/* TabEverywhere — Design System */
:root {
  --color-bg: #0a0a0f;
  --color-surface: #12121a;
  --color-surface-2: #1a1a24;
  --color-border: #2a2a3a;
  --color-text: #ffffff;
  --color-text-muted: #8888a0;
  --color-text-subtle: #555566;
  --color-primary: #6366f1;
  --color-primary-hover: #818cf8;
  --color-accent: #22d3ee;
  --color-success: #34d399;
  --color-ghost: #6366f180;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  
  --transition: 0.2s ease;
}

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Layout */
.app {
  min-height: 100vh;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--transition);
}

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

.download-btn {
  background: var(--color-primary);
  color: white;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all var(--transition);
}

.download-btn:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

/* Hero */
.hero {
  text-align: center;
  padding: 160px 40px 100px;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  padding: 8px 16px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 16px;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  padding: 14px 28px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.btn-secondary:hover {
  background: var(--color-surface-2);
  border-color: var(--color-text-muted);
}

.hero-note {
  font-size: 0.875rem;
  color: var(--color-text-subtle);
}

/* Demo Section */
.demo-section {
  padding: 80px 40px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.demo-section h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.demo-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 48px;
}

.demo-subtitle kbd {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  padding: 3px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.demo-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 32px;
  max-width: 1000px;
  margin: 0 auto;
}

.demo-window {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.window-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}

.window-dots {
  display: flex;
  gap: 8px;
}

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

.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.window-title {
  flex: 1;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.window-content {
  padding: 20px;
}

/* Email Demo */
.email-demo .email-field {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.email-demo label {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  width: 60px;
}

.email-demo input[readonly] {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 0.95rem;
}

.email-body {
  margin-top: 16px;
}

.input-wrapper {
  position: relative;
}

.input-wrapper textarea,
.input-wrapper input {
  width: 100%;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: 0.95rem;
  color: var(--color-text);
  font-family: var(--font-sans);
  resize: none;
  transition: border-color var(--transition);
}

.input-wrapper textarea:focus,
.input-wrapper input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.ghost-text {
  position: absolute;
  top: 12px;
  left: 12px;
  color: var(--color-ghost);
  font-size: 0.95rem;
  pointer-events: none;
  white-space: pre-wrap;
  font-family: var(--font-sans);
}

.demo-hint {
  margin-top: 12px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-subtle);
}

.hint-key {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* Slack Demo */
.slack-demo {
  display: flex;
  flex-direction: column;
  min-height: 260px;
}

.slack-messages {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 16px;
}

.slack-message {
  display: flex;
  gap: 12px;
}

.slack-avatar {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
}

.slack-content {
  flex: 1;
}

.slack-name {
  font-weight: 600;
  font-size: 0.9rem;
  margin-right: 8px;
}

.slack-content p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-top: 2px;
}

.slack-input-container {
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}

.slack-input-container input {
  border-radius: var(--radius-md);
}

/* Features */
.features-section {
  padding: 100px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.features-section h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 60px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.feature-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* How It Works */
.how-it-works {
  padding: 100px 40px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.how-it-works h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 60px;
}

.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.step {
  flex: 1;
  min-width: 200px;
  text-align: center;
  padding: 32px;
}

.step-number {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 auto 16px;
}

.step h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.step p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.step-arrow {
  font-size: 2rem;
  color: var(--color-text-muted);
}

/* Pricing */
.pricing-section {
  padding: 100px 40px;
  max-width: 1100px;
  margin: 0 auto;
}

.pricing-section h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 60px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 40px rgba(99, 102, 241, 0.2);
}

.featured-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: white;
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
}

.pricing-card h3 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.price {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 24px;
}

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

.pricing-card ul {
  list-style: none;
  text-align: left;
  margin-bottom: 32px;
}

.pricing-card li {
  padding: 8px 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.pricing-card li.disabled {
  color: var(--color-text-subtle);
}

.btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--color-text);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.btn-outline:hover {
  background: var(--color-surface-2);
  border-color: var(--color-text-muted);
}

/* CTA */
.cta-section {
  padding: 100px 40px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 100%);
}

.cta-section h2 {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--color-text-muted);
  margin-bottom: 32px;
  font-size: 1.1rem;
}

.btn-large {
  padding: 18px 40px;
  font-size: 1.1rem;
}

/* Footer */
.footer {
  padding: 40px;
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.footer-note {
  text-align: center;
  color: var(--color-text-subtle);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
  .header {
    padding: 16px 20px;
  }
  
  .nav {
    display: none;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .demo-container {
    grid-template-columns: 1fr;
  }
  
  .steps {
    flex-direction: column;
  }
  
  .step-arrow {
    transform: rotate(90deg);
  }
  
  .footer-content {
    flex-direction: column;
    gap: 24px;
  }
}