:root {
  --font-primary: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', var(--font-primary);
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --bg: #0a0c0a;
  --surface: #12160f;
  --muted-surface: #181f15;
  --text: #f2f5ec;
  --muted: #8fa089;
  --accent: #3fcb77;
  --accent-strong: #2e9c5c;
  --border: rgba(63, 203, 119, 0.16);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  --max-width: 1100px;
  --radius: 10px;
  --gutter: 20px;
  --control-size: 40px;
  --button-text: #0a0c0a;
  --eyebrow-text: var(--accent);
}

:root[data-theme='light'] {
  --bg: #f6f7f1;
  --surface: #ffffff;
  --muted-surface: #eaede3;
  --text: #0b0f0b;
  --muted: #545f4e;
  --accent: #157a40;
  --accent-strong: #0e5c30;
  --border: rgba(11, 15, 11, 0.12);
  --shadow: 0 18px 50px rgba(11, 15, 11, 0.1);
  --button-text: #ffffff;
  --eyebrow-text: var(--accent-strong);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-primary);
  background: linear-gradient(180deg, rgba(63, 203, 119, 0.06), transparent 12%),
    var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
}

:root[data-theme='light'] body {
  background: linear-gradient(180deg, rgba(21, 122, 64, 0.05), transparent 12%), var(--bg);
}

h1,
h2,
h3,
.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
}

body[data-reduced-motion='true'] *,
body[data-reduced-motion='true'] *::before,
body[data-reduced-motion='true'] *::after {
  animation-duration: 0.001ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.001ms !important;
}

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

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.container {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.site-header {
  --header-height: 72px;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(10, 12, 10, 0.85);
  border-bottom: 1px solid var(--border);
}

:root[data-theme='light'] .site-header {
  background: rgba(255, 255, 255, 0.92);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 12px;
  padding: 10px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--control-size);
  height: var(--control-size);
  padding: 0;
  border-radius: 8px;
}

.brand img {
  width: 28px;
  height: 28px;
}

.nav-links {
  display: flex;
  gap: 14px;
  align-items: center;
}

.nav-links a {
  padding: 10px 12px;
  border-radius: 6px;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: color 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: var(--muted-surface);
}

.controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--control-size);
  height: var(--control-size);
  padding: 0;
  border: 1px solid var(--border);
  background: var(--muted-surface);
  color: var(--text);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.theme-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--control-size);
  height: var(--control-size);
  padding: 0;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

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

.theme-icon {
  width: 16px;
  height: 16px;
}

.theme-icon.icon-sun {
  display: none;
}

:root[data-theme='light'] .theme-icon.icon-sun {
  display: inline-flex;
}

:root[data-theme='light'] .theme-icon.icon-moon {
  display: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: var(--control-size);
  height: var(--control-size);
  padding: 0;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
}

.hero {
  padding: 120px 0 80px;
}

.grid {
  display: grid;
  gap: 20px;
}

.hero-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  padding: 6px 12px;
  background: var(--muted-surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.85rem;
  letter-spacing: 0.01em;
  color: var(--eyebrow-text);
}

.skip-link {
  position: absolute;
  top: -60px;
  left: 12px;
  z-index: 100;
  padding: 12px 16px;
  background: var(--accent);
  color: var(--button-text);
  border-radius: 6px;
  font-weight: 700;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
}

.hero h1 {
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  margin: 16px 0 12px;
  line-height: 1.15;
}

.lead {
  font-size: 1.1rem;
  color: var(--muted);
  margin-bottom: 26px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--accent);
  color: var(--button-text);
  border-radius: 8px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:not(.secondary)::before {
  content: '>';
  font-family: var(--font-mono);
  opacity: 0.7;
}

.button.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: none;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.section {
  padding: 70px 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 24px;
}

.section-title {
  font-size: 1.6rem;
  margin: 0;
}

.section-subtitle {
  color: var(--muted);
  margin: 0;
}

.muted {
  color: var(--muted);
}

.skill-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.skill-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: var(--muted-surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 500;
}

.skill-badge:not(.icon-badge)::before {
  content: '+';
  color: var(--accent);
  font-weight: 600;
}

.badge-icon {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  fill: var(--accent);
}

.list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: baseline;
  color: var(--muted);
}

.list li::before {
  content: '+';
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
}

.timeline {
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  gap: 8px;
}

.timeline-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--muted-surface);
  color: var(--muted);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.85rem;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.project-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.project-card {
  display: grid;
  gap: 12px;
}

.project-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.link-btn::after {
  content: '↗';
}

.link-btn:hover {
  background: var(--accent);
  color: var(--button-text);
  transform: translateY(-2px);
}

.contact-card {
  display: grid;
  gap: 20px;
  align-items: center;
  grid-template-columns: 1fr;
}

@media (min-width: 700px) {
  .contact-card {
    grid-template-columns: 1fr auto;
  }
}

.footer {
  padding: 30px 0 50px;
  color: var(--muted);
  text-align: center;
}

.meta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
}

.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;
}

@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    inset: var(--header-height) 0 auto;
    background: var(--bg);
    flex-direction: column;
    padding: 18px var(--gutter) 28px;
    border-bottom: 1px solid transparent;
    box-shadow: none;
    transform: translateY(-120%);
    transition: transform 0.25s ease, opacity 0.2s ease, visibility 0.2s ease;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    z-index: 20;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    border-bottom-color: var(--border);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
  }

  .menu-toggle {
    display: inline-flex;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 24px;
  }

  .site-header {
    --header-height: 0px;
    margin-bottom: 10px;
  }

  .navbar {
    gap: 8px;
    padding: 6px 0;
  }

  .hero {
    padding: 64px 0 56px;
  }

  .header-actions {
    margin-left: auto;
    gap: 6px;
  }

  .controls {
    gap: 6px;
  }

  .section {
    padding: 56px 0;
  }
}