.layer-lab-link { display: inline-flex; align-items: center; text-decoration: none; }
.layer-page { min-height: 100vh; background: #f4f0e7; }
.layer-shell { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 58px 0 90px; }
.layer-intro { display: grid; grid-template-columns: 1.1fr .9fr; align-items: end; gap: 70px; margin-bottom: 38px; }
.layer-intro h1 { margin: 8px 0 0; font-size: clamp(2.7rem, 6vw, 5.7rem); line-height: .9; letter-spacing: -.065em; }
.layer-intro h1 em { color: #bd7a05; font-family: Georgia, serif; font-weight: 400; }
.layer-intro p { max-width: 530px; margin: 0 0 7px; color: var(--muted); font-size: 1.02rem; line-height: 1.65; }
.layer-mode-switch { display: inline-grid; grid-template-columns: 1fr 1fr; gap: 4px; margin-bottom: 14px; padding: 4px; border: 1px solid var(--line); border-radius: 14px; background: #e8e1d4; }
.layer-mode-switch button { display: grid; gap: 2px; min-width: 180px; padding: 10px 15px; border: 0; border-radius: 10px; color: var(--muted); background: transparent; text-align: left; cursor: pointer; }
.layer-mode-switch button.active { color: #fff; background: #171914; }
.layer-mode-switch strong { font-size: .85rem; }
.layer-mode-switch span { font-size: .68rem; }
.layer-inputs { display: grid; grid-template-columns: 1fr 74px 1fr; align-items: stretch; }
.layer-inputs.single #masterDrop, .layer-inputs.single .layer-link-mark { display: none; }
.layer-inputs.single #overlayDrop { grid-column: 1 / -1; width: min(720px, 100%); justify-self: center; }
.layer-drop { position: relative; min-height: 230px; padding: 27px; border: 1px dashed #aaa08e; border-radius: 20px; background: rgba(255,255,255,.45); cursor: pointer; transition: .2s ease; }
.layer-drop:hover, .layer-drop.drag { border-color: #d28a08; background: #fffaf0; transform: translateY(-2px); }
.layer-drop.ready { border-style: solid; border-color: #1a756a; background: #f3faf7; }
.layer-number { position: absolute; top: 22px; right: 24px; color: #c88409; font-size: 2.2rem; font-weight: 900; opacity: .32; }
.layer-drop small { display: block; color: var(--muted); font-size: .72rem; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.layer-drop strong { display: block; max-width: 80%; margin-top: 36px; font-size: clamp(1.25rem, 2.2vw, 1.75rem); }
.layer-drop p { margin: 7px 0 24px; color: var(--muted); }
.layer-drop output { display: inline-flex; padding: 7px 10px; border-radius: 999px; background: #e7e1d5; font-size: .75rem; font-weight: 800; }
.layer-drop.ready output { color: #0d5b52; background: #d9eee8; }
.layer-link-mark { display: grid; grid-template-rows: 1fr auto 1fr; place-items: center; color: #bf7b05; }
.layer-link-mark span { width: 1px; height: 100%; background: #cfc6b5; }
.layer-link-mark b { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid #cfc6b5; border-radius: 50%; background: #f4f0e7; font-size: 1.35rem; }
.layer-analysis { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 16px; border: 1px solid var(--line); border-radius: 16px; background: #171914; color: #fff; overflow: hidden; }
.analysis-fact { padding: 18px 21px; border-right: 1px solid rgba(255,255,255,.12); }
.analysis-fact:last-child { border: 0; }
.analysis-fact small { display: block; margin-bottom: 7px; color: #abaeaa; font-size: .67rem; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.analysis-fact strong { font-size: 1.06rem; }
.analysis-health strong { color: #65d4bf; }
.layer-controls { display: grid; grid-template-columns: 1.1fr auto 1fr auto; align-items: center; gap: 25px; margin-top: 18px; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.5); }
.layer-controls > div:first-child { display: flex; gap: 12px; align-items: flex-start; }
.layer-controls h2 { margin: 0; font-size: 1.08rem; }
.layer-controls p { margin: 4px 0 0; color: var(--muted); font-size: .76rem; }
.style-pills { display: flex; padding: 4px; border: 1px solid var(--line); border-radius: 999px; background: #ece6da; }
.style-pills button { padding: 9px 13px; border: 0; border-radius: 999px; background: transparent; font-weight: 800; cursor: pointer; }
.style-pills button.active { background: #171914; color: #fff; }
.audacity-control { min-width: 190px; }
.audacity-control span { display: flex; justify-content: space-between; gap: 15px; margin-bottom: 7px; font-size: .73rem; }
.audacity-control output { color: #ad7005; font-weight: 900; }
.audacity-control input { width: 100%; accent-color: #d9910b; }
.generate-layer-btn { min-height: 48px; padding: 0 19px; border: 0; border-radius: 12px; background: #dc940f; color: #171914; font-weight: 900; cursor: pointer; }
.generate-layer-btn:disabled { opacity: .38; cursor: not-allowed; }
.layer-results { margin-top: 18px; padding: 23px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.48); }
.result-actions { display: flex; gap: 8px; }
.phrase-summary { margin: 15px 0 0; padding: 11px 14px; border-left: 3px solid #d9910b; background: #f5eddd; color: var(--muted); font-size: .78rem; line-height: 1.45; }
.result-legend { display: grid; grid-template-columns: .8fr .8fr 1.2fr; gap: 9px; margin: 18px 0 7px; padding: 0 16px; color: var(--muted); font-size: .68rem; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.layer-sequence { display: grid; gap: 7px; }
