:root {
  --ink: #0b0d12;
  --text: #3d4455;
  --muted: #6b7280;
  --bg: #fff;
  --tint: #f6f7fb;
  --line: #e6e8ef;
  --accent: #6366f1;
  --accent-2: #a855f7;
  --ok: #10b981;
  --err: #e11d48;
  --warn: #d97706;
  --r: 12px;
  --wrap: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 400 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { color: var(--ink); line-height: 1.2; margin: 0 0 .4rem; }
h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); letter-spacing: -.02em; }
h3 { font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
h4 { font-size: .98rem; }
code { font: 500 .86em/1 ui-monospace, Menlo, monospace; background: var(--tint); padding: .15em .4em; border-radius: 6px; }
.muted { color: var(--muted); }
.tiny { font-size: .84rem; }
.err { color: var(--err); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

/* header */
.top { border-bottom: 1px solid var(--line); background: rgba(255,255,255,.9); backdrop-filter: saturate(180%) blur(12px); position: sticky; top: 0; z-index: 20; }
.top-in { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 12px; }
.top-right { display: flex; align-items: center; gap: 10px; }
.who { font-size: .84rem; color: var(--muted); }
.brand { display: flex; align-items: center; gap: 8px; color: var(--ink); text-decoration: none; font-weight: 600; }
.brand b { color: var(--accent); }
.brand svg { width: 21px; height: 21px; fill: none; stroke: var(--accent); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

/* hero */
.hero { padding: 44px 0 26px; }
.eyebrow { margin: 0 0 8px; font-size: .76rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
.lede { margin: 0; max-width: 62ch; color: var(--muted); }
.stats { display: flex; gap: 30px; margin: 22px 0 14px; flex-wrap: wrap; }
.stat b { display: block; font-size: 1.5rem; color: var(--ink); line-height: 1.1; letter-spacing: -.02em; }
.stat span { font-size: .82rem; color: var(--muted); }
progress { display: block; width: 100%; max-width: 420px; height: 6px; border: 0; border-radius: 99px; overflow: hidden; background: var(--tint); appearance: none; }
progress::-webkit-progress-bar { background: var(--tint); border-radius: 99px; }
progress::-webkit-progress-value { background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 99px; }
progress::-moz-progress-bar { background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 99px; }
#s-note { margin: 8px 0 0; }

/* layout */
.layout { display: grid; grid-template-columns: 230px 1fr; gap: 32px; align-items: start; }
/* Sin min-width:0 los items de grid conservan su ancho intrinseco y desbordan en movil. */
.side, .content { min-width: 0; }
.side { position: sticky; top: 76px; }
.tree { display: flex; flex-direction: column; gap: 1px; }
.tree button { display: flex; justify-content: space-between; gap: 8px; width: 100%; text-align: left; padding: 8px 11px; font: inherit; font-size: .9rem; color: var(--text); background: none; border: 0; border-radius: 9px; cursor: pointer; }
.tree button:hover { background: var(--tint); }
.tree button[aria-current="true"] { background: var(--tint); color: var(--accent); font-weight: 600; }
.tree .n { color: var(--muted); font-size: .8rem; font-weight: 400; }

/* toolbar */
.toolbar { display: flex; gap: 9px; margin-bottom: 12px; }
select, input[type="text"], input[type="password"], input[type="search"], textarea {
  font: inherit; font-size: .94rem; color: var(--ink); background: #fff;
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(99,102,241,.15); }
#search { flex: 1; min-width: 0; }
#sort { flex: none; max-width: 46%; }
select { cursor: pointer; }
textarea { width: 100%; font: 500 .84rem/1.6 ui-monospace, Menlo, monospace; resize: vertical; }

.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.chip { padding: 4px 11px; font-size: .82rem; font-weight: 500; color: var(--text); background: var(--tint); border: 1px solid transparent; border-radius: 99px; cursor: pointer; }
.chip:hover { border-color: var(--line); }
.chip[aria-pressed="true"] { color: var(--accent); background: #fff; border-color: var(--accent); }
.count { color: var(--muted); font-size: .85rem; margin: 0 0 10px; }

