:root {
  --ink: #1a1510;
  --muted: #6a5a48;
  --paper: #f7f1e8;
  --paper-2: #ebe1d2;
  --panel: rgba(255, 250, 242, 0.78);
  --accent: #e8922e;
  --accent-2: #c46a12;
  --marigold: #f0b068;
  --line: rgba(26, 21, 16, 0.12);
  --shadow: 0 18px 50px rgba(26, 21, 16, 0.08);
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
  --display: "Fraunces", Georgia, serif;
  --max: 1080px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  background:
    radial-gradient(1200px 600px at 8% -8%, rgba(240, 176, 104, 0.28), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(232, 146, 46, 0.12), transparent 50%),
    linear-gradient(180deg, #fff8ef 0%, var(--paper) 42%, #efe4d4 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 27px,
      rgba(28, 36, 32, 0.03) 28px
    );
  opacity: 0.55;
  z-index: -1;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-2);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem clamp(1rem, 4vw, 2rem);
  backdrop-filter: blur(10px);
  background: rgba(255, 248, 239, 0.86);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: inherit;
  text-decoration: none;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
}

.brand-mark {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--ink);
  border-radius: 1px;
  transition: transform 160ms ease, opacity 160ms ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.1rem;
  font-size: 0.95rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
}

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

.nav a.is-active {
  color: var(--ink);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 0.28em;
}

.blog-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.blog-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.blog-list a {
  color: var(--ink);
  text-decoration: none;
  font-family: var(--display);
  font-size: 1.25rem;
}

.blog-list a:hover {
  color: var(--amber, #c46a12);
}

.blog-meta {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.post h1 {
  font-family: var(--display);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin: 0.35rem 0 1rem;
}

.post p {
  max-width: 65ch;
  line-height: 1.55;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 3.5rem) clamp(1rem, 4vw, 2rem) 2.5rem;
}

.hero-brand {
  margin-bottom: 1rem;
}

.hero-logo {
  width: 72px;
  height: 72px;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 8px 20px rgba(26, 21, 16, 0.12));
}

.paper-title {
  margin: 0 0 0.85rem;
  font-family: var(--display);
  font-size: clamp(1.85rem, 4.2vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 28ch;
}

.authors {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--ink);
}

.affiliation {
  margin: 0.25rem 0 1.25rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.5rem;
}

.stat-strip {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0 0 1.75rem;
  padding: 0;
  width: 100%;
  max-width: 40rem;
}

.stat-strip li {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.7rem 0.75rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.stat-strip strong {
  font-family: var(--display);
  font-size: 1.35rem;
}

.stat-strip span {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-abstract {
  margin: 0 0 1.5rem;
  max-width: 42rem;
  font-size: 1.02rem;
  line-height: 1.55;
  color: var(--ink);
}

.hero-abstract strong {
  font-weight: 600;
}

.hero-panel {
  width: 100%;
  max-width: 28rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.35rem 1.4rem;
  box-shadow: var(--shadow);
  font-family: var(--mono);
  font-size: 0.9rem;
}

.hero-panel code {
  display: block;
  margin-bottom: 0.8rem;
  color: var(--accent-2);
  font-size: 0.95rem;
}

.hero-panel ul {
  margin: 0 0 1rem;
  padding-left: 1.1rem;
}

.hero-panel p {
  margin: 0;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.88rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  background: transparent;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.55);
}

.btn.primary {
  background: var(--ink);
  color: var(--paper);
}

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

.btn.ghost {
  border-color: transparent;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3.5rem clamp(1rem, 4vw, 2rem);
}

.section.alt {
  background: rgba(255, 252, 246, 0.45);
  border-block: 1px solid var(--line);
  max-width: none;
  padding-inline: max(1rem, calc((100vw - var(--max)) / 2));
}

.section-head {
  max-width: 40rem;
  margin-bottom: 1.75rem;
}

.section-head h2 {
  margin: 0 0 0.55rem;
  font-family: var(--display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.figure-block {
  margin: 0 0 2rem;
  padding: 1rem;
  background: rgba(255, 252, 246, 0.55);
  border: 1px solid var(--line);
  border-radius: 16px;
}

.figure-block img {
  display: block;
  width: 100%;
  height: auto;
}

.figure-block figcaption {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2rem;
  margin-bottom: 1.75rem;
}

.two-col h3 {
  margin: 0 0 0.6rem;
  font-family: var(--display);
  font-size: 1.2rem;
}

.steps,
.plain {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.steps li,
.plain li {
  margin-bottom: 0.45rem;
}

.steps code,
.plain code,
.license code,
figcaption code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: rgba(28, 36, 32, 0.06);
  padding: 0.05em 0.3em;
  border-radius: 4px;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem;
}

.chart-card {
  background: rgba(255, 252, 246, 0.7);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1rem 1.1rem 1.2rem;
}

