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

:root {
  --bg-main: #0B0F19;
  --bg-card: rgba(22, 28, 45, 0.6);
  --bg-card-hover: rgba(26, 35, 58, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(59, 130, 246, 0.4);
  
  --text-primary: #F3F4F6;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;
  
  --primary: #3B82F6;
  --primary-glow: rgba(59, 130, 246, 0.15);
  --secondary: #8B5CF6;
  --secondary-glow: rgba(139, 92, 246, 0.15);
  --accent: #10B981;
  --accent-glow: rgba(16, 185, 129, 0.15);
  --warning: #F59E0B;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-title: 'Outfit', sans-serif;
  
  --shadow-sm: 0 2px 8px -2px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 16px 40px -8px rgba(0, 0, 0, 0.8);
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Header & Navigation */
header {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background-color: rgba(11, 15, 25, 0.8);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-title);
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 30%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.logo span {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  border: 1px solid rgba(59, 130, 246, 0.3);
  background-color: rgba(59, 130, 246, 0.08);
  padding: 0.15rem 0.5rem;
  border-radius: 20px;
  margin-left: 0.5rem;
  text-transform: uppercase;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 1rem;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: var(--transition);
  border: 1px solid transparent;
}

nav a:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.03);
  border-color: var(--border-color);
}

nav li.active a {
  color: var(--text-primary);
  background-color: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.2);
  font-weight: 600;
}

/* Layout & Typography */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.hero {
  text-align: center;
  margin-bottom: 4rem;
  animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero h1 {
  font-family: var(--font-title);
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  line-height: 1.15;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 750px;
  margin: 0 auto 2.5rem auto;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin-top: 2rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-val {
  font-family: var(--font-title);
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #FFF 30%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.35rem;
  font-weight: 600;
}

/* Section Title */
h2 {
  font-family: var(--font-title);
  font-size: 1.85rem;
  font-weight: 700;
  margin: 3.5rem 0 1.5rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.5rem;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 4px;
}

h3 {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 600;
  margin: 2rem 0 1rem 0;
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 1rem;
}

/* Card System */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.card {
  background-color: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg), 0 0 25px -5px rgba(59, 130, 246, 0.15);
  background-color: var(--bg-card-hover);
}

.card-title {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-title span.number {
  font-size: 0.9rem;
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
}

.btn-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: var(--transition);
}

.btn-link:hover {
  color: var(--text-primary);
  transform: translateX(4px);
}

/* Callout Boxes */
.callout {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.03), rgba(139, 92, 246, 0.03));
  border-left: 4px solid var(--primary);
  padding: 1.5rem;
  border-radius: 0 12px 12px 0;
  margin-bottom: 2rem;
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.callout-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.callout-content {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0;
}

.callout-warning {
  border-left-color: var(--warning);
  background: rgba(245, 158, 11, 0.03);
}

/* Lists */
ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

li {
  margin-bottom: 0.65rem;
  color: var(--text-secondary);
}

li strong {
  color: var(--text-primary);
}

/* Tables */
.table-container {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  margin: 1.5rem 0 3rem 0;
  box-shadow: var(--shadow-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th, td {
  padding: 1.15rem 1.5rem;
  font-size: 0.92rem;
}

th {
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--text-primary);
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.85rem;
}

td {
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  vertical-align: middle;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background-color: rgba(255, 255, 255, 0.015);
  color: var(--text-primary);
}

/* Code Prompts */
.code-block {
  background-color: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  margin: 1rem 0 1.75rem 0;
  font-family: 'Courier New', Courier, monospace;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 0.5rem;
  font-weight: 500;
}

.code-block code {
  color: #34D399;
  font-size: 0.92rem;
  white-space: pre-wrap;
  display: block;
}

.btn-copy {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.75rem;
  transition: var(--transition);
}

.btn-copy:hover {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Badges */
.badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-blue { background: rgba(59, 130, 246, 0.1); color: #60A5FA; border: 1px solid rgba(59, 130, 246, 0.25); }
.badge-purple { background: rgba(139, 92, 246, 0.1); color: #A78BFA; border: 1px solid rgba(139, 92, 246, 0.25); }
.badge-green { background: rgba(16, 185, 129, 0.1); color: #34D399; border: 1px solid rgba(16, 185, 129, 0.25); }
.badge-orange { background: rgba(245, 158, 11, 0.1); color: #FBBF24; border: 1px solid rgba(245, 158, 11, 0.25); }

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 5rem;
}

footer p {
  margin-bottom: 0.25rem;
}

/* Utility classes */
.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.tag-list span {
  font-size: 0.75rem;
  color: var(--text-secondary);
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.pro-con-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.pro-box {
  background-color: rgba(16, 185, 129, 0.02);
  border: 1px solid rgba(16, 185, 129, 0.1);
  border-left: 4px solid var(--accent);
  padding: 1.25rem;
  border-radius: 4px;
}

.con-box {
  background-color: rgba(239, 68, 68, 0.02);
  border: 1px solid rgba(239, 68, 68, 0.1);
  border-left: 4px solid #EF4444;
  padding: 1.25rem;
  border-radius: 4px;
}

.pro-box h4, .con-box h4 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pro-box h4 { color: var(--accent); }
.con-box h4 { color: #F87171; }

.pro-box ul, .con-box ul {
  margin-bottom: 0;
  padding-left: 1.25rem;
}

.pro-box li, .con-box li {
  font-size: 0.88rem;
  margin-bottom: 0.35rem;
}

/* Animations */
.hover-glow {
  position: relative;
}

.hover-glow::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at center, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
  z-index: -1;
}

.hover-glow:hover::after {
  opacity: 1;
}

@media (max-width: 900px) {
  .pro-con-grid {
    grid-template-columns: 1fr;
  }
}