:root {
  color-scheme: dark;
  --bg: #0A0A0B;
  --surface: #101012;
  --surface-raised: #17171A;
  --surface-hover: #202025;
  --rule: #26262B;
  --rule-strong: #3B3B43;
  --wave-bg: #070708;
  --ink: #EDEDEF;
  --ink-dim: #9A9AA2;
  --ink-faint: #62626B;
  --signal: #F0E31C;
  --signal-hover: #FFF75A;
  --signal-veil: rgba(240, 227, 28, 0.09);
  --danger: #F2544A;
  --danger-veil: rgba(242, 84, 74, 0.45);
  --ok: #48C25C;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius: 2px;
  --frame: 32px;
  --shadow-float: 0 14px 40px rgba(0, 0, 0, 0.7);
  --ease: 110ms ease;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button, input, select { font: inherit; color: inherit; }

svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

.app {
  max-width: 1200px;
  margin: 20px auto 0;
  padding: 0 var(--frame) var(--frame);
  border: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.label {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
}

.panel-title {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* --- top bar --- */

.topbar {
  display: flex;
  align-items: center;
  gap: 26px;
  margin: 0 calc(-1 * var(--frame));
  padding: 16px var(--frame);
  border-bottom: 1px solid var(--signal);
}

.topbar__group { display: flex; align-items: center; gap: 10px; min-width: 0; }
.topbar__group--path { flex: 1; min-width: 0; }
.topbar__group--end { margin-left: auto; gap: 8px; }

.path {
  color: var(--ink-faint);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.path--set { color: var(--ink); }

/* --- controls --- */

.select {
  appearance: none;
  background: transparent url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%239A9AA2' stroke-width='1.2'/%3E%3C/svg%3E") no-repeat right 2px center;
  background-size: 9px;
  border: 0;
  border-bottom: 1px solid var(--rule-strong);
  border-radius: 0;
  padding: 4px 20px 4px 2px;
  cursor: pointer;
  transition: border-color var(--ease), color var(--ease);
}
.select:hover:not(:disabled) { border-bottom-color: var(--signal); }
.select:disabled {
  background-image: none;
  border-bottom-color: transparent;
  color: var(--ink-faint);
  cursor: default;
}
.select option { background: var(--surface-raised); color: var(--ink); }

.bank-nav { display: flex; align-items: center; gap: 4px; }

.select:focus-visible, .btn:focus-visible, input:focus-visible {
  outline: 1px solid var(--signal);
  outline-offset: 2px;
}

.check { display: inline-flex; align-items: center; gap: 8px; color: var(--ink-dim); white-space: nowrap; }

input[type="checkbox"] {
  appearance: none;
  position: relative;
  width: 13px;
  height: 13px;
  margin: 0;
  background: var(--surface-raised);
  border: 1px solid var(--rule-strong);
  cursor: pointer;
  transition: background var(--ease), border-color var(--ease);
}
input[type="checkbox"]:checked { background: var(--signal); border-color: var(--signal); }
input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 0;
  width: 4px;
  height: 8px;
  border: solid var(--bg);
  border-width: 0 2px 2px 0;
  transform: rotate(42deg);
}
input[type="checkbox"]:disabled { opacity: 0.45; cursor: default; }

.unit { color: var(--ink-faint); }

.btn {
  background: none;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius);
  color: var(--ink);
  padding: 6px 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--ease), border-color var(--ease), color var(--ease);
}
.btn:hover:not(:disabled) { border-color: var(--ink-faint); background: var(--surface-hover); }
.btn:disabled { opacity: 0.35; cursor: default; }

.btn--quiet {
  border: 0;
  border-bottom: 1px solid var(--rule-strong);
  border-radius: 0;
  padding: 2px 1px;
  color: var(--ink-dim);
}
.btn--quiet:hover:not(:disabled) { background: none; color: var(--signal); border-bottom-color: var(--signal); }

.btn--icon { display: inline-flex; align-items: center; justify-content: center; padding: 6px 8px; }
.btn--icon.btn--quiet { border: 1px solid transparent; border-radius: var(--radius); padding: 4px 5px; }
.btn--icon.btn--quiet:hover:not(:disabled) { background: var(--surface-hover); border-color: var(--rule-strong); color: var(--ink); }

.btn--primary { background: var(--signal); border-color: var(--signal); color: var(--bg); }
.btn--primary:hover:not(:disabled) { background: var(--signal-hover); border-color: var(--signal-hover); color: var(--bg); }

.btn--bank {
  min-width: 24px;
  padding: 3px 0;
  border-color: transparent;
  text-align: center;
  color: var(--ink-dim);
}
.btn--bank:hover:not(.is-current) { border-color: var(--rule-strong); }
.btn--bank.has-samples, .btn--bank.has-samples:hover { border-color: var(--signal); }
.btn--bank.is-current, .btn--bank.is-current:hover:not(:disabled) {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--bg);
  font-weight: 500;
}

