/* ===== Button Components ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  font-family: var(--font-primary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  user-select: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* Button Sizes */
.btn-small {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.875rem;
}

.btn-medium,
.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 1rem;
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.1rem;
}

.btn-block {
  width: 100%;
}

/* Button Variants */
.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background: var(--dark-surface);
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-success {
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-dark) 100%);
  color: var(--white);
}

.btn-success:hover {
  background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary-color) 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-warning {
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-light) 100%);
  color: var(--white);
}

.btn-warning:hover {
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent-color) 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-danger {
  background: linear-gradient(135deg, var(--error-color) 0%, #dc2626 100%);
  color: var(--white);
}

.btn-danger:hover {
  background: linear-gradient(135deg, #dc2626 0%, var(--error-color) 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: transparent;
  color: var(--dark-text-secondary);
  border: 1px solid var(--dark-border);
}

.btn-ghost:hover {
  background: var(--dark-surface);
  border-color: var(--dark-border-light);
  color: var(--dark-text-primary);
}


/* ===== Form Components ===== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  font-weight: var(--font-weight-medium);
  color: var(--dark-text-secondary);
  margin-bottom: var(--spacing-sm);
  font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--dark-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-primary);
  background: var(--dark-surface);
  color: var(--dark-text-primary);
  transition: all var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input:invalid:not(:placeholder-shown),
.form-group select:invalid:not(:placeholder-shown),
.form-group textarea:invalid:not(:placeholder-shown) {
  border-color: var(--error-color);
}

.form-group input:valid:not(:placeholder-shown),
.form-group select:valid:not(:placeholder-shown),
.form-group textarea:valid:not(:placeholder-shown) {
  border-color: var(--success-color);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--dark-text-tertiary);
}

.form-group select {
  background-image: url("data:image/svg+xml;charset=utf-8,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%23cbd5e1' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 3rem;
  appearance: none;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Password Input */
.password-input {
  position: relative;
}

.password-input input {
  padding-right: 3rem;
}

.password-toggle {
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--dark-text-tertiary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

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

/* Form Validation */
.form-error {
  color: var(--error-color);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  display: none;
}

.form-group.error .form-error {
  display: block;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
  border-color: var(--error-color);
}

.form-success {
  color: var(--success-color);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  display: none;
}

.form-group.success .form-success {
  display: block;
}

.form-group.success input,
.form-group.success select,
.form-group.success textarea {
  border-color: var(--success-color);
}

/* Form Footer */
.form-footer {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--dark-border);
}

.form-footer p {
  color: var(--dark-text-secondary);
  margin: 0;
}

.form-footer a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

.form-footer a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* ===== Card Components ===== */
.card {
  background: var(--dark-surface);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  background: var(--dark-surface-hover);
}

.card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--dark-border);
  background: var(--dark-bg-secondary);
}

.card-title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  color: var(--dark-text-primary);
  margin: 0;
}

.card-body {
  padding: var(--spacing-lg);
}

.card-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--dark-border);
  background: var(--dark-bg-secondary);
}

/* ===== Alert Components ===== */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.alert-success {
  background: rgba(34, 197, 94, 0.1);
  border-color: var(--success-color);
  color: #4ade80;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: var(--warning-color);
  color: #fbbf24;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--error-color);
  color: #f87171;
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--info-color);
  color: #60a5fa;
}

.alert i {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.alert-close {
  margin-left: auto;
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.alert-close:hover {
  opacity: 1;
}

/* ===== Badge Components ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary {
  background: var(--primary-color);
  color: var(--white);
}

.badge-secondary {
  background: var(--dark-border);
  color: var(--dark-text-secondary);
}

.badge-success {
  background: var(--success-color);
  color: var(--white);
}

.badge-warning {
  background: var(--warning-color);
  color: var(--white);
}

.badge-danger {
  background: var(--error-color);
  color: var(--white);
}

/* ===== Progress Components ===== */
.progress-container {
  background: var(--dark-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 8px;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  border-radius: var(--radius-md);
  transition: width var(--transition-slow);
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}


/* ===== Dashboard Components ===== */
.dashboard-card {
  background: var(--dark-surface);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.dashboard-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  background: var(--dark-surface-hover);
}

.dashboard-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--dark-border);
}

.dashboard-card-title {
  font-size: 1.1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--dark-text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.dashboard-card-title i {
  color: var(--primary-color);
}

.dashboard-stat {
  text-align: center;
}

.dashboard-stat-value {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.dashboard-stat-label {
  color: var(--dark-text-secondary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== Navigation Components ===== */
.nav-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  position: relative;
}

.nav-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--primary-color);
  object-fit: cover;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-user-avatar:hover {
  transform: scale(1.05);
  border-color: var(--primary-dark);
}

.nav-user-dropdown {
  position: absolute;
  top: calc(100% + var(--spacing-sm));
  right: 0;
  background: var(--dark-surface);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  padding: var(--spacing-sm) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: 1000;
}

.nav-user-dropdown.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-user-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--dark-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.nav-user-dropdown-item:hover {
  background: var(--dark-surface-hover);
  color: var(--primary-color);
}

.nav-user-dropdown-item.danger:hover {
  background: var(--dark-surface-hover);
  color: var(--error-color);
}

.nav-user-dropdown-divider {
  height: 1px;
  background: var(--dark-border);
  margin: var(--spacing-sm) 0;
}

/* ===== Responsive Utilities ===== */
.hide-mobile {
  display: block;
}

.show-mobile {
  display: none;
}

@media (max-width: 768px) {
  .hide-mobile {
    display: none;
  }
  
  .show-mobile {
    display: block;
  }
  
  .btn-large {
    padding: var(--spacing-md);
    font-size: 1rem;
  }
  
  .dashboard-stat-value {
    font-size: 2rem;
  }
  
  .nav-user-dropdown {
    right: auto;
    left: 0;
  }
}

/* ===== Animation Utilities ===== */
.fade-in {
  animation: fadeIn var(--transition-normal) ease-out;
}

.slide-in-up {
  animation: slideInUp var(--transition-normal) ease-out;
}

.slide-in-down {
  animation: slideInDown var(--transition-normal) ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Focus styles for accessibility */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.btn:focus,
input:focus,
select:focus,
textarea:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}