:root {
  --color-ink: #18212f;
  --color-muted: #5e6b7f;
  --color-line: #d8e1ec;
  --color-surface: #ffffff;
  --color-soft: #f4f7fb;
  --color-primary: #123c69;
  --color-primary-strong: #0b2949;
  --color-accent: #0f8b8d;
  --shadow: 0 18px 50px rgba(18, 60, 105, 0.12);
  --radius: 8px;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-ink);
  background: var(--color-surface);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

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

:focus-visible {
  outline: 3px solid rgba(15, 139, 141, 0.45);
  outline-offset: 4px;
}

.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;
}

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 100;
  transform: translateY(-160%);
  border-radius: var(--radius);
  padding: 0.7rem 1rem;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(216, 225, 236, 0.82);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 2rem, var(--max-width));
  min-height: 72px;
  margin: 0 auto;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  text-decoration: none;
}

.brand img {
  border-radius: 50%;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  color: var(--color-muted);
  font-size: 0.93rem;
  font-weight: 700;
  text-decoration: none;
}

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #fff;
  cursor: pointer;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--color-primary);
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  align-items: center;
  gap: 3rem;
  width: min(100% - 2rem, var(--max-width));
  min-height: calc(100vh - 72px);
  margin: 0 auto;
  padding: 4rem 0;
}

.hero-copy {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1rem;
  color: var(--color-primary-strong);
  font-size: clamp(3rem, 8vw, 5.8rem);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  color: var(--color-primary-strong);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.05;
}

h3 {
  color: var(--color-primary-strong);
  font-size: 1.12rem;
  line-height: 1.3;
}

.hero-lede {
  max-width: 58ch;
  color: var(--color-muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0.75rem 1.15rem;
  font-weight: 800;
  text-decoration: none;
}

.button-primary {
  background: var(--color-primary);
  color: #fff;
}

.button-primary:hover {
  background: var(--color-primary-strong);
  color: #fff;
}

.button-secondary {
  border-color: var(--color-line);
  background: #fff;
  color: var(--color-primary);
}

.hero-visual {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-soft);
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.section {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
  padding: 5.5rem 0;
}

.section-muted {
  width: 100%;
  max-width: none;
  padding-right: max(1rem, calc((100vw - var(--max-width)) / 2));
  padding-left: max(1rem, calc((100vw - var(--max-width)) / 2));
  background: var(--color-soft);
}

.section-heading {
  max-width: 680px;
  margin-bottom: 2.25rem;
}

.about-grid,
.education-grid,
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.panel,
.skills-card,
.contact-card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #fff;
  padding: 1.35rem;
  box-shadow: 0 10px 30px rgba(18, 60, 105, 0.06);
}

.panel p,
.skills-card p,
.timeline p,
.education-grid p {
  color: var(--color-muted);
}

.skill-list {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.skill-list li {
  display: grid;
  gap: 0.35rem;
}

.skill-list span {
  font-weight: 800;
}

meter {
  width: 100%;
  height: 0.8rem;
}

meter::-webkit-meter-bar {
  border: 0;
  border-radius: 999px;
  background: #dce8f2;
}

meter::-webkit-meter-optimum-value {
  border-radius: 999px;
  background: var(--color-accent);
}

meter::-moz-meter-bar {
  border-radius: 999px;
  background: var(--color-accent);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.timeline article,
.portfolio-card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #fff;
  padding: 1.1rem;
}

.timeline article {
  min-height: 185px;
}

.timeline time,
.date-label {
  display: block;
  margin-bottom: 0.85rem;
  color: var(--color-accent);
  font-size: 0.86rem;
  font-weight: 800;
}

.timeline h3 {
  margin-bottom: 0.45rem;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.portfolio-card {
  display: grid;
  align-content: start;
  gap: 1rem;
  min-height: 240px;
  color: var(--color-primary-strong);
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.portfolio-card:hover {
  transform: translateY(-3px);
  color: var(--color-primary-strong);
  box-shadow: var(--shadow);
}

.portfolio-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: calc(var(--radius) - 2px);
  object-fit: cover;
  background: var(--color-soft);
}

.contact-section {
  padding-bottom: 4rem;
}

.contact-card {
  display: grid;
  gap: 0.35rem;
  color: var(--color-primary-strong);
  font-style: normal;
  font-weight: 800;
  overflow-wrap: anywhere;
  text-decoration: none;
}

.contact-card span {
  color: var(--color-muted);
  font-size: 0.82rem;
  text-transform: uppercase;
}

.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 1.5rem 1rem;
  color: var(--color-muted);
  text-align: center;
}

.site-footer p {
  margin: 0;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 980px) {
  .hero-section {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-visual {
    max-width: 560px;
  }

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

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    padding: 0.75rem;
    background: #fff;
    box-shadow: var(--shadow);
  }

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

  .nav-links a {
    display: block;
    padding: 0.7rem 0.35rem;
  }

  .hero-section,
  .section {
    width: min(100% - 1.25rem, var(--max-width));
    padding: 3.5rem 0;
  }

  .section-muted {
    width: 100%;
    padding-right: 0.625rem;
    padding-left: 0.625rem;
  }

  .about-grid,
  .education-grid,
  .contact-grid,
  .timeline,
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .timeline article {
    min-height: 0;
  }
}