/* Premium SaaS-style CSS Framework */
/* RankMarkham - Enterprise SEO Brand */

:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --bg-dark: #0f172a;
  --bg-darker: #020617;
  --surface: #1e293b;
  --surface-light: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --border: #475569;
  --accent: #06b6d4;
  --success: #10b981;
  --error: #ef4444;
  
  --spacing: 1rem;
  --spacing-2: calc(var(--spacing) * 0.5);
  --spacing-3: calc(var(--spacing) * 1.5);
  --spacing-4: calc(var(--spacing) * 2);
  --spacing-6: calc(var(--spacing) * 3);
  --spacing-8: calc(var(--spacing) * 4);
  --spacing-12: calc(var(--spacing) * 6);
  --spacing-16: calc(var(--spacing) * 8);
  
  --radius: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  
  --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-4);
}

.container-sm {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-4);
}

/* Header Navigation */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition-fast);
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-3) var(--spacing-4);
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
  flex: 1;
  margin-left: var(--spacing-8);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-2);
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius);
  transition: all var(--transition-fast);
  font-size: 0.95rem;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.1);
}

.nav-link.active {
  color: var(--primary);
}

/* Dropdown Menu */
.dropdown {
  position: relative;
}

.dropdown-toggle::after {
  content: '▼';
  font-size: 0.65rem;
  margin-left: var(--spacing-2);
  transition: transform var(--transition-fast);
}

.dropdown:hover .dropdown-toggle::after {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  min-width: 250px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  list-style: none;
  margin-top: var(--spacing-2);
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  padding: var(--spacing-2) var(--spacing-3);
  color: var(--text-secondary);
  text-decoration: none;
  display: block;
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  padding-left: var(--spacing-4);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.btn {
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius);
  border: none;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
}

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

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(37, 99, 235, 0.05);
}

/* Hero Section */
.hero {
  padding: var(--spacing-16) var(--spacing-4);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-12);
  align-items: center;
  margin-bottom: var(--spacing-16);
}

.hero-content h1 {
  font-size: clamp(2.5rem, 8vw, 4rem);
  line-height: 1.2;
  margin-bottom: var(--spacing-4);
  font-weight: 700;
}

.hero-highlight {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-6);
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-6);
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border);
  padding: var(--spacing-8);
  min-height: 400px;
  position: relative;
  overflow: hidden;
}

.dashboard-visual {
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom right, rgba(37, 99, 235, 0.2), rgba(6, 182, 212, 0.1));
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.stat-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4);
  backdrop-filter: blur(10px);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-2);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-tertiary);
}

/* Section */
section {
  padding: var(--spacing-12) var(--spacing-4);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: var(--spacing-6);
  text-align: center;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  text-align: center;
  margin-bottom: var(--spacing-12);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-12);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  transition: all var(--transition);
  cursor: pointer;
}

.card:hover {
  border-color: var(--primary);
  background: rgba(37, 99, 235, 0.05);
  transform: translateY(-8px);
  box-shadow: 0 16px 40px rgba(37, 99, 235, 0.2);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-4);
}

.card-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: var(--spacing-2);
}

.card-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-4);
  line-height: 1.6;
}

.card-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  transition: gap var(--transition-fast);
}

.card-link:hover {
  gap: var(--spacing-3);
}

/* Stats Section */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-6);
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-2);
}

.stat-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Process Section */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-12);
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.step-number {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-4);
}

.step-title {
  font-weight: 600;
  margin-bottom: var(--spacing-2);
}

.step-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  background: var(--border);
  top: 30px;
  left: 50%;
  z-index: -1;
}

/* Testimonials */
.testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-6);
}

.testimonial {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  display: flex;
  flex-direction: column;
}

.testimonial-stars {
  color: #fbbf24;
  margin-bottom: var(--spacing-2);
  font-size: 0.9rem;
}

.testimonial-text {
  flex: 1;
  margin-bottom: var(--spacing-4);
  line-height: 1.7;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.author-avatar {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.author-title {
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-2xl);
  padding: var(--spacing-12);
  text-align: center;
  margin: var(--spacing-16) auto;
  max-width: 900px;
}

.cta-section h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-4);
}

.cta-section p {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-6);
  opacity: 0.95;
}

.cta-form {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: var(--spacing-2);
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-2);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
}

.cta-form input {
  padding: var(--spacing-2) var(--spacing-3);
  background: rgba(255, 255, 255, 0.9);
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.cta-form input::placeholder {
  color: #999;
}

.cta-form .btn {
  background: var(--bg-dark);
  color: var(--text-primary);
}

/* Footer */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: var(--spacing-12) var(--spacing-4);
  margin-top: var(--spacing-16);
}

footer .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-8);
}

.footer-section h4 {
  margin-bottom: var(--spacing-4);
  font-size: 0.95rem;
  font-weight: 600;
}

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

.footer-links li {
  margin-bottom: var(--spacing-2);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: var(--spacing-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-tertiary);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
  
  .hero-visual {
    min-height: 300px;
  }
  
  nav {
    display: none;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .cta-form {
    grid-template-columns: 1fr;
  }
  
  .process-steps {
    grid-template-columns: 1fr;
  }
  
  .process-step:not(:last-child)::after {
    width: 2px;
    height: 100%;
    top: 60px;
    left: 30px;
  }
  
  footer .container {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-4);
    text-align: center;
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.fade-in-up {
  animation: fadeInUp var(--transition) ease-out;
}

.slide-in-right {
  animation: slideInRight var(--transition) ease-out;
}