:root {
  --bg: #f4f6fa;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --line: #cbd5e1;
  --accent: #1d4ed8;
  --accent-ink: #ffffff;
  --error: #b42318;
  --focus: #1d4ed8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --card: #111a2e;
    --ink: #e6ebf5;
    --muted: #a7b3c9;
    --line: #2b3a57;
    --accent: #60a5fa;
    --accent-ink: #0b1220;
    --error: #ff8a80;
    --focus: #93c5fd;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.card {
  width: 100%;
  max-width: 440px;
  padding: 32px 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.brand {
  margin: 0 0 20px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--muted);
}

h1 {
  margin: 0 0 12px;
  font-size: 24px;
  line-height: 1.25;
  font-weight: 650;
}

h1:focus { outline: none; }

p { margin: 0 0 16px; }

.lead, .note { color: var(--muted); }

.note { font-size: 14px; margin-top: 20px; margin-bottom: 0; }

label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 15px;
}

input[type="email"] {
  width: 100%;
  min-height: 48px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}

input[aria-invalid="true"] { border-color: var(--error); }

button {
  width: 100%;
  min-height: 48px;
  margin-top: 16px;
  padding: 10px 16px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}

button[disabled] { opacity: 0.65; cursor: default; }

a { color: var(--accent); }

.error {
  margin: 8px 0 0;
  color: var(--error);
  font-size: 14px;
}

input:focus-visible, button:focus-visible, a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

[hidden] { display: none !important; }

/* Long text pages: privacy policy and terms of use */
.card.doc { max-width: 720px; padding: 36px 32px; }

.doc h2 {
  margin: 32px 0 8px;
  font-size: 18px;
  line-height: 1.3;
  font-weight: 650;
}

.doc ul { margin: 0 0 16px; padding-left: 22px; }

.doc li { margin-bottom: 6px; }

.doc address { margin: 0 0 16px; font-style: normal; }

.updated { color: var(--muted); font-size: 14px; }

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 28px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

@media (max-width: 480px) {
  .card.doc { padding: 28px 20px; }
}

.brand a { color: inherit; text-decoration: none; }