:root {
  /* surfaces */
  --pf-bg-base: oklch(0.18 0.012 250);
  --pf-bg-surface: oklch(0.215 0.012 250);
  --pf-bg-elevated: oklch(0.245 0.012 250);
  --pf-bg-panel: oklch(0.28 0.012 250);
  --pf-bg-hover: oklch(0.27 0.012 250);
  /* borders */
  --pf-border-subtle: oklch(0.30 0.012 250);
  --pf-border-default: oklch(0.36 0.012 250);
  /* text */
  --pf-text-primary: oklch(0.95 0.005 250);
  --pf-text-secondary: oklch(0.78 0.01 250);
  --pf-text-muted: oklch(0.55 0.01 250);
  /* accents */
  --pf-accent: oklch(0.65 0.18 250);
  --pf-accent-dim: oklch(0.35 0.10 250);
  --pf-ai: oklch(0.65 0.16 195);
  --pf-ai-dim: oklch(0.30 0.10 195);
  --pf-forge: oklch(0.72 0.17 58);
  --pf-success: oklch(0.65 0.14 145);
  --pf-warn:    oklch(0.72 0.15 70);
  --pf-danger:  oklch(0.62 0.18 25);
  /* type */
  --pf-sans: 'DM Sans', system-ui, sans-serif;
  --pf-mono: 'IBM Plex Mono', ui-monospace, monospace;
  --pf-display: 'Fraunces', 'DM Sans', serif;
  /* spacing */
  --pf-r-sm: 4px;
  --pf-r-md: 6px;
  --pf-r-lg: 10px;
  --pf-r-xl: 16px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--pf-bg-base);
  color: var(--pf-text-primary);
  font-family: var(--pf-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Scanlines on body */
body::before {
  content: '';
  position: fixed; inset: 0; pointer-events: none; z-index: 1;
  background: repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(255,255,255,0.012) 3px, rgba(255,255,255,0.012) 4px);
}
/* ambient glow */
body::after {
  content: '';
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, oklch(0.65 0.18 250 / 0.10), transparent 70%),
    radial-gradient(ellipse 40% 40% at 90% 30%, oklch(0.65 0.16 195 / 0.06), transparent 70%),
    radial-gradient(ellipse 50% 50% at 10% 60%, oklch(0.72 0.17 58 / 0.05), transparent 70%);
}

/* layout */
.container { max-width: 1240px; margin: 0 auto; padding: 0 32px; position: relative; z-index: 2; }
@media (max-width: 720px) { .container { padding: 0 20px; } }

/* ── NAV ─────────────────────────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  background: oklch(0.18 0.012 250 / 0.7);
  border-bottom: 1px solid var(--pf-border-subtle);
}
.nav-inner { display: flex; align-items: center; gap: 32px; height: 60px; min-width: 0; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; }
.logo-mark {
  width: 28px; height: 28px; border-radius: 6px;
  background: linear-gradient(135deg, var(--pf-forge), var(--pf-accent));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 1px 4px oklch(0.72 0.17 58 / 0.3), 0 0 16px oklch(0.65 0.18 250 / 0.25);
  flex-shrink: 0;
}
.logo-text { display: flex; flex-direction: column; line-height: 1; gap: 2px; }
.logo-name { font-family: var(--pf-sans); font-weight: 700; font-size: 15px; letter-spacing: -0.4px; }
.logo-alpha { font-family: var(--pf-mono); font-size: 9px; color: var(--pf-text-muted); letter-spacing: 0.12em; }
.nav-links { display: flex; gap: 28px; flex: 1; }
.nav-links a { color: var(--pf-text-secondary); text-decoration: none; font-size: 13px; font-weight: 500; transition: color 0.15s; }
.nav-links a:hover { color: var(--pf-text-primary); }
.nav-cta { display: flex; gap: 8px; align-items: center; margin-left: auto; }
@media (max-width: 720px) {
  .nav-inner { gap: 12px; }
  .nav-links { display: none; }
  .nav-cta .btn-ghost { display: none; }
  .nav-cta .btn-primary {
    padding-inline: 12px;
    white-space: nowrap;
  }
}

