:root {
  --navy: #0f2137;
  --navy-2: #172f4d;
  --ink: #1f2933;
  --muted: #5f6f82;
  --line: #d8e0e8;
  --soft: #f4f7fa;
  --white: #ffffff;
  --accent: #2d6f91;
  --accent-dark: #1e5874;
  --shadow: 0 16px 40px rgba(15, 33, 55, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid #8ecae6;
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.9rem 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  color: var(--white);
  background: var(--navy);
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0;
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
}

.nav-toggle span:not(.sr-only) {
  width: 1.25rem;
  height: 2px;
  margin: 0 auto;
  background: var(--navy);
}

.nav-links {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  display: none;
  margin: 0;
  padding: 0.75rem 1rem 1rem;
  list-style: none;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.nav-links.open {
  display: grid;
  gap: 0.35rem;
}

.nav-links a {
  display: block;
  padding: 0.75rem;
  color: var(--navy);
  font-weight: 700;
  text-decoration: none;
  border-radius: 6px;
}

.nav-links a:hover {
  background: var(--soft);
}

.section {
  padding: 4rem 1rem;
}

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

.section-inner {
  max-width: 1120px;
  margin: 0 auto;
}

.hero {
  color: var(--white);
  background: linear-gradient(135deg, var(--navy), var(--navy-2));
}

.hero-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
  min-height: 72vh;
}

.hero h1 {
  max-width: 12ch;
  margin: 0.25rem 0;
  font-size: clamp(2.6rem, 7vw, 5.5rem);
  line-height: 0.98;
}

.title {
  margin: 0;
  color: #d5e7f3;
  font-size: clamp(1.2rem, 3vw, 1.75rem);
  font-weight: 700;
}

.hero-summary {
  max-width: 66ch;
  margin: 1.25rem 0 0;
  color: #e8f0f7;
  font-size: 1.05rem;
}

.hero-panel {
  padding: 1.25rem;
  color: var(--ink);
  background: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-panel h2 {
  margin-top: 0;
  color: var(--navy);
}

.eyebrow {
  margin: 0 0 0.6rem;
  color: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 1.5rem;
}

.section-note {
  margin: 0.85rem 0 0;
  color: var(--muted);
}

.section-heading .eyebrow {
  color: var(--accent-dark);
}

h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1.1;
}

h3 {
  margin: 0 0 0.6rem;
  color: var(--navy);
  font-size: 1.1rem;
  line-height: 1.25;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.7rem 1rem;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  color: var(--navy);
  background: var(--white);
}

.button.secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.56);
}

.button:hover {
  transform: translateY(-1px);
}

.card-grid,
.skills-grid {
  display: grid;
  gap: 1rem;
}

.card,
.skill-group,
.timeline-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.card,
.skill-group {
  padding: 1.25rem;
}

.card p,
.skill-group p,
.timeline-item p {
  margin: 0;
  color: var(--muted);
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
}

.role {
  font-weight: 700;
}

.timeline-item ul {
  margin: 0;
  padding-left: 1.2rem;
}

.timeline-item li + li {
  margin-top: 0.4rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.project-card a {
  margin-top: auto;
  font-weight: 700;
}

.status {
  color: var(--navy);
  font-weight: 700;
}

.skills-grid {
  grid-template-columns: 1fr;
}

.contact-inner {
  display: grid;
  gap: 1.5rem;
}

.contact-links {
  display: grid;
  gap: 0.75rem;
  font-style: normal;
}

.site-footer {
  padding: 1.25rem;
  color: #d6e1eb;
  text-align: center;
  background: var(--navy);
}

.site-footer p {
  margin: 0;
}

@media (min-width: 720px) {
  .nav-toggle {
    display: none;
  }

  .nav-links {
    position: static;
    display: flex;
    gap: 0.35rem;
    padding: 0;
    border: 0;
  }

  .nav-links a {
    padding: 0.55rem 0.7rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.8fr);
  }

  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline-item {
    grid-template-columns: minmax(220px, 0.6fr) minmax(0, 1.4fr);
  }

  .skills-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-inner {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 0.55fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .skills-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}