/* file cards */
.list { display: flex; flex-direction: column; gap: 7px; }
.item { display: flex; align-items: center; gap: 13px; padding: 13px 15px; border: 1px solid var(--line); border-radius: var(--r); background: #fff; }
.item:hover { border-color: #cfd4e4; }
.item.done { background: #fbfffd; }
.ext { flex: none; width: 42px; height: 42px; display: grid; place-items: center; font-size: .66rem; font-weight: 800; letter-spacing: .02em; color: #fff; border-radius: 10px; text-transform: uppercase; background: #64748b; }
/* Colores por tipo. Clases y no estilos inline: la CSP prohibe style-src inline. */
.x-pdf{background:#dc2626}.x-zip{background:#a16207}.x-rar{background:#a16207}.x-7z{background:#a16207}
.x-mp4{background:#7c3aed}.x-mov{background:#7c3aed}.x-mp3{background:#7c3aed}.x-webm{background:#7c3aed}
.x-ipynb{background:#ea580c}.x-py{background:#2563eb}.x-js{background:#ca8a04}.x-ts{background:#ca8a04}
.x-html{background:#ea580c}.x-css{background:#ca8a04}
.x-csv{background:#059669}.x-json{background:#059669}.x-xlsx{background:#059669}
.x-md{background:#475569}.x-txt{background:#475569}.x-srt{background:#475569}.x-vtt{background:#475569}
.x-png{background:#0d9488}.x-jpg{background:#0d9488}.x-jpeg{background:#0d9488}.x-svg{background:#0d9488}
.x-pptx{background:#d24726}.x-docx{background:#2563eb}.x-pdf-x{background:#dc2626}
.info { flex: 1; min-width: 0; }
.info .nm { color: var(--ink); font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.info .ds { font-size: .84rem; color: var(--muted); margin-top: 1px; }
.info .mt { font-size: .78rem; color: var(--muted); margin-top: 2px; }
.acts { display: flex; gap: 6px; flex: none; }
.check { width: 18px; height: 18px; accent-color: var(--ok); flex: none; }

.btn { padding: 9px 16px; font: inherit; font-size: .9rem; font-weight: 600; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; white-space: nowrap; text-decoration: none; display: inline-block; text-align: center; }
.btn:hover { border-color: #c9cede; }
.btn.primary { color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; }
.btn.sm { padding: 6px 12px; font-size: .83rem; }
.btn.danger { color: var(--err); }
.btn.danger:hover { background: #fff1f4; border-color: #fbc7d3; }

/* gate */
.card { background: var(--tint); border: 1px solid var(--line); border-radius: var(--r); padding: 22px; margin: 40px 0; }
.gate { max-width: 440px; }
.gate-form { display: flex; gap: 8px; margin-top: 12px; }
.sm-err { font-size: .88rem; margin: 10px 0 0; }

.empty { color: var(--muted); padding: 48px 0; text-align: center; }

/* admin */
.admin { margin: 44px 0 0; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.adm-head { display: flex; justify-content: space-between; align-items: center; width: 100%; padding: 15px 18px; font: inherit; font-weight: 600; color: var(--ink); background: var(--tint); border: 0; cursor: pointer; }
.adm-head .chev { transition: transform .2s; }
.adm-head[aria-expanded="true"] .chev { transform: rotate(180deg); }
.adm-body { padding: 20px 18px; border-top: 1px solid var(--line); }
.adm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-bottom: 26px; }
.drop { border: 1.5px dashed #c8cede; border-radius: var(--r); padding: 26px 16px; text-align: center; cursor: pointer; margin: 10px 0; }
.drop:hover, .drop.over { border-color: var(--accent); background: #f5f5ff; }
.drop p { margin: 0 0 3px; }
#up-folder { width: 100%; margin-bottom: 8px; }
.bar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-top: 10px; }
.log { list-style: none; margin: 12px 0 0; padding: 0; font-size: .84rem; }
.log li { padding: 4px 0; border-bottom: 1px solid var(--line); }
.log li.ok { color: var(--ok); }
.log li.no { color: var(--err); }
.diag { background: var(--ink); color: #cbd5e1; padding: 13px; border-radius: 10px; font: 500 .78rem/1.55 ui-monospace, Menlo, monospace; overflow-x: auto; margin: 10px 0 0; }
#cat-msg.ok { color: var(--ok); }
#cat-msg.no { color: var(--err); }

.foot { border-top: 1px solid var(--line); margin-top: 56px; padding: 22px 0; }
.foot p { color: var(--muted); font-size: .86rem; margin: 0; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; gap: 18px; }
  .side { position: static; }
  .tree { flex-direction: row; overflow-x: auto; padding-bottom: 4px; }
  .tree button { white-space: nowrap; width: auto; }
  .adm-grid { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 560px) {
  .gate-form { flex-direction: column; }
  .item { flex-wrap: wrap; }
  .info { flex-basis: 100%; }
  .stats { gap: 20px; }
  .acts { width: 100%; }
}