/**
 * Stella Landing Page Styles
 * AI-native dark theme using design tokens from variables.css
 */

/* Reset */
body, main { padding: 0 !important; margin: 0 !important; }

/* Navbar */
.landing-nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: var(--z-sticky);
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-4) var(--space-8);
  background: rgba(11, 15, 26, 0.8);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.landing-nav-brand {
  display: flex; align-items: center; gap: var(--space-3);
  text-decoration: none; color: var(--color-text-primary);
  font-weight: var(--weight-bold); font-size: var(--text-lg);
}
.landing-nav-brand .sphere-logo { width: 36px; height: 36px; }
.landing-nav-links {
  display: flex; align-items: center; gap: var(--space-6);
  list-style: none; margin: 0; padding: 0;
}
.landing-nav-links a {
  color: var(--color-text-secondary); text-decoration: none;
  font-size: var(--text-sm); font-weight: var(--weight-medium);
  transition: color var(--transition-fast);
}
.landing-nav-links a:hover { color: var(--color-text-primary); }
.landing-nav-links .landing-btn-primary { color: var(--color-primary-text); }

/* Hero */
.landing-hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center; padding: var(--space-16) var(--space-6);
}
.landing-hero-inner { max-width: 800px; margin: 0 auto; position: relative; z-index: 1; }
.landing-hero-logo { width: 96px; height: 96px; margin: 0 auto var(--space-8); }
.landing-hero-logo .sphere-logo { width: 96px; height: 96px; }
.landing-hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.75rem); font-weight: var(--weight-bold);
  line-height: var(--leading-tight); color: var(--color-text-primary);
  margin: 0 0 var(--space-6);
}
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-light));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.landing-hero-sub {
  font-size: var(--text-lg); color: var(--color-text-secondary);
  line-height: var(--leading-relaxed); margin-bottom: var(--space-10);
  max-width: 600px; margin-left: auto; margin-right: auto;
}
.landing-hero-cta {
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-4); flex-wrap: wrap;
}

/* CTA Buttons */
.landing-btn-primary {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  background: linear-gradient(135deg, var(--color-primary), var(--color-ai));
  color: #fff; border: none; border-radius: var(--radius-lg);
  font-size: var(--text-base); font-weight: var(--weight-semibold);
  text-decoration: none; cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-base);
  box-shadow: var(--shadow-glow-primary);
}
.landing-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.3); color: #fff;
}
.landing-btn-secondary {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-8); background: transparent;
  color: var(--color-text-primary); border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg); font-size: var(--text-base);
  font-weight: var(--weight-semibold); text-decoration: none; cursor: pointer;
  transition: border-color var(--transition-base), background var(--transition-base);
}
.landing-btn-secondary:hover {
  border-color: var(--color-primary); background: var(--color-primary-50);
  color: var(--color-text-primary);
}
/* Section Base */
.landing-section { padding: var(--space-16) var(--space-6); position: relative; }
.landing-section-inner { max-width: 1100px; margin: 0 auto; }
.landing-section-header { text-align: center; margin-bottom: var(--space-12); }
.landing-section-header h2 {
  font-size: var(--text-3xl); font-weight: var(--weight-bold);
  color: var(--color-text-primary); margin: var(--space-4) 0 var(--space-3);
}
.landing-section-header p {
  color: var(--color-text-secondary); font-size: var(--text-md);
  max-width: 600px; margin: 0 auto;
}
.landing-section-label {
  display: inline-block; padding: var(--space-1) var(--space-4);
  background: var(--color-ai-surface); border: 1px solid var(--color-ai-border);
  border-radius: var(--radius-full); font-size: var(--text-xs);
  font-weight: var(--weight-semibold); color: var(--color-ai-light);
  text-transform: uppercase; letter-spacing: 0.05em;
}

/* Feature Grid */
.landing-features {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}
.landing-feature-card {
  background: var(--color-bg-elevated); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); padding: var(--space-8);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.landing-feature-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-lg);
  border-color: var(--color-border-strong);
}
.landing-feature-icon {
  width: 48px; height: 48px; border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  font-size: var(--text-xl); margin-bottom: var(--space-5);
}
.landing-feature-icon.icon-purple { background: rgba(139, 92, 246, 0.12); color: var(--color-ai-light); }
.landing-feature-icon.icon-cyan { background: rgba(6, 182, 212, 0.12); color: var(--color-accent-light); }
.landing-feature-icon.icon-green { background: var(--color-success-bg); color: var(--color-success-light); }
.landing-feature-icon.icon-amber { background: var(--color-warning-bg); color: var(--color-warning-light); }
.landing-feature-icon.icon-blue { background: var(--color-info-bg); color: var(--color-info-light); }
.landing-feature-icon.icon-red { background: var(--color-danger-bg); color: var(--color-danger-light); }
.landing-feature-card h3 {
  font-size: var(--text-md); font-weight: var(--weight-semibold);
  color: var(--color-text-primary); margin: 0 0 var(--space-2);
}
.landing-feature-card p {
  font-size: var(--text-sm); color: var(--color-text-secondary);
  line-height: var(--leading-relaxed); margin: 0;
}
.feature-tag {
  display: inline-block; padding: 2px var(--space-2);
  background: var(--color-ai-surface); border: 1px solid var(--color-ai-border);
  border-radius: var(--radius-full); font-size: var(--text-xs);
  font-weight: var(--weight-medium); color: var(--color-ai-light);
  margin-top: var(--space-3);
}

