:root {
  --bg: #0b0e13;
  --panel: #121822;
  --line: #243041;
  --text: #e8eef7;
  --muted: #8b98ab;
  --accent: #6ea8ff;
  --accent2: #8b7cff;
  --ok: #3dd68c;
  --warn: #f0b429;
  --danger: #ff7b7b;
  --chip: #1a2230;
  --sans: "Segoe UI", system-ui, sans-serif;
  --mono: "Cascadia Code", ui-monospace, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); font-family: var(--sans); }
body {
  background:
    radial-gradient(900px 400px at 0% 0%, #172338 0%, transparent 50%),
    radial-gradient(700px 360px at 100% 0%, #1a1530 0%, transparent 45%),
    var(--bg);
}
.top {
  position: sticky; top: 0; z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: .75rem;
  align-items: center;
  padding: .7rem .9rem;
  border-bottom: 1px solid var(--line);
  background: rgba(11,14,19,.9);
  backdrop-filter: blur(10px);
}
.brand { display: flex; gap: .6rem; align-items: center; }
.brand .mark {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #061018; font-weight: 800;
}
.brand strong { display: block; font-size: .95rem; }
.brand small { color: var(--muted); font-size: .72rem; }
.tabs { display: flex; flex-wrap: wrap; gap: .35rem; justify-content: center; }
.tabs button, .auth button, .btn {
  border: 1px solid var(--line); background: var(--panel); color: var(--text);
  border-radius: 9px; padding: .4rem .65rem; font-weight: 600; cursor: pointer;
}
.tabs button.active { border-color: #3d5f96; background: #152238; color: #d7e8ff; }
.auth {
  display: flex; gap: .4rem; align-items: center;
  background: #0e141d; border: 1px solid #3d5f96; border-radius: 10px;
  padding: .35rem .45rem;
}
.auth-label {
  font-size: 11px; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; color: var(--accent); padding-left: .2rem;
}
.auth input {
  width: 180px; max-width: 36vw;
  background: #0a0e14; border: 1px solid var(--line); color: var(--text);
  border-radius: 8px; padding: .4rem .5rem; font-size: 12px;
}
.auth button { background: #1a3a66; border-color: #3d5f96; }
.google-btn {
  text-decoration: none; display: inline-flex; align-items: center;
  background: #1f6feb !important; border-color: #388bfd !important; color: #fff !important;
  font-size: 12px; white-space: nowrap;
}
.login-card .google-btn { font-size: 14px; padding: .55rem .9rem; }
.login-card input {
  background: #0e131b; border: 1px solid var(--line); color: var(--text);
  border-radius: 10px; padding: .7rem .75rem; font: inherit;
}
.login-card code { font-size: 12px; color: #cfe0ff; }
main { max-width: 980px; margin: 0 auto; padding: 1rem .9rem 3rem; }
.foot {
  border-top: 1px solid var(--line); color: var(--muted); font-size: 12px;
  padding: .7rem 1rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}
.muted { color: var(--muted); }
.err { color: var(--danger); background: #2a1515; border: 1px solid #5a2a2a; padding: .75rem 1rem; border-radius: 10px; }
.grid { display: grid; gap: .75rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
@media (max-width: 800px) {
  .top { grid-template-columns: 1fr; }
  .grid2 { grid-template-columns: 1fr; }
  .auth input { width: 100%; max-width: none; }
}
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 1rem;
}
.card h2, .card h3 { margin: 0 0 .45rem; }
.card p { margin: .35rem 0; line-height: 1.5; }
.chips { display: flex; flex-wrap: wrap; gap: .35rem; margin: .5rem 0; }
.chip {
  background: var(--chip); border: 1px solid var(--line); border-radius: 999px;
  padding: .2rem .55rem; font-size: 12px; color: #c9d7ee; cursor: pointer;
}
.chip.ok { color: #b7f0d2; border-color: #2a5a3d; }
.list { list-style: none; padding: 0; margin: 0; }
.list li {
  border-top: 1px solid var(--line); padding: .65rem 0; cursor: pointer;
}
.list li:first-child { border-top: 0; }
.list li:hover { color: #fff; }
.row { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; }
.badge {
  font-size: 11px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--warn); background: #2a230f; border: 1px solid #5a4a20;
  border-radius: 6px; padding: .15rem .4rem;
}
.badge.course { color: #d2c6ff; background: #1b1630; border-color: #4a3a7a; }
.badge.episode { color: #9fd4ff; background: #152238; border-color: #2a4d72; }
input[type=search], textarea {
  width: 100%; background: #0e131b; border: 1px solid var(--line); color: var(--text);
  border-radius: 10px; padding: .65rem .75rem; font: inherit;
}
textarea { min-height: 90px; resize: vertical; }
.timeline { display: grid; gap: .4rem; margin: .75rem 0; }
.tl {
  display: grid; grid-template-columns: 72px 1fr; gap: .6rem;
  padding: .55rem .65rem; border: 1px solid var(--line); border-radius: 10px;
  background: #0e141d; cursor: pointer;
}
.tl:hover { border-color: #3d5f96; }
.tl time { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.quote {
  border-left: 3px solid var(--accent2); padding: .35rem .7rem; margin: .4rem 0;
  color: #d5def0; background: rgba(0,0,0,.2); border-radius: 0 8px 8px 0; font-size: .95rem;
}
pre.tx {
  white-space: pre-wrap; background: #0a0e14; border: 1px solid var(--line);
  border-radius: 10px; padding: .85rem; font-size: 13px; line-height: 1.45; color: #c5d3ea;
  max-height: 320px; overflow: auto;
}
.actions { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .6rem; }
h1 { font-size: 1.35rem; margin: 0 0 .75rem; }
.hero { margin-bottom: .5rem; color: var(--muted); }