/* ==========================================================================
   lean-auth login page — SemanticWorks corporate identity
   Follows: corporate-identity/guidelines.md + colors/palette.css
   ========================================================================== */

/* --- Design tokens (subset from palette.css) --- */
:root {
  --color-navy-500: #000080;
  --color-navy-400: #2E2E9C;
  --color-navy-50: #E8EAF6;
  --color-blue-500: #256dbd;
  --color-blue-600: #1E5DA6;
  --color-blue-700: #174A88;
  --color-neutral-50: #F8F9FA;
  --color-neutral-100: #F0F1F4;
  --color-neutral-200: #E1E3E8;
  --color-neutral-300: #C8CCD3;
  --color-neutral-500: #6E737D;
  --color-neutral-600: #555B65;
  --color-neutral-900: #1A1A2E;
  --color-error: #C4280D;
  --color-error-light: #FDDDD6;
  --color-success: #1A7F37;
  --color-success-light: #DAFBE1;

  --font-family: "Source Sans 3", "Source Sans Pro", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --border-radius: 8px;
  --transition-hover: 200ms ease-out;
}

/* --- Reset --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* --- Base --- */
body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-neutral-900);
  background: var(--color-neutral-50);
  -webkit-font-smoothing: antialiased;
}

/* --- Layout --- */
.login-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: #FFFFFF;
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--border-radius);
  padding: 48px 32px 32px;
  position: relative;
}

/* --- Header --- */
.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo {
  height: 48px;
  width: auto;
  margin-bottom: 16px;
}

.login-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-navy-500);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

/* --- Steps --- */
.step {
  display: none;
}

.step.active {
  display: block;
}

.step-info {
  font-size: 0.875rem;
  color: var(--color-neutral-600);
  margin-bottom: 24px;
  line-height: 1.5;
}

/* --- Forms --- */
label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-neutral-900);
  margin-bottom: 6px;
}

input[type="email"],
input[type="text"] {
  display: block;
  width: 100%;
  padding: 10px 12px;
  font-family: var(--font-family);
  font-size: 1rem;
  color: var(--color-neutral-900);
  background: #FFFFFF;
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--border-radius);
  outline: none;
  transition: border-color var(--transition-hover);
}

input:focus {
  border-color: var(--color-blue-500);
  box-shadow: 0 0 0 2px rgba(37, 109, 189, 0.15);
}

input::placeholder {
  color: var(--color-neutral-500);
}

/* OTP code input — monospaced, larger, centered */
#otp-code {
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  font-size: 1.5rem;
  text-align: center;
  letter-spacing: 0.3em;
  padding: 12px;
}

/* --- Buttons --- */
.btn-primary {
  display: block;
  width: 100%;
  padding: 12px;
  margin-top: 16px;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  color: #FFFFFF;
  background: var(--color-navy-500);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background var(--transition-hover);
  min-height: 48px;
}

.btn-primary:hover {
  background: var(--color-navy-400);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--color-blue-500);
  outline-offset: 2px;
}

.btn-primary:disabled {
  background: var(--color-neutral-300);
  cursor: not-allowed;
}

.btn-link {
  display: block;
  width: 100%;
  margin-top: 12px;
  padding: 8px;
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-blue-600);
  background: none;
  border: none;
  cursor: pointer;
  text-align: center;
  transition: color var(--transition-hover);
}

.btn-link:hover {
  color: var(--color-blue-700);
  text-decoration: underline;
}

/* --- Passkey prompt --- */
.passkey-prompt-icon {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.step h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-navy-500);
  text-align: center;
  margin-bottom: 8px;
}

/* --- Error --- */
.error {
  margin-top: 16px;
  padding: 12px;
  font-size: 0.875rem;
  color: var(--color-error);
  background: var(--color-error-light);
  border-radius: var(--border-radius);
  line-height: 1.5;
}

/* --- Linux note --- */
.note {
  margin-top: 16px;
  padding: 12px;
  font-size: 0.8125rem;
  color: var(--color-neutral-600);
  background: var(--color-neutral-100);
  border-radius: var(--border-radius);
  line-height: 1.5;
}

.note a {
  color: var(--color-blue-600);
  text-decoration: none;
}

.note a:hover {
  text-decoration: underline;
}

/* --- Loading --- */
.loading {
  display: flex;
  justify-content: center;
  padding: 16px 0;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-neutral-200);
  border-top-color: var(--color-navy-500);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* --- Footer --- */
.login-footer {
  margin-top: 24px;
  font-size: 0.75rem;
  color: var(--color-neutral-500);
  text-align: center;
}

/* --- Responsive --- */
@media (max-width: 480px) {
  .login-card {
    padding: 32px 20px 24px;
  }
}