/* AI Spotlight */
.landing-spotlight {
  background: var(--color-bg-elevated); border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl); padding: var(--space-12); margin-top: var(--space-16);
}
.landing-spotlight-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-10); align-items: center;
}
.landing-spotlight-text h2 {
  font-size: var(--text-2xl); font-weight: var(--weight-bold);
  color: var(--color-text-primary); margin: 0 0 var(--space-4);
}
.landing-spotlight-text > p {
  color: var(--color-text-secondary); font-size: var(--text-base);
  line-height: var(--leading-relaxed); margin: 0 0 var(--space-6);
}
.landing-spotlight-list {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: var(--space-3);
}
.landing-spotlight-list li {
  display: flex; align-items: center; gap: var(--space-3);
  color: var(--color-text-secondary); font-size: var(--text-sm);
}
.landing-spotlight-list li i { color: var(--color-success); font-size: var(--text-xs); flex-shrink: 0; }
/* Copilot Mock */
.landing-copilot-mock {
  background: var(--color-bg-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); overflow: hidden;
}
.landing-mock-bar {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-base); border-bottom: 1px solid var(--color-border);
}
.landing-mock-bar .dot {
  width: 8px; height: 8px; border-radius: var(--radius-full);
  background: var(--color-ai); animation: neuron-pulse 2s ease-in-out infinite;
}
.landing-mock-bar .dot:nth-child(2) { animation-delay: 0.3s; }
.landing-mock-bar .dot:nth-child(3) { animation-delay: 0.6s; }
.landing-mock-bar span {
  font-size: var(--text-xs); color: var(--color-text-tertiary); margin-left: var(--space-2);
}
.landing-mock-body {
  padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-4);
}
.landing-mock-msg {
  padding: var(--space-3) var(--space-4); border-radius: var(--radius-lg);
  font-size: var(--text-sm); line-height: var(--leading-relaxed);
}
.landing-mock-msg.customer {
  background: var(--color-bg-base); color: var(--color-text-secondary);
  border: 1px solid var(--color-border); align-self: flex-start; max-width: 85%;
}
.landing-mock-msg.ai-draft {
  background: var(--color-ai-surface); border: 1px solid var(--color-ai-border);
  color: var(--color-text-primary); position: relative; padding-top: var(--space-6);
}
.landing-mock-msg.ai-draft::before {
  content: "AI Draft"; position: absolute;
  top: var(--space-2); left: var(--space-4);
  font-size: var(--text-xs); font-weight: var(--weight-semibold);
  color: var(--color-ai-light); text-transform: uppercase; letter-spacing: 0.05em;
}
.landing-mock-actions { display: flex; gap: var(--space-2); padding: 0 var(--space-1); }
.landing-mock-actions .accept,
.landing-mock-actions .edit {
  display: inline-flex; align-items: center; gap: var(--space-1);
  padding: var(--space-1) var(--space-3); border-radius: var(--radius-full);
  font-size: var(--text-xs); font-weight: var(--weight-medium); cursor: default;
}
.landing-mock-actions .accept {
  background: var(--color-success-bg); color: var(--color-success-light);
  border: 1px solid var(--color-success-border);
}
.landing-mock-actions .edit {
  background: var(--color-secondary-bg); color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

/* How It Works */
.landing-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-8); }
.landing-step { text-align: center; }
.landing-step-number {
  width: 56px; height: 56px; border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-ai));
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto var(--space-5); font-size: var(--text-xl);
  font-weight: var(--weight-bold); color: #fff; box-shadow: var(--shadow-glow-primary);
}
.landing-step h3 {
  font-size: var(--text-md); font-weight: var(--weight-semibold);
  color: var(--color-text-primary); margin: 0 0 var(--space-2);
}
.landing-step p {
  color: var(--color-text-secondary); font-size: var(--text-sm);
  line-height: var(--leading-relaxed); margin: 0;
}

