@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;700&display=swap');

:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --success-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --warning-gradient: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --danger-gradient: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  --info-gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  line-height: 1.6;
}

/* Enhanced Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.8; }
}

@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

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

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

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

.animate-pulse-slow {
  animation: pulse 2s infinite;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* Enhanced Glass Morphism */
.glass {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-xl);
}

.glass-dark {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
}

/* Enhanced Cards */
.card {
  background: white;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover::before {
  opacity: 1;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.card-glow {
  box-shadow: 0 0 40px rgba(99, 102, 241, 0.15);
}

/* Enhanced Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width var(--transition-base), height var(--transition-base);
}

.btn:active::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px 0 rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: white;
  color: #4b5563;
  border: 2px solid #e5e7eb;
}

.btn-secondary:hover {
  background: #f9fafb;
  border-color: #9ca3af;
}

/* Enhanced Form Elements */
.form-input {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
  background: white;
}

.form-input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  transform: translateY(-1px);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: #374151;
  margin-bottom: 0.5rem;
}

/* Enhanced Stats Cards */
.stat-card {
  background: white;
  border-radius: 20px;
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
}

.stat-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
  transform: scale(0);
  transition: transform var(--transition-slow);
}

.stat-card:hover::after {
  transform: scale(1);
}

.stat-card:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: var(--shadow-xl);
}

/* Enhanced Filter Pills */
.filter-pill {
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 2px solid transparent;
  background: white;
  color: #6b7280;
  box-shadow: var(--shadow-sm);
}

.filter-pill:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.filter-pill.active {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--shadow-lg);
}

/* Enhanced Search Bar */
.search-container {
  position: relative;
  margin-bottom: 2rem;
}

.search-input {
  width: 100%;
  padding: 1rem 1rem 1rem 3.5rem;
  border: 2px solid transparent;
  border-radius: 16px;
  font-size: 1rem;
  background: white;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.search-input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1), var(--shadow-lg);
  transform: translateY(-2px);
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: #9ca3af;
  transition: color var(--transition-fast);
}

.search-input:focus + .search-icon {
  color: #667eea;
}

/* Enhanced Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

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

.modal-content {
  background: white;
  border-radius: 20px;
  padding: 2rem;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-2xl);
}

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

/* Enhanced Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 10px;
  transition: all var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #764ba2, #667eea);
}

/* Enhanced Dark Mode */
.dark {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #f1f5f9;
}

.dark .card {
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.dark .form-input {
  background: #0f172a;
  border-color: #334155;
  color: #f1f5f9;
}

.dark .form-input:focus {
  border-color: #667eea;
}

.dark .modal-content {
  background: #1e293b;
  color: #f1f5f9;
}

.dark .stat-card {
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.dark .search-input {
  background: #0f172a;
  color: #f1f5f9;
  border-color: #334155;
}

.dark .filter-pill {
  background: #334155;
  color: #cbd5e1;
  border-color: #475569;
}

.dark .filter-pill.active {
  background: var(--primary-gradient);
  color: white;
}

/* Enhanced Calendar */
.calendar-day {
  min-height: 100px;
  padding: 0.75rem;
  border: 1px solid #e5e7eb;
  background: white;
  transition: all var(--transition-fast);
  cursor: pointer;
  position: relative;
}

.calendar-day:hover {
  background: #f9fafb;
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
  z-index: 10;
}

.calendar-day.today {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(118, 75, 162, 0.1));
  border-color: #667eea;
}

.calendar-day.selected {
  background: var(--primary-gradient);
  color: white;
}

.calendar-day.selected .calendar-date {
  color: white;
}

.dark .calendar-day {
  background: #1e293b;
  border-color: #334155;
  color: #cbd5e1;
}

.dark .calendar-day:hover {
  background: #334155;
}

.dark .calendar-day.today {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(118, 75, 162, 0.2));
}

/* Enhanced Loading State */
.loading-shimmer {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* Enhanced Responsive Design */
@media (max-width: 768px) {
  .card {
    border-radius: 12px;
  }
  
  .stat-card {
    padding: 1rem;
  }
  
  .btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.8125rem;
  }
  
  .calendar-day {
    min-height: 80px;
    font-size: 0.875rem;
  }
  
  .modal-content {
    padding: 1.5rem;
    border-radius: 16px;
  }
}

/* Enhanced Utilities */
.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.shadow-gradient {
  box-shadow: 0 10px 40px -10px rgba(99, 102, 241, 0.4);
}

.border-gradient {
  border: 2px solid transparent;
  background: white;
  background-clip: padding-box;
  position: relative;
}

.border-gradient::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: -1;
  margin: -2px;
  border-radius: inherit;
  background: var(--primary-gradient);
}

/* Enhanced Specific Components */
.quick-stats-container {
  background: var(--primary-gradient);
  border-radius: 24px;
  padding: 3rem 2rem;
  margin: -2rem -2rem 2rem -2rem;
  position: relative;
  overflow: hidden;
}

.quick-stats-container::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.reminders-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
  animation: fadeIn var(--transition-slow) ease-out;
}

.empty-state {
  padding: 4rem 2rem;
  text-align: center;
  color: #6b7280;
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  opacity: 0.5;
}

/* Enhanced Settings */
.settings-sidebar {
  background: white;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.settings-nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  transition: all var(--transition-fast);
  cursor: pointer;
  border-left: 4px solid transparent;
}

.settings-nav-item:hover {
  background: #f9fafb;
  border-left-color: #667eea;
}

.settings-nav-item.active {
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.1), transparent);
  border-left-color: #667eea;
  color: #667eea;
  font-weight: 600;
}

.settings-section {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.theme-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.theme-option {
  padding: 1rem;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-option:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.theme-option.selected {
  border-color: #667eea;
  background: rgba(99, 102, 241, 0.05);
}