.btn--danger { border-color: var(--danger-veil); color: var(--danger); }
.btn--danger:hover:not(:disabled) { background: rgba(242, 84, 74, 0.1); border-color: var(--danger); }
.btn--quiet.btn--danger:not(.btn--icon):hover:not(:disabled) {
  background: none;
  color: var(--danger);
  border-bottom-color: var(--danger);
}

.btn[data-play].is-playing { color: var(--ok); border-color: rgba(72, 194, 92, 0.55); }
.btn[data-play] .icon-stop, .btn[data-play].is-playing .icon-play { display: none; }
.btn[data-play].is-playing .icon-stop { display: block; }

/* --- pads --- */

.pads {
  display: grid;
  grid-template-columns: 52px minmax(120px, 1fr) minmax(190px, 1.5fr) 104px 52px max-content;
  column-gap: 16px;
}

.pads__head, .pad {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: subgrid;
  align-items: center;
  padding: 0 14px;
}

.pads__head {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}
.pads__head-end { text-align: right; }

.pad {
  padding-block: 8px;
  transition: background var(--ease), box-shadow var(--ease);
}
.pad:hover { background: var(--surface); }
.pad.is-selected {
  background: linear-gradient(90deg, var(--signal-veil), rgba(240, 227, 28, 0) 65%);
  box-shadow: inset 3px 0 0 var(--signal);
}
.pad.is-dropping { background: var(--signal-veil); box-shadow: inset 0 0 0 1px var(--signal); }

.pad__id {
  margin: 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-dim);
}
.pad.is-selected .pad__id { color: var(--signal); }
.pad.is-empty .pad__id { color: var(--ink-faint); }

.pad__name {
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.pad.is-empty .pad__name { color: var(--ink-faint); }

.pad__stage { position: relative; }
.pad.is-empty .pad__stage::after {
  content: "drop .wav";
  position: absolute;
  inset: 0;
  display: grid;
  align-items: center;
  padding-left: 12px;
  color: var(--ink-faint);
  pointer-events: none;
}

.pad__wave, .detail__wave {
  display: block;
  width: 100%;
  background: var(--wave-bg);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  cursor: pointer;
}
.pad__wave { height: 46px; }
.pad.is-empty .pad__wave { border-style: dashed; cursor: default; }

.pad__mono { justify-self: start; }
.pad.is-empty .pad__mono { visibility: hidden; }

.pad__actions { display: flex; gap: 8px; justify-self: end; }
.pad.is-empty .pad__actions .btn:not([data-load]) { display: none; }
.pad.is-empty [data-load] { border-color: var(--signal); color: var(--signal); }
.pad.is-selected:not(.is-empty) [data-play]:not(.is-playing),
.pad.is-selected:not(.is-empty) [data-chop] { border-color: var(--signal); color: var(--signal); }

.row { display: flex; align-items: center; gap: 12px; }
.row .select { margin-right: auto; }
.row .check { margin-left: auto; }

/* --- selected pad --- */

.detail {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 13px 16px 16px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-top: 1px solid var(--signal);
  border-radius: var(--radius);
}
.detail__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 14px; }
.detail__name { color: var(--signal); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.detail__length { margin-left: auto; color: var(--ink-faint); }
.detail__head .btn { align-self: center; }
.detail__wave { height: 168px; }

.warnings { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.warnings li { font-size: 12px; color: var(--signal); }

/* --- footer --- */

.actions { display: flex; align-items: center; gap: 8px; }
.actions .hint { margin-right: 16px; }
.actions .btn--danger { margin-left: auto; }
.actions .btn--danger + .btn--danger { margin-left: 0; }

/* --- hint --- */

.hint { position: relative; display: inline-flex; }
.hint__mark {
  width: 24px;
  height: 24px;
  padding: 0;
  background: none;
  border: 1px solid var(--rule-strong);
  border-radius: 50%;
  color: var(--ink-faint);
  font-size: 12px;
  cursor: help;
}
.hint__mark:hover, .hint__mark:focus-visible { border-color: var(--signal); color: var(--signal); }
.hint__bubble {
  position: absolute;
  bottom: calc(100% + 10px);
  left: -12px;
  z-index: 2;
  width: 360px;
  padding: 14px 16px;
  background: var(--surface-raised);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-float);
  color: var(--ink-dim);
  line-height: 1.6;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--ease);
}
.hint:hover .hint__bubble, .hint:focus-within .hint__bubble { opacity: 1; visibility: visible; }
.hint__steps { margin: 8px 0 0; padding-left: 18px; display: grid; gap: 6px; }
.hint__steps li::marker { color: var(--signal); }

/* --- toast --- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  margin: 0;
  padding: 11px 18px;
  background: var(--surface-raised);
  border: 1px solid var(--rule-strong);
  border-left: 3px solid var(--signal);
  border-radius: var(--radius);
  box-shadow: var(--shadow-float);
  max-width: 70vw;
}
.toast--error { border-left-color: var(--danger); }
.toast--done { border-left-color: var(--ok); }

