:root {
  --ink: #13222a;
  --muted: #4c616a;
  --accent: #075d66;
  --paper: #fff;
  --wash: #f0f5f6;
  --line: #d2e0e3;
  --dark: #101c23;
  --max: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height, 82px) + 20px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
}

a {
  color: var(--accent);
  text-underline-offset: 4px;
}

a:hover {
  color: #033f48;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible {
  outline: 3px solid #dc7200;
  outline-offset: 5px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

h1,
h2,
h3 {
  line-height: 1.12;
  letter-spacing: -0.035em;
  font-weight: 600;
}

h1 {
  font-size: clamp(2.5rem, 5.5vw, 5.2rem);
  margin: 0.4em 0;
  max-width: 950px;
}

h2 {
  font-size: clamp(1.9rem, 3vw, 3rem);
  margin: 0.4em 0 0.7em;
}

h3 {
  font-size: 1.3rem;
  line-height: 1.25;
  margin: 0.2em 0 0.65em;
}

p {
  margin: 0.6em 0 1.2em;
}

ul,
ol {
  padding-left: 1.4em;
}

li {
  margin: 0.4em 0;
}

.wrap {
  max-width: var(--max);
  margin: auto;
  padding-inline: clamp(20px, 4vw, 64px);
}

.skip {
  position: absolute;
  top: -100px;
  z-index: 100;
  background: #fff;
  padding: 12px;
}

.skip:focus {
  top: 10px;
}

.header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  min-height: 82px;
  flex-wrap: wrap;
}

.brand {
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.mark {
  width: 30px;
  height: 34px;
  border: 2px solid var(--accent);
  border-radius: 3px 3px 14px 14px;
  display: grid;
  place-items: center;
  font-size: 12px;
  letter-spacing: 0;
  flex-shrink: 0;
}

.nav {
  display: flex;
  gap: 22px;
  align-items: center;
  flex-wrap: wrap;
}

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

.nav a:hover {
  text-decoration: underline;
}

.language {
  border: 1px solid var(--line);
  padding: 5px 9px;
}

.menu {
  display: none;
  background: #fff;
  border: 1px solid var(--line);
  padding: 8px 12px;
  color: var(--ink);
  font: inherit;
}

.eyebrow {
  font-size: 0.82rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--accent);
}

.hero {
  background: var(--dark);
  color: #fff;
  padding-top: 64px;
  overflow: hidden;
}

.hero .eyebrow {
  color: #85d7df;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 45px;
  align-items: end;
}

.hero .lead {
  color: #d2e1e7;
  max-width: 630px;
  font-size: 1.15rem;
}

.hero h1 {
  font-size: clamp(2.7rem, 5.3vw, 4.8rem);
}

.hero-photo {
  width: 100%;
  height: 410px;
  object-fit: cover;
  object-position: center;
  margin-top: 38px;
}

.hero-side {
  padding-bottom: 24px;
  border-left: 1px solid #45616b;
  padding-left: 28px;
  color: #c9dce3;
}

.hero-side strong {
  display: block;
  color: #fff;
  font-size: 1.2rem;
}

.button {
  display: inline-block;
  padding: 13px 21px;
  text-decoration: none;
  background: var(--accent);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  border: 0;
}

.button:hover {
  background: #03434c;
  color: #fff;
}

.hero .button {
  background: #c0f0f3;
  color: #123039;
}

.hero-meta {
  display: flex;
  gap: 30px;
  padding-block: 18px;
  color: #b5ccd5;
  font-size: 0.85rem;
  flex-wrap: wrap;
}

.toc {
  background: var(--wash);
  border-bottom: 1px solid var(--line);
}

.toc .wrap {
  display: flex;
  gap: 23px;
  padding-block: 17px;
  overflow: auto;
  white-space: nowrap;
}