/* Migration Banner */
.landing-migration {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
  border: 1px solid var(--color-ai-border); border-radius: var(--radius-2xl);
  padding: var(--space-10) var(--space-8); margin-top: var(--space-16);
}
.landing-migration-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-6); flex-wrap: wrap;
}
.landing-migration-inner h3 {
  font-size: var(--text-xl); font-weight: var(--weight-semibold);
  color: var(--color-text-primary); margin: 0;
}
.landing-migration-inner p {
  color: var(--color-text-secondary); font-size: var(--text-sm);
  margin: var(--space-2) 0 0;
}
.landing-migration-logos { display: flex; align-items: center; gap: var(--space-3); }
.landing-migration-logo {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4); background: var(--color-bg-surface);
  border: 1px solid var(--color-border); border-radius: var(--radius-full);
  font-size: var(--text-sm); color: var(--color-text-secondary);
  font-weight: var(--weight-medium);
}
/* Pricing */
.landing-pricing {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6); max-width: 960px; margin: 0 auto;
}
.landing-price-card {
  background: var(--color-bg-elevated); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); padding: var(--space-8); position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.landing-price-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.landing-price-card.featured {
  border-color: var(--color-primary); box-shadow: var(--shadow-glow-primary);
}
.landing-price-card.featured::after {
  content: "Most Popular"; position: absolute;
  top: calc(-1 * var(--space-3)); left: 50%; transform: translateX(-50%);
  padding: var(--space-1) var(--space-4);
  background: linear-gradient(135deg, var(--color-primary), var(--color-ai));
  color: #fff; font-size: var(--text-xs); font-weight: var(--weight-semibold);
  border-radius: var(--radius-full); white-space: nowrap;
}
.landing-price-card h3 {
  font-size: var(--text-lg); font-weight: var(--weight-semibold);
  color: var(--color-text-primary); margin: 0 0 var(--space-2);
}
.price {
  font-size: var(--text-4xl); font-weight: var(--weight-bold);
  color: var(--color-text-primary); margin: var(--space-4) 0;
}
.price span {
  font-size: var(--text-sm); font-weight: var(--weight-normal);
  color: var(--color-text-tertiary);
}
.landing-price-card > p {
  color: var(--color-text-secondary); font-size: var(--text-sm);
  margin: 0 0 var(--space-6);
}
.landing-price-features {
  list-style: none; padding: 0; margin: 0 0 var(--space-8);
  display: flex; flex-direction: column; gap: var(--space-3);
}
.landing-price-features li {
  display: flex; align-items: center; gap: var(--space-2);
  color: var(--color-text-secondary); font-size: var(--text-sm);
}
.landing-price-features li i {
  color: var(--color-success); font-size: var(--text-xs); flex-shrink: 0;
}

/* Footer */
.landing-footer {
  border-top: 1px solid var(--color-border); padding: var(--space-10) var(--space-6);
}
.landing-footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: var(--space-4);
}
.landing-footer-brand {
  display: flex; align-items: center; gap: var(--space-3);
  color: var(--color-text-tertiary); font-size: var(--text-sm);
}
.landing-footer-brand .sphere-logo { width: 24px; height: 24px; }
.landing-footer-links {
  display: flex; gap: var(--space-6); list-style: none; margin: 0; padding: 0;
}
.landing-footer-links a {
  color: var(--color-text-tertiary); text-decoration: none;
  font-size: var(--text-sm); transition: color var(--transition-fast);
}
.landing-footer-links a:hover { color: var(--color-text-primary); }

/* Scroll Fade-In Animation */
.landing-fade-in {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.landing-fade-in.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .landing-fade-in { opacity: 1; transform: none; transition: none; }
}

/* Final CTA */
.landing-final-cta { text-align: center; padding: var(--space-16) var(--space-6); }
.landing-final-cta h2 {
  font-size: var(--text-3xl); font-weight: var(--weight-bold);
  color: var(--color-text-primary); margin: 0 0 var(--space-6);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .landing-nav-links { display: none; }
  .landing-nav { padding: var(--space-3) var(--space-4); }
  .landing-hero { padding: calc(var(--space-16) + 56px) var(--space-4) var(--space-16); }
  .landing-features { grid-template-columns: 1fr; }
  .landing-spotlight-grid { grid-template-columns: 1fr; }
  .landing-spotlight { padding: var(--space-8) var(--space-5); }
  .landing-steps { grid-template-columns: 1fr; gap: var(--space-10); }
  .landing-pricing { grid-template-columns: 1fr; }
  .landing-migration-inner { flex-direction: column; text-align: center; }
  .landing-footer-inner { flex-direction: column; text-align: center; }
}