:root {
  --ground: #E9EEEC;
  --paper: #F8FAF9;
  --ink: #15221F;
  --muted: #55655F;
  --line: #CAD5D1;
  --accent: #0F7A5B;
  --accent-ink: #fff;
  --brass: #A87414;
  --rec: #C23B22;
  --warn-bg: #FBEFD6;
  --mark: #F6DB86;
  --strata-lo: 190,205,199;
  --strata-hi: 11,98,74;
  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ground: #0C1311;
    --paper: #131C19;
    --ink: #E2ECE8;
    --muted: #93A6A0;
    --line: #26352F;
    --accent: #3CCB9B;
    --accent-ink: #06231A;
    --brass: #E0B04A;
    --rec: #FF7157;
    --warn-bg: #2B2410;
    --mark: #6B5612;
    --strata-lo: 38,54,48;
    --strata-hi: 60,203,155;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--ground); color: var(--ink);
  font: 16px/1.5 var(--sans);
  padding-bottom: env(safe-area-inset-bottom);
}
a { color: var(--accent); }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
[hidden] { display: none !important; }

.top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px max(16px, env(safe-area-inset-left)); gap: 12px;
  border-bottom: 1px solid var(--line); background: var(--paper);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--ink); font: 700 1.2rem var(--serif); }
.top nav { display: flex; gap: 4px; }
.top nav a {
  text-decoration: none; color: var(--muted); padding: 8px 12px; border-radius: 8px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 6px;
}
.top nav a[aria-current="page"] { color: var(--ink); background: var(--ground); }
.top .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--rec); animation: pulse 1.4s infinite; }
@keyframes pulse { 50% { opacity: .25; } }

main { max-width: 760px; margin: 0 auto; padding: 20px 16px 80px; outline: none; }
h1, h2, h3 { font-family: var(--serif); line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: 1.7rem; } h2 { font-size: 1.25rem; } h3 { font-size: 1.05rem; }
p { margin: 0 0 .8em; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }

.panel { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.panel > :last-child { margin-bottom: 0; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.stack > * + * { margin-top: 12px; }

label.f { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 4px; }
input[type=text], input[type=search], input[type=number], select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--ground);
  min-height: 44px;
}
textarea { min-height: 96px; resize: vertical; }
input[type=range] { width: 100%; accent-color: var(--accent); min-height: 32px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 8px 16px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--paper); cursor: pointer; font-weight: 600; text-decoration: none; color: var(--ink);
}
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.danger { color: var(--rec); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn.sm { min-height: 36px; padding: 4px 12px; font-size: .9rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* Botón de grabación */
.rec-btn {
  width: 92px; height: 92px; border-radius: 50%; border: 4px solid var(--ink); background: var(--paper);
  display: grid; place-items: center; cursor: pointer; padding: 0; flex: none;
}
.rec-btn i { width: 54px; height: 54px; border-radius: 50%; background: var(--rec); display: block; transition: border-radius .15s, transform .15s; }
.rec-btn.on i { border-radius: 10px; transform: scale(.6); }
.rec-btn:disabled { opacity: .5; }

.timer { font: 700 2.6rem/1 var(--serif); font-variant-numeric: tabular-nums; letter-spacing: -.01em; }

/* Columna estratigráfica (nivel de audio) */
.strata { position: relative; height: 84px; background: var(--ground); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; touch-action: none; }
.strata canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.strata .tick { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--brass); pointer-events: none; }
.strata .tick.slide { background: var(--accent); }
.strata .tick.interrupt { background: var(--rec); width: 3px; }
.strata .head { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--ink); pointer-events: none; box-shadow: 0 0 0 1px var(--paper); }

.meter { height: 10px; border-radius: 5px; background: var(--ground); border: 1px solid var(--line); position: relative; overflow: hidden; }
.meter .bar { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--accent); }
.meter .bar.hot { background: var(--rec); }
.meter .hold { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--ink); left: 0; }

.chip { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 99px; font-size: .8rem; font-weight: 600; background: var(--ground); border: 1px solid var(--line); color: var(--muted); }
.chip.ok { color: var(--accent); border-color: var(--accent); }
.chip.warn { color: var(--brass); border-color: var(--brass); }
.chip.bad { color: var(--rec); border-color: var(--rec); }

.alert { padding: 10px 14px; border-radius: 8px; background: var(--warn-bg); border-left: 4px solid var(--brass); margin: 10px 0; font-size: .95rem; }
.alert.bad { border-color: var(--rec); }

details.panel > summary { cursor: pointer; font-weight: 700; font-family: var(--serif); font-size: 1.05rem; min-height: 32px; }
details[open].panel > summary { margin-bottom: 12px; }

.opt { display: flex; gap: 10px; padding: 10px; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; align-items: flex-start; }
.opt:has(input:checked) { border-color: var(--accent); background: var(--ground); }
.opt input { margin-top: 5px; accent-color: var(--accent); }
.opt b { display: block; }
.opt.disabled { opacity: .5; cursor: not-allowed; }

