:root {
  --paper: #faf8f4;
  --card: #ffffff;
  --ink: #1c1b19;
  --muted: #6b6760;
  --line: #ece8e1;
  --success: #27bd75;
  --health: #f2598b;
  --connection: #4d7cfe;
  --personal: #f5a623;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, Helvetica, Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 0 24px; }

/* Wordmark */
.wordmark {
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(40px, 9vw, 72px);
  line-height: 1;
}
.wordmark .four { color: var(--ink); }
.wordmark .f { color: var(--success); }
.wordmark .o { color: var(--connection); }
.wordmark .l { color: var(--health); }
.wordmark .d { color: var(--personal); }

/* Hero */
header.hero { padding: 88px 0 56px; text-align: center; }
.hero .tagline {
  margin-top: 22px;
  font-size: clamp(20px, 4.4vw, 28px);
  font-weight: 600;
}
.hero .sub {
  margin: 16px auto 0;
  max-width: 540px;
  font-size: 17px;
  color: var(--muted);
}

/* Four corners */
.corners {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 44px 0;
}
.corner {
  border-radius: 18px;
  padding: 22px 20px;
  color: #fff;
  min-height: 116px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.corner h3 { font-size: 19px; font-weight: 700; }
.corner p { font-size: 14px; opacity: 0.92; margin-top: 4px; }
.c-success { background: var(--success); }
.c-health { background: var(--health); }
.c-connection { background: var(--connection); }
.c-personal { background: var(--personal); }

/* Buttons */
.cta { text-align: center; margin: 8px 0 12px; }
.btn {
  display: inline-block;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 14px 26px;
  border-radius: 999px;
  font-size: 16px;
}
.note { text-align: center; color: var(--muted); font-size: 14px; margin-top: 12px; }

/* Content pages */
main.page { padding: 56px 0 40px; }
.page h1 { font-size: clamp(28px, 6vw, 40px); font-weight: 800; letter-spacing: -0.01em; }
.page .updated { color: var(--muted); font-size: 14px; margin-top: 8px; }
.page h2 { font-size: 20px; font-weight: 700; margin: 32px 0 8px; }
.page p { margin-top: 12px; }
.page ul { margin: 12px 0 0 20px; }
.page li { margin-top: 8px; }
.page a { color: var(--connection); }
.back { display: inline-block; margin-bottom: 28px; color: var(--muted); text-decoration: none; font-size: 15px; }

/* Footer */
footer {
  border-top: 1px solid var(--line);
  margin-top: 64px;
  padding: 32px 0 56px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}
footer a { color: var(--muted); margin: 0 10px; text-decoration: none; }
footer a:hover { color: var(--ink); }
footer .copy { margin-top: 14px; }