/* Soundscape Agent — project page (GitHub Pages) */
:root {
  --bg: #0e1114;
  --bg-elevated: #151a20;
  --text: #e6e8eb;
  --text-muted: #8b95a1;
  --accent: #c4a574;
  --accent-dim: #8a7354;
  --border: #2a323c;
  --link: #7eb8da;
  --link-hover: #a8d4f0;
  --row-alt: #12161c;
  --radius: 10px;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --max-width: 820px;
  --side-pad: 1.25rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.02rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* subtle grain */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  z-index: 0;
}

a {
  color: var(--link);
  text-decoration: none;
  text-underline-offset: 3px;
}
a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

.wrap {
  max-width: calc(var(--max-width) + 2 * var(--side-pad));
  margin: 0 auto;
  padding: 0 var(--side-pad);
  position: relative;
  z-index: 1;
}

/* top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: calc(1100px + 2 * var(--side-pad));
  margin: 0 auto;
  padding: 0.65rem var(--side-pad);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
}
.topbar a {
  color: var(--text-muted);
  font-size: 0.88rem;
  text-decoration: none;
}
.topbar a:hover {
  color: var(--accent);
}
.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  justify-content: flex-end;
}
.topbar nav a::before {
  content: "·";
  margin-right: 0.5rem;
  color: var(--border);
  pointer-events: none;
}
.topbar nav a:first-child::before {
  content: "";
  margin: 0;
}

/* hero */
header.hero {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
  background: radial-gradient(
    ellipse 120% 80% at 50% -20%,
    #1a2229 0%,
    var(--bg) 55%
  );
}

.kicker {
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 0.6rem;
}

h1 {
  font-family: var(--font-display);
  font-weight: 550;
  font-size: clamp(1.9rem, 4.2vw, 2.5rem);
  line-height: 1.2;
  margin: 0 0 0.5rem;
  color: #f0f1f3;
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 40em;
  margin: 0 0 1.25rem;
}

.authors {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}
.affil {
  font-size: 0.88rem;
  color: var(--text-muted);
  opacity: 0.9;
  margin: 0 0 1.2rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin: 0.2rem 0 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
}
.btn:hover {
  border-color: var(--accent-dim);
  background: #1a1f25;
  color: var(--text);
  text-decoration: none;
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1410;
}
.btn.primary:hover {
  background: #d4b88a;
  border-color: #d4b88a;
  color: #1a1410;
}

/* sections */
section {
  padding: 2.75rem 0;
  border-bottom: 1px solid var(--border);
}
section:last-of-type {
  border-bottom: none;
}

h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 550;
  margin: 0 0 1rem;
  color: #f2f2f0;
  letter-spacing: -0.02em;
}
h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 1.6rem 0 0.65rem;
  color: #dcdfe4;
}
p.lead {
  color: var(--text-muted);
  font-size: 0.98rem;
  max-width: 50em;
}

ul.tight {
  margin: 0.4rem 0 0;
  padding-left: 1.2rem;
  color: var(--text-muted);
  font-size: 0.96rem;
}
ul.tight li {
  margin: 0.3rem 0;
}

/* pipeline box */
.callout {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  border-left: 3px solid var(--accent);
}

.prompt-box,
.listen-for {
  margin: 0.45rem 0 0.55rem;
  padding: 0.5rem 0.65rem;
  border-radius: 6px;
  font-size: 0.9rem;
  line-height: 1.45;
}

.prompt-box {
  border: 1px solid color-mix(in srgb, var(--link) 40%, var(--border));
  background: color-mix(in srgb, var(--link) 10%, transparent);
  color: var(--text);
}

.listen-for {
  border: 1px solid color-mix(in srgb, #89c88a 40%, var(--border));
  background: color-mix(in srgb, #89c88a 10%, transparent);
  color: var(--text);
}

/* compare rows */
.compare-block {
  margin: 1.2rem 0 0;
}
.compare-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1.25rem;
  padding: 1rem 0;
  border-top: 1px solid var(--border);
  align-items: start;
}
.compare-row:nth-child(odd) {
  background: linear-gradient(90deg, var(--row-alt) 0%, transparent 100%);
  margin: 0 -0.5rem;
  padding-left: 0.5rem;
  padding-right: 0.5rem;
  border-radius: 6px;
  border-top: none;
  padding-top: 1rem;
  padding-bottom: 0.5rem;
}
.col-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-dim);
  margin: 0 0 0.2rem;
}
.caption {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 0.5rem;
  line-height: 1.45;
}

