/* ========================================
   IMPORTS
   ======================================== */

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

/* ========================================
   MODERN CSS RESET
   ======================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 80px; /* Account for fixed header */
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  background-image: radial-gradient(circle at 20% 20%, rgba(138, 73, 244, 0.1) 0%, transparent 50%),
                    radial-gradient(circle at 80% 80%, rgba(244, 73, 170, 0.1) 0%, transparent 50%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

ul, ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-4);
}

strong, b {
  font-weight: var(--font-semibold);
}

em, i {
  font-style: italic;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
}

/* ========================================
   LAYOUT UTILITIES
   ======================================== */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (min-width: 1536px) {
  .container {
    max-width: var(--container-2xl);
  }
}

.section {
  padding: var(--space-20) 0;
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-12) 0;
  }
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-2 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-cols-3 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.grid-cols-4 {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-col {
  flex-direction: column;
}

.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ========================================
   COMPONENTS - BUTTONS
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  line-height: 1;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: var(--transition-base);
  white-space: nowrap;
  min-height: 44px; /* Mobile-friendly touch target */
  min-width: 44px;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-secondary {
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-tertiary);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border: 2px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary-purple);
  background: rgba(138, 73, 244, 0.1);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

/* ========================================
   COMPONENTS - CARDS
   ======================================== */

.card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: var(--transition-base);
}

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

.card-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--glass-border);
}

/* ========================================
   COMPONENTS - BADGES
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
}

.badge-gradient {
  background: var(--gradient-primary);
  color: white;
  border: none;
}

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

/* Text Alignment */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Text Colors */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }

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

/* Spacing */
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

/* Visibility */
.hidden { display: none; }

@media (max-width: 768px) {
  .hide-mobile { display: none; }
}

@media (min-width: 769px) {
  .hide-desktop { display: none; }
}

/* ========================================
   ANIMATIONS
   ======================================== */

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

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

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

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

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

/* 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-width: 0;
}

/* Selection */
::selection {
  background: var(--color-primary-purple);
  color: white;
}

::-moz-selection {
  background: var(--color-primary-purple);
  color: white;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-purple);
}