:root {
  --color-bg: #faf8f4;
  --color-card: #ffffff;
  --color-text: #1f2933;
  --color-muted: #5b6673;
  --color-border: #e2ded4;
  --color-brand: #0b5fa5;
  --color-brand-dark: #084a82;
  --color-error: #b3261e;
  --color-error-bg: #fdecea;
  --radius: 14px;
  --shadow: 0 12px 32px rgba(15, 42, 67, 0.10);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
}

.page {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 420px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 28px;
}

.brand {
  margin: 0 0 4px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-brand);
}

h1 {
  margin: 0 0 20px;
  font-size: 1.4rem;
  color: var(--color-text);
}

.state {
  display: block;
}

[hidden] {
  display: none !important;
}

.spinner {
  width: 28px;
  height: 28px;
  margin: 8px 0 16px;
  border-radius: 50%;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-brand);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.message {
  margin: 0 0 12px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 0.95rem;
}

.message-error {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.hint {
  margin: 16px 0 0;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.hint a {
  color: var(--color-brand-dark);
  font-weight: 600;
}

form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9rem;
  font-weight: 600;
}

.field input[type="email"] {
  width: 100%;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #fff;
  color: var(--color-text);
}

.field input[type="email"]:focus-visible {
  outline: 3px solid var(--color-brand);
  outline-offset: 1px;
}

.field input:disabled {
  background: #f2f0eb;
  color: var(--color-muted);
  cursor: not-allowed;
}

.field-control {
  display: flex;
  align-items: stretch;
  gap: 8px;
}

.field-control input[type="password"],
.field-control input[type="text"] {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #fff;
  color: var(--color-text);
}

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

.toggle-visibility {
  flex-shrink: 0;
  padding: 0 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-brand-dark);
  background: #eef4fb;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  cursor: pointer;
}

.toggle-visibility:hover {
  background: #e2ecf8;
}

.toggle-visibility:focus-visible {
  outline: 3px solid var(--color-brand);
  outline-offset: 1px;
}

.checkbox-field {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--color-text);
  cursor: pointer;
}

.checkbox-field input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-brand);
  flex-shrink: 0;
}

.checkbox-field input[type="checkbox"]:focus-visible {
  outline: 3px solid var(--color-brand);
  outline-offset: 2px;
}

.primary-button {
  margin-top: 4px;
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-brand);
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

.primary-button:hover:not(:disabled) {
  background: var(--color-brand-dark);
}

.primary-button:focus-visible {
  outline: 3px solid var(--color-brand-dark);
  outline-offset: 2px;
}

.primary-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

  .field-control {
    flex-wrap: wrap;
  }

  .toggle-visibility {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .spinner {
    animation: none;
    border-top-color: var(--color-border);
  }
}