:root[data-theme="dark"] {
  --bg: oklch(19% 0.01 260);
  --nav-bg: oklch(19% 0.01 260 / 0.85);
  --surface: oklch(24% 0.01 260);
  --border: oklch(33% 0.01 260);
  --text-1: oklch(96% 0.01 260);
  --text-2: oklch(90% 0.01 260);
  --text-3: oklch(76% 0.01 260);
  --text-4: oklch(62% 0.01 260);
  --text-5: oklch(50% 0.01 260);
  --accent: oklch(78% 0.16 150);
  --accent-soft: oklch(78% 0.16 150 / 0.12);
  --accent-contrast: oklch(15% 0.01 260);
}

:root[data-theme="light"] {
  --bg: oklch(98% 0.004 260);
  --nav-bg: oklch(98% 0.004 260 / 0.85);
  --surface: oklch(93% 0.006 260);
  --border: oklch(83% 0.008 260);
  --text-1: oklch(18% 0.01 260);
  --text-2: oklch(26% 0.01 260);
  --text-3: oklch(38% 0.01 260);
  --text-4: oklch(50% 0.01 260);
  --text-5: oklch(58% 0.01 260);
  --accent: oklch(48% 0.14 150);
  --accent-soft: oklch(48% 0.14 150 / 0.1);
  --accent-contrast: oklch(99% 0.005 260);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
#about, #skills, #experience, #projects, #contact { scroll-margin-top: calc(var(--nav-height, 84px) - 1px); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-2);
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  transition: background 0.2s ease, color 0.2s ease;
}

::selection { background: var(--accent); color: var(--accent-contrast); }

.mono { font-family: 'JetBrains Mono', monospace; }
.muted { color: var(--text-4); }
.small { font-size: 14px; }

@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
.cursor { animation: blink 1s step-end infinite; }

.section { max-width: 980px; margin: 0 auto; padding: 40px 48px 80px; }
.section.bordered { border-top: 1px solid var(--border); }

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px;
  background: var(--nav-bg);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav-logo { font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 17px; color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 28px; font-family: 'JetBrains Mono', monospace; font-size: 14px; }
.nav-links a { color: var(--text-3); text-decoration: none; }
.theme-toggle {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
}

.hero { padding-top: 100px; display: flex; flex-direction: column; gap: 28px; }
.hero-name { margin: 0; font-family: 'JetBrains Mono', monospace; font-size: 52px; font-weight: 700; color: var(--text-1); letter-spacing: -0.02em; }
.hero-typed { font-size: 20px; color: var(--accent); min-height: 28px; }
.hero-desc { max-width: 640px; color: var(--text-3); font-size: 16px; margin: 0; }
.hero-links { display: flex; flex-wrap: wrap; gap: 14px; font-size: 14px; }
.pill { color: var(--text-2); text-decoration: none; border: 1px solid var(--border); border-radius: 6px; padding: 8px 14px; }
.pill-static { color: var(--text-4); }
.pill-accent { color: var(--accent-contrast); background: var(--accent); font-weight: 600; }

.eyebrow { color: var(--accent); font-size: 14px; margin-bottom: 14px; }
.heading { margin: 0 0 32px; font-family: 'JetBrains Mono', monospace; font-size: 28px; color: var(--text-1); }
.subheading { font-size: 13px; color: var(--text-4); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 16px; }
.body-text { max-width: 760px; color: var(--text-3); font-size: 16px; text-wrap: pretty; }

.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 28px; }
.skill-group-label { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--text-4); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 10px; }
.skill-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--text-2); background: var(--surface); border: 1px solid var(--border); border-radius: 5px; padding: 5px 10px; }

