/**
 * OAuth Login Page Styles
 * Beautiful, modern, mobile-first
 */

/* ==================== LOGIN CONTAINER ==================== */
.pb-login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--pb-space-lg);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  position: relative;
  overflow: hidden;
}

/* Animated Background Particles */
.pb-login-wrapper::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: pb-particle-move 20s linear infinite;
}

@keyframes pb-particle-move {
  0% { transform: translate(0, 0); }
  100% { transform: translate(50px, 50px); }
}

.pb-login-container {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: var(--pb-bg-secondary);
  border: 1px solid var(--pb-border);
  border-radius: var(--pb-radius-xl);
  padding: var(--pb-space-2xl);
  box-shadow: var(--pb-shadow-xl);
  animation: pb-scale-in 0.4s ease-out;
}

/* ==================== LOGO & HEADER ==================== */
.pb-login-logo {
  text-align: center;
  margin-bottom: var(--pb-space-xl);
}

.pb-login-logo-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--pb-space-md);
  background: linear-gradient(135deg, var(--pb-primary), var(--pb-primary-hover));
  border-radius: var(--pb-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  animation: pb-logo-pulse 2s ease-in-out infinite;
}

@keyframes pb-logo-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.pb-login-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--pb-text-primary);
  margin-bottom: var(--pb-space-xs);
}

.pb-login-subtitle {
  color: var(--pb-text-secondary);
  font-size: 0.875rem;
}

/* ==================== OAUTH BUTTONS ==================== */
.pb-oauth-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--pb-space-md);
  margin-bottom: var(--pb-space-xl);
}

.pb-oauth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--pb-space-md);
  padding: 12px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  border: 2px solid var(--pb-border);
  border-radius: var(--pb-radius-md);
  background: var(--pb-bg-primary);
  color: var(--pb-text-primary);
  cursor: pointer;
  transition: all var(--pb-transition-fast);
  text-decoration: none;
}

.pb-oauth-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--pb-shadow-md);
}

.pb-oauth-btn-google:hover { border-color: #4285f4; }
.pb-oauth-btn-github:hover { border-color: #333; }
.pb-oauth-btn-microsoft:hover { border-color: #00a4ef; }
.pb-oauth-btn-email:hover { 
  border-color: var(--pb-primary); 
  background: var(--pb-bg-hover);
}

.pb-oauth-icon {
  width: 20px;
  height: 20px;
}

/* ==================== DIVIDER ==================== */
.pb-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: var(--pb-space-xl) 0;
  color: var(--pb-text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.pb-divider::before { margin-right: var(--pb-space-md); }
.pb-divider::after { margin-left: var(--pb-space-md); }

/* ==================== LOGIN FORM ==================== */
.pb-login-form {
  display: flex;
  flex-direction: column;
  gap: var(--pb-space-md);
}

.pb-form-group {
  display: flex;
  flex-direction: column;
  gap: var(--pb-space-xs);
}

.pb-form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--pb-text-secondary);
}

.pb-form-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.875rem;
  background: var(--pb-bg-primary);
  border: 2px solid var(--pb-border);
  border-radius: var(--pb-radius-md);
  color: var(--pb-text-primary);
  transition: all var(--pb-transition-fast);
}

.pb-form-input:focus {
  outline: none;
  border-color: var(--pb-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.pb-form-input::placeholder {
  color: var(--pb-text-muted);
}

/* ==================== LOGIN EXTRAS ==================== */
.pb-login-extras {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--pb-space-sm);
  font-size: 0.875rem;
}

.pb-remember-me {
  display: flex;
  align-items: center;
  gap: var(--pb-space-xs);
  cursor: pointer;
  color: var(--pb-text-secondary);
}

.pb-remember-me input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.pb-forgot-password {
  color: var(--pb-primary);
  font-weight: 600;
  transition: color var(--pb-transition-fast);
}

.pb-forgot-password:hover {
  color: var(--pb-primary-hover);
}

/* ==================== SUBMIT BUTTON ==================== */
.pb-login-submit {
  margin-top: var(--pb-space-md);
  padding: 14px;
  font-size: 1rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--pb-primary), var(--pb-primary-hover));
  color: white;
  border: none;
  border-radius: var(--pb-radius-md);
  cursor: pointer;
  transition: all var(--pb-transition-fast);
  position: relative;
  overflow: hidden;
}

.pb-login-submit::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.pb-login-submit:hover::before {
  width: 300px;
  height: 300px;
}

.pb-login-submit:hover {
  transform: translateY(-2px);
  box-shadow: var(--pb-shadow-lg);
}

.pb-login-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.pb-login-submit span {
  position: relative;
  z-index: 1;
}

/* ==================== STATUS MESSAGE ==================== */
.pb-login-status {
  margin-top: var(--pb-space-md);
  padding: var(--pb-space-md);
  border-radius: var(--pb-radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  text-align: center;
  animation: pb-slide-down 0.3s ease-out;
}

.pb-login-status.success {
  background: var(--pb-success-light);
  color: var(--pb-success);
  border: 1px solid var(--pb-success);
}

.pb-login-status.error {
  background: var(--pb-danger-light);
  color: var(--pb-danger);
  border: 1px solid var(--pb-danger);
}

.pb-login-status.info {
  background: var(--pb-info-light);
  color: var(--pb-info);
  border: 1px solid var(--pb-info);
}

/* ==================== FOOTER ==================== */
.pb-login-footer {
  margin-top: var(--pb-space-xl);
  text-align: center;
  color: var(--pb-text-muted);
  font-size: 0.75rem;
}

.pb-login-footer a {
  color: var(--pb-primary);
  font-weight: 600;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 480px) {
  .pb-login-container {
    padding: var(--pb-space-lg);
  }
  
  .pb-login-title {
    font-size: 1.5rem;
  }
  
  .pb-oauth-btn {
    padding: 10px 16px;
    font-size: 0.8125rem;
  }
}

/* ==================== LOADING OVERLAY ==================== */
.pb-login-loading {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--pb-radius-xl);
  z-index: 10;
  animation: pb-fade-in 0.2s ease-out;
}

/* Hidden state - higher specificity */
.pb-login-loading.pb-hidden {
  display: none;
}

.pb-login-loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top-color: white;
  border-radius: 50%;
  animation: pb-spin 0.8s linear infinite;
}

/* ==================== ANIMATIONS ==================== */
@keyframes pb-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pb-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pb-scale-in {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes pb-slide-down {
  from { transform: translateY(-10px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}