:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-secondary: #64748b;
  --color-text: #0f172a;
  --color-text-light: #475569;
  --color-text-muted: #64748b;
  --color-bg: #ffffff;
  --color-bg-light: #f8fafc;
  --color-bg-subtle: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Consolas', 'Liberation Mono', 'Courier New', monospace;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
  --radius: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --max-width: 1280px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(37, 99, 235, 0.06) 0%, transparent 60%),
    radial-gradient(circle at 85% 85%, rgba(139, 92, 246, 0.05) 0%, transparent 60%),
    radial-gradient(circle at 35% 65%, rgba(16, 185, 129, 0.04) 0%, transparent 55%),
    radial-gradient(circle at 65% 25%, rgba(245, 101, 101, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--color-text);
  letter-spacing: -0.025em;
}

h1 { 
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
}
h2 { 
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
}
h3 { 
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: 600;
}
h4 { 
  font-size: 1.25rem;
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
  color: var(--color-text-light);
  line-height: 1.7;
  font-size: 1rem;
}

.lead {
  font-size: 1.125rem;
  font-weight: 400;
  line-height: 1.6;
}

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

a:hover {
  color: var(--color-primary-dark);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

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

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

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

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.nav-left {
  display: flex;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
}

.logo:hover {
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: var(--transition);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  color: var(--color-text-light);
  font-weight: 500;
  transition: var(--transition);
}

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

.nav-cta .btn {
  font-size: 0.875rem;
  padding: 0.5rem 1.25rem;
}

/* Hero Section */
.hero {
  padding: 6rem 0;
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -25%;
  right: -15%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, transparent 65%);
  border-radius: 50%;
  animation: float 12s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.10) 0%, transparent 65%);
  border-radius: 50%;
  animation: float 10s ease-in-out infinite reverse;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 80%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.hero-note {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* TUI Demo Section */
.tui-demo {
  padding: 6rem 0;
  background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
  position: relative;
}

.tui-demo::before {
  content: '';
  position: absolute;
  top: 5%;
  right: 5%;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}

.tui-demo::after {
  content: '';
  position: absolute;
  bottom: 10%;
  left: 0%;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 8s ease-in-out infinite reverse;
}

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

.tui-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: center;
}

.tui-text h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--color-text);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tui-text p {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--color-text-light);
  margin-bottom: 2rem;
}

.tui-features {
  margin-bottom: 2rem;
}

.tui-feature {
  margin-bottom: 1rem;
  font-size: 1rem;
  color: var(--color-text-light);
}

.tui-feature strong {
  color: var(--color-text);
  font-weight: 600;
}

.tui-install {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
}

.tui-install code {
  font-size: 0.875rem;
  color: var(--color-text);
}

.terminal-window {
  background: #1a1a1a;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
  transition: var(--transition);
}

.terminal-window:hover {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.terminal-header {
  background: #2d2d2d;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.terminal-buttons {
  display: flex;
  gap: 0.5rem;
}

.terminal-button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-close {
  background: #ff5f57;
}

.terminal-minimize {
  background: #ffbd2e;
}

.terminal-maximize {
  background: #28ca42;
}

.terminal-title {
  color: #ccc;
  font-size: 0.875rem;
  font-weight: 500;
}

.terminal-content {
  padding: 1.5rem;
  font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
  font-size: 0.8rem;
  line-height: 1.4;
  color: #e5e5e5;
  background: #1a1a1a;
  overflow-x: auto;
}

.terminal-content pre {
  margin: 0;
  white-space: pre;
}

.log-info {
  color: #4ade80;
  font-weight: 600;
}

.log-debug {
  color: #94a3b8;
  font-weight: 600;
}

.log-warn {
  color: #fbbf24;
  font-weight: 600;
}

.log-error {
  color: #f87171;
  font-weight: 600;
}

.terminal-cursor {
  color: #4ade80;
  animation: blink 1s infinite;
}

.filter-active {
  color: #60a5fa;
  font-weight: 600;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

@media (max-width: 768px) {
  .tui-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .tui-text {
    order: 2;
  }
  