.layer-row { display: grid; grid-template-columns: 42px .8fr .8fr 1.2fr; gap: 9px; align-items: stretch; }
.layer-row-index { display: grid; place-items: center; color: #928979; font-size: .72rem; font-weight: 900; }
.layer-chord { min-width: 0; padding: 13px 14px; border: 1px solid var(--line); border-radius: 11px; background: #f0eadf; }
.layer-chord.original { position: relative; background: #e8e2d7; cursor: pointer; transition: border-color .18s ease, background .18s ease, transform .18s ease; }
.layer-chord.original::after { content: "ÉCOUTER"; position: absolute; top: 12px; right: 12px; color: #6e675b; font-size: .58rem; font-weight: 900; letter-spacing: .09em; }
.layer-chord.original:hover, .layer-chord.original:focus-visible { border-color: #7c9d94; background: #edf3ef; outline: 0; transform: translateY(-1px); }
.layer-chord.original.is-playing { animation: original-pulse .42s ease; }
@keyframes original-pulse { 50% { border-color: #1a756a; background: #d9eee8; box-shadow: 0 0 0 4px rgba(26,117,106,.11); } }
.layer-chord.generated { position: relative; border-color: #d29a31; background: #fff8e8; cursor: pointer; }
.layer-chord.generated::after { content: "ÉCOUTER"; position: absolute; top: 12px; right: 12px; color: #b57500; font-size: .58rem; font-weight: 900; letter-spacing: .09em; }
.layer-row.ending .layer-chord.generated { border-color: #b97800; box-shadow: inset 3px 0 #d9910b; }
.layer-row.ending .layer-row-index { color: #b97800; }
.layer-chord small { display: block; margin-bottom: 4px; color: var(--muted); font-size: .64rem; font-weight: 800; text-transform: uppercase; }
.layer-chord strong { font-size: 1.05rem; }
.layer-chord p { margin: 6px 0 0; color: var(--muted); font-size: .69rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.layer-empty { padding: 28px; border: 1px dashed var(--line); border-radius: 12px; color: var(--muted); text-align: center; }
.local-variation-dialog { width: min(920px, calc(100vw - 28px)); max-height: 88vh; padding: 0; border: 1px solid #c9beaa; border-radius: 22px; color: var(--ink); background: #f8f5ed; box-shadow: 0 30px 90px rgba(20,22,18,.28); }
.local-variation-dialog::backdrop { background: rgba(17,19,15,.56); backdrop-filter: blur(5px); }
.local-variation-shell { padding: 25px; }
.local-variation-shell > header { display: flex; justify-content: space-between; gap: 20px; align-items: flex-start; }
.local-variation-shell h2 { margin: 5px 0 0; font-size: clamp(1.35rem, 3vw, 2rem); }
.local-variation-shell > header button { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--ink); font-size: 1.55rem; cursor: pointer; }
.local-variation-shell > p { margin: 12px 0 21px; color: var(--muted); line-height: 1.5; }
.local-variation-ideas { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 10px; }
.local-idea { display: flex; flex-direction: column; min-width: 0; padding: 16px; border: 1px solid var(--line); border-radius: 14px; background: #fffdf8; }
.local-idea.substitution { border-top: 3px solid #d9910b; }
.local-idea.color { border-top: 3px solid #3b9d91; }
.local-idea.context { border-top: 3px solid #8a63a9; }
.local-idea.descent { border-top: 3px solid #287ca0; }
.local-idea.context small { color: #765193; }
.local-idea.color small { color: #1a756a; }
.local-idea.descent small { color: #226d8c; }
.local-idea small { color: #a36b04; font-size: .67rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.local-idea h3 { margin: 7px 0; font-size: 1.18rem; }
.local-idea p { flex: 1; margin: 0 0 14px; color: var(--muted); font-size: .77rem; line-height: 1.45; }
.local-idea-notes { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 14px; }
.local-idea-notes span { padding: 5px 7px; border-radius: 999px; background: #ece6db; font-size: .68rem; font-weight: 800; }
.local-idea-actions { display: grid; grid-template-columns: .8fr .8fr 1.15fr; gap: 7px; }
.local-idea-actions button { min-height: 38px; border: 1px solid var(--line); border-radius: 9px; background: transparent; font-weight: 850; cursor: pointer; }
.local-idea-actions .apply-local { border-color: #171914; background: #171914; color: #fff; }
.local-idea-actions .export-local { border-color: #c48718; color: #8c5b00; background: #fff8e8; }

@media (max-width: 980px) {
  .layer-controls { grid-template-columns: 1fr 1fr; }
  .layer-analysis { grid-template-columns: 1fr 1fr; }
  .analysis-fact:nth-child(2) { border-right: 0; }
  .analysis-fact:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.12); }
}
@media (max-width: 700px) {
  .layer-shell { width: min(100% - 24px, 620px); padding-top: 34px; }
  .layer-intro { grid-template-columns: 1fr; gap: 20px; }
  .layer-inputs { grid-template-columns: 1fr; }
  .layer-mode-switch { display: grid; width: 100%; }
  .layer-mode-switch button { min-width: 0; }
  .layer-link-mark { grid-template: none; height: 45px; }
  .layer-link-mark span { display: none; }
  .layer-controls { grid-template-columns: 1fr; }
  .style-pills { display: grid; grid-template-columns: 1fr 1fr; border-radius: 14px; }
  .result-legend { display: none; }
  .layer-row { grid-template-columns: 32px 1fr; }
  .layer-chord { grid-column: 2; }
  .layer-row-index { grid-row: 1 / 4; }
  .result-actions { flex-wrap: wrap; }
  .local-variation-shell { padding: 18px 14px; }
  .local-variation-ideas { grid-template-columns: 1fr; }
}