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

.section {
  padding-block: 75px;
  border-bottom: 1px solid var(--line);
}

.section:nth-of-type(even) {
  background: var(--wash);
}

.section-grid {
  display: grid;
  grid-template-columns: 1fr 1.8fr;
  gap: 60px;
}

.section-heading p {
  color: var(--muted);
}

.prose {
  max-width: 780px;
}

.prose p {
  max-width: 75ch;
}

.lead {
  font-size: 1.13rem;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  padding: 27px;
  min-width: 0;
}

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

.card a {
  display: inline-block;
  margin-top: 16px;
}

.number {
  font-size: 0.83rem;
  color: var(--accent);
  letter-spacing: 0.09em;
  display: block;
  margin-bottom: 17px;
}

.callout {
  padding: 22px 26px;
  background: #e2eef0;
  border-left: 3px solid var(--accent);
  margin: 24px 0;
}

.callout p:last-child {
  margin-bottom: 0;
}

.layers {
  margin: 28px 0;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
}

.layer {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 20px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.layer:last-child {
  border: 0;
}

.layer:first-child {
  background: #d6eef0;
}

.layer:nth-child(2) {
  background: #eef5f6;
}

.layer:nth-child(3) {
  background: #f8fafb;
}

.layer small {
  font-size: 0.9rem;
  color: var(--muted);
}

figcaption {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 12px;
}

.table-wrap {
  overflow: auto;
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 550px;
  font-size: 0.95rem;
}

caption {
  text-align: left;
  color: var(--muted);
  padding-bottom: 15px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  padding: 15px;
}

th {
  background: #e0ecef;
  font-weight: 600;
}

details {
  border-top: 1px solid var(--line);
  padding: 18px 0;
}

details:last-child {
  border-bottom: 1px solid var(--line);
}

summary {
  font-size: 1.12rem;
  font-weight: 600;
  cursor: pointer;
  line-height: 1.45;
}

details p {
  padding-top: 10px;
  color: var(--muted);
}

.source-note {
  font-size: 0.9rem;
  color: var(--muted);
}

.source-note a {
  color: var(--accent);
}

.footer {
  background: var(--dark);
  color: #bfd2db;
  padding: 45px 0;
}

.footer a {
  color: #bfd2db;
}

.footer .brand {
  color: #fff;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer p {
  font-size: 0.87rem;
  max-width: 820px;
}

.page-head {
  padding-block: 62px 40px;
  background: var(--wash);
  border-bottom: 1px solid var(--line);
}

.page-head .lead {
  max-width: 850px;
}

.breadcrumb {
  font-size: 0.88rem;
  margin-bottom: 22px;
}

.article-layout {
  display: grid;
  grid-template-columns: 230px 1fr;
  gap: 55px;
  padding-block: 50px 80px;
}

.article-toc {
  align-self: start;
  position: sticky;
  top: 112px;
  border-left: 2px solid var(--line);
  padding-left: 18px;
}

.article-toc a {
  display: block;
  font-size: 0.9rem;
  margin: 10px 0;
  text-decoration: none;
}

.article section {
  padding-top: 14px;
  margin-bottom: 40px;
  scroll-margin-top: 105px;
}

.article h2 {
  font-size: 2rem;
}

.article h3 {
  margin-top: 25px;
}

.index-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.index-grid .card {
  display: flex;
  flex-direction: column;
}

.index-grid .card a {
  margin-top: auto;
  padding-top: 20px;
}

.tag {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.related {
  border-top: 1px solid var(--line);
  padding-top: 30px;
}

.term-index {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px 35px;
}

.term-index a {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.letter-nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding: 20px 0;
}

.letter-nav a {
  border: 1px solid var(--line);
  padding: 5px 10px;
  text-decoration: none;
}

.legal-warning {
  background: #fff0dc;
  border-left: 4px solid #a45b00;
  padding: 24px;
  margin: 20px 0;
  color: #653900;
}

.cover-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.cover-list div {
  padding: 18px;
  border: 1px solid var(--line);
  background: #fff;
}

