:root {
  --ink: #0b0d10;
  --charcoal: #15181d;
  --paper: #fbfaf6;
  --warm: #eee5d4;
  --panel: #f4f0e8;
  --muted: #a8a194;
  --gold: #c89b48;
  --teal: #0f6b70;
  --wine: #7d2335;
  --line: rgba(255, 255, 255, 0.14);
  --soft-line: rgba(11, 13, 16, 0.12);
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.34);
  color-scheme: dark light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", Arial, sans-serif;
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 16px clamp(18px, 4vw, 54px);
  background: rgba(11, 13, 16, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(200, 155, 72, 0.72);
  border-radius: 50%;
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 22px;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.05;
}

.brand strong {
  font-size: 17px;
}

.brand small {
  margin-top: 3px;
  color: rgba(251, 250, 246, 0.62);
  font-size: 11px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: clamp(14px, 2vw, 30px);
  color: rgba(251, 250, 246, 0.78);
  font-size: 14px;
}

.nav-links a {
  transition: color 160ms ease;
}

.nav-links a:hover {
  color: var(--paper);
}

.language-switcher {
  display: flex;
  gap: 5px;
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.24);
}

.language-switcher button {
  min-width: 36px;
  height: 30px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: rgba(251, 250, 246, 0.68);
  cursor: pointer;
}

.language-switcher button.active {
  background: var(--paper);
  color: var(--ink);
}

.menu-toggle {
  display: none;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  align-items: center;
  min-height: 94svh;
  padding: 106px clamp(18px, 6vw, 86px) 46px;
  gap: clamp(34px, 6vw, 86px);
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(11, 13, 16, 0.82), rgba(11, 13, 16, 0.45) 48%, rgba(11, 13, 16, 0.12)),
    linear-gradient(180deg, rgba(11, 13, 16, 0.08), rgba(11, 13, 16, 0.78)),
    url("assets/seth-hero.png") center / cover no-repeat;
  transform: scale(1.02);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 38vh;
  z-index: -1;
  background: linear-gradient(180deg, transparent, var(--ink));
}

.hero-content {
  max-width: 900px;
  padding-bottom: 0;
}

.eyebrow,
.section-label {
  margin: 0 0 18px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  max-width: 820px;
  margin: 0;
  color: #fff8e7;
  font-family: Georgia, "Times New Roman", "Noto Serif SC", serif;
  font-size: clamp(46px, 5vw, 72px);
  line-height: 1.02;
  font-weight: 500;
  overflow-wrap: normal;
  word-break: keep-all;
}

h2 {
  margin: 0;
  max-width: 840px;
  font-size: clamp(34px, 5vw, 72px);
  line-height: 1.05;
  font-weight: 650;
}

h3 {
  margin: 0;
}

.hero-copy {
  max-width: 760px;
  margin: 24px 0 0;
  color: rgba(251, 250, 246, 0.8);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.76;
}

.hero-actions,
.book-actions,
.support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
}

.button.primary {
  background: var(--gold);
  color: #17120b;
}

.button.secondary {
  border: 1px solid rgba(251, 250, 246, 0.34);
  color: var(--paper);
}

.button.secondary.dark {
  border-color: rgba(11, 13, 16, 0.24);
  color: var(--ink);
}

.hero-visual-stack {
  align-self: center;
  display: grid;
  width: min(420px, 100%);
  gap: 16px;
}

.hero-path {
  display: grid;
  width: 100%;
  gap: 1px;
  margin-bottom: 0;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-image-card {
  display: grid;
  gap: 0;
  margin: 0;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(10, 12, 15, 0.76);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-image-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.hero-image-card figcaption {
  padding: 14px 16px;
  color: rgba(251, 250, 246, 0.72);
  font-size: 13px;
  line-height: 1.5;
}

.hero-path a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 16px;
  padding: 18px 20px;
  background: rgba(10, 12, 15, 0.76);
}

.hero-path span {
  grid-row: 1 / span 2;
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 24px;
}