/* Forge signature line under nav */
.forge-line {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, oklch(0.72 0.15 65 / 0.55) 25%, oklch(0.65 0.18 250 / 0.45) 60%, transparent 100%);
  animation: forgeLine 4s ease-in-out infinite;
}
@keyframes forgeLine { 0%,100% { opacity: 0.6; } 50% { opacity: 1; } }
@keyframes forgePulse { 0%,100% { opacity: 0.5; } 50% { opacity: 1; } }
@keyframes pulseDot { 0%,100% { transform: scale(1); opacity: 0.9; } 50% { transform: scale(1.4); opacity: 1; } }
@keyframes shimmer { 0% { transform: translateX(-100%); } 100% { transform: translateX(200%); } }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px; border-radius: 6px; border: 1px solid transparent;
  font-family: var(--pf-sans); font-size: 13px; font-weight: 600;
  text-decoration: none; cursor: pointer; transition: all 0.18s;
  letter-spacing: 0.01em; line-height: 1;
}
.btn-primary {
  background: linear-gradient(180deg, oklch(0.45 0.16 250), oklch(0.38 0.14 250));
  color: white;
  box-shadow: 0 1px 0 oklch(0.55 0.18 250) inset, 0 4px 14px oklch(0.45 0.16 250 / 0.35), 0 0 0 1px oklch(0.55 0.18 250 / 0.4);
}
.btn-primary:hover { box-shadow: 0 1px 0 oklch(0.6 0.18 250) inset, 0 6px 22px oklch(0.5 0.16 250 / 0.5), 0 0 0 1px oklch(0.6 0.18 250 / 0.6); transform: translateY(-1px); }
.btn[aria-disabled="true"] { cursor: default; opacity: 0.72; }
.btn-secondary {
  background: var(--pf-bg-elevated); color: var(--pf-text-primary);
  border-color: var(--pf-border-default);
}
.btn-secondary:hover { background: var(--pf-bg-panel); border-color: var(--pf-text-muted); }
.btn-ghost { background: transparent; color: var(--pf-text-secondary); }
.btn-ghost:hover { color: var(--pf-text-primary); background: var(--pf-bg-elevated); }
.btn svg { flex-shrink: 0; }

/* download buttons */
.btn-download {
  align-items: center;
  gap: 10px;
  min-height: 50px;
  padding: 12px 18px;
}
.btn-download .dl-glyph {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}
.btn-download .dl-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.15;
  min-width: 0;
}
.btn-download .dl-label {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0;
  white-space: nowrap;
}
.btn-download .dl-meta {
  font-family: var(--pf-mono);
  font-size: 10px;
  font-weight: 400;
  color: var(--pf-text-muted);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.btn-primary.btn-download .dl-meta { color: oklch(0.92 0.04 250 / 0.7); }
.btn-download.coming-soon {
  pointer-events: none;
  background: transparent;
  color: var(--pf-text-muted);
  border: 1px dashed var(--pf-border-default);
  box-shadow: none;
  transform: none;
}
.btn-download.coming-soon .dl-meta { color: var(--pf-text-muted); }
.btn-download.coming-soon:hover {
  background: transparent;
  box-shadow: none;
  transform: none;
}
.alpha-disclaimer {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 6px 12px;
  background: oklch(0.72 0.15 70 / 0.08);
  border: 1px solid oklch(0.72 0.15 70 / 0.25);
  border-radius: 6px;
  color: oklch(0.82 0.10 70);
  font-size: 12px;
}
.alpha-disclaimer svg { flex-shrink: 0; }

/* eyebrow */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 11px; border-radius: 999px;
  background: oklch(0.65 0.16 195 / 0.10);
  border: 1px solid oklch(0.65 0.16 195 / 0.30);
  font-family: var(--pf-mono); font-size: 10px; font-weight: 500;
  color: var(--pf-ai); letter-spacing: 0.1em; text-transform: uppercase;
}
.eyebrow .dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--pf-ai);
  animation: pulseDot 2s ease-in-out infinite;
}

/* ── HERO ────────────────────────────────────────────────────────────────── */
.hero { padding: 92px 0 60px; position: relative; }
.hero-grid { display: grid; gap: 40px; align-items: center; }

.hero h1 {
  font-family: var(--pf-display);
  font-size: clamp(42px, 6vw, 76px);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 18px 0 22px;
  color: var(--pf-text-primary);
}
.hero h1 em {
  font-style: italic;
  font-weight: 300;
  background: linear-gradient(120deg, var(--pf-forge) 0%, var(--pf-accent) 50%, var(--pf-ai) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-title-mobile-break { display: none; }
.hero-sub {
  font-size: clamp(16px, 1.5vw, 19px);
  color: var(--pf-text-secondary);
  max-width: 580px;
  line-height: 1.55;
  margin: 0 0 30px;
  text-wrap: pretty;
}
.hero-ctas { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.hero-meta {
  display: flex; gap: 14px; margin-top: 22px;
  font-family: var(--pf-mono); font-size: 11px; color: var(--pf-text-muted);
  letter-spacing: 0.08em;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta .ok { color: var(--pf-success); }

