:root {
  color-scheme: light dark;
  --canvas: #f7f8f3;
  --surface: #ffffff;
  --ink: #18201e;
  --muted: #5e6763;
  --line: #dce3dd;
  --coral: #e84d5b;
  --teal: #176d67;
  --citron: #d7f36b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

main { width: min(760px, calc(100% - 40px)); margin: 0 auto; padding: 48px 0 80px; }
nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 64px; }
.brand { color: var(--ink); font-size: 28px; font-weight: 900; letter-spacing: -.04em; text-decoration: none; }
.pill { border-radius: 999px; background: var(--citron); color: #18201e; padding: 8px 14px; font-size: 13px; font-weight: 800; }
h1 { max-width: 650px; margin: 0 0 16px; font-size: clamp(42px, 8vw, 72px); line-height: .98; letter-spacing: -.055em; }
.lead { max-width: 620px; color: var(--muted); font-size: 20px; }
.card { margin-top: 42px; padding: clamp(24px, 6vw, 44px); border: 1px solid var(--line); border-radius: 30px; background: var(--surface); }
h2 { margin: 34px 0 8px; font-size: 22px; letter-spacing: -.02em; }
h2:first-child { margin-top: 0; }
a { color: var(--teal); font-weight: 750; }
.notice { border-left: 5px solid var(--coral); padding: 12px 16px; background: color-mix(in srgb, var(--coral) 8%, transparent); }
footer { margin-top: 36px; color: var(--muted); font-size: 14px; }

form { margin-top: 28px; padding-top: 28px; border-top: 1px solid var(--line); }
.field { display: grid; gap: 7px; margin-bottom: 18px; }
label { font-weight: 800; }
input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--canvas);
  color: var(--ink);
  font: inherit;
  padding: 12px 14px;
}
textarea { min-height: 144px; resize: vertical; }
input:focus-visible,
textarea:focus-visible,
button:focus-visible,
a:focus-visible { outline: 3px solid var(--citron); outline-offset: 3px; }
button {
  min-height: 48px;
  border: 0;
  border-radius: 999px;
  background: var(--teal);
  color: #ffffff;
  cursor: pointer;
  font: inherit;
  font-weight: 850;
  padding: 12px 22px;
}
button:hover { filter: brightness(1.08); }
.form-note { color: var(--muted); font-size: 14px; }

@media (max-width: 520px) {
  main { width: min(100% - 28px, 760px); padding-top: 28px; }
  nav { margin-bottom: 46px; }
  .pill { padding: 7px 10px; }
  .card { border-radius: 24px; }
  button { width: 100%; }
}

@media (prefers-color-scheme: dark) {
  :root { --canvas: #101513; --surface: #18201d; --ink: #f4f7f1; --muted: #a7b1ac; --line: #2c3833; --coral: #ff6875; --teal: #66c9be; }
  button { color: #101513; }
}