/* ==========================================================================
   AUTH UI & PROVIDER BUTTON STYLING
   Modern, Clean Light Theme Default with Dark Mode Support
   ========================================================================== */

.auth-wrapper {
  min-height: calc(100vh - 160px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
}

.auth-card {
  width: 100%;
  max-width: 480px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--card-shadow-hover);
  position: relative;
}

body.theme-dark .auth-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 30px rgba(99, 102, 241, 0.08);
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-header h1 {
  font-size: 1.85rem;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.auth-header p {
  color: var(--text-muted);
  font-size: 0.925rem;
}

/* Auth Tabs */
.auth-tabs {
  display: flex;
  background: #F1F5F9;
  padding: 0.35rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.75rem;
  border: 1px solid var(--border-subtle);
}

body.theme-dark .auth-tabs {
  background: rgba(0, 0, 0, 0.35);
}

.auth-tab {
  flex: 1;
  text-align: center;
  padding: 0.6rem 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  background: transparent;
}

.auth-tab:hover {
  color: var(--text-main);
}

.auth-tab.active {
  background: #FFFFFF;
  color: var(--text-main);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
}

body.theme-dark .auth-tab.active {
  background: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

/* Social Provider Button Grid */
.provider-stack {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.btn-provider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  width: 100%;
  padding: 0.8rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  border: 1px solid transparent;
}

/* Google */
.btn-google {
  background: #FFFFFF;
  color: #1F2937;
  border: 1px solid #CBD5E1;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.btn-google:hover {
  background: #F8FAFC;
  border-color: #94A3B8;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

body.theme-dark .btn-google {
  border-color: #E5E7EB;
}

body.theme-dark .btn-google:hover {
  box-shadow: 0 6px 18px rgba(255, 255, 255, 0.2);
}

/* Apple */
.btn-apple {
  background: #000000;
  color: #FFFFFF;
  border-color: rgba(0, 0, 0, 0.15);
}

.btn-apple:hover {
  background: #18181B;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

/* Meta / Facebook */
.btn-facebook {
  background: #1877F2;
  color: #FFFFFF;
}

.btn-facebook:hover {
  background: #166FE5;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(24, 119, 242, 0.28);
}

/* GitHub */
.btn-github {
  background: #24292E;
  color: #FFFFFF;
  border-color: rgba(0, 0, 0, 0.12);
}

.btn-github:hover {
  background: #1B1F23;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(36, 41, 46, 0.25);
}

/* X / Twitter */
.btn-x {
  background: #0F1419;
  color: #FFFFFF;
  border-color: rgba(0, 0, 0, 0.12);
}

.btn-x:hover {
  background: #20272F;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.provider-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* Divider with Text */
.auth-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 1.5rem 0;
  color: var(--text-dim);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border-subtle);
}

.auth-divider span {
  padding: 0 1rem;
}

/* Form Controls */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 0.45rem;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.95rem;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
  background: #FFFFFF;
}

.form-input::placeholder {
  color: #94A3B8;
}

body.theme-dark .form-input {
  background: rgba(0, 0, 0, 0.35);
  border-color: var(--border-subtle);
  color: #FFFFFF;
}

body.theme-dark .form-input:focus {
  background: rgba(0, 0, 0, 0.55);
}

/* Alert Boxes */
.alert {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.alert-success {
  background: rgba(5, 150, 105, 0.08);
  border: 1px solid rgba(5, 150, 105, 0.25);
  color: #065F46;
}

body.theme-dark .alert-success {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.3);
  color: #6EE7B7;
}

.alert-error {
  background: rgba(225, 29, 72, 0.08);
  border: 1px solid rgba(225, 29, 72, 0.25);
  color: #9F1239;
}

body.theme-dark .alert-error {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
  color: #FCA5A5;
}