/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #1f2937;
  background: #fafafa;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  color: #111827;
}

/* === Theme Variables === */
:root {
  --color-primary: #4F46E5;
  --color-primary-dark: #4338CA;
  --color-accent: #818CF8;
  --gradient-hero: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
  --color-surface: #EEF2FF;
  --color-card-border: #E0E7FF;
}

:root[data-domain="aivetops"] {
  --color-primary: #4F46E5;
  --color-primary-dark: #4338CA;
  --color-accent: #818CF8;
  --gradient-hero: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
  --color-surface: #EEF2FF;
  --color-card-border: #E0E7FF;
}

:root[data-domain="hrisagent"] {
  --color-primary: #1E40AF;
  --color-primary-dark: #1E3A8A;
  --color-accent: #60A5FA;
  --gradient-hero: linear-gradient(135deg, #1E40AF 0%, #3B82F6 100%);
  --color-surface: #EFF6FF;
  --color-card-border: #DBEAFE;
}

:root[data-domain="slaagent"] {
  --color-primary: #0D9488;
  --color-primary-dark: #0F766E;
  --color-accent: #34D399;
  --gradient-hero: linear-gradient(135deg, #0D9488 0%, #059669 100%);
  --color-surface: #F0FDFA;
  --color-card-border: #CCFBF1;
}

:root[data-domain="csatagent"] {
  --color-primary: #D97706;
  --color-primary-dark: #B45309;
  --color-accent: #FBBF24;
  --gradient-hero: linear-gradient(135deg, #D97706 0%, #EA580C 100%);
  --color-surface: #FFF7ED;
  --color-card-border: #FFEDD5;
}

/* === Nav === */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid #e5e7eb;
}

.nav-inner {
  display: flex;
  align-items: center;
  height: 56px;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

/* === Hero === */
.hero {
  background: var(--gradient-hero);
  color: #fff;
  padding: 100px 0 80px;
  text-align: center;
}

.hero-tagline {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.2rem;
  opacity: 0.92;
  max-width: 620px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

/* === CTA Button === */
.cta-btn {
  display: inline-block;
  background: #fff;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 36px;
  border-radius: 8px;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s;
}

.cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
}

/* === Features === */
.features {
  padding: 80px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--color-card-border);
  border-radius: 12px;
  padding: 32px 24px;
  transition: transform 0.15s, box-shadow 0.15s;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #111827;
}

.feature-card p {
  color: #6b7280;
  font-size: 0.93rem;
  line-height: 1.6;
}

/* === Status === */
.status {
  padding: 80px 0;
  background: #f9fafb;
}

.status-content {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
  color: #4b5563;
  font-size: 1.05rem;
  line-height: 1.8;
}

.status-content p + p {
  margin-top: 16px;
}

/* === Acquisition === */
.acquisition {
  padding: 80px 0;
  text-align: center;
}

.acquisition-text {
  max-width: 640px;
  margin: 0 auto 24px;
  color: #4b5563;
  font-size: 1.05rem;
  line-height: 1.8;
}

.acquisition-cta {
  font-size: 0.9rem;
  color: #9ca3af;
  margin-bottom: 8px;
}

.email-link {
  display: inline-block;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  padding: 10px 24px;
  border: 2px solid var(--color-card-border);
  border-radius: 8px;
  transition: background 0.15s;
}

.email-link:hover {
  background: var(--color-surface);
}

/* === Footer === */
.footer {
  padding: 32px 0;
  border-top: 1px solid #e5e7eb;
  color: #9ca3af;
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.footer a {
  color: #6b7280;
  text-decoration: none;
}

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

/* === noscript === */
.noscript-banner {
  background: #fef3c7;
  border-bottom: 1px solid #fcd34d;
  padding: 12px 24px;
  text-align: center;
  font-size: 0.9rem;
  color: #92400e;
}

.noscript-banner a {
  color: #92400e;
  font-weight: 600;
}

/* === Responsive === */
@media (max-width: 768px) {
  .hero {
    padding: 64px 0 48px;
  }

  .hero-tagline {
    font-size: 1.9rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .features,
  .status,
  .acquisition {
    padding: 56px 0;
  }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .section-title {
    font-size: 1.45rem;
    margin-bottom: 32px;
  }
}