/* audio */
audio {
  width: 100%;
  max-width: 100%;
  height: 36px;
  border-radius: 4px;
}

audio.audio-fallback {
  display: none;
}

.audio-player {
  margin: 0.15rem 0 0.85rem;
}

.audio-player.is-loading .waveform-host {
  opacity: 0.7;
}

.audio-player.is-playing .waveform-host {
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 1px rgba(196, 165, 116, 0.15);
}

.audio-player.is-ready .waveform-host {
  opacity: 1;
}

.waveform-controls {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.45rem;
}

.wf-btn {
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #12161c;
  color: var(--accent);
  font-size: 0.72rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.wf-btn:hover {
  border-color: var(--accent-dim);
  background: #1a1f25;
}

.wf-time {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.waveform-host {
  width: 100%;
  min-height: 80px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0a0c0f;
  overflow: hidden;
  position: relative;
}

.waveform-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  pointer-events: none;
}

.audio-player.is-ready .waveform-loading {
  display: none;
}

.waveform-timeline {
  margin-top: 0.2rem;
  min-height: 18px;
}

.waveform-error {
  color: #a87850;
  margin: 0.2rem 0 0.45rem;
}

.audio-player.is-fallback audio.audio-fallback {
  display: block;
}

.audio-missing {
  font-size: 0.8rem;
  color: #a87850;
  margin-top: 0.35rem;
  font-style: italic;
}

@media (max-width: 700px) {
  .compare-row {
    grid-template-columns: 1fr;
  }

  .overview-pdf {
    height: 56vh;
    min-height: 320px;
  }
}

/* two-column feature grid */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem 1.25rem;
  margin-top: 1rem;
}
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.05rem;
}
.card h3 {
  margin: 0 0 0.4rem;
  font-size: 0.95rem;
}
.card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.placeholder {
  margin-top: 0.4rem;
  min-height: 104px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.86rem;
  padding: 0.8rem;
}

.overview-figure-card {
  margin-top: 1rem;
}

.overview-pdf {
  width: 100%;
  height: min(72vh, 620px);
  min-height: 420px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0a0c0f;
}

.trackb-pdf {
  margin-top: 0.85rem;
  height: min(56vh, 520px);
  min-height: 320px;
}

.demo-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.65rem;
  font-size: 0.92rem;
}

.demo-table th,
.demo-table td {
  border: 1px solid var(--border);
  padding: 0.55rem 0.6rem;
  text-align: left;
  vertical-align: top;
}

.demo-table th {
  background: #141a21;
  color: #d8dde6;
}

/* unified demo formatting */
#demos .grid-2,
#compare .grid-2 {
  grid-template-columns: 1fr;
}

/* align demo typography with gold label style */
#demos h3,
#compare h3 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-weight: 600;
  margin: 1rem 0 0.45rem;
}

#demos .card h3,
#compare .card h3 {
  margin: 0 0 0.45rem;
}

#demos .col-label,
#compare .col-label {
  color: var(--accent);
}

#demos .card,
#compare .card {
  margin-top: 1rem;
}

#demos .compare-block,
#compare .compare-block {
  margin-top: 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 1.05rem;
}

#demos .compare-row,
#compare .compare-row {
  grid-template-columns: 1fr;
  gap: 0.85rem;
  padding: 0.55rem 0;
  border-top: none;
}

#demos .compare-row:nth-child(odd),
#compare .compare-row:nth-child(odd) {
  background: none;
  margin: 0;
  padding-left: 0;
  padding-right: 0;
  border-radius: 0;
}

#demos .compare-row + .compare-row,
#compare .compare-row + .compare-row {
  border-top: 1px solid var(--border);
}

#demos .stem-stack {
  display: grid;
  gap: 0.95rem;
}

#demos .stem-item {
  padding-bottom: 0.1rem;
}

#demos .stem-item .caption {
  margin-bottom: 0.35rem;
}

#demos .metadata-block {
  margin-top: 1rem;
  max-width: 100%;
  min-width: 0;
}

#demos .metadata-snippet-title {
  margin-top: 1rem;
}

#demos pre.cite,
#demos pre.cite code {
  max-width: 100%;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

#demos .grid-2 > .card {
  min-width: 0;
}

/* code / cite */
.cite {
  font-size: 0.85rem;
  color: var(--text-muted);
  background: #0a0c0f;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  line-height: 1.5;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
}

footer.site-footer {
  padding: 2rem 0 3rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.86rem;
}

.sr-hint {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.demo-image { display: block; width: 100%; height: auto; max-height: 360px; object-fit: cover; border-radius: 8px; margin-bottom: 12px; }

.result-dashboard {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0a0c0f;
  transition: border-color 0.15s;
}

a:hover .result-dashboard {
  border-color: var(--accent-dim);
}