/* App mockup — entire DAW UI rendered in HTML/CSS, frozen state */
.app-frame {
  margin-top: 56px;
  border-radius: 12px;
  background: var(--pf-bg-base);
  border: 1px solid var(--pf-border-default);
  overflow: hidden;
  box-shadow:
    0 50px 100px -30px rgba(0,0,0,0.6),
    0 30px 60px -20px oklch(0.65 0.18 250 / 0.18),
    0 0 0 1px oklch(0.65 0.18 250 / 0.08),
    0 0 80px oklch(0.65 0.16 195 / 0.06);
  position: relative;
  transform: perspective(2000px) rotateX(0deg);
}
.app-frame::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at top, oklch(0.65 0.18 250 / 0.08), transparent 60%);
  pointer-events: none;
}

/* mac chrome */
.app-chrome {
  height: 28px; background: var(--pf-bg-surface);
  border-bottom: 1px solid var(--pf-border-subtle);
  display: flex; align-items: center; padding: 0 12px; gap: 6px;
}
.app-chrome .dot { width: 11px; height: 11px; border-radius: 50%; }
.app-chrome .red { background: #ff5f57; }
.app-chrome .yellow { background: #febc2e; }
.app-chrome .green { background: #28c840; }
.app-chrome .title { margin-left: auto; margin-right: auto; transform: translateX(-25px); font-family: var(--pf-mono); font-size: 10px; color: var(--pf-text-muted); }

/* transport mini */
.app-transport {
  height: 52px; background: var(--pf-bg-surface);
  display: flex; align-items: center; padding: 0 14px; gap: 10px;
  border-bottom: 1px solid var(--pf-border-subtle);
}
.transport-btn {
  width: 28px; height: 28px; border-radius: 5px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
}
.transport-btn.active { background: var(--pf-accent-dim); box-shadow: 0 0 8px oklch(0.65 0.18 250 / 0.4); }
.transport-btn svg { width: 13px; height: 13px; }

.transport-center {
  flex: 1; display: flex; justify-content: center;
}
.transport-panel {
  display: flex; align-items: stretch;
  background: var(--pf-bg-base); border-radius: 7px;
  border: 1px solid var(--pf-border-default);
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.55);
  overflow: hidden;
}
.tp-section {
  padding: 5px 14px;
  border-right: 1px solid var(--pf-border-subtle);
  display: flex; flex-direction: column; align-items: center; gap: 2px;
}
.tp-section:last-child { border-right: none; }
.tp-time {
  font-family: var(--pf-mono); font-size: 22px; font-weight: 300;
  letter-spacing: 0.12em; line-height: 1;
  text-shadow: 0 0 16px oklch(0.65 0.18 250 / 0.55), 0 0 32px oklch(0.65 0.18 250 / 0.22);
}
.tp-bar { font-family: var(--pf-mono); font-size: 8px; color: var(--pf-text-muted); letter-spacing: 0.12em; }
.tp-bpm { font-family: var(--pf-mono); font-size: 20px; font-weight: 300; letter-spacing: 0.05em; }
.tp-label { font-family: var(--pf-mono); font-size: 8px; color: var(--pf-text-muted); letter-spacing: 0.12em; }
.tp-sig { font-family: var(--pf-mono); font-size: 14px; color: var(--pf-text-secondary); line-height: 1; }
.tp-sig-line { width: 14px; height: 1px; background: var(--pf-border-default); margin: 1px 0; }
.tp-vu { display: flex; gap: 2px; align-items: flex-end; height: 22px; }
.tp-vu span { width: 3px; border-radius: 1px; background: var(--pf-accent); display: block; }

.ai-btn-hero {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 5px;
  background: linear-gradient(135deg, oklch(0.28 0.12 195), oklch(0.22 0.10 220));
  color: var(--pf-ai); font-size: 12px; font-weight: 600;
  box-shadow: 0 0 0 1px oklch(0.65 0.16 195 / 0.35), 0 2px 12px oklch(0.65 0.16 195 / 0.25);
}

/* main grid in mockup: tracklist | arranger | ai dock */
.app-main {
  display: grid;
  grid-template-columns: 200px 1fr 240px;
  height: 460px;
}
.app-tracks {
  background: var(--pf-bg-surface);
  border-right: 1px solid var(--pf-border-subtle);
  overflow: hidden;
}
.track-row {
  height: 48px; display: flex; align-items: center; gap: 0;
  border-bottom: 1px solid var(--pf-border-subtle);
}
.track-row.selected { background: linear-gradient(90deg, oklch(0.6 0.18 250 / 0.08), transparent); }
.track-color { width: 3px; height: 100%; flex-shrink: 0; }
.track-info { padding: 0 10px; flex: 1; min-width: 0; }
.track-name { font-size: 11px; font-weight: 500; color: var(--pf-text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.track-inst { font-family: var(--pf-mono); font-size: 9px; color: var(--pf-text-muted); margin-top: 1px; }
.track-ms { display: flex; gap: 2px; padding: 0 8px; }
.track-ms span {
  width: 16px; height: 16px; border-radius: 3px;
  background: var(--pf-bg-elevated);
  font-family: var(--pf-mono); font-size: 9px; font-weight: 600;
  display: flex; align-items: center; justify-content: center;
  color: var(--pf-text-muted);
}

