:root {
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-soft: #eff6ff;
  --text: #0f172a;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --surface: #ffffff;
  --bg: #f8fafc;
  --danger: #dc2626;
  --success: #059669;
}

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

html,
body {
  touch-action: manipulation;
}

body {
  min-height: 100vh;
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "PingFang SC",
    "Microsoft YaHei",
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 42%),
    radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.08), transparent 38%),
    var(--bg);
  line-height: 1.5;
}

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

button,
input {
  font: inherit;
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
}

.card {
  width: min(420px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px 28px 28px;
  box-shadow:
    0 20px 45px rgba(15, 23, 42, 0.08),
    0 2px 8px rgba(15, 23, 42, 0.04);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: linear-gradient(145deg, #3b82f6 0%, #1d4ed8 100%);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.28);
}

.brand-copy h1 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-copy p {
  margin-top: 4px;
  font-size: 14px;
  color: var(--text-secondary);
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.field span {
  font-size: 14px;
  font-weight: 600;
}

.field input {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.turnstile {
  display: flex;
  justify-content: center;
  min-height: 65px;
  margin: 4px 0 12px;
}

.submit {
  width: 100%;
  height: 48px;
  margin-top: 6px;
  border: 0;
  border-radius: 12px;
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(145deg, #3b82f6 0%, #1d4ed8 100%);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.24);
  transition: transform 0.12s ease, opacity 0.12s ease;
}

.submit:hover:not(:disabled) {
  transform: translateY(-1px);
}

.submit:disabled {
  opacity: 0.72;
  cursor: wait;
}

.status {
  min-height: 22px;
  margin-top: 14px;
  font-size: 14px;
  color: var(--danger);
}

.status[data-kind="success"] {
  color: var(--success);
}

.tip {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-secondary);
}

.footer {
  margin-top: 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
}

@media (max-width: 480px) {
  .card {
    padding: 28px 20px 22px;
    border-radius: 16px;
  }
}