:root {
  --color-primary: #2EA3F2;
  --color-accent: #58d5f7;
  --color-bg-dark: #0d1117;
  --color-bg-deep: #111b27;
  --color-bg-card: #161b22;
  --color-text: #ffffff;
  --color-text-muted: #8b949e;
  --color-vendor: #6B9080;
  --color-vendor-light: #A4C3B2;
  --color-ai-risk: #6B7FA6;
  --color-ai-risk-light: #9BB1D4;
  --color-threat: #B07A6B;
  --color-threat-light: #D4A99B;
  --font-main: 'Segoe UI', Arial, sans-serif;
  --container-width: 1100px;
  --radius: 12px;
  --radius-pill: 14px;
}

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

html {
  scroll-behavior: smooth;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--color-accent);
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== NAV ===== */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(139, 148, 158, 0.1);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.3px;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  color: var(--color-text-muted);
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Mobile nav toggle */
.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  cursor: pointer;
  width: 28px;
  height: 20px;
  position: relative;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text-muted);
  border-radius: 2px;
  position: absolute;
  transition: all 0.3s;
}

.nav-toggle-label span { top: 9px; }
.nav-toggle-label span::before { content: ''; top: -7px; }
.nav-toggle-label span::after { content: ''; top: 7px; }

/* ===== HERO ===== */

.hero {
  padding: 60px 0 50px;
  background: linear-gradient(135deg, var(--color-bg-dark), var(--color-bg-deep), var(--color-bg-dark));
  text-align: center;
}

.hero-banner {
  width: 100%;
  max-width: 900px;
  margin: 0 auto 32px;
}

.hero h1 {
  font-size: 28px;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  letter-spacing: -0.3px;
}

.hero h1 strong {
  color: var(--color-text);
  font-weight: 700;
}

.hero-cta {
  display: inline-block;
  padding: 12px 32px;
  background: var(--color-primary);
  color: var(--color-text);
  font-size: 15px;
  font-weight: 600;
  border-radius: 24px;
  transition: background 0.2s, transform 0.2s;
  margin-bottom: 24px;
}

.hero-cta:hover {
  background: var(--color-accent);
  color: var(--color-bg-dark);
  transform: translateY(-1px);
}

.hero-subtitle {
  font-size: 16px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.hero-badges {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== SECTIONS ===== */

.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--color-bg-deep);
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  letter-spacing: -0.5px;
}

/* ===== AGENTS CARDS ===== */

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

.agent-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid rgba(139, 148, 158, 0.1);
  transition: border-color 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
}

.agent-card:hover {
  transform: translateY(-2px);
}

.agent-card--vendor { border-top: 4px solid var(--color-vendor); }
.agent-card--vendor:hover { border-color: var(--color-vendor); }
.agent-card--ai { border-top: 4px solid var(--color-ai-risk); }
.agent-card--ai:hover { border-color: var(--color-ai-risk); }
.agent-card--threat { border-top: 4px solid var(--color-threat); }
.agent-card--threat:hover { border-color: var(--color-threat); }

.agent-card img {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
}

.agent-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.agent-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
  flex-grow: 1;
  margin-bottom: 16px;
}

.agent-card-link {
  font-size: 14px;
  font-weight: 600;
}

.agent-card-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  border: 1px solid rgba(139, 148, 158, 0.25);
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  letter-spacing: 0.3px;
}

/* ===== HOW IT WORKS ===== */

.how-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.how-item {
  text-align: center;
  padding: 24px 16px;
}

.how-item h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-accent);
}

.how-item p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ===== FRAMEWORKS ===== */

.frameworks-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.framework-pill {
  display: inline-block;
  padding: 8px 18px;
  background: rgba(46, 163, 242, 0.12);
  border: 1px solid rgba(46, 163, 242, 0.25);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-accent);
}

/* ===== BIO ===== */

.bio-card {
  max-width: 700px;
  margin: 0 auto;
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  border: 1px solid rgba(139, 148, 158, 0.1);
}

.bio-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.bio-card p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.bio-links {
  display: flex;
  gap: 20px;
  justify-content: center;
}

.bio-links a {
  font-size: 14px;
  font-weight: 500;
}

/* ===== FOOTER ===== */

.footer {
  padding: 40px 0;
  background: var(--color-bg-dark);
  border-top: 1px solid rgba(139, 148, 158, 0.1);
  text-align: center;
}

.footer p {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.footer a {
  color: var(--color-text-muted);
  font-weight: 500;
}

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

.footer-disclaimer {
  margin-top: 16px;
  font-size: 12px;
  color: rgba(139, 148, 158, 0.6);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== RESPONSIVE ===== */

@media (max-width: 900px) {
  .agents-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .how-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .nav-toggle-label {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(13, 17, 23, 0.98);
    padding: 16px 24px;
    gap: 16px;
    border-bottom: 1px solid rgba(139, 148, 158, 0.1);
  }

  .nav-toggle:checked ~ .nav-links {
    display: flex;
  }

  .agents-grid {
    grid-template-columns: 1fr;
  }

  .how-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 22px;
  }

  .section {
    padding: 48px 0;
  }

  .bio-card {
    padding: 28px 20px;
  }
}