:root {
  color-scheme: light;
  --bg: #f6f3ec;
  --ink: #171712;
  --muted: #6c675c;
  --line: #d9d1c2;
  --panel: #fffdf8;
  --panel-2: #ece6d9;
  --green: #1b7d43;
  --red: #a13a2a;
  --blue: #315e88;
  --gold: #9b6d1f;
  --shadow: 0 18px 50px rgba(44, 37, 24, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.4;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

.topbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 22px clamp(16px, 3vw, 36px) 14px;
  border-bottom: 1px solid var(--line);
}

.ao-link,
.source-link,
.button,
.icon-button,
.segment,
.version-button {
  min-height: 38px;
}

.ao-link {
  text-decoration: none;
}

.ao-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-weight: 800;
  letter-spacing: 0;
}

.eyebrow,
.label {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(1.65rem, 3.4vw, 3.05rem);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: 1.2rem;
  line-height: 1.1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 0.9rem;
  letter-spacing: 0;
}

.source-link,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: 0 16px;
  background: var(--ink);
  color: #fffdf8;
  font-size: 0.88rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.summary-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.7);
}

.summary-strip > div {
  min-width: 0;
  padding: 14px clamp(14px, 2vw, 24px);
  border-right: 1px solid var(--line);
}

.summary-strip > div:last-child {
  border-right: 0;
}

.metric {
  display: block;
  font-size: 1.35rem;
  font-weight: 850;
  line-height: 1;
}

.source-state span:last-child {
  display: block;
  margin-top: 4px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 750;
}

.analysis-band {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.35fr);
  gap: 16px;
  align-items: start;
  padding: 14px clamp(16px, 3vw, 36px);
  border-bottom: 1px solid var(--line);
  background: #fffdf8;
}

.analysis-band h2 {
  margin-top: 6px;
  font-size: clamp(1.2rem, 2.1vw, 1.72rem);
  line-height: 1.08;
  max-width: 620px;
}

.analysis-points {
  display: grid;
  gap: 8px;
}

.analysis-point {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 720;
}

.analysis-point span:first-child {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--ink);
  color: #fffdf8;
  font-size: 0.74rem;
  font-weight: 900;
}

.analysis-point p {
  margin: 0;
}

.analysis-boundary {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 720;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(190px, 0.72fr) minmax(0, 1.85fr) minmax(260px, 1fr);
  gap: 18px;
  width: min(1680px, 100%);
  margin: 0 auto;
  padding: 18px clamp(14px, 2vw, 28px) 28px;
}

.version-rail,
.version-panel,
.change-panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.version-rail,
.change-panel {
  align-self: start;
  position: sticky;
  top: 12px;
}

.rail-head,
.change-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.rail-head span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.version-buttons {
  display: grid;
  gap: 1px;
  background: var(--line);
}

.version-button {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  width: 100%;
  border: 0;
  padding: 12px 14px;
  background: var(--panel);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.version-button:hover,
.version-button.active {
  background: #ece7dc;
}

.version-button.active {
  box-shadow: inset 4px 0 0 var(--green);
}

.version-num {
  font-weight: 900;
}

.version-main {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.version-name {
  overflow: hidden;
  color: var(--muted);
  font-size: 0.86rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.version-date {
  overflow: hidden;
  color: var(--muted-soft);
  font-size: 0.68rem;
  font-weight: 760;
  line-height: 1.1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.version-count {
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 850;
}

.version-panel {
  overflow: hidden;
}

.version-header {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 18px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, #fffdf8, #f0eadf);
}

.cover-art {
  width: 118px;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-2);
  object-fit: cover;
}

.version-title-block h2 {
  margin: 4px 0 14px;
  font-size: clamp(2rem, 4.2vw, 4.4rem);
  line-height: 0.9;
  word-break: break-word;
}

.version-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #fffdf8;
  color: var(--ink);
  cursor: pointer;
}

.icon-button span {
  font-weight: 900;
}

.version-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: 1px solid var(--line);
}

.version-facts > div {
  padding: 14px 18px;
  border-right: 1px solid var(--line);
}

.version-facts > div:last-child {
  border-right: 0;
}

.fact-value {
  display: block;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 850;
  line-height: 1.05;
  overflow-wrap: anywhere;
}

.artist-band {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}

.artist-chip {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 10px;
  background: #fbf7ee;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 750;
}