.hero-path strong {
  color: #fff8e7;
  font-size: 18px;
}

.hero-path small {
  color: rgba(251, 250, 246, 0.68);
  line-height: 1.45;
}

.section {
  padding: clamp(72px, 10vw, 132px) clamp(18px, 6vw, 88px);
}

.section-heading {
  width: min(1040px, 100%);
  margin-bottom: clamp(40px, 7vw, 78px);
}

.section-heading p:not(.section-label) {
  max-width: 840px;
  margin: 24px 0 0;
  color: rgba(251, 250, 246, 0.74);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.72;
}

.start {
  background: #101318;
}

.start-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.start-steps article,
.idea-grid article,
.mission-grid article {
  min-height: 260px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
}

.start-steps span {
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 46px;
}

.start-steps h3,
.idea-grid h3,
.mission-grid h3 {
  margin-top: 34px;
  color: #fff8e7;
  font-size: clamp(24px, 2.4vw, 32px);
  line-height: 1.16;
}

.start-steps p,
.idea-grid p,
.mission-grid p {
  margin: 16px 0 0;
  color: rgba(251, 250, 246, 0.7);
  line-height: 1.68;
}

.start-steps a {
  display: inline-block;
  margin-top: 24px;
  color: var(--gold);
  font-weight: 800;
}

.about,
.support {
  background:
    linear-gradient(135deg, rgba(15, 107, 112, 0.16), transparent 42%),
    var(--panel);
  color: var(--ink);
}

.split,
.support-panel,
.community-panel {
  display: grid;
  grid-template-columns: 0.8fr 1fr;
  gap: clamp(34px, 7vw, 90px);
  width: min(1180px, 100%);
  margin: 0 auto;
}

.about .section-label,
.support .section-label {
  color: var(--wine);
}

.reading-panel > p,
.support-panel p,
.community-panel p {
  margin: 0;
  color: rgba(21, 24, 29, 0.76);
  font-size: clamp(18px, 2.1vw, 24px);
  line-height: 1.72;
}

.trust-list {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  border: 1px solid var(--soft-line);
  background: var(--soft-line);
}

.trust-list div {
  padding: 22px;
  background: rgba(251, 250, 246, 0.72);
}

.trust-list strong,
.trust-list span {
  display: block;
}

.trust-list strong {
  color: var(--wine);
  font-size: 18px;
}

.trust-list span {
  margin-top: 8px;
  color: rgba(21, 24, 29, 0.68);
  line-height: 1.55;
}

.ideas,
.mission,
.study,
.community {
  background:
    radial-gradient(circle at 88% 10%, rgba(200, 155, 72, 0.12), transparent 30%),
    #0b0d10;
}

.idea-grid,
.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.mission-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.idea-grid span {
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.book {
  background:
    linear-gradient(135deg, rgba(200, 155, 72, 0.14), transparent 36%),
    linear-gradient(180deg, #101318, #0b0d10);
}

.book-panel {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(280px, 0.58fr);
  width: min(1180px, 100%);
  margin: 0 auto;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.045);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.book-copy {
  padding: clamp(32px, 5vw, 64px);
}

.book h2 {
  font-family: Georgia, "Times New Roman", "Noto Serif SC", serif;
}

.book-kicker {
  margin: 18px 0 24px;
  color: var(--gold);
  font-weight: 800;
}

.book-copy > p:not(.section-label):not(.book-kicker) {
  max-width: 720px;
  margin: 0;
  color: rgba(251, 250, 246, 0.76);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.72;
}

.book-side {
  display: grid;
  align-content: end;
  gap: 28px;
  min-height: 460px;
  padding: clamp(30px, 5vw, 54px);
  background:
    linear-gradient(180deg, rgba(12, 15, 18, 0.12), rgba(12, 15, 18, 0.88)),
    linear-gradient(90deg, rgba(12, 15, 18, 0.58), rgba(12, 15, 18, 0.08)),
    url("assets/seth-hero.png") center / cover no-repeat,
    #15181d;
}

.book-side > p {
  margin: 0;
  color: #fff8e7;
  font-family: Georgia, "Times New Roman", "Noto Serif SC", serif;
  font-size: clamp(25px, 3vw, 42px);
  line-height: 1.28;
}

.book-side div {
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.book-side strong,
.book-side span {
  display: block;
}

