.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-weight: var(--font-medium);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  transition: all var(--transition-fast);
  border: 2px solid transparent;
  white-space: nowrap;
  text-decoration: none;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

.btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-xl);
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
  text-decoration: none;
}

.btn-primary:active:not(:disabled) {
  background-color: var(--color-primary-dark);
  transform: scale(0.98);
}

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

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
  color: var(--color-primary-dark);
  text-decoration: none;
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
}

.btn-outline-secondary {
  background-color: transparent;
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.btn-outline-secondary:hover:not(:disabled) {
  background-color: var(--color-secondary);
  color: var(--color-primary-dark);
  text-decoration: none;
}

.btn-outline-light {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--color-white);
  color: var(--color-white);
}

.btn-outline-light:hover:not(:disabled) {
  background-color: var(--color-white);
  border-color: var(--color-white);
  color: var(--color-primary-dark);
  text-decoration: none;
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-primary);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--bg-tertiary);
  text-decoration: none;
}

.btn-link {
  background-color: transparent;
  color: var(--text-link);
  padding: var(--space-1) 0;
  border: none;
}

.btn-link:hover:not(:disabled) {
  text-decoration: underline;
  color: var(--text-link-hover);
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.card-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-gray-200);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-gray-200);
  background: var(--bg-secondary);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  line-height: 1;
}

.badge-primary {
  background-color: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
}

.badge-secondary {
  background-color: rgba(var(--color-secondary-rgb), 0.1);
  color: var(--color-secondary);
}

.badge-success {
  background-color: rgba(var(--color-success-rgb), 0.1);
  color: var(--color-success);
}

.badge-warning {
  background-color: rgba(243, 156, 18, 0.1);
  color: var(--color-warning);
}

.badge-error {
  background-color: rgba(var(--color-error-rgb), 0.1);
  color: var(--color-error);
}

.alert {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.alert-icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.125rem;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.alert-message {
  font-size: var(--text-sm);
  margin-bottom: 0;
}

.alert-success {
  background-color: rgba(var(--color-success-rgb), 0.1);
  border: 1px solid rgba(var(--color-success-rgb), 0.2);
  color: var(--color-success-dark);
}

.alert-error {
  background-color: rgba(var(--color-error-rgb), 0.1);
  border: 1px solid rgba(var(--color-error-rgb), 0.2);
  color: var(--color-error-dark);
}

.alert-warning {
  background-color: rgba(243, 156, 18, 0.1);
  border: 1px solid rgba(243, 156, 18, 0.2);
  color: #9A6B00;
}

.alert-info {
  background-color: rgba(var(--color-primary-rgb), 0.1);
  border: 1px solid rgba(var(--color-primary-rgb), 0.2);
  color: var(--color-primary-dark);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-weight: var(--font-medium);
  margin-bottom: var(--space-2);
  color: var(--text-primary);
  font-size: var(--text-sm);
}

.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}

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

.form-input:disabled {
  background: var(--bg-secondary);
  cursor: not-allowed;
}

.form-input.error {
  border-color: var(--color-error);
}

.form-input.error:focus {
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.4);
}

.form-error {
  display: block;
  color: var(--color-error);
  font-size: var(--text-sm);
  margin-top: var(--space-1);
}

.form-hint {
  display: block;
  color: var(--text-tertiary);
  font-size: var(--text-sm);
  margin-top: var(--space-1);
}

.form-row {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.form-check-input {
  flex-shrink: 0;
  width: 1.125rem;
  height: 1.125rem;
  margin-top: 0.125rem;
  accent-color: var(--color-primary);
  border-radius: var(--radius-sm);
}

.form-check-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
  line-height: var(--leading-relaxed);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right var(--space-3) center;
  background-repeat: no-repeat;
  background-size: 1.5rem 1.5rem;
  padding-right: var(--space-10);
}

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

.input-group {
  display: flex;
}

.input-group .form-input {
  border-radius: 0;
  border-right: none;
}

.input-group .form-input:first-child {
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
}

.input-group .btn {
  border-radius: 0;
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-cols-4,
  .grid-cols-3,
  .grid-cols-2 { grid-template-columns: 1fr; }
}

.flex {
  display: flex;
}

.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

.top-0 { top: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.left-0 { left: 0; }

.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }
.bg-tertiary { background-color: var(--bg-tertiary); }
.bg-dark { background-color: var(--bg-dark); }
.bg-white { background-color: var(--color-white); }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-white { color: var(--color-white); }
.text-accent { color: var(--color-primary); }
.text-gold { color: var(--color-secondary); }

.font-heading { font-family: var(--font-heading); }
.font-body { font-family: var(--font-body); }
.font-bold { font-weight: var(--font-bold); }
.font-semibold { font-weight: var(--font-semibold); }
.font-medium { font-weight: var(--font-medium); }
.font-normal { font-weight: var(--font-normal); }

.leading-tight { line-height: var(--leading-tight); }
.leading-normal { line-height: var(--leading-normal); }
.leading-relaxed { line-height: var(--leading-relaxed); }

.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mt-auto { margin-top: auto; }
.mb-auto { margin-bottom: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-auto { margin-top: auto; margin-bottom: auto; }

.p-0 { padding: 0; }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }

.block { display: block; }
.inline-block { display: inline-block; }
.inline-flex { display: inline-flex; }
.hidden { display: none; }

@media (max-width: 768px) {
  .mobile-hidden { display: none !important; }
  .mobile-block { display: block !important; }
  .mobile-flex { display: flex !important; }
  .mobile-grid { display: grid !important; }
}

@media (min-width: 769px) {
  .desktop-hidden { display: none !important; }
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.whitespace-nowrap { white-space: nowrap; }

.object-cover { object-fit: cover; }
.object-contain { object-fit: contain; }

.aspect-square { aspect-ratio: 1 / 1; }
.aspect-video { aspect-ratio: 16 / 9; }
.aspect-photo { aspect-ratio: 4 / 3; }

.transition { transition: all var(--transition-normal); }
.transition-fast { transition: all var(--transition-fast); }
.transition-slow { transition: all var(--transition-slow); }

.transform { transform: translateZ(0); }
.hover-scale:hover { transform: scale(1.02); }
.hover-lift:hover { transform: translateY(-4px); }

.animate-fade-in {
  animation: fadeIn var(--transition-normal) ease-out;
}

.animate-slide-up {
  animation: slideUp var(--transition-slow) ease-out;
}

.animate-slide-down {
  animation: slideDown var(--transition-slow) ease-out;
}

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

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

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

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

.animate-spin {
  animation: spin 1s linear infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}