/* ── Design tokens ─────────────────────────────────────── */
/* Base surface tokens are shared with avendano.xyz (paper/ink/graphite/rule)
   so the two sites read as one family; the accent voice here stays Cushman
   blue where the personal site uses signal red. */
:root {
  --paper:      #F7F7F4;
  --paper-deep: #EFEFEA;
  --ink:        #141412;
  --ink-soft:   #6E6E68;  /* graphite on avendano.xyz */
  --blue:       #0E406A;
  --navy:       #005487;
  --bright:     #0071CE;
  --light-blue: #7BADD3;
  --pale-blue:  #BDD4E7;
  --line:       #E3E3DE;  /* rule on avendano.xyz */
  --white:      #FFFFFF;
  --display: 'Familjen Grotesk', sans-serif;
  --sans: 'Atkinson Hyperlegible Next', -apple-system, sans-serif;
  --mono: 'Fragment Mono', ui-monospace, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: 16px;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--blue);
}

a { color: var(--bright); text-decoration: none; }
a:hover { text-decoration: underline; }

.label {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ── Navigation ────────────────────────────────────────── */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--blue);
  z-index: 200;
  padding: 0 2.5rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-name {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--white);
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a,
.nav-back {
  color: var(--pale-blue);
  font-size: 0.8rem;
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links a:hover, .nav-back:hover { color: var(--white); text-decoration: none; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
}

/* ── Hero ──────────────────────────────────────────────── */
.hero {
  position: relative;
  background: var(--blue);
  padding: 7.5rem 2.5rem 4.5rem;
  text-align: center;
  color: var(--white);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E");
  opacity: 0.14;
  pointer-events: none;
}

.hero > * { position: relative; }

.hero-label {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pale-blue);
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.hero-title {
  font-family: var(--display);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--light-blue);
  margin-bottom: 0.4rem;
}

.hero-school {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--pale-blue);
}

.hero-divider { width: 48px; height: 3px; background: var(--bright); margin: 1.75rem auto; }

.hero-tagline {
  max-width: 560px;
  margin: 0 auto;
  color: var(--pale-blue);
  font-size: 1rem;
  line-height: 1.7;
}

/* ── Shared section layout ─────────────────────────────── */
.section-inner { max-width: 1080px; margin: 0 auto; padding: 4.5rem 2.5rem; }

.section-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bright);
  margin-bottom: 0.6rem;
}

.section-heading { font-size: 2rem; margin-bottom: 2.25rem; }
.section-divider { width: 40px; height: 3px; background: var(--light-blue); margin-bottom: 2.25rem; }

/* ── About ─────────────────────────────────────────────── */
#about { background: var(--paper); }

.about-grid { display: grid; grid-template-columns: 260px 1fr; gap: 4rem; align-items: start; }

.about-photo {
  width: 260px;
  height: 300px;
  object-fit: cover;
  object-position: top center;
  border-top: 4px solid var(--blue);
  display: block;
}

.about-text p { color: var(--ink-soft); margin-bottom: 1.25rem; }
.about-text p:last-child { margin-bottom: 0; }
.about-text strong { color: var(--ink); }

.about-links { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1.75rem; }

.pill {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.45rem 1rem;
  border: 1.5px solid var(--blue);
  color: var(--blue);
  border-radius: 3px;
  transition: all 0.15s;
}

.pill:hover { background: var(--blue); color: var(--white); text-decoration: none; }

/* ── Courses ───────────────────────────────────────────── */
#courses { background: var(--paper-deep); }

.course-subsection { margin-bottom: 3.5rem; }
.course-subsection:last-child { margin-bottom: 0; }

.course-subsection-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.25rem;
}

.course-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
  border-radius: 6px;
  padding: 1.5rem 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.15s, transform 0.15s;
}

.course-card:hover { box-shadow: 0 6px 24px rgba(14, 64, 106, 0.12); transform: translateY(-2px); }
.course-card.cotaught { border-top-color: var(--bright); }
.course-card.prev { border-top-color: var(--light-blue); }
.course-card.prev h3 { color: var(--navy); opacity: 0.85; }

.course-tag {
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.6rem;
}

.course-card h3 { font-size: 1.15rem; margin-bottom: 0.6rem; line-height: 1.3; }
.course-card p { font-size: 0.88rem; color: var(--ink-soft); flex: 1; margin-bottom: 1.25rem; }

.card-actions { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }

.course-link {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--bright);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.course-link::after { content: '→'; }
.course-link:hover { text-decoration: none; color: var(--navy); }

.qlass-btn {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.4rem 0.9rem;
  background: var(--blue);
  color: var(--white);
  border-radius: 3px;
  transition: background 0.15s;
}

.qlass-btn:hover { background: var(--navy); color: var(--white); text-decoration: none; }

/* ── Background (blue band) ────────────────────────────── */
#background { background: var(--blue); color: var(--white); }
#background .section-heading { color: var(--white); }
#background .section-label { color: var(--pale-blue); }
#background .section-divider { background: var(--light-blue); }

.background-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }

.bg-block h3 { font-size: 1.2rem; color: var(--pale-blue); margin-bottom: 0.75rem; }
.bg-block p { font-size: 0.95rem; color: rgba(255, 255, 255, 0.82); line-height: 1.7; }
.bg-block p + p { margin-top: 1rem; }
.bg-block strong { color: var(--white); }

/* ── Talks ─────────────────────────────────────────────── */
#talks { background: var(--paper); }

.talk-list { display: flex; flex-direction: column; gap: 1.5rem; }

.talk-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 1.5rem;
  align-items: start;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.talk-item:last-child { border-bottom: none; }

