/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* CSS Variables for consistent theming */
:root {
  --primary-gradient: linear-gradient(135deg, #667eea, #764ba2);
  --surface-gradient: linear-gradient(135deg, #f8fafc, #f1f5f9);
  --background-light: linear-gradient(135deg, #f0f4ff, #e0e7ff);
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-light: rgba(148, 163, 184, 0.1);
  --shadow-light: rgba(0, 0, 0, 0.08);
  --shadow-medium: rgba(0, 0, 0, 0.15);
  --primary-shadow: rgba(102, 126, 234, 0.3);
  --border-radius: 16px;
  --border-radius-sm: 12px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Goals Card */
.goals-card {
  background: white;
  border-radius: var(--border-radius);
  padding: 32px;
  margin: 20px;
  box-shadow: 0 10px 25px var(--shadow-light);
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.goals-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 50px var(--shadow-medium);
}

/* Card Header */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.card-title {
  font-size: clamp(20px, 4vw, 24px);
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Add Button */
.add-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-sm);
  border: none;
  background: var(--primary-gradient);
  color: white;
  font-size: 20px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: 0 4px 12px var(--primary-shadow);
}

.add-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

.add-btn:active {
  transform: scale(0.95);
}

/* Goal Items */
.goal-item {
  background: var(--surface-gradient);
  border-radius: var(--border-radius);
  padding: 20px;
  margin-bottom: var(--spacing-md);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.goal-item:hover {
  transform: translateX(4px);
  box-shadow: 0 8px 25px var(--shadow-light);
}

.goal-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 4px;
  background: var(--primary-gradient);
  transition: width 0.3s ease;
}

.goal-item:hover::before {
  width: 6px;
}

/* Goal Header & Content */
.goal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.goal-title {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 16px;
}

.goal-amount {
  font-weight: 700;
  color: #667eea;
  font-size: 14px;
}

/* Progress Components */
.progress-container {
  margin: 12px 0;
}

.progress-bar {
  height: 8px;
  background: #e2e8f0;
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: var(--primary-gradient);
  border-radius: 6px;
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  inset: 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%); }
}

.progress-text {
  display: flex;
  justify-content: space-between;
  margin-top: var(--spacing-sm);
  font-size: 12px;
  color: var(--text-secondary);
}

/* Summary Section */
.summary {
  margin-top: var(--spacing-lg);
  padding: 20px;
  background: var(--background-light);
  border-radius: var(--border-radius);
  border: 1px solid rgba(102, 126, 234, 0.1);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-md);
}

.summary-item {
  text-align: center;
}

.summary-value {
  font-size: clamp(18px, 3vw, 20px);
  font-weight: 700;
  color: #667eea;
  display: block;
}

.summary-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.empty-icon {
  font-size: clamp(36px, 6vw, 48px);
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

/* Responsive Design */
@media (max-width: 480px) {
  .goals-card {
    margin: 10px;
    padding: 20px;
  }
  
  .card-header {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  .goal-header {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .progress-text {
    flex-direction: column;
    gap: 4px;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --surface-gradient: linear-gradient(135deg, #1e293b, #334155);
    --background-light: linear-gradient(135deg, #1e293b, #0f172a);
    --shadow-light: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.4);
  }
  
  .goals-card {
    background: #0f172a;
  }
  
  .progress-bar {
    background: #334155;
  }
}

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

/* Focus states for keyboard navigation */
.add-btn:focus-visible {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

/* Enhanced hover effects for desktop */
@media (hover: hover) {
  .goal-item:hover {
    transform: translateX(4px) scale(1.01);
  }
  
  .add-btn:hover {
    transform: scale(1.05) rotate(90deg);
  }
}