/* Arranger area (with piano roll snippet inside hero) */
.app-canvas { background: var(--pf-bg-base); position: relative; overflow: hidden; }

/* piano roll mini */
.proll {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--pf-border-subtle) 1px, transparent 1px),
    linear-gradient(to bottom, oklch(0.22 0.012 250) 1px, transparent 1px);
  background-size: 80px 14px, 100% 14px;
}
.proll-keys {
  position: absolute; left: 0; top: 0; bottom: 0; width: 38px;
  background: var(--pf-bg-elevated); border-right: 1px solid var(--pf-border-default);
  display: flex; flex-direction: column;
}
.proll-key { height: 14px; border-bottom: 1px solid var(--pf-border-subtle); }
.proll-key.black { background: var(--pf-bg-panel); }
.proll-ruler {
  position: absolute; left: 38px; right: 0; top: 0; height: 22px;
  background: var(--pf-bg-surface);
  border-bottom: 1px solid var(--pf-border-default);
  display: flex; align-items: center;
}
.proll-bar {
  flex: 1; padding: 0 8px;
  font-family: var(--pf-mono); font-size: 9px; color: var(--pf-text-muted); letter-spacing: 0.08em;
  border-right: 1px solid var(--pf-border-subtle);
}
.proll-notes { position: absolute; left: 38px; right: 0; top: 22px; bottom: 0; }
.note {
  position: absolute; height: 12px; border-radius: 3px;
  background: linear-gradient(to bottom, oklch(0.78 0.12 248 / 0.85), oklch(0.55 0.16 250 / 0.85));
  border: 1px solid oklch(0.7 0.10 248 / 0.5);
  box-shadow: inset 0 1px 0 oklch(1 0 0 / 0.18);
}
.note.ai {
  background: linear-gradient(to bottom, oklch(0.75 0.14 190 / 0.8), oklch(0.55 0.16 198 / 0.8));
  border-color: oklch(0.65 0.16 195 / 0.7);
  box-shadow: 0 0 6px oklch(0.65 0.16 195 / 0.45), inset 0 1px 0 oklch(1 0 0 / 0.15);
  animation: noteAppear 0.4s ease-out backwards;
}
@keyframes noteAppear { from { opacity: 0; transform: scaleX(0.5); } to { opacity: 1; transform: scaleX(1); } }

.playhead {
  position: absolute; top: 0; bottom: 0; width: 2px;
  background: var(--pf-accent);
  box-shadow: 0 0 8px oklch(0.65 0.18 250 / 0.7);
}
.playhead::before {
  content: ''; position: absolute; top: 0; left: -3px;
  width: 8px; height: 8px; background: var(--pf-accent); border-radius: 0 0 3px 3px;
}

/* AI dock mini */
.app-ai {
  background: var(--pf-bg-surface);
  border-left: 1px solid var(--pf-border-subtle);
  box-shadow: -1px 0 0 oklch(0.65 0.16 195 / 0.15), -4px 0 20px oklch(0.65 0.16 195 / 0.06);
  display: flex; flex-direction: column;
}
.ai-header {
  height: 40px; padding: 0 12px; display: flex; align-items: center; gap: 8px;
  border-bottom: 1px solid var(--pf-border-subtle);
}
.ai-icon {
  width: 22px; height: 22px; border-radius: 5px;
  background: var(--pf-ai-dim);
  display: flex; align-items: center; justify-content: center;
}
.ai-section { padding: 10px 12px; border-bottom: 1px solid var(--pf-border-subtle); }
.ai-label { font-size: 9px; font-weight: 600; color: var(--pf-text-muted); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 6px; }
.ai-chips { display: flex; flex-wrap: wrap; gap: 4px; }
.ai-chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 7px; border-radius: 4px;
  font-family: var(--pf-mono); font-size: 9px;
  background: oklch(0.65 0.16 195 / 0.10);
  border: 1px solid oklch(0.65 0.16 195 / 0.33);
  color: var(--pf-ai);
}
.ai-chip.accent { background: oklch(0.65 0.18 250 / 0.10); border-color: oklch(0.65 0.18 250 / 0.33); color: var(--pf-accent); }
.ai-prompt {
  background: var(--pf-bg-elevated); border-radius: 5px; border: 1px solid var(--pf-border-subtle);
  padding: 8px 10px;
  font-size: 11px; color: var(--pf-text-primary); line-height: 1.45;
  min-height: 60px;
}
.ai-prompt em { font-style: normal; color: var(--pf-text-muted); }
.ai-cursor {
  display: inline-block; width: 6px; height: 12px;
  background: var(--pf-ai); margin-left: 1px; vertical-align: middle;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.ai-suggestions { display: flex; flex-direction: column; gap: 4px; }
.ai-sug {
  font-size: 10px; padding: 5px 8px; border-radius: 4px;
  background: var(--pf-bg-elevated); color: var(--pf-text-secondary);
  border: 1px solid var(--pf-border-subtle);
}

