:root {
  --ivory: #f6f1e3;
  --ivory-deep: #efe8d5;
  --navy: #1a3a5c;
  --navy-button: #254b68;
  --navy-button-hover: #1f405a;
  --gold: #8f5a00;
  --teal: #0f6e56;
  --teal-muted: #0b5f4c;
  --gray: #656b76;
  --line: rgba(26, 58, 92, 0.22);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--ivory);
  color: var(--navy);
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  line-height: 1.7;
}

h1,
h2,
h3,
.serif {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
}

h2 {
  font-size: clamp(1.55rem, 3.4vw, 2.15rem);
  line-height: 1.3;
  margin-bottom: 20px;
}

p + p {
  margin-top: 18px;
}

a {
  text-underline-offset: 0.18em;
}

a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--navy);
  outline-offset: 3px;
}

img {
  max-width: 100%;
}

.wrap {
  margin: 0 auto;
  max-width: 1060px;
  padding: 0 24px;
}

.narrow {
  margin-left: auto;
  margin-right: auto;
  max-width: 680px;
}

.muted {
  color: var(--gray);
}

.space-top {
  margin-top: 24px;
}

.space-top-large {
  margin-top: 30px;
}

.sr-only {
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

.skip-link {
  background: var(--navy);
  color: var(--ivory);
  left: 18px;
  padding: 10px 16px;
  position: fixed;
  top: 12px;
  transform: translateY(-160%);
  transition: transform 0.15s ease;
  z-index: 100;
}

.skip-link:focus {
  transform: translateY(0);
}

section {
  padding: 76px 0;
}

section[id] {
  scroll-margin-top: 92px;
}

.band {
  background: var(--ivory-deep);
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
}

.eyebrow {
  color: var(--gold);
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.btn {
  background: var(--navy-button);
  border: 1px solid var(--navy-button);
  border-radius: 4px;
  box-shadow: 0 6px 18px rgba(26, 58, 92, 0.1);
  color: var(--ivory);
  cursor: pointer;
  display: inline-block;
  font-size: 1rem;
  letter-spacing: 0.04em;
  padding: 15px 34px;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover,
.btn:focus-visible {
  background: var(--navy-button-hover);
  box-shadow: 0 8px 22px rgba(26, 58, 92, 0.14);
  color: var(--ivory);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(26, 58, 92, 0.45);
  box-shadow: none;
  color: var(--navy-button);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: rgba(26, 58, 92, 0.06);
  border-color: var(--navy-button);
  box-shadow: none;
  color: var(--navy-button);
}

.btn-lumi {
  border-color: rgba(15, 110, 86, 0.55);
  color: var(--teal-muted);
}

.btn-lumi:hover,
.btn-lumi:focus-visible {
  background: rgba(15, 110, 86, 0.07);
  border-color: var(--teal-muted);
  color: var(--teal-muted);
}

.btn-small {
  font-size: 0.95rem;
  padding: 11px 24px;
}

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

.header-inner {
  align-items: center;
  display: flex;
  gap: 18px;
  padding: 12px 0;
}

.brand {
  align-items: center;
  color: var(--navy);
  display: flex;
  gap: 12px;
  margin-right: auto;
  text-decoration: none;
}

.signet-s {
  display: block;
  flex: none;
  height: auto;
  width: 66px;
}

.wordmark {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  white-space: nowrap;
}

nav ul {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  list-style: none;
}

nav a {
  border-bottom: 1px solid transparent;
  color: var(--navy);
  font-size: 0.96rem;
  font-weight: 500;
  padding-bottom: 2px;
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
  border-bottom-color: var(--navy);
}

nav a.btn {
  color: var(--ivory);
  padding-bottom: 11px;
}

.hero {
  padding: 80px 0 84px;
}

.hero-grid {
  align-items: center;
  display: grid;
  gap: 56px;
  grid-template-columns: 1.15fr 0.85fr;
}

.hero .pre {
  color: var(--gray);
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
  margin-bottom: 6px;
}

