/*
 * SmallBusinessAI Hub Redesign - Main CSS Design System
 * Sleek Glassmorphic Dark Mode with Neon Gradient Accents
 */

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

:root {
  /* Color Palette */
  --bg-dark: #070b13;
  --bg-slate: #0b1120;
  --text-light: #f8fafc;
  --text-muted: #94a3b8;
  --text-dark: #0f172a;
  
  /* Gradients */
  --grad-primary: linear-gradient(135deg, #06b6d4 0%, #10b981 100%);
  --grad-secondary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --grad-accent: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%);
  --grad-card-glow: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
  
  /* Borders & Glassmorphism */
  --glass-bg: rgba(17, 24, 39, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  
  /* Fonts */
  --font-headings: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Transitions */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(16, 185, 129, 0.05) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headings);
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
}

/* Layout Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(7, 11, 19, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-family: var(--font-headings);
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--grad-primary);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-dark);
  font-weight: 900;
  font-size: 1.2rem;
  -webkit-text-fill-color: var(--bg-dark);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-light);
}

/* Hero Section */
.hero {
  padding-top: 180px;
  padding-bottom: 120px;
  text-align: center;
  position: relative;
}

.badge {
  display: inline-block;
  background: rgba(6, 182, 212, 0.1);
  color: #06b6d4;
  border: 1px solid rgba(6, 182, 212, 0.2);
  padding: 6px 18px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 4rem;
  line-height: 1.1;
  font-weight: 800;
  margin-bottom: 24px;
  background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title span {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 40px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 8px;
  font-family: var(--font-headings);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-primary {
  background: var(--grad-primary);
  color: var(--bg-dark);
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(16, 185, 129, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  color: var(--text-light);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  border-radius: 6px;
}

.btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* Grid & Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--glass-shadow);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-primary);
  opacity: 0;
  transition: var(--transition-smooth);
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(6, 182, 212, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.card:hover::before {
  opacity: 1;
}

.card-secondary::before {
  background: var(--grad-secondary);
}

.card-secondary:hover {
  border-color: rgba(59, 130, 246, 0.3);
}

.card-accent::before {
  background: var(--grad-accent);
}

.card-accent:hover {
  border-color: rgba(236, 72, 153, 0.3);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.card h3 {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
  flex-grow: 1;
}

.card-link {
  font-family: var(--font-headings);
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #06b6d4;
}

.card-secondary .card-link {
  color: #3b82f6;
}

.card-accent .card-link {
  color: #ec4899;
}

.card-link:hover {
  gap: 12px;
}

/* Explainer Guide Layout */
.guide-layout {
  padding-top: 140px;
  max-width: 800px;
  margin: 0 auto;
}

.guide-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 40px;
}

.guide-title {
  font-size: 3rem;
  margin-bottom: 16px;
}

.guide-meta {
  display: flex;
  gap: 24px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.guide-content h2 {
  font-size: 1.8rem;
  margin-top: 48px;
  margin-bottom: 16px;
  color: var(--text-light);
}

.guide-content p {
  margin-bottom: 24px;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

.guide-content ul, .guide-content ol {
  margin-bottom: 24px;
  padding-left: 24px;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.guide-content li {
  margin-bottom: 12px;
}

.guide-content strong {
  color: var(--text-light);
}

.callout {
  background: rgba(59, 130, 246, 0.05);
  border-left: 4px solid #3b82f6;
  padding: 24px;
  border-radius: 0 12px 12px 0;
  margin: 32px 0;
}

.callout-title {
  font-family: var(--font-headings);
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-light);
}

.callout p {
  margin-bottom: 0;
  font-size: 1rem;
}

/* Footer */
footer {
  background-color: #04060b;
  padding: 80px 0 40px;
  border-top: 1px solid var(--glass-border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand p {
  margin-top: 16px;
  max-width: 300px;
}

.footer-links h4 {
  color: var(--text-light);
  margin-bottom: 20px;
  font-size: 1rem;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a:hover {
  color: var(--text-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Responsive adjustments */
@media (max-width: 960px) {
  .hero-title {
    font-size: 3rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 2.25rem;
  }
  .nav-menu {
    display: none; /* simple hidden nav for simplicity, or burger menu in production */
  }
  .btn-group {
    flex-direction: column;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
}