/* Modern Design System for Think Done App */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* CSS Custom Properties (Design Tokens) */
:root {
  /* Colors - Modern Dark Blue Gradient Scheme */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;
  
  /* Secondary - Emerald Green */
  --secondary-50: #ecfdf5;
  --secondary-100: #d1fae5;
  --secondary-200: #a7f3d0;
  --secondary-300: #6ee7b7;
  --secondary-400: #34d399;
  --secondary-500: #10b981;
  --secondary-600: #059669;
  --secondary-700: #047857;
  --secondary-800: #065f46;
  --secondary-900: #064e3b;
  
  /* Accent - Purple */
  --accent-50: #f5f3ff;
  --accent-100: #ede9fe;
  --accent-200: #ddd6fe;
  --accent-300: #c4b5fd;
  --accent-400: #a78bfa;
  --accent-500: #8b5cf6;
  --accent-600: #7c3aed;
  --accent-700: #6d28d9;
  --accent-800: #5b21b6;
  --accent-900: #4c1d95;
  
  /* Neutrals */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Typography */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', Monaco, 'Cascadia Code', monospace;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--gray-800);
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--accent-600) 100%);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout Components */
.modern-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Navigation */
.modern-nav {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all var(--transition-normal);
}

.modern-nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-brand {
  font-weight: 700;
  font-size: var(--text-xl);
  color: white;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
}

.modern-nav.scrolled .nav-brand {
  color: var(--gray-800);
}

.modern-nav.scrolled .nav-brand svg {
  opacity: 0.8;
}

.nav-brand:hover {
  color: var(--primary-200);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}

.nav-link {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.modern-nav.scrolled .nav-link {
  color: var(--gray-600);
}

.modern-nav.scrolled .nav-link:hover {
  color: var(--gray-800);
  background: var(--gray-100);
}

/* Dropdown Menu Styling */
.dropdown-menu {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  min-width: 180px;
}

.dropdown-item {
  color: var(--gray-700);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.dropdown-item:hover {
  background: var(--gray-100);
  color: var(--gray-900);
}

.dropdown-item:focus {
  background: var(--primary-100);
  color: var(--primary-800);
}

.dropdown-divider {
  border-top: 1px solid var(--gray-200);
  margin: var(--space-2) 0;
}

/* User menu dropdown toggle */
.nav-item.dropdown .nav-link.dropdown-toggle {
  cursor: pointer;
}

.nav-item.dropdown .nav-link.dropdown-toggle::after {
  margin-left: var(--space-2);
}

.nav-link:hover {
  color: white;
  background: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--secondary-400);
  border-radius: var(--radius-full);
}

/* Cards */
.modern-card {
  background: white;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.modern-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2xl);
}

.modern-card-header {
  padding: var(--space-6);
  background: linear-gradient(135deg, var(--primary-600), var(--accent-600));
  color: white;
  border: none;
}

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

.modern-card-footer {
  padding: var(--space-6);
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
}

/* Buttons */
.btn-modern-primary {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  color: white;
  border: none;
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-6);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.btn-modern-primary:hover {
  background: linear-gradient(135deg, var(--primary-700), var(--primary-800));
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
  text-decoration: none;
}

.btn-modern-secondary {
  background: linear-gradient(135deg, var(--secondary-500), var(--secondary-600));
  color: white;
  border: none;
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-6);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.btn-modern-secondary:hover {
  background: linear-gradient(135deg, var(--secondary-600), var(--secondary-700));
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
  text-decoration: none;
}

.btn-modern-outline {
  background: transparent;
  color: var(--primary-600);
  border: 2px solid var(--primary-600);
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-6);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.btn-modern-outline:hover {
  background: var(--primary-600);
  color: white;
  text-decoration: none;
}

/* Typography */
.heading-1 {
  font-size: var(--text-5xl);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  background: linear-gradient(135deg, var(--primary-600), var(--accent-600));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.heading-2 {
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: var(--gray-800);
}

.heading-3 {
  font-size: var(--text-3xl);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--space-4);
  color: var(--gray-800);
}

.heading-4 {
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--space-3);
  color: var(--gray-800);
}

.text-large {
  font-size: var(--text-xl);
  line-height: 1.6;
  color: var(--gray-600);
}

.text-muted {
  color: var(--gray-500);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    transform: translate3d(0,0,0);
  }
  40%, 43% {
    transform: translate3d(0, -15px, 0);
  }
  70% {
    transform: translate3d(0, -7px, 0);
  }
  90% {
    transform: translate3d(0, -2px, 0);
  }
}

@keyframes gradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in-left {
  animation: fadeInLeft 0.6s ease-out;
}

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

.animate-bounce {
  animation: bounce 1s infinite;
}

.animate-gradient {
  background-size: 400% 400%;
  animation: gradient 15s ease infinite;
}

/* Hero Section */
.hero-section {
  padding: var(--space-12) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="grad1" cx="50%" cy="50%" r="50%"><stop offset="0%" style="stop-color:rgba(255,255,255,0.1)" /><stop offset="100%" style="stop-color:rgba(255,255,255,0)" /></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23grad1)"/><circle cx="800" cy="300" r="150" fill="url(%23grad1)"/><circle cx="400" cy="700" r="120" fill="url(%23grad1)"/></svg>');
  opacity: 0.5;
  z-index: -1;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Feature Cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-16);
}

.feature-card {
  background: white;
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
  border: 1px solid var(--gray-200);
}

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

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  color: white;
  margin-bottom: var(--space-4);
}

/* Progress Indicators */
.progress-modern {
  background: var(--gray-200);
  border-radius: var(--radius-full);
  height: 12px;
  overflow: hidden;
  position: relative;
}

