:root {
  --bg: #0c1017; --panel: #10151d; --panel2: #141b24; --border: #232b36;
  --text: #e6e9ec; --muted: #99a3ad; --amber: #e8a33d; --amber-ink: #14100a;
  --rec: #e4574d; --ok: #57d98a;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { background: var(--bg); color: var(--text); font: 16px/1.65 var(--sans); }
.wrap { max-width: 1020px; margin: 0 auto; padding: 0 24px; }
a { color: var(--amber); }

nav { display: flex; align-items: center; gap: 10px; padding: 18px 0; }
nav .brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
nav .brand img { width: 24px; height: 24px; }
nav .brand b { font: 700 15px/1 var(--mono); letter-spacing: .14em; }
nav .cta { margin-left: auto; }
.btn {
  display: inline-block; text-decoration: none; cursor: pointer;
  font: 600 14px/1 var(--mono); letter-spacing: .05em;
  background: var(--amber); color: var(--amber-ink); border: 0;
  padding: 13px 20px; border-radius: 4px;
}
.btn:hover, .btn:focus-visible { background: #f4b658; outline: none; }
.btn.small { padding: 10px 15px; font-size: 12.5px; }
.btn.outline { background: transparent; color: var(--amber); border: 1px solid var(--amber); }
.btn.outline:hover, .btn.outline:focus-visible { background: var(--amber); color: var(--amber-ink); }
.btn:disabled { opacity: .35; cursor: not-allowed; }
.btn:disabled:hover { background: var(--amber); color: var(--amber-ink); }
.btn.outline:disabled:hover { background: transparent; color: var(--amber); }
.ghost { font: 500 13px/1 var(--mono); color: var(--amber); margin-left: 14px; text-decoration: none; background: none; border: 0; cursor: pointer; }

/* hero / viewfinder motif */
.hero { padding: 48px 0 72px; }
.vf { position: relative; padding: 34px 30px 30px; }
.vf::before, .vf::after, .vf i::before, .vf i::after {
  content: ""; position: absolute; width: 26px; height: 26px; border: 2px solid var(--amber);
}
.vf::before { top: 0; left: 0; border-right: 0; border-bottom: 0; }
.vf::after { top: 0; right: 0; border-left: 0; border-bottom: 0; }
.vf i::before { bottom: 0; left: 0; border-right: 0; border-top: 0; }
.vf i::after { bottom: 0; right: 0; border-left: 0; border-top: 0; }
.osd { display: flex; justify-content: space-between; font: 500 12px/1 var(--mono); color: var(--amber); letter-spacing: .08em; margin-bottom: 30px; }
/* Steady green dot — a power LED on an amp, not a REC light. */
.osd .rec::before { content: "●"; color: var(--ok); margin-right: 7px; }
h1 { font: 750 clamp(30px, 5vw, 48px)/1.1 var(--sans); letter-spacing: -.015em; max-width: 21ch; text-wrap: balance; margin-bottom: 18px; }
h1 em { font-style: normal; color: var(--amber); }
.hero p.sub { color: var(--muted); max-width: 54ch; margin-bottom: 28px; font-size: 17px; }
.proof { margin-top: 34px; display: flex; gap: 28px; flex-wrap: wrap; font: 500 12.5px/1.5 var(--mono); color: var(--muted); letter-spacing: .04em; }
.proof b { color: var(--text); display: block; font-size: 17px; font-variant-numeric: tabular-nums; }

/* equalizer ornament (landing hero) */
.eq { display: inline-flex; align-items: flex-end; gap: 4px; height: 22px; margin-left: 14px; vertical-align: -3px; }
.eq span { width: 4px; background: var(--amber); border-radius: 1px; animation: eq 1.15s ease-in-out infinite; }
.eq span:nth-child(1) { height: 30%; animation-delay: 0s; }
.eq span:nth-child(2) { height: 75%; animation-delay: .18s; }
.eq span:nth-child(3) { height: 50%; animation-delay: .36s; }
.eq span:nth-child(4) { height: 95%; animation-delay: .09s; }
.eq span:nth-child(5) { height: 40%; animation-delay: .27s; }
@keyframes eq { 50% { transform: scaleY(.45); } }
.eq span { transform-origin: bottom; }
@media (prefers-reduced-motion: reduce) { .eq span { animation: none; } }

section { padding: 56px 0; border-top: 1px solid var(--border); }
h2 { font: 700 clamp(22px, 3vw, 28px)/1.2 var(--sans); margin-bottom: 8px; text-wrap: balance; }
.kicker { font: 600 11.5px/1 var(--mono); letter-spacing: .16em; color: var(--amber); text-transform: uppercase; margin-bottom: 12px; }
.lead { color: var(--muted); max-width: 62ch; margin-bottom: 30px; }