.book-side strong {
  color: var(--gold);
}

.book-side span {
  margin-top: 8px;
  color: rgba(251, 250, 246, 0.68);
  line-height: 1.58;
}

.support-panel {
  align-items: start;
  padding: clamp(30px, 5vw, 64px);
  border: 1px solid rgba(11, 13, 16, 0.12);
  border-radius: 8px;
  background: rgba(251, 250, 246, 0.58);
}

.study {
  background:
    linear-gradient(135deg, rgba(125, 35, 53, 0.18), transparent 40%),
    linear-gradient(225deg, rgba(200, 155, 72, 0.12), transparent 42%),
    #101318;
}

.study-panel {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(320px, 1fr);
  gap: clamp(34px, 7vw, 86px);
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: clamp(30px, 5vw, 64px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.045);
  box-shadow: var(--shadow);
}

.study-panel > div > p:not(.section-label) {
  margin: 24px 0 0;
  color: rgba(251, 250, 246, 0.76);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.72;
}

.study-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.study-list {
  display: grid;
  gap: 1px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  background: rgba(255, 255, 255, 0.11);
}

.study-list article {
  min-height: 150px;
  padding: 24px;
  background: rgba(11, 13, 16, 0.66);
}

.study-list span {
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 24px;
}

.study-list h3 {
  margin-top: 14px;
  color: #fff8e7;
  font-size: 24px;
}

.study-list p {
  margin: 10px 0 0;
  color: rgba(251, 250, 246, 0.68);
  line-height: 1.6;
}

.community-panel {
  padding: clamp(30px, 5vw, 64px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.045);
  box-shadow: var(--shadow);
}

.community-panel p {
  color: rgba(251, 250, 246, 0.76);
}

.signup-form {
  margin-top: 32px;
}

.signup-form label {
  display: block;
  margin-bottom: 10px;
  color: rgba(251, 250, 246, 0.68);
  font-size: 14px;
}

.signup-form div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.signup-form input,
.signup-form button {
  min-height: 50px;
  border-radius: 999px;
}

.signup-form input {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(0, 0, 0, 0.28);
  color: var(--paper);
  padding: 0 18px;
  outline: 0;
}

.signup-form input:focus {
  border-color: rgba(200, 155, 72, 0.82);
}

.signup-form button {
  border: 0;
  background: var(--paper);
  color: var(--ink);
  padding: 0 24px;
  font-weight: 800;
  cursor: pointer;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(18px, 6vw, 88px);
  border-top: 1px solid rgba(255, 255, 255, 0.11);
  color: rgba(251, 250, 246, 0.58);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 1080px) {
  .site-header {
    grid-template-columns: auto auto;
  }

  .menu-toggle {
    display: inline-grid;
    gap: 6px;
    justify-self: end;
    width: 42px;
    height: 38px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.26);
    padding: 11px;
  }

  .menu-toggle span {
    height: 1px;
    background: var(--paper);
  }

  .nav-links,
  .language-switcher {
    grid-column: 1 / -1;
    display: none;
    justify-content: start;
  }

  .site-header.open .nav-links,
  .site-header.open .language-switcher {
    display: flex;
  }

  .nav-links {
    flex-wrap: wrap;
    padding-top: 12px;
  }

  .hero,
  .split,
  .support-panel,
  .community-panel,
  .study-panel,
  .book-panel {
    grid-template-columns: 1fr;
  }

  .hero-visual-stack {
    margin-bottom: 20px;
  }

  .start-steps,
  .idea-grid,
  .mission-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .site-header {
    padding: 14px 16px;
  }

  .brand small {
    display: none;
  }

  .hero {
    padding: 104px 18px 34px;
  }

  h1 {
    font-size: clamp(46px, 15vw, 72px);
  }

  .start-steps,
  .idea-grid,
  .mission-grid {
    grid-template-columns: 1fr;
  }

  .start-steps article,
  .idea-grid article,
  .mission-grid article {
    min-height: 210px;
  }

  .book-side {
    min-height: 310px;
  }

  .book-actions .button,
  .study-actions .button,
  .support-actions .button {
    width: 100%;
  }

  .signup-form div {
    grid-template-columns: 1fr;
  }

  .site-footer {
    display: grid;
  }
}