color-text-muted); }

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-bg-highlight);
  text-decoration: none;
}

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

.main-nav a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

.main-nav a:hover { color: var(--color-primary); }

.nav-cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 8px 16px;
  border-radius: 999px;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  display: block;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--color-bg-highlight), var(--color-primary-dark));
  color: #fff;
  padding: 96px 0 80px;
}

.hero-inner {
  max-width: var(--max-width);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

.hero-text { max-width: 700px; }

.hero-photo { flex-shrink: 0; }

.hero-photo img {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  margin: 0 0 12px;
}

.hero h1 {
  color: #fff;
  font-size: 2.4rem;
  margin: 0 0 20px;
}

.hero-lead {
  color: #dce7f5;
  font-size: 1.1rem;
  margin-bottom: 32px;
}

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

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg-highlight);
}

.btn-primary:hover { background: #7ec6ff; }

.btn-secondary {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover { background: rgba(255, 255, 255, 0.1); }

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

.section-alt { background: var(--color-bg-alt); }

.section-highlight {
  background: var(--color-bg-highlight);
  color: #fff;
}

.section-highlight h2, .section-highlight strong { color: #fff; }

.section-highlight p { color: #cfdcec; }

.availability-date {
  font-size: 1.2rem;
  color: var(--color-accent);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.question-list {
  list-style: none;
  padding: 0;
  margin: 20px 0;
}

.question-list li {
  padding: 8px 0 8px 28px;
  position: relative;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
}

.question-list li::before {
  content: "\2192";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* Tags */
.tag-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0;
}

.tag {
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 500;
}

.tag-hash {
  background: var(--color-bg-alt);
  color: var(--color-primary);
  border-color: transparent;
}

/* Timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 32px 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  padding: 20px 0;
  border-top: 1px solid var(--color-border);
}

.timeline-item:first-child { border-top: none; }

.timeline-period {
  font-weight: 600;
  color: var(--color-primary);
  padding-top: 4px;
}

.timeline-content h3 {
  margin: 0 0 4px;
  color: var(--color-bg-highlight);
  font-size: 1.1rem;
}

.timeline-org {
  font-weight: 600;
  color: var(--color-text-muted);
  margin: 0 0 8px;
}

.cert-block { margin-top: 32px; }

.cert-block h3 {
  color: var(--color-bg-highlight);
  margin-bottom: 8px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 32px 0;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.contact-item:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(14, 90, 167, 0.12);
}

.contact-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.contact-value {
  font-weight: 600;
  color: var(--color-bg-highlight);
}

/* Footer */
.site-footer {
  padding: 24px 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
}

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: none;
}

/* Responsive */
@media (max-width: 800px) {
  .two-col { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .main-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px;
    border-bottom: 1px solid var(--color-border);
    display: none;
    gap: 16px;
  }

  .main-nav.is-open { display: flex; }

  .nav-toggle { display: flex; }

  .hero h1 { font-size: 1.8rem; }

  .hero-inner {
    flex-direction: column-reverse;
    text-align: center;
  }

  .hero-actions { justify-content: center; }

  .hero-photo img { width: 160px; height: 160px; }

  .timeline-item { grid-template-columns: 1fr; }

  .timeline-period { padding-top: 0; }
}