/* ---------------------------------------------------
   Tokens
--------------------------------------------------- */
:root {
  --bg: #080D18;
  --surface: #0E1626;
  --border: #24324A;

  --text: #E8EAF0;
  --text-muted: #98A4B8;

  --primary: #B8FF3D;   /* acid green — the one bold accent */
  --secondary: #B65CFF; /* electric violet — courses & labs marker */
  --tertiary: #FF4F91;  /* hot coral — writing marker */
  --accent: #3DE8FF;    /* electric cyan — projects marker */

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Work Sans", system-ui, sans-serif;

  --measure: 65ch;
  --radius: 6px;
}

/* ---------------------------------------------------
   Reset & base
--------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  margin: 0 0 0.5em;
}

p { margin: 0 0 1em; }

a {
  color: var(--text);
  text-decoration-color: var(--border);
  text-underline-offset: 3px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

a:hover {
  color: var(--primary);
  text-decoration-color: var(--primary);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 2px;
}

ul { list-style: none; margin: 0; padding: 0; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--primary);
  color: var(--bg);
  padding: 0.5em 1em;
  z-index: 100;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* ---------------------------------------------------
   Signature spectrum bar
--------------------------------------------------- */
.spectrum-bar {
  height: 4px;
  width: 100%;
  background: linear-gradient(
    90deg,
    var(--primary),
    var(--accent),
    var(--secondary),
    var(--tertiary)
  );
}

/* ---------------------------------------------------
   Top bar
--------------------------------------------------- */
.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem clamp(1.25rem, 5vw, 3rem);
  border-bottom: 1px solid var(--border);
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.topnav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.topnav a {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.topnav a:hover { color: var(--primary); }
.topnav a[aria-current="page"] { color: var(--text); }

/* In-page jump links (full list page) */
.subnav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin-top: 1.5rem;
}

.subnav a {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.subnav a:hover { color: var(--primary); }

/* ---------------------------------------------------
   Layout shell
--------------------------------------------------- */
main {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 3rem);
}

/* ---------------------------------------------------
   Hero
--------------------------------------------------- */
.hero {
  padding: clamp(3rem, 10vw, 6rem) 0 clamp(2.5rem, 6vw, 4rem);
  max-width: var(--measure);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  color: var(--text);
}

.hero .role {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--primary);
  margin-bottom: 1.25rem;
}

.hero .bio {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 52ch;
}

/* ---------------------------------------------------
   Content blocks
--------------------------------------------------- */
.block {
  padding: clamp(2rem, 5vw, 3rem) 0;
  border-top: 1px solid var(--border);
}

.kicker {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  padding-left: 0.9rem;
  border-left: 3px solid var(--marker, var(--primary));
}

.block--paths { --marker: var(--primary); }
.block--projects { --marker: var(--accent); }
.block--courses  { --marker: var(--secondary); }
.block--writing  { --marker: var(--tertiary); }

.entry-list {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.entry-list--tight { gap: 0.6rem; }

.entry-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.15rem;
}

.entry h3 {
  font-size: 1.15rem;
}

.entry p {
  color: var(--text-muted);
  margin-bottom: 0;
}

.entry-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Featured card inside Courses & labs */
.featured {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.featured h3 { font-size: 1.2rem; margin-bottom: 0.4rem; }
.featured p { color: var(--text-muted); margin-bottom: 0; }

.block-note {
  color: var(--secondary);
  padding-top: 10px;
}

.writing-group {
  margin-bottom: 1.75rem;
}

.writing-group:last-child { margin-bottom: 0; }

.writing-group h3 {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

/* ---------------------------------------------------
   Footer
--------------------------------------------------- */
.footer {
  border-top: 1px solid var(--border);
  padding: clamp(2rem, 5vw, 3rem) clamp(1.25rem, 5vw, 3rem) 3rem;
  text-align: left;
}

.footer > p {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.contact-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.contact-links a {
  color: var(--text-muted);
}
.contact-links a:hover { color: var(--primary); }

/* ---------------------------------------------------
   Motion & accessibility
--------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  a, button { transition: none; }
}

/* ---------------------------------------------------
   Small screens
--------------------------------------------------- */
@media (max-width: 480px) {
  .topbar { padding: 1.25rem 1.25rem; }
  .topnav { gap: 1rem; }
}