:root {
  --forest: #1a2d21;
  --leaf: #8d9876;
  --mint: #e7f7f1;
  --apricot: #fff0e9;
  --pink: #fdebf4;
  --ink: #151515;
  --muted: #666;
  --line: #e6e2e8;
  --bg: #fafafa;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: var(--forest);
  font-weight: 700;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 2;
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 22px;
  font-weight: 850;
  letter-spacing: 0;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: #fff;
}

.links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
}

.hero {
  padding: 64px 0 34px;
}

.hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(38px, 7vw, 76px);
  line-height: 0.96;
  letter-spacing: 0;
  color: var(--forest);
}

.hero p {
  max-width: 620px;
  margin: 22px 0 0;
  font-size: 20px;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 28px 0 52px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  min-height: 150px;
  box-shadow: 0 10px 24px rgba(26, 45, 33, 0.05);
}

.card:nth-child(1) {
  background: var(--apricot);
}

.card:nth-child(2) {
  background: var(--mint);
}

.card:nth-child(3) {
  background: var(--pink);
}

.card h2 {
  margin: 0 0 8px;
  font-size: 20px;
}

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

.content {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
  margin: 32px 0 48px;
}

.content h1 {
  margin-top: 0;
  color: var(--forest);
  font-size: 36px;
  line-height: 1.05;
}

.content h2 {
  margin-top: 30px;
  font-size: 22px;
}

.content ul {
  padding-left: 22px;
}

.notice {
  background: #fff8df;
  border: 1px solid #f0d98c;
  border-radius: 10px;
  padding: 12px 14px;
  color: #5f4a00;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 36px;
  color: var(--muted);
  font-size: 14px;
}

.invite-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 10% 10%, var(--mint), transparent 38%),
    radial-gradient(circle at 90% 90%, var(--apricot), transparent 42%),
    var(--bg);
}

.invite-shell {
  width: min(640px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 32px 0;
  display: grid;
  place-items: center;
}

.invite-card {
  width: 100%;
  padding: clamp(24px, 6vw, 48px);
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 18px 50px rgba(26, 45, 33, 0.1);
}

.invite-logo {
  display: block;
  border-radius: 20px;
  background: var(--forest);
}

.eyebrow {
  margin: 24px 0 6px;
  color: var(--forest);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.invite-card h1 {
  margin: 0;
  color: var(--forest);
  font-size: clamp(34px, 9vw, 54px);
  line-height: 1.02;
}

.invite-lead {
  margin: 18px 0 24px;
  color: var(--muted);
  font-size: 19px;
}

.same-domain-note {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.primary-action {
  display: block;
  width: 100%;
  padding: 15px 20px;
  border-radius: 12px;
  background: var(--forest);
  color: #fff;
  font-size: 18px;
  text-align: center;
}

.primary-action:hover {
  text-decoration: none;
  filter: brightness(1.08);
}

.invite-note {
  margin: 26px 0 18px;
  padding: 18px;
  border-radius: 12px;
  background: var(--mint);
}

.invite-note h2 {
  margin: 0 0 6px;
  font-size: 19px;
}

.invite-note p,
.invite-card .muted {
  margin: 0;
  color: var(--muted);
}

.invite-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 20px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

@media (max-width: 720px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
  }

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

  .content {
    padding: 20px;
  }

  .invite-shell {
    width: min(100% - 20px, 640px);
    padding: 10px 0;
  }

  .invite-card {
    border-radius: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}