/* ==========================================================================
   Components Stylesheet - 재사용 가능한 UI 컴포넌트들
   ========================================================================== */

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  
  /* Default size */
  padding: var(--space-3) var(--space-6);
  min-height: 44px; /* Touch-friendly */
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  min-height: 36px;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
  min-height: 52px;
}

.btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--font-size-xl);
  min-height: 60px;
}

/* Button Variants */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  font-family: 'Pretendard', sans-serif;
  font-size: var(--font-size-base);
  letter-spacing: 0.3px;
  font-weight: 600;
}

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

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

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

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

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

.btn-secondary:hover {
  background: #E08900; /* Darker orange */
  border-color: #E08900;
  color: var(--color-white);
}

.btn-ghost {
  background: transparent;
  color: var(--color-gray-700);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
}

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

.btn:disabled:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
}

/* Icon Buttons */
.btn-icon {
  padding: var(--space-3);
  min-width: 44px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
}

.btn-icon svg {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
}

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

.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-6);
  background: var(--color-gray-50);
  border-top: 1px solid var(--color-gray-200);
}

/* Elevated Card */
.card-elevated {
  box-shadow: var(--shadow-md);
  border: none;
}

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

/* ==========================================================================
   Badges & Tags
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

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

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

.badge-outline {
  background: transparent;
  color: var(--color-gray-700);
  border: 1px solid var(--color-gray-300);
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-900);
  margin-bottom: var(--space-2);
}

.form-label.required::after {
  content: ' *';
  color: #EF4444; /* Red */
}

.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-gray-900);
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  min-height: 44px;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.form-control::placeholder {
  color: var(--color-gray-500);
}

.form-control:disabled {
  background: var(--color-gray-100);
  color: var(--color-gray-500);
  cursor: not-allowed;
}

.form-select {
  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: 16px 12px;
  padding-right: var(--space-10);
  appearance: none;
}

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

.form-error {
  color: #EF4444;
  font-size: var(--font-size-sm);
  margin-top: var(--space-2);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.form-check-input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-primary);
}

.form-check-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  line-height: var(--line-height-normal);
  cursor: pointer;
}

/* ==========================================================================
   Loading & States
   ========================================================================== */

.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-gray-300);
  border-radius: 50%;
  border-top-color: var(--color-primary);
  animation: spin 1s ease-in-out infinite;
}

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

.loading-lg {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

/* Loading Overlay */
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

/* ==========================================================================
   Alerts & Notifications
   ========================================================================== */

.alert {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  margin-bottom: var(--space-4);
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--color-success);
  color: #065F46; /* Dark green */
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: #EF4444;
  color: #991B1B; /* Dark red */
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: var(--color-secondary);
  color: #92400E; /* Dark orange */
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* ==========================================================================
   Modal & Overlay
   ========================================================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  max-width: 90vw;
  max-height: 90vh;
  overflow: auto;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: var(--font-size-xl);
  color: var(--color-gray-900);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--color-gray-500);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
}

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

.modal-footer {
  padding: var(--space-6);
  border-top: 1px solid var(--color-gray-200);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-4);
}

/* ==========================================================================
   Tooltips
   ========================================================================== */

.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: 1000;
  margin-bottom: var(--space-2);
}

.tooltip::after {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--color-gray-900);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.tooltip:hover::before,
.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
}

/* ==========================================================================
   Progress Indicators
   ========================================================================== */

.progress {
  width: 100%;
  height: 8px;
  background: var(--color-gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-md);
  transition: width var(--transition-normal);
}

.progress-lg {
  height: 12px;
}

.progress-sm {
  height: 4px;
}

/* ==========================================================================
   Dividers
   ========================================================================== */

.divider {
  height: 1px;
  background: var(--color-gray-200);
  margin: var(--space-8) 0;
}

.divider-vertical {
  width: 1px;
  height: 100%;
  background: var(--color-gray-200);
  margin: 0 var(--space-4);
}

.divider-text {
  position: relative;
  text-align: center;
  margin: var(--space-8) 0;
}

.divider-text::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-gray-200);
}

.divider-text span {
  background: var(--color-white);
  padding: 0 var(--space-4);
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Animations & Transitions
   ========================================================================== */

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

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

.scale-in {
  animation: scaleIn var(--transition-normal) 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 scaleIn {
  from { 
    opacity: 0; 
    transform: scale(0.95); 
  }
  to { 
    opacity: 1; 
    transform: scale(1); 
  }
}

/* ==========================================================================
   Utilities
   ========================================================================== */

/* Visibility */
.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;
}

.hidden {
  display: none !important;
}

.invisible {
  visibility: hidden;
}

/* Positioning */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Z-index */
.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 */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* User Select */
.select-none { user-select: none; }
.select-text { user-select: text; }
.select-all { user-select: all; }

/* Pointer Events */
.pointer-events-none { pointer-events: none; }
.pointer-events-auto { pointer-events: auto; }

/* Cursor */
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }
.cursor-move { cursor: move; }