/* ============================================================
   SkillBridge - Auth Stylesheet (auth.css)
   Login, Signup pages - split-screen layout
   ============================================================ */

/* ── Auth Page Layout ───────────────────────────────────────── */
.auth-page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

/* ── Left Branding Panel ────────────────────────────────────── */
.auth-brand {
  background: linear-gradient(145deg, var(--primary-dark) 0%, var(--primary) 50%, #2563EB 100%);
  padding: var(--space-12) var(--space-10);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  color: var(--white);
}

/* Decorative circles */
.auth-brand::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  pointer-events: none;
}

.auth-brand::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -60px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  pointer-events: none;
}

.auth-brand__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--white);
  text-decoration: none;
  position: relative;
  z-index: 1;
}

.auth-brand__logo-icon {
  width: 40px;
  height: 40px;
  background: transparent;
  border-radius: 0;
  display: block;
  object-fit: contain;
}

/* Main content */
.auth-brand__content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-8) 0;
  position: relative;
  z-index: 1;
}

.auth-brand__tagline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
  width: fit-content;
}

.auth-brand__tagline span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ADE80;
  display: inline-block;
}

.auth-brand__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: var(--font-extrabold);
  line-height: 1.15;
  margin-bottom: var(--space-5);
}

.auth-brand__desc {
  font-size: var(--text-base);
  opacity: 0.75;
  line-height: 1.75;
  max-width: 360px;
  margin-bottom: var(--space-8);
}

/* Feature pills */
.auth-brand__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.auth-brand__feature {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: rgba(255,255,255,0.1);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.08);
}

.auth-brand__feature-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

/* Testimonial */
.auth-brand__testimonial {
  position: relative;
  z-index: 1;
}

.auth-brand__quote {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-xl);
  padding: var(--space-5) var(--space-6);
  backdrop-filter: blur(4px);
}

.auth-brand__quote-text {
  font-size: var(--text-sm);
  opacity: 0.9;
  line-height: 1.7;
  margin-bottom: var(--space-4);
  font-style: italic;
}

.auth-brand__quote-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.auth-brand__quote-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: var(--font-bold);
  flex-shrink: 0;
}

.auth-brand__quote-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
}

.auth-brand__quote-role {
  font-size: var(--text-xs);
  opacity: 0.65;
}

/* ── Right Form Panel ───────────────────────────────────────── */
.auth-form-panel {
  background: var(--white);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-12) var(--space-12);
  overflow-y: auto;
}

.auth-form-panel__back {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--gray-500);
  text-decoration: none;
  margin-bottom: var(--space-8);
  transition: color var(--transition-fast);
  width: fit-content;
}

.auth-form-panel__back:hover { color: var(--primary); }

.auth-form-header {
  margin-bottom: var(--space-8);
}

.auth-form-header__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--font-extrabold);
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.auth-form-header__sub {
  font-size: var(--text-base);
  color: var(--gray-500);
  line-height: 1.6;
}

/* Role selector (signup) */
.role-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.role-option {
  position: relative;
}

.role-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.role-option__label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-5) var(--space-4);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.role-option__label:hover {
  border-color: var(--primary);
  background: var(--primary-xlight);
}

.role-option input:checked + .role-option__label {
  border-color: var(--primary);
  background: var(--primary-xlight);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.role-option__icon {
  font-size: 1.75rem;
}

.role-option__title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--gray-700);
}

.role-option__sub {
  font-size: var(--text-xs);
  color: var(--gray-400);
}

/* Form */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.auth-form .form-group { margin-bottom: 0; }

.auth-form .form-label {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--gray-700);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.auth-form .form-input {
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  color: var(--gray-800);
  transition: all var(--transition-fast);
  width: 100%;
}

.auth-form .form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
  outline: none;
}

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

.auth-form .form-input::placeholder { color: var(--gray-400); }

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

.password-field .form-input {
  padding-right: 48px;
}

.password-toggle {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gray-400);
  font-size: 1rem;
  padding: var(--space-1);
  transition: color var(--transition-fast);
}

.password-toggle:hover { color: var(--gray-600); }

/* Password strength */
.password-strength {
  margin-top: var(--space-2);
}

.password-strength__bar {
  height: 4px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-1);
}