/* Biblioteca */
.card { display: block; width: 100%; text-align: left; background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; text-decoration: none; color: var(--ink); cursor: pointer; }
.card:hover { border-color: var(--muted); }
.card h3 { margin: 0 0 4px; }
.list { display: grid; gap: 10px; }
.hit { padding: 8px 0; border-top: 1px solid var(--line); }
.hit mark, .seg mark { background: var(--mark); color: inherit; border-radius: 2px; padding: 0 1px; }

/* Detalle */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 18px 0 14px; overflow-x: auto; }
.tabs button { background: none; border: none; border-bottom: 3px solid transparent; padding: 10px 14px; font-weight: 700; cursor: pointer; color: var(--muted); white-space: nowrap; min-height: 44px; }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }

.player { position: sticky; top: 56px; z-index: 10; padding: 10px 12px; box-shadow: 0 6px 14px -10px #0007; }
.player .strata { height: 56px; }
.player .ctrls { display: flex; gap: 8px; align-items: center; flex-wrap: nowrap; margin-top: 8px; }
.player .ctrls .btn { padding: 4px 10px; }
.player .popts { margin-top: 6px; }
.player .popts summary { cursor: pointer; min-height: 28px; }
.strata .empty { position: absolute; inset: 0; display: grid; place-items: center; color: var(--muted); font-size: .85rem; padding: 0 12px; text-align: center; pointer-events: none; }
.player .time { font-variant-numeric: tabular-nums; font-weight: 600; margin-left: auto; }

.tbar { display: flex; gap: 8px; margin-bottom: 12px; align-items: center; }
.tbar input { flex: 1; }
.transcript { font-family: var(--serif); font-size: 1.08rem; line-height: 1.7; max-width: 68ch; }
.seg { display: grid; grid-template-columns: 4.2em 1fr; gap: 8px; padding: 4px 6px; border-radius: 6px; margin-left: -6px; }
.seg.now { background: color-mix(in srgb, var(--accent) 14%, transparent); }
.seg .ts { font: 600 .8rem var(--sans); color: var(--muted); background: none; border: none; text-align: left; cursor: pointer; padding: 6px 0; min-height: 32px; font-variant-numeric: tabular-nums; }
.seg .ts:hover { color: var(--accent); }
.seg .tx { outline: none; white-space: pre-wrap; }
.seg .tx:focus { background: var(--ground); border-radius: 4px; }
.seg.hitnow .tx { box-shadow: -3px 0 0 var(--brass); padding-left: 6px; }
.mk { font: 600 .9rem var(--sans); margin: 10px 0; padding: 8px 12px; border-radius: 8px; display: flex; gap: 10px; align-items: center; justify-content: space-between; }
.mk.star { background: var(--warn-bg); color: var(--brass); }
.mk.interrupt { background: color-mix(in srgb, var(--rec) 12%, transparent); color: var(--rec); }
.mk.resume { color: var(--muted); font-weight: 500; padding: 0 12px; margin: 0 0 8px; }
.mk.slide { display: block; background: var(--paper); border: 1px solid var(--line); }
.mk.slide img { display: block; max-width: 100%; width: 360px; border: 1px solid var(--line); border-radius: 4px; margin-top: 8px; cursor: zoom-in; }
.mk .x { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 1.2rem; min-width: 32px; min-height: 32px; }

.slides-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.thumb { border: 1px solid var(--line); border-radius: 6px; background: var(--paper); padding: 4px; cursor: pointer; text-align: left; }
.thumb img { width: 100%; display: block; border-radius: 3px; }
.thumb.sel { outline: 3px solid var(--accent); }
.thumb span { font-size: .75rem; color: var(--muted); display: block; padding-top: 3px; }
.viewer img { width: 100%; display: block; border: 1px solid var(--line); border-radius: 6px; background: #fff; }

.progress { height: 12px; background: var(--ground); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.progress > div { height: 100%; background: var(--accent); width: 0; transition: width .3s; }

#toast { position: fixed; left: 50%; bottom: calc(18px + env(safe-area-inset-bottom)); transform: translateX(-50%); z-index: 50; display: grid; gap: 8px; width: min(92vw, 460px); pointer-events: none; }
#toast div { background: var(--ink); color: var(--ground); padding: 10px 14px; border-radius: 8px; box-shadow: 0 6px 24px #0004; font-weight: 500; }
dialog { border: 1px solid var(--line); border-radius: 12px; background: var(--paper); color: var(--ink); padding: 20px; max-width: min(92vw, 520px); }
dialog::backdrop { background: #0008; }
dialog img.big { max-width: 100%; display: block; }

@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }
@media (max-width: 520px) {
  .timer { font-size: 2.1rem; }
  .seg { grid-template-columns: 3.6em 1fr; }
  .transcript { font-size: 1.02rem; }
}