:root {
  --bg: #0f1216;
  --card: #171b21;
  --line: #262c35;
  --text: #e8ecf1;
  --muted: #93a0b0;
  --accent: #4c9aff;
  --a: #3ecf8e; --b: #f2c14e; --c: #f28c4e; --reject: #e5484d; --review: #8b93a1;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f7fa; --card: #ffffff; --line: #e2e7ee;
    --text: #16202c; --muted: #5d6b7c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 60px; }

.topbar {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 20px; border-bottom: 1px solid var(--line); background: var(--card);
}
.brand { font-weight: 700; color: var(--text); text-decoration: none; font-size: 17px; }
.brand-sub { color: var(--muted); font-size: 13px; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 20px; margin-bottom: 18px;
}
.card.warn { border-color: #7a5b1e; background: color-mix(in srgb, var(--card) 88%, #f2c14e); }
h1 { font-size: 21px; margin: 0 0 6px; }
h2 { font-size: 16px; margin: 0 0 10px; }
h3 { font-size: 13px; margin: 18px 0 6px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
code { background: rgba(127,127,127,.16); padding: 1px 5px; border-radius: 4px; font-size: 12.5px; }

.drop {
  display: block; border: 2px dashed var(--line); border-radius: 10px;
  padding: 34px; text-align: center; color: var(--muted); cursor: pointer;
  transition: border-color .15s, color .15s;
}
.drop:hover, .drop.over { border-color: var(--accent); color: var(--text); }
button, .btn {
  background: var(--accent); color: #fff; border: 0; border-radius: 8px;
  padding: 9px 16px; font-size: 14px; font-weight: 600; cursor: pointer;
  text-decoration: none; display: inline-block; margin-top: 12px;
}
button:disabled { opacity: .45; cursor: not-allowed; }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }

.bar { height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; margin-top: 14px; }
.bar-fill { height: 100%; width: 0; background: var(--accent); transition: width .3s; }
.error { color: var(--reject); font-weight: 600; }

.stat-row { display: flex; gap: 12px; flex-wrap: wrap; }
.stat {
  flex: 1 1 130px; background: rgba(127,127,127,.08);
  border: 1px solid var(--line); border-radius: 10px; padding: 12px;
}
.stat-num { font-size: 26px; font-weight: 700; line-height: 1.1; }
.stat-lab { font-size: 12.5px; color: var(--muted); margin-top: 4px; }
.stat.grade-A { border-left: 4px solid var(--a); }
.stat.grade-B { border-left: 4px solid var(--b); }
.stat.grade-C { border-left: 4px solid var(--c); }
.stat.grade-REJECT { border-left: 4px solid var(--reject); }
.stat.grade-review { border-left: 4px solid var(--review); }

table.grid { width: 100%; border-collapse: collapse; font-size: 12.5px; display: block; overflow-x: auto; }
table.grid th, table.grid td {
  border: 1px solid var(--line); padding: 6px 8px; text-align: center; white-space: nowrap;
}
table.grid th { color: var(--muted); font-weight: 600; }
td.rowlab { text-align: left; font-weight: 700; }
td.zero { color: var(--muted); background: rgba(127,127,127,.06); }
td.bad { color: #fff; background: color-mix(in srgb, var(--reject) 55%, transparent); }
td.ok { background: color-mix(in srgb, var(--a) 22%, transparent); }

.runs { list-style: none; padding: 0; margin: 0; }
.runs li { padding: 6px 0; border-bottom: 1px solid var(--line); }
.runs a { color: var(--accent); text-decoration: none; }

.birds { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.bird { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: rgba(127,127,127,.05); }
.bird img { width: 100%; height: 190px; object-fit: cover; display: block; background: #000; }
.bird-body { padding: 10px 12px 12px; }
.bird-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }
.pill { font-size: 11.5px; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--review); color: #fff; }
.pill.grade-A { background: var(--a); color: #06281a; }
.pill.grade-B { background: var(--b); color: #332600; }
.pill.grade-C { background: var(--c); color: #331700; }
.pill.grade-REJECT { background: var(--reject); }
.pill.reviewed { background: var(--accent); }

form.review { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
form.review select { background: var(--card); color: var(--text); border: 1px solid var(--line); border-radius: 6px; padding: 5px 8px; }
form.review button { margin-top: 0; padding: 5px 12px; font-size: 13px; }
form.review details { font-size: 12.5px; color: var(--muted); }
.checks { display: grid; gap: 3px; padding: 8px 0; }
.checks label { display: flex; align-items: center; gap: 6px; color: var(--text); font-size: 12.5px; }
.saved { color: var(--a); font-size: 12px; font-weight: 600; }

video.annotated { width: 100%; max-height: 70vh; border-radius: 10px; background: #000; display: block; }
.key { display: inline-block; padding: 1px 8px; border-radius: 4px; margin: 0 2px; font-weight: 700; color: #10160f; }
.key-A { background: rgb(60,200,80); }
.key-B { background: rgb(240,200,60); }
.key-C { background: rgb(240,130,40); }
.key-REJECT { background: rgb(230,60,60); color: #fff; }
.key-review { background: rgb(170,170,170); }