.hero h1 {
  font-size: clamp(2.3rem, 5.4vw, 3.4rem);
  line-height: 1.15;
  margin-bottom: 18px;
}

.hero .sub1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.25rem, 2.6vw, 1.55rem);
  margin-bottom: 4px;
}

.hero .sub2 {
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.08rem, 2.2vw, 1.28rem);
  font-weight: 600;
  margin-bottom: 26px;
}

.hero .desc {
  margin-bottom: 14px;
  max-width: 52ch;
}

.hero .lumi-line {
  color: var(--teal-muted);
  font-weight: 500;
  margin-bottom: 32px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 14px;
}

.hint {
  color: var(--gray);
  font-size: 0.88rem;
}

.bookcard {
  margin: 0 auto;
  max-width: 430px;
  text-align: center;
}

.cover-img {
  border: 0;
  border-radius: 0;
  box-shadow: none;
  display: block;
  height: auto;
  width: 100%;
}

.grid3 {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: var(--ivory);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 32px 28px;
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.card .goldline {
  background: var(--gold);
  height: 2px;
  margin: 0 0 16px;
  width: 40px;
}

.card p {
  font-size: 1rem;
}

.card .q {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.center-intro {
  margin-bottom: 44px;
  text-align: center;
}

.kernsatz {
  background: var(--navy);
  color: var(--ivory);
  padding: 64px 0;
  text-align: center;
}

.kernsatz p {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  line-height: 1.4;
}

.kernsatz .goldline {
  background: var(--gold);
  height: 2px;
  margin: 22px auto 0;
  width: 64px;
}

ul.check,
ul.plain {
  list-style: none;
  margin-top: 8px;
}

ul.check li {
  margin-bottom: 14px;
  padding-left: 34px;
  position: relative;
}

ul.check li::before {
  border-bottom: 2px solid var(--teal);
  border-left: 2px solid var(--teal);
  content: "";
  height: 8px;
  left: 2px;
  position: absolute;
  top: 0.52em;
  transform: rotate(-45deg);
  width: 14px;
}

ul.plain li {
  margin-bottom: 12px;
  padding-left: 26px;
  position: relative;
}

ul.plain li::before {
  color: var(--gold);
  content: "•";
  font-size: 1.05em;
  left: 6px;
  position: absolute;
  top: 0.08em;
}

.weeks {
  display: grid;
  gap: 0;
  margin-top: 36px;
}

.week {
  align-items: baseline;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 22px;
  grid-template-columns: 130px 1fr;
  padding: 24px 4px;
}

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

.week .wn {
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.15rem;
  white-space: nowrap;
}

.week p {
  font-size: 1.05rem;
}

.lumi-box {
  border-left: 3px solid var(--teal);
  padding-left: 26px;
}

.lumi-note {
  color: var(--gray);
  font-size: 0.9rem;
  margin-top: 24px;
}

.lumi-actions {
  margin-top: 24px;
}

.external-note {
  color: var(--gray);
  font-size: 0.88rem;
  margin-top: 12px;
}

.gateway-box {
  background: var(--ivory-deep);
  border: 1px solid var(--line);
  border-radius: 4px;
  margin-top: 28px;
  padding: 28px;
}

.gateway-box h2 {
  font-size: 1.35rem;
}

.gateway-box ul {
  margin: 18px 0 0;
}

.gateway-action {
  margin-top: 30px;
}

.excerpt {
  border-left: 2px solid var(--gold);
  margin: 24px 0 34px;
  padding-left: 24px;
}

.excerpt p:first-child {
  margin-top: 0;
}

.studio-sec {
  text-align: center;
}

.signet-l {
  display: block;
  height: auto;
  margin: 0 auto 26px;
  width: min(200px, 48vw);
}

.studio-sec .wordmark {
  display: block;
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  letter-spacing: 0.3em;
  margin-bottom: 22px;
}

.studio-sec .claim {
  color: var(--gray);
  font-size: 1rem;
  letter-spacing: 0.18em;
  margin-top: 22px;
}

