:root {
  --bg: #0a0a0a;
  --ink: #f4f4f0;
  --mute: rgba(244,244,240,0.55);
  --soft: rgba(244,244,240,0.78);
  --rule: rgba(244,244,240,0.18);
  --panel: rgba(244,244,240,0.04);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; }

/* TOP BAR */
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 40px;
  border-bottom: 1px solid var(--rule);
  position: sticky; top: 0; background: var(--bg); z-index: 10;
  font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em;
}
.topbar a { text-decoration: none; }
.topbar a:hover { color: var(--mute); }
.topbar .brand { font-weight: 700; letter-spacing: -0.02em; font-size: 18px; text-transform: none; }

/* ARTICLE */
.article {
  max-width: 760px;
  padding: 80px 40px 40px;
  margin: 0 auto;
}
.eyebrow {
  font-size: 12px; color: var(--mute);
  text-transform: uppercase; letter-spacing: 0.12em;
  margin-bottom: 32px;
}
.article h1 {
  font-weight: 700;
  font-size: clamp(40px, 7vw, 84px);
  line-height: 1.0; letter-spacing: -0.04em;
  margin: 0 0 56px;
}
.article h2 {
  font-weight: 700;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.15; letter-spacing: -0.02em;
  margin: 64px 0 16px;
}
.article h3 {
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.01em;
  margin: 40px 0 12px;
}
.article p { margin: 0 0 20px; color: var(--ink); }
.article p + p { margin-top: 0; }
.article strong { font-weight: 700; }
.article em { font-style: italic; }
.article ul, .article ol {
  margin: 0 0 24px;
  padding-left: 24px;
}
.article li { margin-bottom: 8px; }
.article hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 64px 0;
}
.article .lead {
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 48px;
  letter-spacing: -0.01em;
}
.article .callout {
  border: 1px solid var(--rule);
  padding: 24px 28px;
  margin: 32px 0;
  background: var(--panel);
}
.article .callout .label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--mute);
  margin-bottom: 8px;
}

/* OVERVIEW */
.hero {
  padding: 80px 40px 40px;
  border-bottom: 1px solid var(--rule);
}
.hero .kicker {
  font-size: 12px; color: var(--mute);
  text-transform: uppercase; letter-spacing: 0.12em;
  margin-bottom: 24px;
}
.hero h1 {
  font-weight: 700;
  font-size: clamp(56px, 11vw, 160px);
  line-height: 0.9; letter-spacing: -0.04em;
  margin: 0 0 32px;
}
.hero p {
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.45;
  max-width: 720px;
  color: var(--soft);
  margin: 0;
}

.section { padding: 80px 40px; border-bottom: 1px solid var(--rule); }
.section:last-of-type { border-bottom: none; }
.section-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 48px; padding-bottom: 16px;
  border-bottom: 1px solid var(--ink);
  gap: 24px; flex-wrap: wrap;
}
.section-head h2 {
  font-weight: 700;
  font-size: clamp(28px, 4vw, 48px);
  letter-spacing: -0.03em;
  margin: 0;
}
.section-head .meta {
  font-size: 12px; color: var(--mute);
  text-transform: uppercase; letter-spacing: 0.12em;
}

.card-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px;
  background: var(--rule); border: 1px solid var(--rule);
}
.card {
  background: var(--bg);
  padding: 32px;
  text-decoration: none; color: inherit;
  display: flex; flex-direction: column; gap: 16px;
  transition: background 0.15s;
}
.card:hover { background: var(--panel); }
.card .card-meta {
  display: flex; justify-content: space-between;
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--mute);
}
.card h3 {
  font-weight: 700;
  font-size: clamp(22px, 2.4vw, 32px);
  letter-spacing: -0.02em; line-height: 1.05;
  margin: 0;
}
.card p {
  font-size: 15px; line-height: 1.5;
  color: var(--soft);
  margin: 0;
}
.card .arrow { font-size: 20px; align-self: flex-end; margin-top: auto; }

/* RELATED + FOOTER */
.article-end {
  max-width: 760px; margin: 0 auto;
  padding: 0 40px 80px;
}
.related {
  border-top: 1px solid var(--ink);
  padding-top: 32px;
  margin-top: 64px;
}
.related .label {
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--mute);
  margin-bottom: 24px;
}
.related a {
  display: block;
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding: 20px 0;
  transition: background 0.15s;
}
.related a:hover { color: var(--mute); }
.related a .t {
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.01em;
}
.related a .p {
  font-size: 14px;
  color: var(--soft);
  margin-top: 4px;
}

footer.site {
  padding: 24px 40px;
  border-top: 1px solid var(--rule);
  display: flex; justify-content: space-between; gap: 24px;
  font-size: 12px; color: var(--mute);
  text-transform: uppercase; letter-spacing: 0.08em;
  flex-wrap: wrap;
}
footer.site a { text-decoration: none; }
footer.site a:hover { color: var(--ink); }

/* GLOSSAR */
.glossar dl { margin: 0; }
.glossar dt {
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.01em;
  margin-top: 32px;
  margin-bottom: 6px;
}
.glossar dd {
  margin: 0 0 20px;
  font-size: 16px;
  color: var(--soft);
  line-height: 1.5;
}

/* HAMBURGER + SHEET */
.hamb {
  appearance: none; -webkit-appearance: none;
  background: transparent; border: 0; padding: 8px;
  cursor: pointer; color: inherit;
  display: flex; flex-direction: column; gap: 5px;
  width: 36px; height: 32px; justify-content: center;
}
.hamb span {
  display: block; width: 20px; height: 2px;
  background: var(--ink);
}
.hamb:hover span { background: var(--mute); }

.navsheet {
  position: fixed; inset: 0;
  background: var(--bg);
  z-index: 100;
  padding: 40px;
  overflow-y: auto;
  display: flex; flex-direction: column;
  opacity: 0; transition: opacity 0.2s ease;
}
.navsheet[hidden] { display: none; }
.navsheet.navsheet-open { opacity: 1; }
.navclose {
  position: absolute; top: 24px; right: 32px;
  appearance: none; -webkit-appearance: none;
  background: transparent; border: 0;
  color: var(--ink); cursor: pointer;
  font-size: 40px; line-height: 1;
  font-family: inherit; padding: 4px 12px;
}
.navclose:hover { color: var(--mute); }
.navlist {
  margin: 80px 0 40px;
  display: flex; flex-direction: column;
  max-width: 760px;
}
.navlink {
  display: block;
  text-decoration: none;
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
  font-size: clamp(22px, 3.2vw, 36px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--ink);
}
.navlink:hover { color: var(--mute); }
.navlink-strong { font-weight: 700; }
.navlink-active { color: var(--mute); }
.navlink-active::before {
  content: '· ';
}
.navgroup {
  margin-top: 32px;
  padding: 8px 0;
  font-size: 11px;
  color: var(--mute);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  border-bottom: 1px solid var(--ink);
}
.navmail {
  margin-top: auto;
  padding-top: 24px;
  font-size: 14px;
  color: var(--mute);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.navmail:hover { color: var(--ink); }

/* RESPONSIVE */
@media (max-width: 700px) {
  .topbar { padding: 16px 20px; }
  .article, .article-end { padding-left: 20px; padding-right: 20px; }
  .article { padding-top: 48px; }
  .hero { padding: 48px 20px 32px; }
  .section { padding: 48px 20px; }
  .card-grid { grid-template-columns: 1fr; }
  footer.site { padding: 20px; }
  .navsheet { padding: 24px 20px; }
  .navclose { top: 16px; right: 16px; }
  .navlist { margin-top: 64px; }
}