.password-strength__fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  width: 0%;
}

.password-strength__fill.weak   { background: var(--danger);  width: 33%; }
.password-strength__fill.medium { background: var(--warning); width: 66%; }
.password-strength__fill.strong { background: var(--success); width: 100%; }

.password-strength__label {
  font-size: var(--text-xs);
  color: var(--gray-500);
}

/* Form row (two-col) */
.auth-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

/* Select */
.auth-form .form-select {
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  color: var(--gray-800);
  background: var(--white);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 14px;
  padding-right: 36px;
  width: 100%;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-form .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
  outline: none;
}

/* Remember me / Terms */
.auth-check-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-sm);
}

.auth-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  color: var(--gray-600);
}

.auth-check input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.auth-check__link {
  color: var(--primary);
  text-decoration: none;
  font-weight: var(--font-medium);
}

.auth-check__link:hover { text-decoration: underline; }

.auth-forgot {
  color: var(--primary);
  text-decoration: none;
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
  transition: opacity var(--transition-fast);
}

.auth-forgot:hover { opacity: 0.8; }

/* Submit button */
.auth-submit {
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  width: 100%;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-blue);
  margin-top: var(--space-2);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.auth-submit:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37,99,235,0.35);
}

.auth-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.auth-submit__spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.auth-submit.loading .auth-submit__spinner { display: block; }
.auth-submit.loading .auth-submit__text { display: none; }

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

/* Divider */
.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-2) 0;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--gray-200);
}

.auth-divider span {
  font-size: var(--text-xs);
  color: var(--gray-400);
  font-weight: var(--font-medium);
  white-space: nowrap;
}

/* Social buttons */
.auth-social-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.auth-social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--gray-700);
  background: var(--white);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-social-btn:hover {
  background: var(--gray-50);
  border-color: var(--gray-300);
}

.auth-social-btn__icon {
  font-size: 1.1rem;
}

.auth-social-btn--google .auth-social-btn__icon { color: #EA4335; }
.auth-social-btn--linkedin .auth-social-btn__icon { color: #0A66C2; }

/* Bottom link */
.auth-bottom {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--gray-500);
  margin-top: var(--space-5);
}

.auth-bottom a {
  color: var(--primary);
  font-weight: var(--font-semibold);
  text-decoration: none;
}

.auth-bottom a:hover { text-decoration: underline; }

/* Error message */
.auth-error {
  background: #FEF2F2;
  border: 1px solid #FECACA;
  color: #DC2626;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  display: none;
}

.auth-error.visible { display: block; }

.auth-success {
  background: #ECFDF5;
  border: 1px solid #A7F3D0;
  color: #059669;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  display: none;
}

.auth-success.visible { display: block; }

/* Field-level error */
.field-error {
  font-size: var(--text-xs);
  color: var(--danger);
  margin-top: var(--space-1);
  display: none;
}

.field-error.visible { display: block; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  .auth-page { grid-template-columns: 1fr; min-height: 100vh; }
  .auth-brand { display: none; }
  .auth-form-panel {
    padding: var(--space-8) var(--space-6);
    justify-content: flex-start;
    padding-top: calc(var(--navbar-height, 64px) + var(--space-8));
    min-height: 100vh;
  }
}

@media (max-width: 767px) {
  .auth-form-panel {
    padding: var(--space-6) var(--space-5);
    padding-top: var(--space-8);
  }
  .auth-form-header__title { font-size: clamp(1.4rem, 6vw, 1.875rem); }
  .auth-submit { min-height: 48px; font-size: var(--text-base); }
  .role-selector { grid-template-columns: 1fr 1fr; gap: var(--space-2); }
  .role-option__label { padding: var(--space-4) var(--space-3); }
  .auth-form .form-input { min-height: 44px; }
}

@media (max-width: 480px) {
  .auth-form-panel { padding: var(--space-5) var(--space-4); padding-top: var(--space-6); }
  .auth-social-btns { grid-template-columns: 1fr; }
  .auth-form .form-row { grid-template-columns: 1fr; }
  .role-selector { grid-template-columns: 1fr; }
  .auth-form-header__title { font-size: 1.5rem; }
  .auth-social-btn { min-height: 44px; }
  .auth-form-panel__back { margin-bottom: var(--space-5); }
}