:root {
  --ink: #14213d;
  --muted: #5b6475;
  --line: #e3e7ee;
  --bg: #f7f8fa;
  --card: #ffffff;
  --brand: #0f766e;
  --brand-dark: #0b5a54;
  --accent: #e8f5f3;
  --danger: #b42318;
  --radius: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; color: var(--ink); background: var(--bg);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--brand); }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }
.hidden { display: none !important; }

.site-header { background: var(--card); border-bottom: 1px solid var(--line); }
.header-row { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-weight: 800; font-size: 22px; letter-spacing: -0.02em; color: var(--ink); text-decoration: none; }
.logo::first-letter { color: var(--brand); }
nav a { margin-left: 20px; color: var(--muted); text-decoration: none; font-size: 15px; }
nav a:hover { color: var(--ink); }

.hero { padding: 64px 0 40px; }
.eyebrow { color: var(--brand); font-weight: 600; text-transform: uppercase; letter-spacing: .08em; font-size: 13px; margin: 0 0 12px; }
h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 18px; }
.lead { font-size: 18px; color: var(--muted); max-width: 640px; margin: 0 0 28px; }
.privacy-note { color: var(--muted); font-size: 14px; margin-top: 14px; }

.btn {
  display: inline-block; border: 1px solid var(--line); background: var(--card); color: var(--ink);
  border-radius: 10px; padding: 12px 20px; font-size: 16px; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { background: transparent; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 40px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.step span { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: var(--brand); font-weight: 700; }
.step h3 { margin: 12px 0 6px; font-size: 17px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

.tool { padding-bottom: 64px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.card h2 { font-size: 22px; margin: 0 0 16px; }
.card h2 + .hint { margin-top: -8px; }
.card h3 { margin: 28px 0 8px; font-size: 18px; }
label { display: block; font-weight: 600; font-size: 15px; margin: 0 0 16px; }
input, select, textarea {
  display: block; width: 100%; margin-top: 6px; padding: 11px 12px; font: inherit; font-weight: 400;
  color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 8px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--brand); outline-offset: 1px; border-color: var(--brand); }
fieldset { border: 0; padding: 0; margin: 0 0 16px; }
legend { font-weight: 600; font-size: 15px; margin-bottom: 8px; }
.choices { display: grid; gap: 8px; }
.choice { display: flex; gap: 10px; align-items: center; font-weight: 500; margin: 0; padding: 12px 14px; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.choice input { width: auto; margin: 0; }
.choice:has(input:checked) { border-color: var(--brand); background: var(--accent); }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.hint { color: var(--muted); font-size: 14px; }
.error { color: var(--danger); font-weight: 600; min-height: 1em; }

.deadline { background: var(--accent); border-left: 4px solid var(--brand); padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; }
.deadline p { margin: 4px 0; }
#carta { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 14px; line-height: 1.5; background: #fbfcfd; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.howto, .next { padding-left: 20px; }
.howto li, .next li { margin-bottom: 8px; }
.feedback { background: #fff8e6; padding: 12px 16px; border-radius: 8px; }
.disclaimer { color: var(--muted); font-size: 13px; margin-top: 24px; border-top: 1px solid var(--line); padding-top: 16px; }

.site-footer { border-top: 1px solid var(--line); background: var(--card); color: var(--muted); font-size: 14px; }
.site-footer p { margin: 0; padding: 20px 0; }

.legal h1 { font-size: 32px; }
.legal h2 { font-size: 20px; margin-top: 28px; }
.legal p, .legal li { color: #2c3547; }
.todo { background: #fff3cd; padding: 0 4px; border-radius: 4px; }

@media (max-width: 680px) {
  .steps, .grid { grid-template-columns: 1fr; }
  nav a:first-child { display: none; }
  .card { padding: 20px; }
}