/* arranger area inside hero shows clips */
.arranger {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--pf-border-subtle) 1px, transparent 1px);
  background-size: 80px 100%;
}
.clip {
  position: absolute; height: 38px; border-radius: 4px;
  border: 1px solid;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
  overflow: hidden;
}
.clip-wave {
  display: flex; align-items: center; gap: 1px;
  height: 100%; padding: 0 4px; opacity: 0.55;
}
.clip-wave span {
  width: 2px; border-radius: 1px;
}

/* ── SECTION COMMON ──────────────────────────────────────────────────────── */
.section { padding: 120px 0; position: relative; }
.section-eyebrow {
  font-family: var(--pf-mono); font-size: 11px; color: var(--pf-text-muted);
  letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: 18px;
  display: flex; align-items: center; gap: 12px;
}
.section-eyebrow::before {
  content: ''; width: 24px; height: 1px; background: var(--pf-accent);
}
.section-heading {
  font-family: var(--pf-display);
  font-size: clamp(34px, 4.5vw, 56px); font-weight: 300;
  line-height: 1.06; letter-spacing: -0.02em;
  margin: 0 0 22px;
  max-width: 820px;
  text-wrap: balance;
}
.section-heading em { font-style: italic; color: var(--pf-text-secondary); }
.section-sub {
  font-size: clamp(15px, 1.4vw, 18px); color: var(--pf-text-secondary);
  max-width: 640px; margin: 0; line-height: 1.55;
  text-wrap: pretty;
}

/* ── AI section ──────────────────────────────────────────────────────────── */
.ai-flow-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center; margin-top: 56px; }
@media (max-width: 920px) { .ai-flow-grid { grid-template-columns: 1fr; } }

.ai-demo {
  background: var(--pf-bg-surface);
  border: 1px solid var(--pf-border-default);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 30px 60px -25px rgba(0,0,0,0.5), 0 0 0 1px oklch(0.65 0.16 195 / 0.12);
  position: relative;
}
.ai-demo-header {
  padding: 12px 16px; border-bottom: 1px solid var(--pf-border-subtle);
  display: flex; align-items: center; gap: 10px;
  background: linear-gradient(180deg, oklch(0.245 0.012 250), oklch(0.215 0.012 250));
}
.ai-demo-prompt {
  padding: 18px 20px; font-family: var(--pf-sans); font-size: 14px;
  color: var(--pf-text-primary); line-height: 1.5;
  border-bottom: 1px solid var(--pf-border-subtle);
}
.ai-demo-prompt em { color: var(--pf-text-muted); font-style: normal; }
.ai-demo-roll {
  position: relative; height: 220px;
  background: var(--pf-bg-base);
  background-image: linear-gradient(to bottom, oklch(0.22 0.012 250) 1px, transparent 1px);
  background-size: 100% 18px;
  overflow: hidden;
}
.ai-demo-roll::before {
  content: ''; position: absolute; inset: 0;
  background: repeating-linear-gradient(90deg, var(--pf-border-subtle) 0 1px, transparent 1px 80px);
}
.ai-demo-shimmer {
  position: absolute; left: 0; top: 0; bottom: 0; width: 60%;
  background: linear-gradient(90deg, transparent, oklch(0.65 0.16 195 / 0.10), transparent);
  animation: shimmer 2.6s ease-in-out infinite;
  pointer-events: none;
}
.ai-demo-badge {
  position: absolute; top: 12px; left: 12px; z-index: 4;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 5px;
  background: oklch(0.65 0.16 195 / 0.15);
  border: 1px solid oklch(0.65 0.16 195 / 0.4);
  font-size: 11px; color: var(--pf-ai); font-weight: 500;
}
.ai-demo-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--pf-ai); animation: forgePulse 0.8s ease-in-out infinite; }
.ai-demo-roll .note { animation: noteAppear 0.4s ease-out both; }
.ai-demo-actions {
  display: flex; align-items: center; gap: 10px; padding: 12px 16px;
  background: var(--pf-bg-surface); border-top: 1px solid oklch(0.65 0.16 195 / 0.3);
}
.ai-demo-actions .ready {
  display: flex; align-items: center; gap: 8px;
  flex: 1; font-size: 12px; color: var(--pf-ai); font-weight: 500;
}
.ai-demo-actions .ready .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--pf-ai); animation: pulseDot 1.5s ease-in-out infinite; }
.btn-accept {
  background: oklch(0.65 0.16 195 / 0.2); color: var(--pf-ai);
  border: none; padding: 6px 14px; border-radius: 5px;
  font-family: var(--pf-sans); font-size: 12px; font-weight: 600; cursor: pointer;
}
.btn-discard {
  background: transparent; color: var(--pf-text-muted);
  border: none; padding: 6px 10px; border-radius: 5px; cursor: pointer;
  font-family: var(--pf-sans); font-size: 12px;
}

