:root {
  --navy-900: #0b1f33;
  --navy-800: #123a5c;
  --teal-500: #17a398;
  --teal-600: #128577;
  --bg: #f4f7fa;
  --card-bg: #ffffff;
  --text: #16232f;
  --muted: #5b6b7a;
  --danger: #c0392b;
  --border: #dfe6ec;
  --focus: #2f7dd1;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.top-brand {
  background: var(--navy-900);
  color: #fff;
  padding: 1.75rem 1.25rem 1.5rem;
  text-align: center;
}

.top-brand .logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.top-brand .logo span {
  color: var(--teal-500);
}

.top-brand .tagline {
  margin-top: 0.35rem;
  font-size: 0.95rem;
  color: #c7d3de;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1.25rem 2.5rem;
}

.card {
  width: 100%;
  max-width: 420px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem 1.5rem;
  box-shadow: 0 10px 30px rgba(11, 31, 51, 0.06);
}

.card h1 {
  font-size: 1.25rem;
  margin: 0 0 0.5rem;
  color: var(--navy-900);
}

.card p {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.btn {
  display: block;
  width: 100%;
  padding: 1rem 1.25rem;
  border: none;
  border-radius: 12px;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  min-height: 52px;
  touch-action: manipulation;
}

.btn-primary {
  background: var(--teal-500);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:active {
  background: var(--teal-600);
}

.btn:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.field {
  margin-bottom: 1.1rem;
}

.field label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--navy-900);
}

.field input {
  width: 100%;
  padding: 0.85rem 1rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
}

.field input:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 1px;
  border-color: var(--focus);
}

.error-text {
  color: var(--danger);
  font-size: 0.9rem;
  margin: -0.5rem 0 1rem;
}

footer {
  text-align: center;
  padding: 1.25rem;
  color: var(--muted);
  font-size: 0.8rem;
}