.cover-list p {
  margin: 6px 0 0;
}

.fine {
  font-size: 0.86rem;
  color: var(--muted);
}

/* Privacy Policy */

.privacy-section h2 {
  font-size: clamp(1.6rem, 2.4vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 2.2rem 0 1rem;
}

@media (max-width: 900px) {
  .hero-grid,
  .section-grid {
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .hero-side {
    display: none;
  }

  .cards {
    grid-template-columns: 1fr 1fr;
  }

  .article-layout {
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .article-toc {
    position: static;
  }

  .article-toc a {
    display: inline-block;
    margin-right: 16px;
  }

  .nav {
    gap: 14px;
  }

  .hero-photo {
    height: 330px;
  }

  .section {
    padding-block: 50px;
  }
}

@media (max-width: 650px) {
  .header .wrap {
    min-height: 70px;
    flex-wrap: wrap;
    gap: 0;
  }

  .brand {
    font-size: 0.93rem;
    max-width: 240px;
  }

  .menu {
    display: block;
  }

  .nav {
    display: flex;
    width: 100%;
    flex-wrap: wrap;
    gap: 8px 20px;
    padding: 14px 0;
  }

  .js .nav {
    display: none;
  }

  .js .nav.open {
    display: flex;
  }

  .hero {
    padding-top: 36px;
  }

  .hero-photo {
    height: 240px;
    margin-top: 28px;
  }

  .hero h1 {
    font-size: 2.6rem;
  }

  .cards,
  .index-grid,
  .cover-list,
  .term-index {
    grid-template-columns: 1fr;
  }

  .section {
    padding-block: 40px;
  }

  .layer {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .hero-meta {
    gap: 10px 20px;
  }

  .card {
    padding: 23px;
  }

  .page-head {
    padding-block: 40px 25px;
  }

  .article-layout {
    padding-block: 30px 50px;
  }

  .footer-top {
    display: block;
  }

  .footer-links {
    margin-top: 22px;
  }

  .toc .wrap {
    gap: 18px;
  }

  h1 {
    overflow-wrap: anywhere;
  }

  .article h2 {
    font-size: 1.7rem;
  }

  .privacy-section h2 {
    font-size: 1.55rem;
    margin-top: 1.8rem;
  }
}

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

  *,
  *:before,
  *:after {
    animation: none !important;
    transition: none !important;
  }
}

@media print {
  .header,
  .toc,
  .article-toc,
  .footer,
  .button,
  .menu {
    display: none;
  }

  .hero,
  .section,
  .page-head {
    background: #fff;
    color: #000;
  }

  .hero-photo {
    height: 200px;
  }

  .article-layout,
  .section-grid {
    display: block;
  }

  .section {
    padding-block: 25px;
  }

  .hero .lead {
    color: #000;
  }

  details {
    display: block;
  }

  details::details-content {
    display: block;
  }

  a {
    color: #000;
  }
}

/* Information pages: Contact, Privacy, Editorial */
.info-page .page-head h1 {
  font-size: clamp(2.7rem, 4.8vw, 4.4rem);
}

.info-page .prose h2 {
  font-size: clamp(1.45rem, 2vw, 1.9rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 2rem 0 0.85rem;
}

.info-page .prose h2:first-child {
  margin-top: 0;
}

.info-page .prose {
  font-size: 1rem;
}

.info-page .prose p {
  line-height: 1.65;
}

/* Server-side IT-Recht legal notice */
.legal-remote {
  margin: 1.5rem 0 2rem;
}

.legal-remote h1,
.legal-remote h2 {
  font-size: clamp(1.35rem, 2vw, 1.8rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 1.8rem 0 .75rem;
}

.legal-remote h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 .65rem;
}

.legal-remote p,
.legal-remote li {
  max-width: 75ch;
}

.legal-remote img {
  max-width: 220px;
  height: auto;
}