/* AmpAgent Theme — Dark, musical, urgent */
:root {
  --bg: #080810;
  --bg-2: #0f0f1a;
  --surface: #141420;
  --fg: #e8e4df;
  --fg-muted: #8a8699;
  --accent: #e63946;
  --accent-glow: rgba(230, 57, 70, 0.15);
  --wave: #e63946;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.5rem 3rem;
  display: flex;
  align-items: center;
  background: rgba(8, 8, 16, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.wordmark {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--fg);
}

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 3rem 0;
  position: relative;
  overflow: hidden;
}
.hero-inner { max-width: 840px; }
.hero-tag {
  display: inline-block;
  font-family: 'Syne', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid rgba(230,57,70,0.3);
  border-radius: 2rem;
}
.hero h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(3rem, 6.5vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.75rem;
  color: var(--fg);
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.lede {
  font-size: 1.125rem;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 3rem;
}
.hero-stats { display: flex; gap: 2rem; flex-wrap: wrap; }
.stat { max-width: 320px; }
.stat-num {
  font-family: 'Syne', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--fg);
  display: block;
  letter-spacing: -0.04em;
}
.stat-desc {
  font-size: 0.875rem;
  color: var(--fg-muted);
  line-height: 1.5;
}
.hero-waveform {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 80px;
  opacity: 0.6;
}
.hero-waveform svg { width: 100%; height: 100%; }
.wave { animation: waveFloat 8s ease-in-out infinite; }
.wave-2 { animation-delay: -3s; animation-duration: 11s; }
.wave-3 { animation-delay: -6s; animation-duration: 14s; }
@keyframes waveFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* WHAT */
.what { padding: 8rem 3rem; background: var(--bg-2); }
.what-inner { max-width: 840px; margin: 0 auto; }
.what-label {
  font-family: 'Syne', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 1.25rem;
}
.what h2 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  line-height: 1.15;
}
.what-body {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.75;
  margin-bottom: 3rem;
}
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.split-label {
  font-family: 'Syne', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.split-list { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.split-list li {
  font-size: 0.925rem;
  color: var(--fg-muted);
  padding-left: 1.25rem;
  position: relative;
}
.split-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.55em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--fg-muted);
}
.split-col:first-child .split-list li::before { background: var(--accent); }

/* FEATURES */
.features { padding: 8rem 3rem; background: var(--bg); }
.features-inner { max-width: 900px; margin: 0 auto; }
.features-label {
  font-family: 'Syne', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 3rem;
}
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5px; background: rgba(255,255,255,0.04); }
.feature {
  background: var(--bg);
  padding: 2.5rem;
}
.feature-icon {
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.feature h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}
.feature p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* MANIFESTO */
.manifesto { padding: 8rem 3rem; background: var(--bg-2); }
.manifesto-inner { max-width: 720px; margin: 0 auto; }
blockquote {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.5rem, 2.8vw, 2.25rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 2.5rem;
  padding-left: 2rem;
  border-left: 3px solid var(--accent);
}
.manifesto p {
  font-size: 1rem;
  color: var(--fg-muted);
  line-height: 1.8;
  margin-bottom: 1.25rem;
}
.manifesto-sub {
  font-size: 0.9rem;
  color: rgba(138, 134, 153, 0.7);
}

/* FOOTER */
footer { padding: 4rem 3rem; border-top: 1px solid rgba(255,255,255,0.04); }
.footer-inner { max-width: 900px; margin: 0 auto; display: flex; justify-content: space-between; align-items: flex-end; }
.footer-wordmark {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  display: block;
  margin-bottom: 0.5rem;
}
.footer-tagline { font-size: 0.85rem; color: var(--fg-muted); }
.footer-note {
  font-family: 'Syne', sans-serif;
  font-size: 0.85rem;
  color: rgba(138, 134, 153, 0.5);
  text-align: right;
  max-width: 220px;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  nav { padding: 1.25rem 1.5rem; }
  .hero { padding: 7rem 1.5rem 0; }
  .what, .features, .manifesto { padding: 5rem 1.5rem; }
  .split { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 1.5rem; }
  .footer-note { text-align: left; }
  blockquote { padding-left: 1.25rem; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 2.5rem; }
  .hero-stats { flex-direction: column; }
}