/* Empty State Styles */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
}

.empty-icon {
  width: 100px;
  height: 100px;
  margin-bottom: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: #999;
}

.empty-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 12px;
}

.empty-message {
  font-size: 1rem;
  color: #666;
  margin-bottom: 24px;
  max-width: 400px;
  line-height: 1.6;
}

/* Form Validation Styles */
.form-group {
  position: relative;
  margin-bottom: 20px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--md-primary, #1565C0);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--md-primary, #1565C0) 10%, transparent);
}

.form-control.is-valid {
  border-color: #28a745;
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2328a745'%3E%3Cpath d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
}

.form-control.is-invalid {
  border-color: #dc3545;
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23dc3545'%3E%3Cpath d='M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
}

.invalid-feedback {
  display: none;
  color: #dc3545;
  font-size: 0.875rem;
  margin-top: 6px;
}

.form-control.is-invalid ~ .invalid-feedback {
  display: block;
}

.valid-feedback {
  display: none;
  color: #28a745;
  font-size: 0.875rem;
  margin-top: 6px;
}

.form-control.is-valid ~ .valid-feedback {
  display: block;
}

/* Password Strength Meter */
.password-strength-meter {
  margin-top: 8px;
  height: 4px;
  background: #e0e0e0;
  border-radius: 2px;
  overflow: hidden;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.password-strength-meter.active {
  opacity: 1;
}

.password-strength-bar {
  height: 100%;
  width: 0%;
  transition: all 0.3s ease;
  border-radius: 2px;
}

.password-strength-text {
  font-size: 0.875rem;
  margin-top: 6px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.password-strength-text.active {
  opacity: 1;
}

/* Improved Focus Indicators */
button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--md-primary, #1565C0);
  outline-offset: 2px;
}

/* Better Mobile Menu */
.mobile-menu-toggle {
  display: none;
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 1001;
  background: white;
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 3px;
  background: var(--md-primary, #1565C0);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translateY(8px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-8px);
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }
  
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  
  .sidebar.active {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
}

/* Table Responsive Wrapper */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.table-responsive::-webkit-scrollbar {
  height: 8px;
}

.table-responsive::-webkit-scrollbar-track {
  background: #f5f5f5;
  border-radius: 4px;
}

.table-responsive::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 4px;
}

.table-responsive::-webkit-scrollbar-thumb:hover {
  background: #999;
}

/* Accessibility Improvements */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--md-primary, #1565C0);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 10001;
}

.skip-to-content:focus {
  top: 0;
}

/* Better Focus Visible (keyboard navigation only) */
*:focus:not(:focus-visible) {
  outline: none;
}

*:focus-visible {
  outline: 2px solid var(--md-primary, #1565C0);
  outline-offset: 2px;
}