:root {
  --navy: #10233d;
  --navy-dark: #0a1626;
  --accent: #2f7a8c;
  --accent-dark: #235f6d;
  --text: #1c2733;
  --text-muted: #5a6a78;
  --bg: #ffffff;
  --bg-alt: #f5f7f9;
  --border: #e2e8ee;
  --font: -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);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  color: var(--navy);
  line-height: 1.25;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

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

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--navy);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.site-nav {
  display: flex;
  gap: 28px;
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--navy);
  border-radius: 2px;
}

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
  padding: 72px 0 64px;
  text-align: center;
}

.headshot {
  width: 148px;
  height: 148px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 4px 24px rgba(16, 35, 61, 0.15);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 2.2rem;
  margin: 0 0 6px;
}

.tagline {
  color: var(--accent-dark);
  font-weight: 600;
  font-size: 1.1rem;
  margin: 0 0 20px;
}

.hero-intro {
  max-width: 560px;
  margin: 0 auto 32px;
  color: var(--text-muted);
  font-size: 1.05rem;
}

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

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--navy);
  color: #fff;
  border: 1px solid var(--navy);
}

.btn-primary:hover {
  background: var(--navy-dark);
  border-color: var(--navy-dark);
}

.btn-secondary {
  background: transparent;
  color: var(--navy);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

/* About */
.about, .contact {
  padding: 64px 0;
}

.about {
  border-top: 1px solid var(--border);
}

.about h3 {
  margin-top: 40px;
  font-size: 1.1rem;
}

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

.highlights {
  padding-left: 20px;
  color: var(--text);
}

.highlights li {
  margin-bottom: 8px;
}

.experience {
  list-style: none;
  padding: 0;
  margin: 0;
}

.experience li {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.experience li:last-child {
  border-bottom: none;
}

.exp-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.exp-row span {
  color: var(--text-muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

.exp-sub {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 2px;
}

.education {
  margin-top: 8px;
}

/* Contact */
.contact {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  text-align: center;
}

.contact p {
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 28px;
}

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

/* Footer */
.site-footer {
  padding: 28px 0;
  text-align: center;
}

.site-footer p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0;
}

/* Mobile */
@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px 24px 20px;
    display: none;
    gap: 16px;
  }

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

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

  .exp-row {
    flex-direction: column;
    gap: 2px;
  }
}