.ai-points { display: flex; flex-direction: column; gap: 28px; }
.ai-point { display: flex; gap: 16px; align-items: flex-start; }
.ai-point-num {
  flex-shrink: 0; width: 32px; height: 32px; border-radius: 50%;
  background: oklch(0.65 0.16 195 / 0.10);
  border: 1px solid oklch(0.65 0.16 195 / 0.3);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--pf-mono); font-size: 12px; color: var(--pf-ai); font-weight: 500;
}
.ai-point h3 { font-family: var(--pf-sans); font-size: 17px; font-weight: 600; margin: 4px 0 6px; letter-spacing: -0.01em; }
.ai-point p { color: var(--pf-text-secondary); font-size: 14px; margin: 0; line-height: 1.55; }

/* ── Piano roll feature section ──────────────────────────────────────────── */
.piano-feature { padding-top: 60px; }
.piano-mock {
  margin-top: 56px;
  background: var(--pf-bg-base);
  border: 1px solid var(--pf-border-default);
  border-radius: 14px;
  overflow: hidden;
  height: 460px;
  position: relative;
  box-shadow: 0 30px 60px -25px rgba(0,0,0,0.55), 0 0 0 1px rgba(255,255,255,0.02);
}
.piano-mock-grid {
  display: grid; grid-template-columns: 60px 1fr; height: 100%;
}
.piano-keys {
  background: var(--pf-bg-elevated);
  border-right: 1px solid var(--pf-border-default);
  display: flex; flex-direction: column;
}
.piano-key {
  height: 17px; border-bottom: 1px solid var(--pf-border-subtle);
  display: flex; align-items: center; padding: 0 8px;
  font-family: var(--pf-mono); font-size: 8px; color: var(--pf-text-muted);
}
.piano-key.black { background: var(--pf-bg-panel); }
.piano-grid-area {
  position: relative;
  background-image:
    linear-gradient(to right, var(--pf-border-subtle) 1px, transparent 1px),
    linear-gradient(to bottom, oklch(0.22 0.012 250) 1px, transparent 1px);
  background-size: 80px 17px, 100% 17px;
}
.piano-grid-area .note { height: 15px; }

.piano-callouts {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 36px;
}
.callout {
  padding: 22px;
  border: 1px solid var(--pf-border-subtle);
  border-radius: var(--pf-r-lg);
  background: var(--pf-bg-surface);
  position: relative; overflow: hidden;
}
.callout::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--pf-accent), transparent);
  opacity: 0.4;
}
.callout-icon {
  width: 30px; height: 30px; border-radius: 7px;
  background: oklch(0.65 0.18 250 / 0.12);
  border: 1px solid oklch(0.65 0.18 250 / 0.3);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.callout h4 { margin: 0 0 6px; font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.callout p { margin: 0; color: var(--pf-text-secondary); font-size: 13px; line-height: 1.5; }
@media (max-width: 720px) { .piano-callouts { grid-template-columns: 1fr; } }

/* ── Instrument browser section ──────────────────────────────────────────── */
.instr-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; align-items: center; margin-top: 56px; }
@media (max-width: 920px) { .instr-grid { grid-template-columns: 1fr; } }

.instr-card-mock {
  background: var(--pf-bg-surface);
  border: 1px solid var(--pf-border-default);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 30px 60px -25px rgba(0,0,0,0.5);
}
.instr-search {
  padding: 16px 20px; border-bottom: 1px solid var(--pf-border-subtle);
}
.instr-input-mock {
  background: var(--pf-bg-elevated); border: 1px solid var(--pf-border-subtle);
  border-radius: 5px; padding: 8px 12px; font-size: 13px;
  color: var(--pf-text-muted); display: flex; align-items: center; gap: 8px;
}
.instr-tabs { display: flex; gap: 4px; margin-top: 12px; }
.instr-tab {
  padding: 4px 10px; border-radius: 4px; font-size: 11px;
  background: transparent; color: var(--pf-text-muted);
  font-family: var(--pf-sans);
}
.instr-tab.active { background: var(--pf-accent-dim); color: var(--pf-accent); font-weight: 600; }