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

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

summary {
  cursor: pointer;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.15rem;
  list-style: none;
  padding: 20px 40px 20px 4px;
  position: relative;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  color: var(--gold);
  content: "+";
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.5rem;
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
}

details[open] summary::after {
  content: "−";
}

details p {
  max-width: 62ch;
  padding: 0 4px 22px;
}

.abschluss {
  text-align: center;
}

.abschluss h2 {
  font-size: clamp(1.7rem, 4vw, 2.3rem);
}

.abschluss .hint {
  margin-top: 14px;
}

footer {
  background: var(--navy);
  color: var(--ivory);
  padding: 52px 0;
  text-align: center;
}

footer .wordmark {
  display: block;
  font-size: 0.95rem;
  letter-spacing: 0.3em;
  margin-bottom: 6px;
}

footer .claim {
  color: rgba(246, 241, 227, 0.75);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  margin-bottom: 20px;
}

footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  justify-content: center;
  list-style: none;
  margin-bottom: 14px;
}

footer a {
  color: rgba(246, 241, 227, 0.88);
  font-size: 0.9rem;
  text-decoration: none;
}

footer a:hover,
footer a:focus-visible {
  color: var(--ivory);
  text-decoration: underline;
}

footer .copy {
  color: rgba(246, 241, 227, 0.64);
  font-size: 0.82rem;
}

.legal-header {
  position: static;
}

.legal-back {
  color: var(--teal-muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.legal-back:hover,
.legal-back:focus-visible {
  text-decoration: underline;
}

.legal-main {
  min-height: 70vh;
  padding: 68px 0 84px;
}

.legal-main h3 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.2rem;
  font-weight: 400;
  margin: 30px 0 10px;
}

.legal-main h1 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  line-height: 1.2;
  margin-bottom: 24px;
}

.legal-main a {
  color: var(--teal-muted);
}

.legal-main a.btn {
  color: var(--ivory);
}

.legal-main a.btn-ghost {
  color: var(--navy-button);
}

.legal-bottom {
  margin-top: 36px;
}

.not-found {
  min-height: 68vh;
  padding: 96px 0;
  text-align: center;
}

.not-found h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  margin-bottom: 18px;
}

.not-found .btn {
  margin-top: 30px;
}

@media (max-width: 900px) {
  body {
    font-size: 17px;
  }

  section {
    padding: 60px 0;
  }

  section[id] {
    scroll-margin-top: 86px;
  }

  .hero {
    padding: 56px 0 64px;
  }

  .hero-grid {
    gap: 44px;
    grid-template-columns: 1fr;
  }

  .bookcard {
    max-width: 330px;
    padding: 0 0 20px;
  }

  .cover-img {
    border: 1px solid rgba(26, 58, 92, 0.12);
    border-radius: 4px;
    box-shadow: 0 12px 30px rgba(26, 58, 92, 0.16);
  }

  .grid3 {
    grid-template-columns: 1fr;
  }

  .week {
    gap: 6px;
    grid-template-columns: 1fr;
    padding: 20px 2px;
  }

  nav ul li:not(:last-child) {
    display: none;
  }

  .header-inner {
    flex-wrap: nowrap;
  }
}

@media (max-width: 520px) {
  .wrap {
    padding: 0 18px;
  }

  .header-inner {
    gap: 10px;
    padding: 10px 0;
  }

  .brand {
    gap: 8px;
  }

  .signet-s {
    width: 46px;
  }

  .wordmark {
    font-size: 0.82rem;
    letter-spacing: 0.16em;
  }

  .btn-small {
    font-size: 0.84rem;
    padding: 9px 13px;
  }

  .hero-cta {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-cta .btn {
    text-align: center;
    width: 100%;
  }

  .legal-header .wordmark {
    display: none;
  }

  .legal-back {
    font-size: 0.88rem;
  }
}

@media (max-width: 370px) {
  .wordmark {
    display: none;
  }
}

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

  .btn,
  .skip-link {
    transition: none;
  }
}