:root {
  color-scheme: light;
  --bg-top: #ebf2ff;
  --bg-bottom: #f9fbff;
  --card: rgba(255, 255, 255, 0.92);
  --text: #0f172a;
  --muted: #475569;
  --accent: #0f62fe;
  --accent-strong: #0b4ed1;
  --error: #b42318;
  --border: rgba(15, 23, 42, 0.08);
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(15, 98, 254, 0.16), transparent 32%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
  color: var(--text);
}

body {
  min-height: 100vh;
  padding:
    max(20px, env(safe-area-inset-top))
    18px
    max(20px, env(safe-area-inset-bottom));
}

.shell {
  min-height: calc(100vh - 40px);
  display: grid;
  place-items: center;
}

.card {
  width: min(100%, 420px);
  padding: 28px 22px;
  border-radius: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.2;
}

.lead {
  margin: 10px 0 24px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 600;
}

input,
button {
  width: 100%;
  border-radius: 16px;
  font: inherit;
}

input {
  padding: 16px 14px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  background: #fff;
  font-size: 16px;
  color: var(--text);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

input:focus {
  border-color: rgba(15, 98, 254, 0.55);
  box-shadow: 0 0 0 4px rgba(15, 98, 254, 0.12);
}

button {
  margin-top: 14px;
  padding: 16px 18px;
  border: 0;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

button:disabled {
  opacity: 0.55;
}

.message {
  min-height: 24px;
  margin: 14px 2px 0;
  font-size: 14px;
  color: var(--error);
}

.success {
  text-align: center;
}

.hidden {
  display: none;
}

@media (max-width: 420px) {
  .card {
    padding: 24px 18px;
    border-radius: 22px;
  }

  h1 {
    font-size: 28px;
  }
}