  .tui-screenshot {
    order: 1;
  }
  
  .terminal-window {
    transform: none;
  }
  
  .tui-text h2 {
    font-size: 2rem;
  }
}

/* Features Grid */
.features-grid {
  padding: 5rem 0;
  position: relative;
}

.features-grid::before {
  content: '';
  position: absolute;
  top: 15%;
  left: 2%;
  width: 100px;
  height: 100px;
  background: linear-gradient(45deg, rgba(37, 99, 235, 0.05), rgba(139, 92, 246, 0.05));
  border-radius: 12px;
  transform: rotate(45deg);
  animation: float 8s ease-in-out infinite;
}

.features-grid::after {
  content: '';
  position: absolute;
  bottom: 25%;
  right: 3%;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, transparent 65%);
  border-radius: 50%;
  animation: float 6s ease-in-out infinite reverse;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  margin-bottom: 1rem;
}

.section-header p {
  font-size: 1.125rem;
  margin-bottom: 0;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 2rem;
  background: linear-gradient(135deg, var(--color-bg) 0%, rgba(248, 250, 252, 0.8) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.02) 0%, rgba(139, 92, 246, 0.02) 100%);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(37, 99, 235, 0.1);
  border-color: var(--color-primary-light);
}

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

.feature-icon {
  margin-bottom: 1.5rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.feature-card p {
  margin-bottom: 0;
  font-size: 0.875rem;
}

/* Integration Section */
.integrations {
  padding: 5rem 0;
  background-color: var(--color-bg-light);
}

.code-example {
  max-width: 800px;
  margin: 0 auto;
  background-color: #1e293b;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.code-tabs {
  display: flex;
  background-color: #0f172a;
  padding: 0.5rem;
  gap: 0.5rem;
}

.code-tab {
  padding: 0.5rem 1rem;
  background: none;
  border: none;
  color: #94a3b8;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius);
  transition: var(--transition);
}

.code-tab.active {
  background-color: #1e293b;
  color: white;
}

.code-block {
  padding: 2rem;
  overflow-x: auto;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.875rem;
  line-height: 1.5;
}

.code-block code {
  color: #e2e8f0;
}

.hidden {
  display: none;
}

/* CTA Section */
.cta-section {
  padding: 5rem 0;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-bg-light) 100%);
}

.cta-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.cta-content h2 {
  margin-bottom: 1rem;
}

.cta-content p {
  font-size: 1.125rem;
  margin-bottom: 2rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Footer */
.footer {
  background-color: var(--color-bg-light);
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.footer-description {
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background-color: var(--color-bg);
  color: var(--color-text-light);
  transition: var(--transition);
}

.footer-social a:hover {
  background-color: var(--color-primary);
  color: white;
}

.footer-section h3 {
  font-size: 1rem;
  margin-bottom: 1rem;
}

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

.footer-section ul li {
  margin-bottom: 0.75rem;
}

.footer-section ul li a {
  color: var(--color-text-light);
  font-size: 0.875rem;
  transition: var(--transition);
}

.footer-section ul li a:hover {
  color: var(--color-text);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 4rem;
    left: 0;
    right: 0;
    background-color: white;
    flex-direction: column;
    padding: 2rem;
    gap: 2rem;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
  }
  
  .nav-list {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-cta .btn {
    width: 100%;
    max-width: 300px;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-buttons .btn {
    width: 100%;
    max-width: 300px;
  }
}

/* Page Specific Styles */
.page-header {
  padding: 4rem 0;
  background-color: var(--color-bg-light);
  text-align: center;
}

.page-header h1 {
  margin-bottom: 1rem;
}

.page-header p {
  font-size: 1.125rem;
  margin-bottom: 0;
}

.page-content {
  padding: 4rem 0;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.pricing-card {
  padding: 2rem;
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.pricing-card.featured {
  border-color: var(--color-primary);
  transform: scale(1.05);
}

.pricing-card.featured::before {
  content: "Most Popular";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  color: white;
  padding: 0.25rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-4px);
}

.pricing-name {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-light);
}

.pricing-description {
  font-size: 0.875rem;
  margin-bottom: 2rem;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  padding: 0.5rem 0;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.pricing-features li::before {
  content: "✓";
  color: var(--color-primary);
  font-weight: 600;
  margin-right: 0.5rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-bg);
  transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.fade-in {
  animation: fadeIn 0.5s ease-in;
}

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