:root {
  /* Core palette — dark mode default */
  --color-bg: #0c0f11;
  --color-surface: #111418;
  --color-surface-alt: #0d1310;
  --color-border: #232a2f;

  /* Text */
  --color-text: #e7e9ec;
  --color-text-secondary: #c6cdd3;

  /* Brand */
  --brand-primary: #163024;
  --brand-navy: #1b4332;
  --brand-navy-strong: #2d6a4f;
  --brand-accent: #52b788;
  --brand-accent-hover: #76c99f;

  /* Links */
  --color-link: #74c69d;
  --color-link-hover: #96e2b8;

  /* Layout */
  --radius: 0.5rem;
  --radius-sm: 0.35rem;
  --shadow-subtle: 0 1px rgba(0, 0, 0, 0.25), 0 8px 18px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 1px rgba(0, 0, 0, 0.35), 0 12px 26px rgba(0, 0, 0, 0.45);

  --space-xs: clamp(0.75rem, 0.7rem + 0.25vw, 1rem);
  --space-sm: clamp(1rem, 0.9rem + 0.5vw, 1.5rem);
  --space-md: clamp(1.5rem, 1.25rem + 1.25vw, 2.5rem);
  --space-lg: clamp(2rem, 1.5rem + 2.5vw, 4rem);

  --max-width: 75rem;
}

* {
  box-sizing: border-box;
  margin: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  font-size: 16px;
  line-height: 1.55;
  color: var(--color-text);
  background: var(--color-bg);
}

.container {
  width: min(var(--max-width), calc(100% - 2 * var(--space-sm)));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(12, 15, 17, 0.82);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-sm);
  align-items: center;
  padding-block: var(--space-xs);
}

.brand {
  color: #f1f3f5;
  font-weight: 700;
  letter-spacing: 0.2px;
  text-decoration: none;
}

.primary-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.nav-link {
  color: #b8c2cb;
  text-decoration: none;
  font-weight: 500;
  padding: 0.35rem 0.2rem;
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-link-hover);
}

.nav-link[aria-current="page"],
.nav-link.active {
  color: var(--brand-accent);
  border-bottom-color: var(--brand-navy-strong);
}

/* Sections */
.section {
  padding-block: var(--space-lg);
}

.section-alt {
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

h1, h2, h3 {
  line-height: 1.25;
  color: #f3f5f7;
  font-weight: 700;
  letter-spacing: -0.2px;
}

h1 { font-size: clamp(1.6rem, 1.3rem + 1.5vw, 2.4rem); }
h2 { font-size: clamp(1.25rem, 1.15rem + 0.5vw, 1.55rem); margin-top: 0.5em; }
h3 { font-size: clamp(1.05rem, 1rem + 0.3vw, 1.2rem); }

.lede {
  max-width: 72ch;
  color: var(--color-text-secondary);
  margin-block: var(--space-sm);
}

.prose {
  max-width: 72ch;
}

.prose > * + * {
  margin-top: 1em;
}

/* Hero */
.hero {
  padding-block: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-md);
  align-items: center;
  justify-items: end;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  justify-self: start;
}

.hero-greeting {
  font-weight: 600;
  color: #d6dfe6;
  margin-bottom: 0.15rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

.portrait {
  display: block;
  height: 375px;
  width: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-subtle);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0.65rem 1rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
}

.btn-primary {
  background: var(--brand-navy-strong);
  color: #fff;
  border-color: var(--brand-navy-strong);
}

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

.btn-secondary {
  background: var(--color-surface);
  color: var(--brand-accent);
  border-color: var(--brand-navy-strong);
}

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

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(26rem, 100%), 1fr));
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.card {
  background: #0e1316;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-sm);
  box-shadow: var(--shadow-subtle);
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.card:hover {
  transform: translateY(-1px);
  box-shadow: 0 1px rgba(0, 0, 0, 0.35), 0 12px 26px rgba(0, 0, 0, 0.45);
}

.card h3 {
  margin-bottom: 0.3rem;
  color: var(--brand-accent);
}

.card .meta {
  color: #a0a9b1;
  font-size: 0.9rem;
  margin-top: 0.4rem;
}

.link {
  display: inline-block;
  text-decoration: none;
  color: var(--color-link);
  font-weight: 600;
  border-bottom: 1px solid transparent;
}

.link:hover {
  color: var(--color-link-hover);
  border-bottom-color: currentColor;
}

.contact-list {
  list-style: none;
  display: grid;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

.contact-list a {
  text-decoration: none;
  color: var(--color-link);
  font-weight: 600;
}

.contact-list a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

/* Skills */
.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin-top: 0.75rem;
  padding: 0;
}

.skill-list li {
  background: #0f1618;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  font-size: 0.92rem;
  color: #d5dbe1;
}

/* Timeline */
.timeline {
  margin-top: var(--space-sm);
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 1.1rem;
  bottom: 1.1rem;
  width: 2px;
  background: var(--color-border);
  border-radius: 999px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.75rem;
  position: relative;
}

.timeline-item + .timeline-item {
  margin-top: 1.5rem;
}

.timeline-meta {
  display: flex;
  justify-content: center;
  padding-top: 0.45rem;
}

.timeline-meta::before {
  content: "";
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  background: var(--brand-navy-strong);
  border: 2px solid var(--brand-accent);
  opacity: 0.95;
  flex-shrink: 0;
}

.timeline-content {
  padding-bottom: 0;
}

.timeline-content > * + * {
  margin-top: 1em;
}

.timeline-content h3 {
  margin-bottom: 0.2rem;
}

.timeline-content .meta {
  color: #a0a9b1;
  font-size: 0.9rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-sm);
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.site-footer .container {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-sm);
  align-items: center;
}

.footer-links {
  display: flex;
  gap: var(--space-xs);
}

/* Utilities */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-xs);
}

/* Mobile */
@media (max-width: 640px) {
  .site-header .container {
    grid-template-columns: 1fr;
    gap: 0.4rem;
    padding-block: 0.6rem;
  }

  .primary-nav {
    justify-content: flex-start;
    gap: 0.25rem;
  }

  .site-footer .container {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    justify-items: center;
  }

  .hero-copy {
    justify-self: center;
    text-align: center;
  }

  .portrait {
    height: 220px;
  }
}

/* Print */
@media print {
  .site-header,
  .site-footer,
  .hero-actions,
  .actions {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
  }

  a {
    color: #000;
    text-decoration: none;
  }
}