:root {
  color-scheme: light;
  --color-primary: #0369a1;
  --color-secondary: #0ea5e9;
  --color-cta: #22c55e;
  --color-background: #f0f9ff;
  --color-text: #0c4a6e;
  --color-border: rgba(3, 105, 161, 0.14);
  --color-rule: rgba(12, 74, 110, 0.72);
  --color-error: #b91c1c;
  --color-message-bg: rgba(14, 165, 233, 0.1);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  background: var(--color-background);
  color: var(--color-text);
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 40px 20px;
}

.card {
  width: min(100%, 520px);
  padding: 40px 28px 32px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 16px 40px rgba(12, 74, 110, 0.08);
}

.hero {
  display: grid;
  gap: 14px;
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0;
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.24em;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 2.8rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0;
  max-width: 24rem;
  color: var(--color-rule);
  font-size: 1.02rem;
  line-height: 1.7;
}

.form {
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  font-size: 0.95rem;
  font-weight: 600;
}

.field input {
  width: 100%;
  min-height: 52px;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: #fff;
  color: var(--color-text);
  font: inherit;
}

.field input:focus {
  outline: 3px solid rgba(14, 165, 233, 0.22);
  border-color: var(--color-secondary);
}

.rule,
.error,
.message {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
}

.rule {
  color: var(--color-rule);
}

.error {
  color: var(--color-error);
}

.message {
  margin-bottom: 20px;
  padding: 14px 16px;
  border: 1px solid rgba(14, 165, 233, 0.18);
  border-radius: 14px;
  background: var(--color-message-bg);
  color: var(--color-text);
}

button {
  min-height: 54px;
  border: 0;
  border-radius: 14px;
  padding: 0 20px;
  background: var(--color-cta);
  color: #f8fffb;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background-color 120ms ease;
}

button:hover {
  background: #16a34a;
}

button:focus-visible {
  outline: 3px solid rgba(34, 197, 94, 0.24);
  outline-offset: 3px;
}

.hidden {
  display: none;
}

@media (max-width: 640px) {
  .page {
    padding: 24px 16px;
  }

  .card {
    padding: 32px 20px 24px;
    border-radius: 18px;
  }

  h1 {
    font-size: clamp(1.9rem, 10vw, 2.4rem);
  }
}