.progress-bar-modern {
  background: linear-gradient(90deg, var(--primary-500), var(--secondary-500));
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  position: relative;
}

.progress-bar-modern::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.3) 50%, transparent 60%);
  animation: shimmer 2s infinite;
}

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

/* Form Elements */
.form-modern {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-group-modern {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label-modern {
  font-weight: 600;
  color: var(--gray-700);
  font-size: var(--text-sm);
}

.form-input-modern {
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
  background: white;
}

.form-input-modern:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-textarea-modern {
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
  background: white;
  min-height: 120px;
  resize: vertical;
  font-family: var(--font-family-primary);
}

.form-textarea-modern:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Badges and Tags */
.badge-modern {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary {
  background: var(--primary-100);
  color: var(--primary-800);
}

.badge-secondary {
  background: var(--secondary-100);
  color: var(--secondary-800);
}

.badge-success {
  background: var(--secondary-100);
  color: var(--secondary-800);
}

/* Data Visualization */
.stat-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all var(--transition-normal);
}

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

.stat-number {
  font-size: var(--text-4xl);
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-600), var(--accent-600));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--gray-600);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Responsive Design */
@media (max-width: 768px) {
  .modern-container {
    padding: 0 var(--space-3);
  }
  
  .hero-section {
    padding: var(--space-16) 0;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  
  .nav-links {
    flex-direction: column;
    gap: var(--space-3);
  }
}

/* Loading States */
.loading-skeleton {
  background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* 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 states */
*:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

button:focus,
a:focus,
input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* Preference Selection System */
.preference-tags {
  display: flex !important;
  flex-wrap: wrap !important;
  gap: 8px !important;
  margin-top: 8px !important;
}

.preference-tag {
  background: #e9ecef !important;
  border: 2px solid #dee2e6 !important;
  border-radius: 20px !important;
  padding: 8px 16px !important;
  font-size: 0.9em !important;
  font-weight: 500 !important;
  cursor: pointer !important;
  transition: all 0.3s ease !important;
  user-select: none !important;
  display: inline-block !important;
  margin: 3px !important;
  text-decoration: none !important;
  color: #495057 !important;
  position: relative !important;
  overflow: hidden !important;
}

.preference-tag::before {
  content: '' !important;
  position: absolute !important;
  top: 0 !important;
  left: -100% !important;
  width: 100% !important;
  height: 100% !important;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent) !important;
  transition: left 0.5s ease !important;
}

.preference-tag:hover {
  background: #007bff !important;
  color: white !important;
  border-color: #0056b3 !important;
  transform: translateY(-3px) scale(1.02) !important;
  box-shadow: 0 6px 20px rgba(0,123,255,0.4) !important;
  text-decoration: none !important;
}

.preference-tag:hover::before {
  left: 100% !important;
}

.preference-tag.selected {
  background: linear-gradient(135deg, #28a745, #20c997) !important;
  color: white !important;
  border-color: #1e7e34 !important;
  font-weight: bold !important;
  transform: scale(1.08) !important;
  box-shadow: 0 6px 24px rgba(40,167,69,0.5) !important;
  animation: selectedPulse 0.5s ease-out !important;
}

.preference-tag:active {
  transform: scale(0.98) !important;
  transition: transform 0.1s ease !important;
}

@keyframes selectedPulse {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(40,167,69,0.7); }
  50% { transform: scale(1.15); box-shadow: 0 0 0 10px rgba(40,167,69,0); }
  100% { transform: scale(1.08); box-shadow: 0 6px 24px rgba(40,167,69,0.5); }
}

@keyframes clickPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1.05); }
}

.preference-tag.clicked {
  animation: clickPulse 0.3s ease-out !important;
}

/* Selected preferences display */
#selected-preferences {
  background: linear-gradient(135deg, #d1fae5, #a7f3d0) !important;
  border: 2px solid #10b981 !important;
  border-radius: 12px !important;
  padding: 16px !important;
  margin-top: 20px !important;
}

#selected-preferences h6 {
  color: #047857 !important;
  margin-bottom: 12px !important;
}

#selected-activities, #selected-locations {
  color: #065f46 !important;
  font-weight: 500 !important;
  margin-bottom: 8px !important;
}

/* Custom input styling */
.form-input-modern {
  transition: all 0.3s ease !important;
  font-family: var(--font-family-primary) !important;
}

.form-input-modern:focus {
  outline: none !important;
  border-color: var(--primary-500) !important;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1) !important;
}

/* Custom preference tags */
.custom-tag {
  position: relative !important;
  overflow: hidden !important;
}

.custom-tag::after {
  content: '✨' !important;
  position: absolute !important;
  top: -2px !important;
  right: 2px !important;
  font-size: 0.7em !important;
  opacity: 0.7 !important;
}

.custom-activities-section, .custom-locations-section {
  background: linear-gradient(135deg, #f0f9ff, #e0f2fe) !important;
  border: 1px solid #0ea5e9 !important;
  border-radius: 12px !important;
  padding: 12px !important;
  margin-top: 16px !important;
  animation: slideIn 0.5s ease-out !important;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Enhanced button styling for custom inputs */
#add_custom_activities_btn, #add_custom_locations_btn {
  transition: all 0.3s ease !important;
  font-weight: 600 !important;
}

#add_custom_activities_btn:hover {
  background: var(--primary-600) !important;
  color: white !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3) !important;
}

#add_custom_locations_btn:hover {
  background: var(--accent-600) !important;
  color: white !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3) !important;
}

/* Print styles */
@media print {
  .modern-nav,
  .hero-section::before {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .modern-card {
    box-shadow: none;
    border: 1px solid var(--gray-300);
  }
}