/* ============================================
   Landing Page Specific Styles
   ============================================ */

/* Header/Navigation - Linear Style */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(13, 13, 13, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.scrolled {
  background-color: rgba(13, 13, 13, 0.95);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color var(--transition-base);
  letter-spacing: -0.01em;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 14px;
  transition: background var(--transition-base);
}

.logo:hover .logo-icon {
  background: rgba(255, 255, 255, 0.15);
}

.nav-links {
  display: flex;
  gap: var(--space-8);
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 15px;
  font-family: var(--font-primary);
  transition: color var(--transition-fast);
  letter-spacing: -0.01em;
}

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

/* Hero Section - Linear Style */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 80px;
  background: var(--color-bg-primary);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 0%, rgba(94, 106, 210, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--color-text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-8);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: 72px;
  font-weight: 600;
  margin-bottom: var(--space-6);
  color: var(--color-text-primary);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero h1 .accent {
  color: var(--color-text-primary);
  display: inline;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-12);
  line-height: 1.6;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 400;
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* About Section - Linear Style */
.about-section {
  background-color: var(--color-bg-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.about-content {
  max-width: 1100px;
  margin: 0 auto;
}

.about-content h2 {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

.about-definition {
  font-size: 18px;
  text-align: center;
  margin-bottom: var(--space-16);
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.about-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-bottom: var(--space-16);
}

.about-block {
  padding: 40px 48px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  background-color: rgba(255, 255, 255, 0.02);
  transition: all var(--transition-base);
  width: 100%;
}

.about-block:hover {
  background-color: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.12);
}

.about-block h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.about-block p {
  line-height: 1.6;
  margin-bottom: 0;
  color: var(--color-text-secondary);
  font-size: 16px;
}

.about-statement {
  text-align: center;
  padding: 48px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
}

.about-statement h3 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.about-statement p {
  font-size: 17px;
  line-height: 1.7;
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

.about-tagline {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 0;
  margin-top: var(--space-8);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

/* Features Section - Linear Style */
.features {
  background-color: var(--color-bg-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--space-16);
}

.section-header h2 {
  font-size: 40px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

.section-header p {
  font-size: 18px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.section-badge {
  display: inline-block;
  padding: 6px 14px;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

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

.feature-card {
  background-color: rgba(255, 255, 255, 0.02);
  padding: 32px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--transition-base);
}

.feature-card:hover {
  background-color: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: var(--space-4);
}

.feature-card h3 {
  margin-bottom: var(--space-3);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.feature-card p {
  color: var(--color-text-secondary);
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.6;
}

/* Use Cases Section - Linear Style */
.use-cases {
  background-color: var(--color-bg-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.use-case-card {
  background-color: rgba(255, 255, 255, 0.02);
  padding: 32px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--transition-base);
}

.use-case-card:hover {
  background-color: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.use-case-card h4 {
  font-family: var(--font-display);
  font-weight: 600;
  margin-bottom: var(--space-3);
  font-size: 18px;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.use-case-card p {
  line-height: 1.6;
  color: var(--color-text-secondary);
  font-size: 15px;
}

/* How It Works Section - Linear Style */
.how-it-works {
  background-color: var(--color-bg-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
  position: relative;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 600;
  margin: 0 auto var(--space-4);
}

.step h3 {
  margin-bottom: var(--space-3);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.step p {
  color: var(--color-text-secondary);
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.6;
}

/* CTA Section - Linear Style */
.cta-section {
  background: var(--color-bg-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--color-text-primary);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(94, 106, 210, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  font-family: var(--font-display);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
  font-size: 40px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.cta-section p {
  font-size: 18px;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  position: relative;
  z-index: 1;
}

.cta-section .btn-primary {
  position: relative;
  z-index: 1;
}

/* Contact Form - Linear Style */
.contact-section {
  background-color: var(--color-bg-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.contact-container {
  max-width: 600px;
  margin: 0 auto;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
}

.success-message {
  padding: var(--space-4);
  background-color: var(--color-success);
  color: white;
  border-radius: var(--radius-base);
  text-align: center;
  margin-bottom: var(--space-6);
  display: none;
}

.success-message.show {
  display: block;
  animation: slideDown 0.3s ease-out;
}

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

/* Footer - Linear Style */
.footer {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  padding: var(--space-12) 0 var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-minimal {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-left h4 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.footer-left p {
  color: var(--color-text-secondary);
  margin: 0;
  font-size: 15px;
}

.footer-right {
  display: flex;
  gap: var(--space-6);
}

.footer-right a {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-family: var(--font-primary);
  font-size: 15px;
  letter-spacing: -0.01em;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: 14px;
}

.footer-bottom p {
  margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 48px;
  }
  
  .hero-subtitle {
    font-size: var(--text-lg);
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .nav-links {
    display: none;
  }
  
  .features-grid,
  .use-cases-grid,
  .steps {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-minimal {
    flex-direction: column;
    text-align: center;
    gap: var(--space-6);
  }
  
  .footer-right {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* Loading State */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}