:root {
  --bg: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --card: #f8fafc;
  --border: #e2e8f0;
  --link: #2563eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f1a;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --card: #0f172a;
    --border: #1f2937;
    --link: #60a5fa;
  }
}

/* Respect manual theme toggle via data attribute */
[data-theme="light"] {
  --bg: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --card: #f8fafc;
  --border: #e2e8f0;
  --link: #2563eb;
}

[data-theme="dark"] {
  --bg: #0b0f1a;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --card: #0f172a;
  --border: #1f2937;
  --link: #60a5fa;
}

* {
  box-sizing: border-box;
}

html, body {
  padding: 0;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto,
    Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(180%) blur(10px);
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 64px;
}

.logo {
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 12px;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 10px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 16px;
  padding: 0;
  margin: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  opacity: 0.9;
}

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

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 10px;
}

.section {
  padding: 56px 0;
}

.section.alt {
  background: var(--card);
}

h1, h2, h3 {
  margin: 0 0 8px 0;
}

 .sub {
  color: var(--muted);
  margin: 0 0 12px 0;
}

.quick-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.meta {
  list-style: none;
  padding: 0;
  margin: 12px 0 0 0;
  color: var(--muted);
}

.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
}

.list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
}

.pubs {
  padding-left: 18px;
}

.pub-title {
  font-weight: 600;
}

.pub-link {
  margin-left: 8px;
  color: var(--link);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
}

/* Horizontal projects row */
.projects-row {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x mandatory;
}

.projects-row .card {
  min-width: 320px;
  scroll-snap-align: start;
}

/* Project pipelines */
.pipelines {
  display: grid;
  gap: 24px;
  margin-top: 12px;
}

.pipeline {
  display: grid;
  grid-template-columns: 1fr 40px 1fr;
  grid-template-rows: auto 24px auto;
  gap: 8px 12px;
  align-items: center;
}

.pipeline .src { grid-column: 1; grid-row: 1; }
.pipeline .arrow-right { grid-column: 2; grid-row: 1; text-align: center; font-size: 24px; color: var(--muted); }
.pipeline .seg { grid-column: 3; grid-row: 1; }
.pipeline .arrow-down { grid-column: 3; grid-row: 2; text-align: center; font-size: 22px; color: var(--muted); }
.pipeline .outputs { grid-column: 3; grid-row: 3; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }

.pipeline .out { display: grid; grid-template-rows: 20px auto; gap: 4px; align-items: start; }
.pipeline .out .arrow { text-align: center; font-size: 18px; color: var(--muted); }
.pipeline img { width: 100%; height: auto; border: 1px solid var(--border); border-radius: 8px; background: var(--card); }

/* Responsive */
@media (max-width: 800px) {
  .grid, .quick-facts {
    grid-template-columns: 1fr;
  }

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

  .nav-links {
    position: absolute;
    right: 16px;
    top: 56px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    flex-direction: column;
    padding: 12px;
    display: none;
  }

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

  /* Stack pipeline on small screens */
  .pipeline { grid-template-columns: 1fr; grid-template-rows: auto 24px auto 24px auto; }
  .pipeline .src { grid-column: 1; grid-row: 1; }
  .pipeline .arrow-right { display: none; }
  .pipeline .seg { grid-column: 1; grid-row: 3; }
  .pipeline .arrow-down { grid-column: 1; grid-row: 2; }
  .pipeline .outputs { grid-column: 1; grid-row: 5; grid-template-columns: repeat(2, 1fr); }
}