/* ==================== BUTTONS ==================== */
.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  font-weight: var(--fw-semibold);
  text-align: center;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  font-size: var(--fs-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

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

.btn-outline:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background: #3da862;
  border-color: #3da862;
  transform: translateY(-2px);
}

/* Button with icon */
.btn-icon {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}

.btn-icon i {
  font-size: var(--fs-lg);
}

/* Button group */
.btn-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ==================== CARDS ==================== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.card-header {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  color: var(--text-primary);
  font-size: var(--fs-xl);
  margin-bottom: var(--space-sm);
}

.card-subtitle {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
}

.card-body {
  color: var(--text-secondary);
  line-height: 1.8;
}

.card-footer {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-color);
}

/* ==================== BADGES ==================== */
.badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

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

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

.badge-outline {
  background: transparent;
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
}

/* ==================== PROGRESS BARS ==================== */
.progress {
  height: 10px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  border-radius: var(--radius-full);
  transition: width 1s ease-in-out;
  position: relative;
  overflow: hidden;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: shimmer 2s infinite;
}

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

/* ==================== TOOLTIPS ==================== */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip-text {
  visibility: hidden;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  text-align: center;
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  position: absolute;
  z-index: var(--z-tooltip);
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: var(--fs-sm);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.tooltip-text::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 5px;
  border-style: solid;
  border-color: var(--bg-tertiary) transparent transparent transparent;
}

.tooltip:hover .tooltip-text {
  visibility: visible;
  opacity: 1;
}

/* ==================== MODALS ==================== */
.modal {
  display: none;
  position: fixed;
  z-index: var(--z-modal);
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  animation: fadeIn var(--transition-base);
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp var(--transition-base);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  color: var(--text-primary);
  font-size: var(--fs-2xl);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: var(--fs-2xl);
  cursor: pointer;
  transition: color var(--transition-base);
}

.modal-close:hover {
  color: var(--text-primary);
}

/* ==================== LOADERS ==================== */
.loader {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid var(--bg-tertiary);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loader-dots {
  display: flex;
  gap: var(--space-sm);
}

.loader-dot {
  width: 12px;
  height: 12px;
  background: var(--primary-color);
  border-radius: 50%;
  animation: pulse 1.5s ease-in-out infinite;
}

.loader-dot:nth-child(2) {
  animation-delay: 0.2s;
}

.loader-dot:nth-child(3) {
  animation-delay: 0.4s;
}

/* ==================== BACK TO TOP ==================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xl);
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: var(--z-fixed);
}

.back-to-top.active {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-5px);
}

/* ==================== ALERTS ==================== */
.alert {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  animation: slideInLeft var(--transition-base);
}

.alert-success {
  background: rgba(72, 187, 120, 0.1);
  border: 1px solid var(--secondary-color);
  color: var(--secondary-color);
}

.alert-error {
  background: rgba(245, 101, 101, 0.1);
  border: 1px solid #f56565;
  color: #f56565;
}

.alert-warning {
  background: rgba(237, 137, 54, 0.1);
  border: 1px solid var(--accent-color);
  color: var(--accent-color);
}

.alert-info {
  background: rgba(102, 126, 234, 0.1);
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
}

.alert i {
  font-size: var(--fs-xl);
}

/* ==================== FORM ELEMENTS ==================== */
.form-control {
  width: 100%;
  padding: var(--space-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  transition: all var(--transition-base);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

.form-helper {
  margin-top: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.form-error {
  color: #f56565;
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 20px;
  height: 20px;
  accent-color: var(--primary-color);
  cursor: pointer;
}

.form-check label {
  cursor: pointer;
  color: var(--text-secondary);
}

/* ==================== TABLES ==================== */
.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table thead {
  background: var(--bg-tertiary);
}

.table th {
  padding: var(--space-md);
  text-align: left;
  color: var(--text-primary);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  font-size: var(--fs-sm);
  letter-spacing: 1px;
}

.table td {
  padding: var(--space-md);
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
}

.table tbody tr:hover {
  background: var(--bg-hover);
}

/* ==================== UTILITY ANIMATIONS ==================== */
.fade-in {
  animation: fadeIn var(--transition-base);
}

.slide-in-left {
  animation: slideInLeft var(--transition-base);
}

.slide-in-right {
  animation: slideInRight var(--transition-base);
}

.scale-in {
  animation: scaleIn var(--transition-base);
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ==================== 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 keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}