.foot { max-width: 1100px; margin: 0 auto; padding: 0 16px 40px; color: var(--muted); font-size: 12.5px; }

.mode-row { display: flex; flex-direction: column; gap: 6px; margin: 12px 0 4px; }
.mode { font-size: 13px; color: var(--muted); cursor: pointer; }
.mode b { color: var(--text); }

/* --- customer-facing report polish --- */
.pipeline { display: flex; gap: 8px; flex-wrap: wrap; margin: 4px 0 14px; }
.chip { font-size: 12px; background: rgba(127,127,127,.10); border: 1px solid var(--line);
  border-radius: 999px; padding: 4px 12px; color: var(--muted); }
.chip b { color: var(--text); margin-right: 5px; }
.tag { display: inline-block; font-size: 11.5px; padding: 2px 8px; border-radius: 6px;
  background: rgba(127,127,127,.14); margin: 2px 3px 0 0; }
.tag-bad { background: color-mix(in srgb, var(--c) 30%, transparent); color: var(--text); }
.bird-defects { margin: 4px 0 2px; }
.bird-note { font-size: 12.5px; color: var(--text); font-style: italic; margin: 4px 0 6px;
  line-height: 1.4; }
details.correct { margin-top: 8px; }
details.correct > summary { font-size: 12px; color: var(--muted); cursor: pointer; list-style: none; }
details.correct > summary::before { content: "✎ "; }
details.correct .review { display: block; margin-top: 8px; }
details.correct select { background: var(--card); color: var(--text); border: 1px solid var(--line);
  border-radius: 6px; padding: 5px 8px; width: 100%; }

details.diag { padding: 14px 20px; }
details.diag > summary { font-size: 12.5px; color: var(--muted); cursor: pointer; }
details.diag h3 { margin-top: 16px; }

/* --- Packet DCS branding --- */
.brand { display: inline-flex; align-items: center; }
.brand-logo { height: 30px; width: auto; display: block; }
.brand-logo-light { display: none; }              /* dark theme default: show white logo */
.brand-logo-dark { display: block; }
@media (prefers-color-scheme: light) {
  .brand-logo-dark { display: none; }
  .brand-logo-light { display: block; }           /* light theme: show black logo */
}

/* --- top navigation ------------------------------------------------- */
.topnav{margin-left:auto;display:flex;gap:1.5rem;align-items:center}
.topnav a{color:inherit;opacity:.72;text-decoration:none;font-size:.92rem;
  padding:.35rem 0;border-bottom:2px solid transparent}
.topnav a:hover{opacity:1;border-bottom-color:#e00}

/* --- demo promo card ------------------------------------------------ */
.promo{display:flex;gap:1.6rem;align-items:center;flex-wrap:wrap}
.promo-body{flex:1 1 22rem;min-width:0}
.promo-body h2{margin-top:0}
.promo-thumb{flex:0 0 20rem;max-width:100%;display:block;border-radius:10px;
  overflow:hidden;line-height:0;box-shadow:0 6px 24px rgba(12,18,28,.18)}
.promo-thumb img{width:100%;height:auto;display:block;transition:transform .25s ease}
.promo-thumb:hover img{transform:scale(1.03)}

/* --- demo page ------------------------------------------------------ */
.demo-video{width:100%;border-radius:10px;display:block;background:#000}
.demo-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(9rem,1fr));
  gap:.9rem;margin:1rem 0 .4rem}
.demo-stat{background:rgba(127,127,127,.09);border-radius:9px;padding:.7rem .85rem}
.demo-stat b{display:block;font-size:1.5rem;line-height:1.15;color:#e00}
.demo-stat span{font-size:.78rem;opacity:.7}
.caveat{border-left:3px solid #e00;padding:.7rem 0 .7rem .9rem;margin-top:1rem;
  font-size:.9rem;opacity:.85}