.instr-featured { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 14px 20px; border-bottom: 1px solid var(--pf-border-subtle); }
.instr-feat {
  padding: 12px; border-radius: 7px;
  border: 1px solid;
  position: relative; overflow: hidden;
}
.instr-feat-name { font-size: 12px; font-weight: 600; margin-top: 8px; }
.instr-feat-cat { font-family: var(--pf-mono); font-size: 9px; color: var(--pf-text-muted); margin-top: 2px; }

.instr-list { padding: 6px 0 14px; }
.instr-list-label { padding: 8px 20px 4px; font-size: 9px; font-weight: 600; color: var(--pf-text-muted); letter-spacing: 0.1em; text-transform: uppercase; }
.instr-row {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 20px; border-bottom: 1px solid var(--pf-border-subtle);
  position: relative;
}
.instr-row.hover { background: var(--pf-bg-elevated); }
.instr-row-icon {
  width: 30px; height: 30px; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.instr-row-info { flex: 1; min-width: 0; }
.instr-row-name { font-size: 12px; font-weight: 500; }
.instr-row-desc { font-size: 10px; color: var(--pf-text-muted); margin-top: 1px; }

.instr-points { display: flex; flex-direction: column; gap: 24px; }
.instr-points h3 { font-size: 18px; font-weight: 600; margin: 0 0 6px; letter-spacing: -0.01em; }
.instr-points p { color: var(--pf-text-secondary); font-size: 14px; margin: 0; }
.instr-points .item { padding-left: 18px; border-left: 2px solid var(--pf-border-subtle); }
.instr-points .item:hover { border-color: var(--pf-accent); }

/* ── Export / Trust split ───────────────────────────────────────────────── */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 920px) { .split { grid-template-columns: 1fr; } }
.split .card {
  padding: 36px;
  background: var(--pf-bg-surface);
  border: 1px solid var(--pf-border-default);
  border-radius: 14px;
  position: relative; overflow: hidden;
}
.split .card .num {
  font-family: var(--pf-display); font-style: italic; font-size: 36px; font-weight: 300;
  background: linear-gradient(135deg, var(--pf-forge), var(--pf-accent));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 14px; line-height: 1;
}
.split .card h3 { font-size: 22px; font-weight: 600; margin: 0 0 10px; letter-spacing: -0.01em; }
.split .card p { color: var(--pf-text-secondary); font-size: 14px; margin: 0 0 20px; line-height: 1.55; }

.formats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.format {
  padding: 10px 14px; border: 1px solid var(--pf-border-subtle);
  border-radius: 6px; background: var(--pf-bg-base);
  display: flex; align-items: center; justify-content: space-between;
}
.format .name { font-family: var(--pf-mono); font-size: 11px; font-weight: 500; color: var(--pf-text-primary); letter-spacing: 0.08em; }
.format .desc { font-size: 11px; color: var(--pf-text-muted); }

.update-list { display: flex; flex-direction: column; gap: 10px; }
.update-list li {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--pf-text-secondary); padding: 4px 0;
  list-style: none;
}
.update-list svg { flex-shrink: 0; color: var(--pf-success); }

/* ── Changelog ───────────────────────────────────────────────────────────── */
.releases-grid { display: grid; gap: 14px; margin-top: 40px; }
.release-card {
  background: var(--pf-bg-surface);
  border: 1px solid var(--pf-border-default);
  border-radius: 10px;
  padding: 24px 28px;
  display: grid; grid-template-columns: 180px 1fr; gap: 28px;
  position: relative; transition: border-color 0.2s;
}
.release-card:hover { border-color: oklch(0.65 0.18 250 / 0.4); }
@media (max-width: 720px) { .release-card { grid-template-columns: 1fr; gap: 16px; } }
.release-meta { display: flex; flex-direction: column; gap: 4px; }
.release-version {
  font-family: var(--pf-mono); font-size: 18px; font-weight: 500;
  color: var(--pf-text-primary); letter-spacing: 0.05em;
}
.release-date { font-family: var(--pf-mono); font-size: 11px; color: var(--pf-text-muted); }
.release-tag {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 8px; border-radius: 999px; align-self: flex-start;
  font-family: var(--pf-mono); font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; font-weight: 500;
  margin-top: 6px;
}
.tag-current { background: oklch(0.65 0.16 195 / 0.15); border: 1px solid oklch(0.65 0.16 195 / 0.4); color: var(--pf-ai); }
.tag-past { background: var(--pf-bg-elevated); border: 1px solid var(--pf-border-subtle); color: var(--pf-text-muted); }
.tag-tag { display: inline-block; }
.release-body h4 { font-size: 17px; font-weight: 600; margin: 0 0 10px; letter-spacing: -0.01em; }
.release-body h5 { font-size: 12px; font-weight: 700; color: var(--pf-text); margin: 12px 0 6px; text-transform: uppercase; letter-spacing: 0.08em; }
.release-body h5:first-of-type { margin-top: 0; }
.release-body ul { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 6px; }
.release-body li { font-size: 13px; color: var(--pf-text-secondary); padding-left: 14px; position: relative; line-height: 1.5; }
.release-body li::before {
  content: ''; position: absolute; left: 0; top: 9px;
  width: 5px; height: 5px; border-radius: 1px;
  background: var(--pf-accent); opacity: 0.7;
}
.release-body li.fix::before { background: var(--pf-warn); }
.release-body li.add::before { background: var(--pf-ai); }