.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 20px 22px; }
.card h3 { font-size: 16px; margin-bottom: 8px; }
.card .n { font: 600 11px/1 var(--mono); color: var(--amber); letter-spacing: .1em; display: block; margin-bottom: 12px; }
.card p { color: var(--muted); font-size: 14.5px; }

.verify { background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 26px 28px; }
.verify ol { margin: 14px 0 0 18px; color: var(--muted); font-size: 15px; display: grid; gap: 8px; }
.verify code { font: 500 13px/1.6 var(--mono); background: var(--panel2); border: 1px solid var(--border); border-radius: 3px; padding: 1px 7px; color: var(--text); }

.chips { display: flex; gap: 10px; flex-wrap: wrap; }
.chip { font: 500 13px/1 var(--mono); letter-spacing: .03em; color: var(--text); border: 1px solid var(--border); background: var(--panel); border-radius: 3px; padding: 10px 14px; }

details { border: 1px solid var(--border); border-radius: 6px; background: var(--panel); padding: 0; margin-bottom: 10px; }
summary { cursor: pointer; padding: 15px 20px; font-weight: 600; font-size: 15px; list-style: none; display: flex; justify-content: space-between; align-items: center; }
summary::after { content: "+"; color: var(--amber); font: 400 18px/1 var(--mono); }
details[open] summary::after { content: "–"; }
details p { padding: 0 20px 16px; color: var(--muted); font-size: 14.5px; max-width: 70ch; }
details a { color: var(--amber); }

.final { text-align: center; padding: 72px 0 84px; }
.final h2 { max-width: 26ch; margin: 0 auto 24px; }

footer { border-top: 1px solid var(--border); padding: 26px 0 40px; color: var(--muted); font-size: 13px; }
footer .row { display: flex; gap: 18px; flex-wrap: wrap; align-items: baseline; }
footer p { margin-top: 12px; max-width: 90ch; font-size: 12.5px; }

/* ---------------- app ---------------- */
.app-main { padding-bottom: 64px; }
.app-main section { border-top: 0; padding: 18px 0; }

/* Extra padding keeps text clear of the 26px corner brackets. */
.picker.vf { margin: 10px 0 6px; padding: 36px 46px 40px; }
.picker .osd { margin-bottom: 26px; }
.picker .actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.picker .cap-note { margin-top: 16px; font: 500 12.5px/1.6 var(--mono); color: var(--muted); letter-spacing: .03em; max-width: 76ch; }
@media (max-width: 640px) { .picker.vf { padding: 32px 34px 34px; } }
.picker.dropready { outline: 2px dashed var(--amber); outline-offset: 10px; border-radius: 8px; }

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 18px 20px; }
.settings { display: grid; grid-template-columns: repeat(auto-fit, minmax(235px, 1fr)); gap: 14px 18px; }
.settings-hint { margin-top: 14px; font: 500 12px/1.6 var(--mono); color: var(--muted); letter-spacing: .03em; }
details.adv { border: 0; background: transparent; border-radius: 0; margin: 10px 0 0; }
details.adv summary { padding: 4px 0; font: 600 10.5px/1 var(--mono); letter-spacing: .14em; color: var(--muted); text-transform: uppercase; }
details.adv summary::after { font-size: 14px; }
details.adv .adv-grid { margin-top: 10px; max-width: 900px; }
.settings label { display: block; }
.settings .lbl { font: 600 10.5px/1 var(--mono); letter-spacing: .14em; color: var(--muted); text-transform: uppercase; display: block; margin-bottom: 7px; }
.settings select, .settings input[type="number"] {
  width: 100%; background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  border-radius: 4px; padding: 9px 10px; font: 500 13px/1.2 var(--mono);
}
.settings select:focus-visible, .settings input:focus-visible { outline: 1px solid var(--amber); border-color: var(--amber); }