/* --- dialog --- */

.dialog {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--rule-strong);
  border-top: 1px solid var(--signal);
  border-radius: var(--radius);
  box-shadow: var(--shadow-float);
  padding: 0;
  min-width: 380px;
}
.dialog::backdrop { background: rgba(4, 4, 5, 0.78); }
.dialog__body { display: flex; flex-direction: column; gap: 16px; padding: 22px; }
.dialog__target { color: var(--signal); margin: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dialog__row { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.dialog__actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 4px; }
.dialog__aside { margin-right: auto; }

.dialog--wide { width: min(760px, 92vw); }
.dialog__note { margin: -4px 0 0; color: var(--ink-dim); line-height: 1.6; }

/* --- chop kit --- */

.input {
  background: var(--surface-raised);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius);
  padding: 5px 9px;
  width: 76px;
  text-align: right;
  appearance: textfield;
}
.input::-webkit-outer-spin-button, .input::-webkit-inner-spin-button { appearance: none; }

.kit {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  background: var(--wave-bg);
  border: 1px dashed var(--rule-strong);
  border-radius: var(--radius);
}
.kit.is-dropping { border-color: var(--signal); border-style: solid; background: var(--signal-veil); }

.kit__list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 232px;
  overflow-y: auto;
}
.kit__list:empty::after {
  content: "Drop WAV files here, in the order you want the sections";
  display: block;
  padding: 10px 2px;
  color: var(--ink-faint);
}

.kit__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 5px 8px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}
.kit__item--silent {
  justify-content: center;
  border-style: dashed;
  background: none;
  color: var(--ink-faint);
  font-size: 12px;
}

.kit__index { width: 16px; color: var(--ink-faint); text-align: right; }
.kit__wave { width: 108px; height: 34px; background: var(--wave-bg); }
.kit__name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.kit__length { color: var(--ink-faint); }

.kit__controls { display: flex; flex-direction: column; gap: 12px; }
.kit__controls .label { width: 92px; }
.kit__controls .input + .unit { margin-right: auto; }

.kit__limits { display: flex; flex-wrap: wrap; gap: 6px; }
.kit__limit {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 3px 9px;
  background: var(--surface-raised);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}
.kit__limit-rate { font-size: 11px; color: var(--ink-faint); }
.kit__limit-value { color: var(--ink-dim); }
.kit__limit--current { border-color: var(--signal); background: var(--signal-veil); }
.kit__limit--current .kit__limit-rate { color: var(--signal); }
.kit__limit--current .kit__limit-value { color: var(--ink); }
.kit__limit--short .kit__limit-value { color: var(--danger); }

.kit__figures { display: flex; gap: 40px; }
.figure { display: flex; align-items: baseline; gap: 12px; }
.figure__value { font-size: 18px; font-weight: 500; letter-spacing: -0.01em; }
.figure__value--over { color: var(--danger); }

.kit__message { margin: 0; font-size: 12px; min-height: 34px; }
.kit__message--hint { color: var(--ink-faint); }
.kit__message--error { color: var(--danger); }

@media (max-width: 900px) {
  :root { --frame: 20px; }
  .pads {
    grid-template-columns: 44px minmax(90px, 1fr) minmax(130px, 1.2fr) 92px 44px max-content;
    column-gap: 12px;
  }
  .topbar { flex-wrap: wrap; gap: 16px; }
}

@media (max-width: 700px) {
  .pads { display: flex; flex-direction: column; }
  .pads__head { display: none; }
  .pad {
    grid-template-columns: 40px 1fr auto;
    grid-template-areas:
      "id   name    mono"
      "wave wave    wave"
      "rate rate    rate"
      "actions actions actions";
    gap: 8px 12px;
    border-bottom: 1px solid var(--rule);
  }
  .pad__id { grid-area: id; }
  .pad__name { grid-area: name; }
  .pad__stage { grid-area: wave; }
  .pad__rate { grid-area: rate; justify-self: start; }
  .pad__mono { grid-area: mono; justify-self: end; }
  .pad__actions { grid-area: actions; }
}

@media (max-width: 560px) {
  .topbar { flex-direction: column; align-items: stretch; gap: 12px; }
  .topbar__group { flex-wrap: wrap; }
  .topbar__group--end { margin-left: 0; }
  .actions { flex-wrap: wrap; }
  .actions .btn--danger { margin-left: 0; }
  .hint__bubble { position: fixed; left: var(--frame); right: var(--frame); bottom: 64px; width: auto; }
  .kit__wave { display: none; }
  .kit__controls .label { width: auto; }
  .kit__controls .row:has(.kit__limits) { flex-direction: column; align-items: flex-start; gap: 6px; }
  .kit__figures { gap: 22px; }
}

.boot-notice {
  max-width: 600px;
  margin: 16vh auto 0;
  padding: 28px 30px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-top: 1px solid var(--signal);
  border-radius: var(--radius);
  line-height: 1.7;
}
.boot-notice__title {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--signal);
}
.boot-notice p { margin: 0 0 14px; color: var(--ink-dim); }
.boot-notice a { color: var(--signal); }
.boot-notice__command {
  margin: 0 0 14px;
  padding: 12px 14px;
  background: var(--wave-bg);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--ink);
  overflow-x: auto;
}