/* Base CSS - Reset, Variables, Typography */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800;900&display=swap');

/* CSS Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  height: 100%;
}

body {
  min-height: 100%;
  font-family: 'Montserrat', sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* CSS Variables */
:root {
  /* Colors - Light Theme */
  --color-background: #ffffff;
  --color-foreground: #0a0a0a;
  --color-card: #ffffff;
  --color-card-foreground: #0a0a0a;
  --color-primary: #2563eb;
  --color-primary-foreground: #ffffff;
  --color-secondary: #f3f4f6;
  --color-secondary-foreground: #0a0a0a;
  --color-muted: #f9fafb;
  --color-muted-foreground: #6b7280;
  --color-accent: #f3f4f6;
  --color-accent-foreground: #0a0a0a;
  --color-destructive: #ef4444;
  --color-destructive-foreground: #ffffff;
  --color-border: #e5e7eb;
  --color-input: #e5e7eb;
  --color-ring: #2563eb;

  /* Chart colors */
  --chart-1: #3b82f6;
  --chart-2: #10b981;
  --chart-3: #f59e0b;
  --chart-4: #ef4444;
  --chart-5: #8b5cf6;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --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);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Z-index */
  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Dark Theme */
.dark {
  --color-background: #0a0a0a;
  --color-foreground: #fafafa;
  --color-card: #1a1a1a;
  --color-card-foreground: #fafafa;
  --color-primary: #3b82f6;
  --color-primary-foreground: #ffffff;
  --color-secondary: #262626;
  --color-secondary-foreground: #fafafa;
  --color-muted: #262626;
  --color-muted-foreground: #a1a1aa;
  --color-accent: #262626;
  --color-accent-foreground: #fafafa;
  --color-destructive: #7f1d1d;
  --color-destructive-foreground: #fafafa;
  --color-border: #262626;
  --color-input: #262626;
  --color-ring: #3b82f6;

  /* Chart colors for dark theme */
  --chart-1: #60a5fa;
  --chart-2: #34d399;
  --chart-3: #fbbf24;
  --chart-4: #f87171;
  --chart-5: #a78bfa;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-foreground);
}

h1 {
  font-size: 2.25rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 1.875rem;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

h5 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
}

h6 {
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-foreground);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

/* Utility Classes */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Layout */

/* Loading States */
.loading {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* Global Gradient Classes */
.gradient-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, #8b5cf6 100%);
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-blue {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.gradient-green {
  background: linear-gradient(135deg, #10b981, #059669);
}

.gradient-purple {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.gradient-orange {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}

.gradient-indigo {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
}

.gradient-accent {
  background: linear-gradient(90deg, var(--color-primary), #8b5cf6);
}

/* Dark mode gradient adjustments */
.dark .gradient-accent {
  background: linear-gradient(90deg, var(--chart-1), var(--chart-5));
}

/* Background gradient overlays for sections */
.gradient-background-light {
  background: linear-gradient(135deg,
    rgba(37, 99, 235, 0.03) 0%,
    rgba(139, 92, 246, 0.03) 100%);
}

.gradient-background-dark {
  background: linear-gradient(135deg,
    rgba(59, 130, 246, 0.05) 0%,
    rgba(139, 92, 246, 0.05) 100%);
}

.dark .gradient-background-light {
  background: linear-gradient(135deg,
    rgba(59, 130, 246, 0.1) 0%,
    rgba(167, 139, 250, 0.1) 100%);
}

.dark .gradient-background-dark {
  background: linear-gradient(135deg,
    rgba(59, 130, 246, 0.15) 0%,
    rgba(167, 139, 250, 0.15) 100%);
}

/* Gradient borders */
.gradient-border {
  position: relative;
  background: var(--color-card);
}

.gradient-border::before {
  content: '';
  position: absolute;
  inset: 0;
  padding: 1px;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--color-primary), #8b5cf6);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* Gradient hover effects */
.gradient-hover {
  position: relative;
  overflow: hidden;
}

.gradient-hover::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), #8b5cf6);
  transform: translateX(-100%);
  transition: transform var(--transition-base);
}

.gradient-hover:hover::before {
  transform: translateX(0);
}

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

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

.fade-in {
  animation: fadeIn var(--transition-base);
}

.slide-up {
  animation: slideUp var(--transition-slow);
}

/* Responsive Utilities */
.hidden {
  display: none;
}

@media (min-width: 640px) {
  .sm\:block {
    display: block;
  }
  .sm\:hidden {
    display: none;
  }
}

@media (min-width: 768px) {
  .md\:block {
    display: block;
  }
  .md\:hidden {
    display: none;
  }
}

@media (min-width: 1024px) {
  .lg\:block {
    display: block;
  }
  .lg\:hidden {
    display: none;
  }
}