.artist-chip strong {
  color: var(--ink);
}

.playlist-profile {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.75fr);
  gap: 18px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: #faf6ee;
}

.playlist-profile p:not(.eyebrow) {
  margin: 6px 0 0;
  font-size: 1rem;
  font-weight: 760;
}

.vibe-tags,
.genre-mix {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.vibe-tag,
.genre-pill {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 10px;
  background: #fffdf8;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 820;
}

.genre-pill strong {
  color: var(--ink);
}

.track-toolbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}

.search-label {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

#trackSearch {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  padding: 0 14px;
}

.track-list {
  display: grid;
}

.track-row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  min-height: 56px;
  padding: 8px 18px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.track-row:hover {
  background: #f7f0e3;
}

.track-index {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.track-title {
  display: block;
  overflow-wrap: anywhere;
  font-weight: 850;
}

.track-artist {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.9rem;
  overflow-wrap: anywhere;
}

.track-duration {
  color: var(--muted);
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
}

.change-panel {
  overflow: hidden;
}

.change-head {
  display: block;
}

.change-head h2 {
  margin-top: 4px;
}

.change-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: 1px solid var(--line);
}

.change-stats div {
  padding: 12px 8px;
  border-right: 1px solid var(--line);
  text-align: center;
}

.change-stats div:last-child {
  border-right: 0;
}

.change-stats strong {
  display: block;
  font-size: 1.15rem;
}

.change-stats span {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.change-focus {
  display: grid;
  gap: 8px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.focus-line {
  display: grid;
  grid-template-columns: 8px minmax(0, 1fr);
  gap: 9px;
  align-items: baseline;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.focus-line::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 10px;
  gap: 6px;
  border-bottom: 1px solid var(--line);
}

.segment {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fffdf8;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 850;
}

.segment.active {
  background: var(--ink);
  color: #fffdf8;
  border-color: var(--ink);
}

.change-list {
  max-height: 420px;
  overflow: auto;
  border-bottom: 1px solid var(--line);
}

.change-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}

.change-item:last-child {
  border-bottom: 0;
}

.change-tag {
  min-width: 42px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
}

.change-item strong {
  display: block;
  overflow-wrap: anywhere;
}

.change-item span {
  display: block;
  color: var(--muted);
  font-size: 0.86rem;
  overflow-wrap: anywhere;
}

.chain {
  padding: 14px;
}

.chain-list {
  display: grid;
  gap: 8px;
}

.chain-button {
  display: grid;
  grid-template-columns: minmax(70px, auto) minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fffdf8;
  color: var(--ink);
  padding: 9px;
  cursor: pointer;
  text-align: left;
}

.chain-button.active,
.chain-button:hover {
  border-color: var(--ink);
  background: #f4eddf;
}

.chain-button strong {
  font-size: 0.84rem;
}

.chain-button span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 750;
}

.empty {
  padding: 18px;
  color: var(--muted);
  font-weight: 750;
}

@media (max-width: 1120px) {
  .app-shell {
    grid-template-columns: minmax(190px, 0.8fr) minmax(0, 1.7fr);
  }

  .change-panel {
    grid-column: 1 / -1;
    position: static;
  }
}

@media (max-width: 760px) {
  .topbar {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .source-link {
    grid-column: 1 / -1;
    justify-self: start;
  }

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

  .summary-strip > div {
    border-bottom: 1px solid var(--line);
  }

  .analysis-band {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .app-shell {
    display: block;
    padding: 12px;
  }

  .version-rail,
  .version-panel,
  .change-panel {
    position: static;
    margin-bottom: 12px;
  }

  .version-buttons {
    display: flex;
    gap: 1px;
    overflow-x: auto;
  }

  .version-button {
    min-width: 146px;
    grid-template-columns: auto minmax(0, 1fr);
  }

  .version-count {
    grid-column: 1 / -1;
  }

  .version-header {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 12px;
    padding: 14px;
  }

  .cover-art {
    width: 88px;
  }

  .version-title-block h2 {
    font-size: clamp(1.8rem, 12vw, 3rem);
  }

  .version-facts,
  .change-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .version-facts > div:nth-child(2),
  .change-stats div:nth-child(2) {
    border-right: 0;
  }

  .track-toolbar {
    grid-template-columns: 1fr;
  }

  .playlist-profile {
    grid-template-columns: 1fr;
  }

  .track-row {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .track-duration {
    grid-column: 2;
  }
}