.timeline { position: relative; display: flex; flex-direction: column; }
.timeline-row { display: grid; grid-template-columns: 22px 1fr; gap: 20px; padding-bottom: 36px; position: relative; }
.timeline-dot-wrap { display: flex; justify-content: center; position: relative; }
.timeline-row:not(:last-child) .timeline-dot-wrap::after {
  content: '';
  position: absolute;
  top: 17px;
  bottom: -42px;
  left: 50%;
  width: 1px;
  background: var(--border);
  transform: translateX(-50%);
}
.timeline-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--accent); margin-top: 6px; position: relative; z-index: 1; }
.timeline-row:first-child .timeline-dot { box-shadow: 0 0 0 7px color-mix(in oklch, var(--accent) 25%, transparent); }
.job-title-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; margin-bottom: 4px; }
.job-role { margin: 0; font-family: 'JetBrains Mono', monospace; font-size: 18px; color: var(--text-1); font-weight: 600; }
.job-company { color: var(--text-4); font-size: 14px; }
.job-period { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--text-4); margin-bottom: 12px; }
.job-bullets { margin: 0; padding-left: 20px; color: var(--text-3); font-size: 15px; display: flex; flex-direction: column; gap: 6px; }

.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.project-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 24px; display: flex; flex-direction: column; gap: 12px; }
.project-tag { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--text-4); }
.project-title { margin: 0; font-family: 'JetBrains Mono', monospace; font-size: 17px; color: var(--text-1); }
.project-desc { margin: 0; color: var(--text-3); font-size: 14px; flex: 1; }
.project-stack { display: flex; flex-wrap: wrap; gap: 6px; }
.stack-chip { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--accent); background: var(--accent-soft); border-radius: 4px; padding: 4px 8px; }

.edu-certs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.stack-list { display: flex; flex-direction: column; gap: 20px; }
.stack-item-title { font-family: 'JetBrains Mono', monospace; font-size: 15px; color: var(--text-1); font-weight: 600; }
.stack-item-sub { font-size: 14px; color: var(--text-3); margin-top: 2px; }
.stack-item-meta { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--text-5); margin-top: 2px; }

.contact { padding: 60px 48px; }
.contact-inner { display: flex; flex-direction: column; align-items: center; gap: 20px; text-align: center; }
.footer-note { font-size: 12px; color: var(--text-5); margin-top: 24px; }

.enc-company {
  filter: blur(3px);
  user-select: none;
  color: var(--text-4);
  transition: filter 0.2s ease;
}
.enc-company.revealed { filter: none; user-select: text; color: var(--text-4); }

.key-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: oklch(10% 0.01 260 / 0.6);
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.key-modal-overlay.open { display: flex; }
.key-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  max-width: 360px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.key-modal-title { font-size: 17px; color: var(--text-1); }
.key-modal-sub { margin: 0; font-size: 14px; color: var(--text-3); }
.key-modal-input {
  font-size: 15px;
  color: var(--text-1);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  outline: none;
}
.key-modal-input:focus { border-color: var(--accent); }
.key-modal-input:disabled { opacity: 0.5; cursor: not-allowed; }
.pill:disabled { opacity: 0.4; cursor: not-allowed; }

.page-load-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: color-mix(in oklch, var(--bg) 55%, transparent);
  backdrop-filter: blur(24px) saturate(120%);
  -webkit-backdrop-filter: blur(24px) saturate(120%);
  border: 1px solid color-mix(in oklch, var(--text-1) 8%, transparent);
  pointer-events: none;
  animation: page-load-unblur 3s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
@keyframes page-load-unblur {
  from {
    opacity: 1;
    backdrop-filter: blur(24px) saturate(120%);
    -webkit-backdrop-filter: blur(24px) saturate(120%);
  }
  to {
    opacity: 0;
    backdrop-filter: blur(0px) saturate(100%);
    -webkit-backdrop-filter: blur(0px) saturate(100%);
  }
}
.key-modal-error { font-size: 13px; color: oklch(65% 0.19 25); min-height: 16px; }
.key-modal-actions { display: flex; justify-content: flex-end; gap: 10px; }

@media (max-width: 640px) {
  .nav, .section { padding-left: 24px; padding-right: 24px; }
  .hero-name { font-size: 36px; }
  .edu-certs-grid { grid-template-columns: 1fr; }

  .nav { position: sticky; flex-wrap: wrap; }
  .nav-burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
  }
  .nav-burger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-2);
    border-radius: 2px;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px 16px;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
  }
  .nav-links a:last-of-type { border-bottom: none; }
  .theme-toggle { margin-top: 12px; align-self: flex-start; }
}

@media (min-width: 641px) {
  .nav-burger { display: none; }
}