.toolbar { display: flex; gap: 12px; align-items: center; margin: 22px 0 12px; flex-wrap: wrap; }
.toolbar .status { margin-left: auto; font: 500 12px/1.5 var(--mono); color: var(--muted); letter-spacing: .04em; text-align: right; }
.toolbar .status.done { color: var(--ok); }

.gbar { height: 3px; background: var(--panel2); border-radius: 2px; overflow: hidden; margin: 6px 0 14px; }
.gbar i { display: block; height: 100%; width: 0; background: var(--amber); transition: width .2s ease; }

.filewrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 6px; background: var(--panel); }
table.files { width: 100%; border-collapse: collapse; font: 500 12.5px/1.5 var(--mono); font-variant-numeric: tabular-nums; }
table.files th {
  text-align: left; font: 600 10.5px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted); padding: 12px 12px; border-bottom: 1px solid var(--border); white-space: nowrap;
}
table.files td { padding: 9px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; vertical-align: middle; }
table.files tr:last-child td { border-bottom: 0; }
table.files td.name { max-width: 320px; overflow: hidden; text-overflow: ellipsis; color: var(--text); }
table.files td.num { text-align: right; }
table.files .dim { color: var(--muted); }
.badge { display: inline-block; font: 600 10px/1 var(--mono); letter-spacing: .08em; border: 1px solid var(--border); color: var(--muted); border-radius: 3px; padding: 4px 7px; }
.badge.lossless { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 45%, var(--border)); }
.badge.native { color: var(--amber); border-color: color-mix(in srgb, var(--amber) 45%, var(--border)); }
.badge.ffmpeg { color: var(--text); }
.st { font: 600 11px/1.4 var(--mono); letter-spacing: .06em; }
.st.done { color: var(--ok); }
.st.error { color: var(--rec); }
.st.busy { color: var(--amber); }
.st.skip { color: var(--muted); }
.lufsbar { display: inline-block; width: 64px; height: 4px; background: var(--panel2); border-radius: 2px; margin-left: 8px; vertical-align: 2px; position: relative; overflow: hidden; }
.lufsbar i { position: absolute; left: 0; top: 0; bottom: 0; background: var(--amber); }

.summary { margin-top: 18px; }
.empty-hint { padding: 28px; text-align: center; color: var(--muted); font: 500 13px/1.8 var(--mono); letter-spacing: .03em; }

/* folder browser */
.filewrap { max-height: 62vh; overflow-y: auto; }
table.files thead th { position: sticky; top: 0; background: var(--panel); z-index: 2; }
.filter {
  background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  border-radius: 4px; padding: 9px 12px; font: 500 13px/1.2 var(--mono); min-width: 180px;
}
.filter:focus-visible { outline: 1px solid var(--amber); border-color: var(--amber); }
th.sel, td.sel { width: 30px; padding-right: 0 !important; }
th.fold-toggle, td.fold-toggle { width: 22px; color: var(--amber); font: 600 11px/1 var(--mono); padding-right: 0 !important; }
table.files input[type="checkbox"] { accent-color: var(--amber); width: 14px; height: 14px; cursor: pointer; }
tr.folder { cursor: pointer; background: var(--panel2); }
tr.folder:hover { background: #182029; }
tr.folder .fold-name b { color: var(--text); font-weight: 600; letter-spacing: .02em; }
tr.file { cursor: pointer; }
tr.file:hover { background: rgba(232, 163, 61, .05); }
tr.file.previewing { background: rgba(232, 163, 61, .1); box-shadow: inset 2px 0 0 var(--amber); }
tr.file .name { padding-left: 18px !important; }
table.files td .st { display: inline-block; margin-left: 8px; }

