/* ================================
   UNIFIED DESIGN SYSTEM - FIN AI
   ================================ */

@import url('fonts.css');

/* ================================
   DESIGN TOKENS & CSS VARIABLES
   ================================ */

:root {
  /* Primary Color Palette */
  --primary-gradient: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-indigo) 100%);
  --primary-gradient-hover: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
  --primary-50: rgba(102, 126, 234, 0.05);
  --primary-100: rgba(102, 126, 234, 0.1);
  --primary-200: rgba(102, 126, 234, 0.2);
  --primary-500: var(--primary-blue);
  --primary-600: #5a6fd8;
  --primary-700: #4c63d2;
  
  /* Secondary Colors */
  --secondary-gradient: linear-gradient(135deg, var(--secondary-indigo) 0%, var(--primary-blue) 100%);
  --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  
  /* Success/Warning/Error Colors */
  --success-color: #10b981;
  --success-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --warning-color: #f59e0b;
  --warning-gradient: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --error-color: #ef4444;
  --error-gradient: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  
  /* Neutral Colors */
  --white: #ffffff;
  --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;
  
  /* Glass Morphism Standards */
  --glass-bg: var(--bg-white);
  --glass-bg-dark: rgba(0, 0, 0, 0.2);
  --glass-border: var(--bg-white);
  --glass-border-dark: var(--bg-white);
  --glass-blur: 25px;
  --glass-blur-lg: 40px;
  
  /* Border Radius Scale */
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --radius-2xl: 28px;
  --radius-3xl: 32px;
  
  /* Shadow System */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);
  --shadow-glass: 0 8px 32px rgba(102, 126, 234, 0.15);
  
  /* Typography Scale */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --font-weight-black: 900;
  
  /* 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;
  
  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
  --transition-spring: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 9999;
}

/* ================================
   DARK MODE VARIABLES
   ================================ */

[data-theme="dark"] {
  --glass-bg: rgba(0, 0, 0, 0.4);
  --glass-border: var(--bg-white);
  --text-primary: var(--white);
  --text-secondary: var(--gray-300);
  --text-muted: var(--gray-400);
  --bg-primary: var(--gray-900);
  --bg-secondary: var(--gray-800);
}

/* ================================
   GLOBAL STYLES
   ================================ */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--gray-800);
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ================================
   GLASS MORPHISM COMPONENTS
   ================================ */

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-glass);
  transition: all var(--transition-spring);
}

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

.glass-button {
  background: var(--primary-gradient);
  border: none;
  border-radius: var(--radius-lg);
  color: var(--white);
  font-weight: var(--font-weight-semibold);
  padding: var(--space-4) var(--space-6);
  cursor: pointer;
  transition: all var(--transition-spring);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-decoration: none;
  outline: none;
  position: relative;
  overflow: hidden;
}

.glass-button:hover {
  background: var(--primary-gradient-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.glass-button:focus {
  outline: 2px solid var(--primary-200);
  outline-offset: 2px;
}

.glass-button:active {
  transform: translateY(0);
}

.glass-button-outline {
  background: transparent;
  border: 2px solid var(--glass-border);
  color: var(--primary-600);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

.glass-button-outline:hover {
  background: var(--primary-50);
  border-color: var(--primary-500);
  color: var(--primary-700);
}

/* ================================
   NAVIGATION COMPONENT
   ================================ */

.floating-nav {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur-lg));
  -webkit-backdrop-filter: blur(var(--glass-blur-lg));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-2xl);
  position: sticky;
  top: var(--space-6);
  z-index: var(--z-sticky);
  margin-bottom: var(--space-8);
}

.nav-brand {
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-black);
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}

.nav-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--gray-600);
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--success-color);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

/* ================================
   CARD COMPONENTS
   ================================ */

.feature-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  transition: all var(--transition-spring);
  cursor: pointer;
  box-shadow: var(--shadow-md);
}

.feature-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-2xl);
  border-color: var(--primary-200);
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-lg);
}

.feature-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--gray-800);
  margin-bottom: var(--space-3);
}

.feature-description {
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

/* ================================
   FORM COMPONENTS
   ================================ */

.form-input {
  width: 100%;
  padding: var(--space-4);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  font-family: var(--font-family);
  font-size: var(--text-base);
  transition: all var(--transition-spring);
  outline: none;
}

.form-input:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px var(--primary-100);
}

.form-input::placeholder {
  color: var(--gray-400);
}

.form-label {
  display: block;
  font-weight: var(--font-weight-medium);
  color: var(--gray-700);
  margin-bottom: var(--space-2);
}

/* ================================
   MODAL COMPONENTS
   ================================ */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: var(--z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.modal-content {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur-lg));
  -webkit-backdrop-filter: blur(var(--glass-blur-lg));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-2xl);
  max-width: 90vw;
  max-height: 90vh;
  overflow: auto;
}

.modal-header {
  background: var(--primary-gradient);
  color: var(--white);
  padding: var(--space-6);
  border-radius: var(--radius-3xl) var(--radius-3xl) 0 0;
}

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

/* ================================
   UTILITY CLASSES
   ================================ */

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

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

.animate-slide-up {
  animation: slideUp 0.6s ease-out;
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

/* ================================
   RESPONSIVE DESIGN
   ================================ */

@media (max-width: 768px) {
  .floating-nav {
    margin: var(--space-4);
    border-radius: var(--radius-2xl);
  }
  
  .feature-card {
    padding: var(--space-6);
  }
  
  .feature-icon {
    width: 48px;
    height: 48px;
  }
  
  .feature-title {
    font-size: var(--text-xl);
  }
}

/* ================================
   LOADING STATES
   ================================ */

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--glass-border);
  border-top: 3px solid var(--primary-500);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

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

@keyframes shimmer {
  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-visible:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* ================================
   PRINT STYLES
   ================================ */

@media print {
  .floating-nav,
  .glass-button,
  .modal-backdrop {
    display: none !important;
  }
  
  .glass-card {
    background: var(--white) !important;
    border: 1px solid var(--gray-300) !important;
    box-shadow: none !important;
  }
}