.talk-year {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--light-blue);
  line-height: 1;
  padding-top: 0.2rem;
}

.talk-content h3 { font-size: 1.1rem; margin-bottom: 0.3rem; }
.talk-content .talk-venue { font-size: 0.85rem; color: var(--ink-soft); margin-bottom: 0.5rem; }
.talk-content p { font-size: 0.9rem; color: var(--ink-soft); }

/* ── Projects ──────────────────────────────────────────── */
#projects { background: var(--paper-deep); }

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.project-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--bright);
  border-radius: 6px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.15s;
}

.project-card:hover { box-shadow: 0 6px 24px rgba(14, 64, 106, 0.1); }
.project-card h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.project-card p { font-size: 0.85rem; color: var(--ink-soft); flex: 1; margin-bottom: 1rem; }

/* ── Footer ────────────────────────────────────────────── */
footer {
  background: var(--blue);
  color: var(--pale-blue);
  text-align: center;
  padding: 2.5rem;
  font-size: 0.82rem;
}

footer a { color: var(--light-blue); }

/* ── Course pages ──────────────────────────────────────── */
body.course-page { background: var(--paper); }

.course-header {
  background: var(--blue);
  color: var(--white);
  margin-top: 60px;
  position: relative;
  overflow: hidden;
}

.course-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E");
  opacity: 0.14;
  pointer-events: none;
}

.course-header .section-inner { position: relative; padding: 2.75rem 2.5rem; max-width: 800px; }

.course-header .course-tag { color: var(--pale-blue); margin-bottom: 0.4rem; }
.course-header h1 { color: var(--white); font-size: 2.1rem; margin-bottom: 0.75rem; }
.course-actions { min-height: 0; }
.course-actions .qlass-btn { background: var(--bright); }
.course-actions .qlass-btn:hover { background: var(--white); color: var(--blue); }

body.course-page main { max-width: 800px; margin: 0 auto; padding: 2.5rem 2.5rem 4rem; }

body.course-page main > h1:first-of-type { display: none; }

body.course-page main h1 { font-size: 2rem; margin-bottom: 0.75rem; padding-bottom: 0.75rem; border-bottom: 3px solid var(--blue); }
body.course-page main h2 { font-size: 1.35rem; margin-top: 2.5rem; margin-bottom: 0.75rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--line); }
body.course-page main h3 { font-size: 1.1rem; color: var(--navy); margin-top: 1.5rem; margin-bottom: 0.5rem; }
body.course-page main p { margin-bottom: 1rem; color: var(--ink-soft); }
body.course-page main ul, body.course-page main ol { padding-left: 1.5rem; margin-bottom: 1rem; }
body.course-page main li { margin-bottom: 0.3rem; }
body.course-page main strong { color: var(--ink); }
body.course-page main blockquote { border-left: 3px solid var(--light-blue); padding-left: 1rem; color: var(--ink-soft); margin: 1rem 0; }
body.course-page main code { font-family: var(--mono); background: var(--paper-deep); padding: 0.15em 0.4em; border-radius: 3px; font-size: 0.9em; }
body.course-page main td code { background: none; padding: 0; font-size: 0.82em; white-space: nowrap; }
body.course-page main pre { background: var(--paper-deep); padding: 1rem; overflow-x: auto; margin-bottom: 1rem; border-left: 3px solid var(--light-blue); }
body.course-page main pre code { background: none; padding: 0; }
body.course-page main table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; font-size: 0.9rem; }
body.course-page main th { background: var(--blue); color: var(--white); font-family: var(--sans); font-size: 0.85rem; padding: 0.6rem 0.75rem; text-align: left; }
body.course-page main td { padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--line); }
body.course-page main tr:nth-child(even) td { background: var(--paper-deep); }
body.course-page main hr { border: none; border-top: 1px solid var(--line); margin: 2rem 0; }

#loading { color: var(--ink-soft); font-style: italic; }

/* ── Qlass feed panel ──────────────────────────────────── */
.qlass-feed {
  max-width: 800px;
  margin: 2.5rem auto 0;
  padding: 1.5rem 1.75rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--bright);
  border-radius: 6px;
}

.qlass-feed-title {
  font-size: 1.05rem;
  margin-bottom: 1rem;
}

.qlass-feed h3 {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 1rem 0 0.4rem;
}

.qlass-feed ul { list-style: none; }
.qlass-feed li { font-size: 0.9rem; padding: 0.3rem 0; border-bottom: 1px solid var(--paper-deep); }
.qlass-feed li:last-child { border-bottom: none; }
.qlass-feed .muted { color: var(--ink-soft); font-size: 0.82rem; }

@media (max-width: 900px) {
  .qlass-feed { margin-left: 2.5rem; margin-right: 2.5rem; }
}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--blue);
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0 1rem;
    box-shadow: 0 8px 16px rgba(14, 64, 106, 0.25);
  }

  .nav-links.open { display: flex; }
  .nav-links li { padding: 0.6rem 2.5rem; }

  .about-grid { grid-template-columns: 1fr; }
  .about-photo { width: 100%; height: 280px; }
  .background-grid { grid-template-columns: 1fr; gap: 2rem; }
  .talk-item { grid-template-columns: 60px 1fr; gap: 1rem; }
  .talk-year { font-size: 1.1rem; }

  body.course-page main { padding: 2rem 1.25rem 3rem; }
  .course-header .section-inner { padding: 2rem 1.25rem; }
  .qlass-feed { margin-left: 1.25rem; margin-right: 1.25rem; }
}