/* preview drawer */
body.preview-open { padding-bottom: 210px; }
.preview {
  display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
  background: var(--panel); border-top: 2px solid var(--amber);
  box-shadow: 0 -12px 32px rgba(0, 0, 0, .45);
  padding: 12px 0 calc(12px + env(safe-area-inset-bottom));
}
.preview.open { display: block; }
.pv-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 10px; }
.pv-name { font: 600 13px/1.4 var(--mono); color: var(--text); letter-spacing: .03em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 46%; }
.pv-stats { display: flex; gap: 12px; align-items: baseline; flex-wrap: wrap; font: 500 12px/1.4 var(--mono); color: var(--muted); }
.pv-stats b { color: var(--amber); }
.pv-stat.warn { color: var(--rec); }
.pv-close {
  margin-left: auto; background: none; border: 0; color: var(--muted); cursor: pointer;
  font: 400 22px/1 var(--mono); padding: 0 4px;
}
.pv-close:hover { color: var(--text); }
.pv-canvas { display: block; width: 100%; height: 76px; border: 1px solid var(--border); border-radius: 4px; cursor: crosshair; }
.pv-controls { display: flex; align-items: center; gap: 14px; margin-top: 10px; }
.pv-ab { display: inline-flex; border: 1px solid var(--border); border-radius: 4px; overflow: hidden; }
.pv-chip {
  background: var(--panel2); color: var(--muted); border: 0; cursor: pointer;
  font: 600 11px/1 var(--mono); letter-spacing: .08em; padding: 10px 14px;
}
.pv-chip.active { background: var(--amber); color: var(--amber-ink); }
.pv-note { font: 500 11.5px/1.4 var(--mono); color: var(--muted); overflow: hidden; text-overflow: ellipsis; }
.pv-time { margin-left: auto; font: 500 12px/1 var(--mono); color: var(--text); font-variant-numeric: tabular-nums; }

/* "?" help bubbles on settings */
.help {
  display: inline-flex; align-items: center; justify-content: center;
  width: 14px; height: 14px; margin-left: 6px; vertical-align: 1px;
  border: 1px solid var(--border); border-radius: 50%;
  color: var(--muted); font: 600 9px/1 var(--mono); cursor: help; position: relative;
}
.help:hover, .help:focus-visible { color: var(--amber); border-color: var(--amber); outline: none; }
.settings .lbl { display: inline-block; }
.help::after {
  content: attr(data-tip); display: none; position: absolute; top: 20px; left: 50%;
  transform: translateX(-40%); width: 250px; max-width: min(260px, 78vw);
  background: var(--panel2); border: 1px solid var(--border); border-radius: 5px;
  padding: 10px 12px; font: 400 11.5px/1.55 var(--sans); letter-spacing: 0; text-transform: none;
  color: var(--text); z-index: 30; box-shadow: 0 8px 20px rgba(0, 0, 0, .45); white-space: normal;
}
.help:hover::after, .help:focus-visible::after { display: block; }

/* ---------------- mobile ---------------- */
@media (max-width: 680px) {
  .wrap { padding: 0 16px; }
  nav { flex-wrap: wrap; row-gap: 10px; }
  nav .lang { margin-left: auto; }
  nav .btn { white-space: nowrap; }
}
@media (max-width: 640px) {
  /* OSD halves stack instead of interleaving */
  .osd { flex-direction: column; align-items: flex-start; gap: 9px; }
  /* ghost links drop below their button as one piece */
  .ghost { display: inline-block; white-space: nowrap; margin: 14px 0 0; }
  /* toolbar: status gets its own full line, filter stretches */
  .toolbar .status { flex-basis: 100%; text-align: left; margin-left: 0; }
  .filter { flex: 1; min-width: 120px; }
  /* table: drop the reference columns (Fmt, Dur, True pk) so File / LUFS /
     Gain / Status fit without side-scrolling; folder rows have no 4th cell */
  table.files th:nth-child(4), table.files td:nth-child(4),
  table.files th:nth-child(5), table.files td:nth-child(5),
  table.files th:nth-child(7), table.files td:nth-child(7) { display: none; }
  table.files th, table.files td { padding: 9px 8px; }
  table.files td.name { max-width: 34vw; }
  tr.file .name { padding-left: 12px !important; }
  .lufsbar { display: none; }
  /* preview drawer: compact, wrapping controls */
  .preview { padding: 10px 0 calc(10px + env(safe-area-inset-bottom)); }
  .pv-head { flex-wrap: wrap; row-gap: 4px; }
  .pv-name { max-width: 100%; }
  .pv-canvas { height: 56px; }
  .pv-controls { flex-wrap: wrap; gap: 10px; }
  .pv-note { order: 4; flex-basis: 100%; }
  body.preview-open { padding-bottom: 260px; }
}
/* comfortable touch targets for the help bubbles */
@media (pointer: coarse) {
  .help { width: 20px; height: 20px; font-size: 11px; }
}