:root {
  color-scheme: light;
  /* Match app light theme (public/index.html) */
  --bg: #f7f7f7;
  --surface: #ffffff;
  --surface-hover: #f0f0f0;
  --border: #e0e0e0;
  --border-strong: #d4d4d4;
  --text: #0a0a0a;
  --muted: #737373;
  --accent: #0a0a0a;
  --accent-hover: #262626;
  --on-accent: #ffffff;
  --hover-bg: #f0f0f0;
  --preview-bg: #ebebeb;
  --wave: #fdd835;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 8px 24px rgba(0, 0, 0, 0.05);
  /* Black chrome for nav + footer */
  --chrome-bg: #0a0a0a;
  --chrome-text: #f5f5f5;
  --chrome-muted: #a3a3a3;
  --chrome-border: #262626;
  --chrome-hover: #1a1a1a;
  --shell: 1180px;
  --header-h: 64px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Instrument Sans", system-ui, sans-serif;
  font-size: 1.05rem;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

main { position: relative; z-index: 1; }

.shell {
  width: min(var(--shell), 100% - 48px);
  margin: 0 auto;
}

/* Wordmark — matches app */
.logo {
  font-family: "Instrument Sans", sans-serif;
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}

.logo-mark {
  width: 1.2em;
  height: 1.2em;
  display: block;
  filter: invert(1);
  flex-shrink: 0;
}

.logo-track { color: var(--text); }
.logo-vis { color: var(--text); }

.logo-footer {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  opacity: 0.9;
}

/* Black header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  border-bottom: 1px solid var(--chrome-border);
  background: var(--chrome-bg);
}

.site-header-inner {
  width: min(var(--shell), 100% - 48px);
  margin: 0 auto;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.site-header .logo-track { color: var(--chrome-text); }
.site-header .logo-vis { color: var(--chrome-text); }

.badge-beta {
  font-family: "Pixelify Sans", monospace;
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 10px;
  background: var(--bg);
}

.site-header .badge-beta {
  color: var(--chrome-muted);
  border-color: var(--chrome-border);
  background: var(--chrome-hover);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a:not(.btn) {
  font-size: 0.95rem;
  color: var(--chrome-muted);
  padding: 8px 12px;
  border-radius: 999px;
  transition: color 0.15s, background 0.15s;
}

.site-nav a:not(.btn):hover {
  color: var(--chrome-text);
  background: var(--chrome-hover);
}

.nav-toggle {
  display: none;
  background: var(--chrome-hover);
  border: 1px solid var(--chrome-border);
  border-radius: 6px;
  color: var(--chrome-text);
  padding: 8px 12px;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 24px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: transform 0.15s, background 0.15s, border-color 0.15s, color 0.15s;
  white-space: nowrap;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.site-header .btn-primary {
  background: linear-gradient(100deg, #ff6b8b, #d946ef);
  color: #fff;
  border-color: transparent;
  font-size: 0.95rem;
  padding: 10px 20px;
}

.site-header .btn-primary:hover {
  background: linear-gradient(100deg, #ff5277, #c72be0);
  border-color: transparent;
}

.btn-ghost {
  color: var(--text);
  border-color: var(--border);
  background: var(--surface);
}

.btn-ghost:hover {
  border-color: var(--text);
  background: var(--hover-bg);
}

.btn-sm { padding: 10px 18px; font-size: 0.8rem; }

.section-label {
  font-family: "Pixelify Sans", monospace;
  font-size: 0.88rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin-bottom: 16px;
}

.section-lead {
  color: var(--muted);
  max-width: 560px;
  font-size: 1.15rem;
  line-height: 1.55;
}

.section-head { margin-bottom: 36px; }
.section-head.center { text-align: center; }
.section-head.center .section-lead { margin: 0 auto; }

.band {
  width: 100%;
  padding: 72px 0;
}

.band-tight { padding: 48px 0; }

.band-raised {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* Black footer */
.site-footer {
  width: 100%;
  border-top: 1px solid var(--chrome-border);
  background: var(--chrome-bg);
  color: var(--chrome-muted);
  padding: 56px 0 32px;
  position: relative;
  z-index: 1;
}

.site-footer .logo-track { color: var(--chrome-text); }
.site-footer .logo-vis { color: var(--chrome-text); }

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px 24px;
  margin-bottom: 48px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--chrome-text);
  margin-bottom: 14px;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 10px;
}

.footer-col a,
.footer-col li {
  font-size: 0.95rem;
  color: var(--chrome-muted);
}

.footer-col a:hover { color: var(--chrome-text); }

.footer-brand p {
  font-size: 0.95rem;
  color: var(--chrome-muted);
  max-width: 280px;
  margin-top: 14px;
  line-height: 1.5;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  border-top: 1px solid var(--chrome-border);
  font-size: 0.92rem;
  color: var(--chrome-muted);
}

.footer-bottom nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom a:hover { color: var(--chrome-text); }

.footer-wordmark {
  padding-top: 40px;
  text-align: center;
  opacity: 0.18;
}

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 20px;
    background: var(--chrome-bg);
    border-bottom: 1px solid var(--chrome-border);
    gap: 4px;
  }

  .site-nav.open { display: flex; }

  .site-nav a:not(.btn) { padding: 12px; }

  .site-nav .btn { width: 100%; margin-top: 8px; }

  .header-left .badge-beta { display: none; }

  .band { padding: 52px 0; }
}

@media (max-width: 480px) {
  .shell { width: min(var(--shell), 100% - 32px); }
  .site-header-inner { width: min(var(--shell), 100% - 32px); }
}