* {
  box-sizing: border-box;
}

:root {
  --bg: #f6f5f2;
  --ink: #121212;
  --muted: #5f6368;
  --line: #dfd8cd;
  --card: rgba(255,255,255,0.88);
  --accent: #24493f;
  --accent-dark: #163229;
  --soft: #ece6da;
  --dark: #101917;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, #ffffff 0%, transparent 35%),
    radial-gradient(circle at bottom right, #efe8dd 0%, transparent 40%),
    var(--bg);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.container {
  width: min(1160px, calc(100% - 42px));
  margin: 0 auto;
}

.narrow {
  width: min(860px, calc(100% - 42px));
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246,245,242,0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.nav {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
}

.brand {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.04em;
}

nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-family: Arial, sans-serif;
  font-size: 14px;
}

nav a {
  text-decoration: none;
  color: var(--muted);
  transition: color .2s ease;
}

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

.nav-cta {
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid rgba(36,73,63,0.25);
  background: rgba(255,255,255,0.7);
  color: var(--accent);
}

.hero {
  padding: 120px 0 100px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0,1.08fr) minmax(360px,.82fr);
  gap: 72px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 18px;
  font-family: Arial, sans-serif;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: 12px;
  font-weight: 700;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.06;
}

h1 {
  font-size: clamp(52px, 7vw, 92px);
  letter-spacing: -0.065em;
  max-width: 760px;
}

h2 {
  font-size: clamp(34px, 4vw, 56px);
  letter-spacing: -0.05em;
}

h3 {
  font-size: 24px;
  letter-spacing: -0.03em;
}

.lead {
  font-size: 24px;
  color: #2f3336;
  max-width: 700px;
  margin: 30px 0 0;
}

.hero-actions {
  margin-top: 42px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  text-decoration: none;
  font-family: Arial, sans-serif;
  font-weight: 700;
  font-size: 14px;
  transition:
    transform .18s ease,
    box-shadow .18s ease,
    background .18s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  box-shadow: 0 10px 30px rgba(22,50,41,0.18);
}

.button.secondary {
  border: 1px solid rgba(0,0,0,0.08);
  background: rgba(255,255,255,0.8);
}

.button.large {
  min-height: 58px;
  padding: 0 30px;
}

.mock-panel {
  background: rgba(255,255,255,0.78);
  border: 1px solid rgba(255,255,255,0.7);
  border-radius: 28px;
  padding: 28px;
  backdrop-filter: blur(18px);
  box-shadow:
    0 30px 90px rgba(0,0,0,0.08),
    0 10px 30px rgba(0,0,0,0.04);
}

.mock-title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}

.mock-title-row h2 {
  font-size: 26px;
}

.mock-title-row span {
  font-family: Arial, sans-serif;
  font-size: 11px;
  color: var(--muted);
}

.tabs {
  display: flex;
  gap: 18px;
  padding: 16px 0;
  font-family: Arial, sans-serif;
  font-size: 14px;
}

.tabs strong {
  text-decoration: underline;
  text-underline-offset: 5px;
}

.tabs span {
  color: var(--muted);
}

.mock-panel article {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.mock-panel small {
  font-family: Arial, sans-serif;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: 10px;
  font-weight: 700;
}

.mock-panel h3 {
  font-size: 21px;
  margin-top: 6px;
}

.mock-panel p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.section {
  padding: 110px 0;
}

.section-heading {
  max-width: 860px;
  margin-bottom: 44px;
}

.section-heading p:not(.eyebrow) {
  font-size: 21px;
  color: var(--muted);
}

.problem {
  background: linear-gradient(180deg, rgba(236,230,218,0.65), rgba(236,230,218,0.35));
}

.problem p,
.narrow p {
  font-size: 22px;
  color: #2d3134;
}

.cards {
  display: grid;
  gap: 22px;
}

.cards.three {
  grid-template-columns: repeat(3,1fr);
}

.cards.five {
  grid-template-columns: repeat(5,1fr);
}

.card {
  background: rgba(255,255,255,0.74);
  border: 1px solid rgba(255,255,255,0.8);
  border-radius: 24px;
  padding: 30px;
  backdrop-filter: blur(10px);
  box-shadow:
    0 8px 24px rgba(0,0,0,0.03),
    0 2px 8px rgba(0,0,0,0.02);
}

.card.small {
  padding: 24px;
}

.card p {
  margin: 14px 0 0;
  color: var(--muted);
}

.number {
  display: inline-flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  background: var(--soft);
  border-radius: 999px;
  color: var(--accent);
  font-family: Arial, sans-serif;
  font-weight: 700;
  margin-bottom: 18px;
}

.dark {
  background:
    radial-gradient(circle at top left, rgba(255,255,255,0.06), transparent 30%),
    var(--dark);
  color: #fff;
}

.dark p {
  color: rgba(255,255,255,0.78);
}

.thread-line {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 18px;
}

.thread-line div {
  background: rgba(255,255,255,0.8);
  border: 1px solid rgba(255,255,255,0.9);
  border-radius: 22px;
  padding: 26px;
  backdrop-filter: blur(10px);
}

.thread-line strong {
  color: var(--accent);
  font-size: 24px;
}

.thread-line p {
  margin: 10px 0 0;
  color: var(--muted);
}

.center-copy {
  text-align: center;
  font-size: 21px;
  margin: 34px auto 0;
  max-width: 760px;
  color: var(--muted);
}

.principle-box {
  margin-top: 34px;
  border-radius: 24px;
  background: rgba(236,230,218,0.6);
  padding: 34px;
  font-size: 21px;
}

.principle-box p {
  margin-top: 0;
}

.muted {
  background: rgba(239,233,224,0.55);
}

.tagline {
  font-weight: 700;
}

.cta {
  text-align: center;
}

.note {
  font-family: Arial, sans-serif;
  color: var(--muted);
  font-size: 14px !important;
}

.site-footer {
  border-top: 1px solid rgba(0,0,0,0.08);
  padding: 42px 0;
  font-family: Arial, sans-serif;
  color: var(--muted);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 28px;
}

.footer-grid p {
  margin: 8px 0 0;
}

.footer-grid div:last-child {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-grid a {
  text-decoration: none;
}

@media (max-width: 900px) {
  nav {
    display: none;
  }

  .hero {
    padding-top: 72px;
  }

  .hero-grid,
  .cards.three,
  .cards.five,
  .thread-line {
    grid-template-columns: 1fr;
  }

  .lead,
  .problem p,
  .narrow p {
    font-size: 19px;
  }

  .footer-grid {
    display: block;
  }

  .footer-grid div:last-child {
    margin-top: 18px;
  }
}

.invite-box {
  margin-top: 28px;
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 16px 40px rgba(0,0,0,0.05);
}

.invite-box label {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
  font-weight: 700;
}

.invite-box input,
.invite-box textarea {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font: inherit;
  line-height: 1.6;
}

.invite-box textarea {
  resize: vertical;
}