/* ── Newsletter ──────────────────────────────────────────────────────────── */
.newsletter {
  margin-top: 60px;
  text-align: center;
  padding: 80px 40px;
  background: linear-gradient(180deg, var(--pf-bg-surface), var(--pf-bg-base));
  border: 1px solid var(--pf-border-default);
  border-radius: 16px;
  position: relative; overflow: hidden;
}
.newsletter::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 50% 80% at 50% 0%, oklch(0.65 0.18 250 / 0.10), transparent 70%),
    radial-gradient(ellipse 30% 60% at 50% 100%, oklch(0.72 0.17 58 / 0.06), transparent 70%);
  pointer-events: none;
}
.newsletter > * { position: relative; z-index: 1; }
.newsletter .eyebrow { margin-bottom: 16px; }
.newsletter h2 {
  font-family: var(--pf-display); font-size: clamp(28px, 3.5vw, 42px); font-weight: 300;
  letter-spacing: -0.02em; margin: 0 0 12px; line-height: 1.1;
}
.newsletter p { color: var(--pf-text-secondary); font-size: 15px; margin: 0 0 28px; max-width: 560px; margin-inline: auto; }
.newsletter-form { max-width: 500px; margin: 0 auto; }
.newsletter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
}
.newsletter-field {
  flex: 1; min-width: 240px;
  display: block;
}
.newsletter-input {
  width: 100%;
  background: var(--pf-bg-base); border: 1px solid var(--pf-border-default);
  border-radius: 6px; padding: 11px 14px;
  font-family: var(--pf-sans); font-size: 14px; color: var(--pf-text-primary);
  outline: none; transition: border-color 0.15s, box-shadow 0.15s;
}
.newsletter-input::placeholder { color: var(--pf-text-muted); }
.newsletter-input:focus {
  border-color: var(--pf-accent);
  box-shadow: 0 0 0 3px oklch(0.65 0.18 250 / 0.18);
}
.newsletter-submit {
  min-height: 42px;
  padding: 0 18px;
  white-space: nowrap;
}
.newsletter-status {
  min-height: 18px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--pf-success);
}
.newsletter-privacy {
  margin-top: 18px; font-family: var(--pf-mono); font-size: 11px; color: var(--pf-text-muted);
  letter-spacing: 0.08em;
  max-width: 520px;
  margin-inline: auto;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--pf-border-subtle);
  padding: 60px 0 40px;
  margin-top: 80px;
  position: relative;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 40px;
}
@media (max-width: 720px) { .footer-inner { grid-template-columns: 1fr 1fr; } }
.footer-brand p { color: var(--pf-text-muted); font-size: 13px; margin: 16px 0 0; max-width: 260px; line-height: 1.55; }
.footer-col h5 { font-family: var(--pf-sans); font-size: 11px; font-weight: 600; color: var(--pf-text-muted); letter-spacing: 0.1em; text-transform: uppercase; margin: 0 0 14px; }
.footer-col ul { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: var(--pf-text-secondary); text-decoration: none; font-size: 13px; transition: color 0.15s; }
.footer-col a:hover { color: var(--pf-text-primary); }
.footer-bottom {
  margin-top: 50px; padding-top: 24px;
  border-top: 1px solid var(--pf-border-subtle);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--pf-mono); font-size: 11px; color: var(--pf-text-muted);
  letter-spacing: 0.08em;
  flex-wrap: wrap; gap: 12px;
}

/* ── responsive hero refinements ─────────────────────────────────────────── */
@media (max-width: 720px) {
  .hero { padding: 60px 0 40px; }
  .hero h1 {
    font-size: clamp(40px, 13vw, 58px);
    letter-spacing: 0;
  }
  .hero-title-mobile-break { display: block; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .btn-download { width: 100%; justify-content: center; }
  .newsletter { padding: 48px 20px; }
  .newsletter-row { flex-direction: column; }
  .newsletter-field { min-width: 0; width: 100%; }
  .newsletter-submit { justify-content: center; width: 100%; }
  .section { padding: 80px 0; }
  .app-main { grid-template-columns: 60px 1fr; height: 360px; }
  .app-ai { display: none; }
  .release-meta { flex-direction: row; align-items: center; gap: 10px; }
}

/* utility */
.row { display: flex; align-items: center; gap: 8px; }
.spacer { flex: 1; }