:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --ink: #12151b;
  --muted: #5b6472;
  --accent: #2b5fd9;
  --line: #e5e8ee;
  --content-max: 700px;
  --topbar-max: 860px;
}

:root[data-theme="dark"] {
  --bg: #0b0e14;
  --bg-soft: #11151d;
  --ink: #e7e9ee;
  --muted: #8b93a3;
  --accent: #6d8dfa;
  --line: #22262f;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0e14;
    --bg-soft: #11151d;
    --ink: #e7e9ee;
    --muted: #8b93a3;
    --accent: #6d8dfa;
    --line: #22262f;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

/* Top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  max-width: var(--topbar-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 24px;
}

.topbar-name {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.topnav a {
  color: var(--muted);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 6px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.topnav a:hover { color: var(--ink); background: var(--bg-soft); }
.topnav a.active { color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }

.theme-toggle {
  background: none;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  flex-shrink: 0;
}

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

/* Content */
.content {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero { padding: 64px 0 48px; }

.hero h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 8px;
}

.hero-role {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  color: var(--accent);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 6px;
}

.hero-meta {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0 0 22px;
}

.hero-links {
  display: flex;
  gap: 18px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.82rem;
}

.hero-links a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  padding-bottom: 1px;
}

.hero-links a:hover { color: var(--accent); border-color: var(--accent); }

.section {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.section:last-of-type { border-bottom: none; }

.section-label {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin: 0 0 24px;
  font-weight: 500;
}

.body-text {
  color: var(--ink);
  font-size: 1rem;
}

.section-intro {
  margin: -12px 0 28px;
  color: var(--muted);
  font-size: 0.95rem;
}

.body-text strong { font-weight: 600; }

.stat-row {
  margin: 32px 0 0;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat dt {
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.stat dd {
  margin: 4px 0 0;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.4;
}

/* Entries (experience / education / projects) */
.entry {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 0 20px;
}

.entry + .entry {
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.entry-compact + .entry-compact {
  margin-top: 20px;
  padding-top: 20px;
}

.entry-date {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.76rem;
  color: var(--muted);
  padding-top: 3px;
}

.entry-date a { color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--line); }
.entry-date a:hover { color: var(--accent); border-color: var(--accent); }

.entry-body h4 {
  font-weight: 600;
  font-size: 1.05rem;
  margin: 0 0 4px;
  letter-spacing: -0.005em;
}

.entry-org {
  font-weight: 400;
  color: var(--muted);
}

.entry-sub {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.9rem;
}

.entry-body ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.entry-body li + li { margin-top: 5px; }

/* Skills */
.skill-list {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 36px;
}

.skill-row dt {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.76rem;
  color: var(--accent);
  margin-bottom: 4px;
}

.skill-row dd {
  margin: 0;
  color: var(--ink);
  font-size: 0.93rem;
}

/* Contact */
.contact-link {
  display: inline-block;
  margin-top: 6px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.98rem;
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
}

/* Footer */
.footer {
  padding: 24px 0 56px;
  border-bottom: none;
}

.footer p {
  margin: 0;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.76rem;
  color: var(--muted);
}

/* Scroll reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Responsive */
@media (max-width: 640px) {
  .topbar-inner { padding: 12px 20px; gap: 12px; }
  .topbar-name { display: none; }
  .topnav { font-size: 0.68rem; }
  .topnav a { padding: 5px 7px; }
  .content { padding: 0 20px; }
  .hero { padding: 40px 0 36px; }
  .hero h1 { font-size: 1.6rem; }
}

@media (max-width: 560px) {
  .skill-list {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .entry {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .stat-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px 16px;
  }
  .section { padding: 36px 0; }
}