/* Sebastian Kutschbach — personal site */

:root {
  --ink: #203047;
  --muted: #5C6B78;
  --heading: #123E52;
  --accent: #176B73;
  --line: #DCE5E9;
  --paper: #FFFFFF;
  --canvas: #F7F9FA;
  --amber: #8A5A00;
  --amber-bg: #FFF6E5;
  --max: 72rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Noto Sans, Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { color: var(--heading); line-height: 1.15; letter-spacing: -0.02em; }

p { margin: 0 0 1rem; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--heading); }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--heading);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 10;
}
.skip-link:focus { left: 1rem; top: 1rem; }

.site-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.4rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--heading);
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.02em;
}

nav { display: flex; align-items: center; gap: 1.35rem; flex-wrap: wrap; }

nav a {
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
}

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

nav .nav-cv {
  color: var(--paper);
  background: var(--heading);
  padding: 0.35rem 0.8rem;
  border-radius: 5px;
}

nav .nav-cv:hover { color: var(--paper); background: var(--accent); }

main { max-width: var(--max); margin: 0 auto; padding: 0 2rem; }

.hero { padding: 6.5rem 0 4.5rem; max-width: 54rem; }

.eyebrow {
  margin: 0 0 1.1rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 1.5rem;
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  letter-spacing: -0.04em;
  max-width: 18ch;
}

.lede {
  margin: 0 0 2rem;
  max-width: 46rem;
  color: var(--muted);
  font-size: 1.18rem;
  line-height: 1.65;
}

.actions { display: flex; align-items: center; gap: 1.4rem; flex-wrap: wrap; }

.button {
  display: inline-block;
  background: var(--heading);
  color: var(--paper);
  padding: 0.7rem 1.15rem;
  border-radius: 5px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}

.button:hover { background: var(--accent); color: var(--paper); }

.link { font-size: 0.95rem; }

.section { padding: 3.5rem 0; border-top: 1px solid var(--line); }

.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 2rem; margin-bottom: 2rem; }

.section-head p { margin: 0; max-width: 32rem; color: var(--muted); font-size: 0.95rem; }

.section h2 {
  margin: 0 0 1.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-head h2 { margin: 0; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.kicker {
  margin: 0 0 0.7rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.card h3 { margin: 0 0 0.7rem; font-size: 1.22rem; }

.card-text { margin: 0 0 1.3rem; color: var(--muted); font-size: 0.95rem; }

.tags { margin: auto 0 0; color: var(--muted); font-size: 0.8rem; }

.project {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 2.2rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.project-media { display: block; background: #0e1418; }

.project-media img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
}

.project-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem 2rem 2rem 0;
}

.project h3 { margin: 0 0 0.75rem; font-size: 1.45rem; }

.project h3 a { color: var(--heading); text-decoration: none; }

.project h3 a:hover { color: var(--accent); }

.project-text { margin: 0; color: var(--muted); }

.project .tags { margin: 1rem 0 0; }

.text-link { display: inline-block; margin-top: 1.1rem; font-size: 0.92rem; font-weight: 600; text-decoration: none; }

.text-link:hover { text-decoration: underline; }

.case-figure { margin: 2.2rem 0 2.8rem; }

.case-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.case-figure figcaption { margin-top: 0.6rem; color: var(--muted); font-size: 0.82rem; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: #EEF2F5;
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

.lab { display: grid; grid-template-columns: 1.5fr 1fr; gap: 3rem; align-items: start; }

.lab-copy p { max-width: 40rem; }

.lab-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.lab-stats div { background: var(--paper); padding: 1.1rem 1.2rem; }

.lab-stats dt {
  color: var(--heading);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
}

.lab-stats dd { margin: 0.4rem 0 0; color: var(--muted); font-size: 0.8rem; }

.hobby { max-width: 42rem; }

.hobby p { margin-bottom: 1rem; }

.about { display: grid; grid-template-columns: 1.5fr 1fr; gap: 4rem; }

.about p { max-width: 38rem; }

.about h2 { margin-bottom: 1rem; }

.looking {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.5rem;
  align-self: start;
}

.looking ul { margin: 0; padding-left: 1.1rem; }

.looking li { margin-bottom: 0.6rem; color: var(--muted); font-size: 0.94rem; }

.looking li:last-child { margin-bottom: 0; }

.contact { padding-bottom: 5rem; }

.contact p { max-width: 40rem; }

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.6rem 2rem 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer p { margin: 0; }

/* Case study pages */

.case { max-width: 46rem; padding-top: 3.5rem; padding-bottom: 5rem; }

.back { font-size: 0.9rem; text-decoration: none; }

.case h1 { margin: 1.2rem 0 0.8rem; font-size: clamp(2rem, 4.5vw, 3rem); }

.meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 2.5rem; }

.case h2 {
  margin: 2.6rem 0 0.6rem;
  font-size: 1.12rem;
  letter-spacing: -0.01em;
  text-transform: none;
  color: var(--heading);
}

.case p, .case li { color: var(--ink); }

.case ul { padding-left: 1.2rem; }

.case li { margin-bottom: 0.5rem; }

.callout {
  border-left: 3px solid var(--accent);
  padding: 0.2rem 0 0.2rem 1.2rem;
  margin: 1.8rem 0;
  color: var(--muted);
}

.draft-note {
  background: var(--amber-bg);
  border: 1px solid #E8CC96;
  color: var(--amber);
  border-radius: 6px;
  padding: 0.9rem 1.1rem;
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.draft-note strong { color: var(--amber); }

@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .project { grid-template-columns: 1fr; gap: 0; }
  .project-body { padding: 1.5rem; }
  .lab { grid-template-columns: 1fr; gap: 2rem; }
  .lab-stats { max-width: 28rem; }
  .about { grid-template-columns: 1fr; gap: 2.5rem; }
  .section-head { display: block; }
  .section-head p { margin-top: 0.6rem; }
}

@media (max-width: 620px) {
  .site-header { flex-direction: column; align-items: flex-start; gap: 0.9rem; padding: 1.2rem 1.2rem; }
  nav { gap: 0.55rem 0.7rem; }
  nav a { font-size: 0.8rem; }
  nav .nav-cv { padding: 0.3rem 0.6rem; }
  main { padding: 0 1.2rem; }
  .hero { padding: 4rem 0 3rem; }
  .site-footer { padding: 1.4rem 1.2rem 2rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}