/* ============================================================
   auth.css — Login Modal Styles
   Sherpa AI Admin Dashboard
   ============================================================ */

/* ----- Login Overlay ----- */
.auth-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at 50% 40%, rgba(59, 130, 246, 0.06) 0%, rgba(0, 0, 0, 0.55) 100%);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: var(--spacing-xl);
  opacity: 0;
  transition: opacity 300ms ease;
}

.auth-overlay.auth-overlay--active {
  opacity: 1;
}

/* ----- Login Modal Card ----- */
.auth-modal {
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-modal), 0 0 0 1px rgba(255, 255, 255, 0.1);
  width: 100%;
  max-width: 400px;
  position: relative;
  overflow: hidden;
  transform: translateY(20px) scale(0.95);
  opacity: 0;
  transition: transform 300ms ease, opacity 300ms ease;
}

.auth-overlay.auth-overlay--active .auth-modal {
  transform: translateY(0) scale(1);
  opacity: 1;
}

/* Top gradient accent line */
.auth-modal::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #6366f1, #8b5cf6);
  z-index: 1;
}

/* ----- Close Button ----- */
.auth-close {
  position: absolute;
  top: var(--spacing-base);
  right: var(--spacing-base);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  border: none;
  background: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast),
    color var(--transition-fast);
  z-index: 1;
  font-size: 18px;
  line-height: 1;
}

.auth-close:hover {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
}

.auth-close:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ----- Modal Header ----- */
.auth-header {
  padding: var(--spacing-2xl) var(--spacing-2xl) var(--spacing-base);
  text-align: center;
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.auth-logo {
  width: 44px;
  height: 44px;
  margin: 0 auto var(--spacing-base);
  border-radius: var(--radius-md);
  object-fit: contain;
}

.auth-logo-text {
  width: 44px;
  height: 44px;
  margin: 0 auto var(--spacing-base);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-700) 100%);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  font-weight: 700;
}

.auth-header svg {
  color: var(--color-primary);
}

.auth-header h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.auth-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xs);
}

/* ----- Modal Body / Form ----- */
.auth-body {
  padding: var(--spacing-xl) var(--spacing-2xl) var(--spacing-2xl);
}

/* index.html wraps form directly inside .auth-modal (no .auth-body wrapper) */
.auth-modal > form {
  padding: var(--spacing-xl) var(--spacing-2xl) var(--spacing-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-base);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-base);
}

/* Auth-specific form group */
.auth-field {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.auth-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-primary);
}

.auth-input {
  width: 100%;
  height: 44px;
  padding: 0 var(--spacing-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.auth-input::placeholder {
  color: var(--color-text-tertiary);
}

.auth-input:hover {
  border-color: var(--color-text-tertiary);
}

.auth-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.auth-input.error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Password field wrapper */
.auth-password-wrapper {
  position: relative;
}

.auth-password-wrapper .auth-input {
  padding-right: 44px;
}

.auth-password-toggle {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.auth-password-toggle:hover {
  color: var(--color-text-secondary);
}

/* ----- Error Message ----- */
.auth-error {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background-color: var(--color-danger-light);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-md);
  animation: authErrorIn 0.2s ease both;
}

@keyframes authErrorIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.auth-error-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-danger);
  margin-top: 1px;
}

.auth-error-text {
  font-size: var(--font-size-sm);
  color: var(--color-danger-dark);
  line-height: 1.4;
}

.auth-error.hidden {
  display: none;
}

/* ----- Login Button ----- */
.auth-submit {
  width: 100%;
  height: 44px;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  color: var(--color-text-inverse);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
  margin-top: var(--spacing-sm);
  position: relative;
  overflow: hidden;
}

.auth-submit:hover:not(:disabled) {
  opacity: 0.92;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.auth-submit:active:not(:disabled) {
  transform: scale(0.99);
}

.auth-submit:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.auth-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Loading state for submit */
.auth-submit.loading {
  color: transparent;
  pointer-events: none;
}

.auth-submit.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

/* ----- Footer Links ----- */
.auth-footer {
  text-align: center;
  padding-top: var(--spacing-base);
  border-top: 1px solid var(--color-border-light);
  margin-top: var(--spacing-lg);
}

.auth-footer-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.auth-footer-link {
  color: var(--color-primary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.auth-footer-link:hover {
  color: var(--color-primary-hover);
}

/* ----- Divider ----- */
.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-base);
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
  margin: var(--spacing-sm) 0;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--color-border);
}

/* ----- Social Login Button ----- */
.auth-social-btn {
  width: 100%;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: background-color var(--transition-fast),
    border-color var(--transition-fast);
}

.auth-social-btn:hover {
  background-color: var(--color-bg);
  border-color: var(--color-text-tertiary);
}

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

.auth-social-icon {
  width: 18px;
  height: 18px;
}