.chart-card-wide {
  grid-column: 1 / -1;
}

.chart-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

.chart-note {
  margin: 0.65rem 0 0;
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--muted);
}

.demo-root {
  display: grid;
  gap: 1.1rem;
}

.demo-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 252, 246, 0.75);
  padding: 1.1rem 1.2rem 1.25rem;
}

.demo-card header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 0.85rem;
}

.demo-card h3 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.25rem;
}

.demo-card .blurb {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.demo-meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.mixer-transport {
  display: grid;
  grid-template-columns: auto auto auto 1fr;
  align-items: center;
  gap: 0.5rem 0.65rem;
  margin: 0 0 0.85rem;
}

.mixer-btn {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
}

.mixer-btn.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  padding: 0;
  border-radius: 999px;
}

.mixer-btn.icon-btn svg {
  width: 1.05rem;
  height: 1.05rem;
  fill: currentColor;
  display: block;
}

.mixer-btn.icon-btn .icon-pause {
  display: none;
}

.mixer-btn.icon-btn.is-playing .icon-play {
  display: none;
}

.mixer-btn.icon-btn.is-playing .icon-pause {
  display: block;
}

.mixer-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.mixer-btn.primary.is-playing {
  background: var(--ink);
  border-color: var(--ink);
}

.mixer-time {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
  white-space: nowrap;
}

.mixer-seek {
  width: 100%;
  min-width: 8rem;
  height: 0.35rem;
  accent-color: var(--accent);
  cursor: pointer;
}

.stem-list {
  display: grid;
  gap: 0.45rem;
}

.stem-row {
  display: grid;
  grid-template-columns: minmax(var(--stem-label-ch, 12ch), max-content) auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.5rem 0.65rem;
  border-radius: 10px;
  background: rgba(28, 36, 32, 0.03);
}

.stem-label {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  white-space: pre;
  min-width: calc(var(--stem-label-ch, 12) * 1ch);
}

.stem-actions {
  display: flex;
  gap: 0.35rem;
}

.stem-row button[data-action] {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 0.25rem 0.65rem;
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
  min-width: 3.6rem;
}

.stem-row button[data-action].active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.stem-row audio {
  display: none;
}

@media (max-width: 640px) {
  .mixer-transport {
    grid-template-columns: auto auto 1fr;
  }

  .mixer-seek {
    grid-column: 1 / -1;
  }
}

.soundfonts-root {
  display: grid;
  gap: 1rem;
}

.soundfont-basic {
  margin: 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 252, 246, 0.65);
  font-size: 0.92rem;
  line-height: 1.45;
}

.soundfont-basic code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: rgba(28, 36, 32, 0.06);
  padding: 0.05em 0.3em;
  border-radius: 4px;
}

.soundfont-panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 252, 246, 0.55);
  padding: 0.15rem 0;
}

.soundfont-panel summary {
  cursor: pointer;
  list-style: none;
  padding: 0.85rem 1rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink);
}

.soundfont-panel summary::-webkit-details-marker {
  display: none;
}

.soundfont-panel summary::before {
  content: "";
  display: inline-block;
  width: 0.45rem;
  height: 0.45rem;
  margin-right: 0.55rem;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(-45deg);
  vertical-align: 0.15rem;
  transition: transform 0.15s ease;
}

.soundfont-panel[open] summary::before {
  transform: rotate(45deg);
  vertical-align: 0.05rem;
}

.soundfont-panel-body {
  padding: 0 1rem 1rem;
}

.soundfont-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: 0.35rem 1rem;
}

.soundfont-grid li {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink);
  line-height: 1.35;
  padding: 0.2rem 0;
  border-bottom: 1px solid rgba(26, 21, 16, 0.06);
}

.soundfont-footnote {
  margin: 0.75rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.soundfont-footnote a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.soundfont-footnote code {
  font-family: var(--mono);
  font-size: 0.86em;
}

.cite-label {
  margin: 1.25rem 0 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.cite-label:first-of-type {
  margin-top: 0;
}

.bib {
  overflow-x: auto;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  background: rgba(28, 36, 32, 0.92);
  color: #f3efe6;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.45;
}

.license {
  color: var(--muted);
  max-width: 42rem;
}

.site-footer {
  padding: 2rem clamp(1rem, 4vw, 2rem) 3rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 860px) {
  .two-col,
  .chart-grid {
    grid-template-columns: 1fr;
  }

  .stat-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .paper-title {
    max-width: none;
  }

  .site-header {
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0;
    padding: 0.35rem 0 0.5rem;
    border-top: 1px solid var(--line);
  }

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

  .nav a {
    padding: 0.7rem 0.15rem;
    border-bottom: 1px solid var(--line);
  }

  .nav a:last-child {
    border-bottom: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn {
    transition: none;
  }
}