:root {
  --ink: #0f2a4a;
  --muted: #6b7f95;
  --line: #dde7ef;
  --surface: #f3f8fb;
  --card: #fff;
  --accent: #1594b0;
  --accent-dark: #0d6a93;
  --danger: #c43d3d;
  --ok: #1f9d6b;
  color-scheme: light;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--surface);
}
h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 18px; margin: 0 0 12px; }
h3 { font-size: 15px; margin: 0 0 8px; }
code { background: #e9f1f6; padding: 1px 5px; border-radius: 4px; }

.top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 12px 24px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 2;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.brand svg { width: 34px; height: 24px; fill: none; stroke: var(--accent); stroke-width: 2; }
.brand small { color: var(--muted); font-weight: 400; }
nav { display: flex; gap: 6px; align-items: center; }

main { max-width: 1080px; margin: 0 auto; padding: 24px 16px 80px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px; margin-bottom: 16px; }
.narrow { max-width: 420px; margin: 60px auto; }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 12px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=search], textarea, select {
  display: block; width: 100%; margin-top: 4px; padding: 10px 12px;
  font: inherit; color: var(--ink); background: var(--surface);
  border: 1px solid var(--line); border-radius: 10px;
}
textarea { min-height: 90px; resize: vertical; }
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.check { display: flex; align-items: center; gap: 8px; color: var(--ink); font-size: 14px; }

button { font: inherit; cursor: pointer; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--ink); padding: 8px 14px; }
button:disabled { opacity: .5; cursor: default; }
button.primary { background: linear-gradient(90deg, var(--accent), var(--accent-dark)); color: #fff; border: 0; padding: 10px 18px; font-weight: 600; }
button.danger { color: var(--danger); border-color: #f0d3d3; }
button.link { border: 0; background: none; color: var(--accent-dark); padding: 6px 8px; }
button.tab { border: 0; background: none; color: var(--muted); }
button.tab.active { background: var(--surface); color: var(--ink); font-weight: 600; }

.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.row.spread { justify-content: space-between; }
.grid { display: grid; gap: 0 16px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.muted { color: var(--muted); }
.hint { color: var(--muted); font-size: 13px; }
.error { color: var(--danger); min-height: 1em; margin: 4px 0 8px; }
.badge { display: inline-block; font-size: 12px; padding: 2px 8px; border-radius: 99px; background: #e9f1f6; color: var(--muted); }
.badge.on { background: #dcf5ea; color: var(--ok); }

.list { display: grid; gap: 10px; }
.item { display: flex; gap: 14px; align-items: center; padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
.item .grow { flex: 1; min-width: 0; }
.item .title { font-weight: 600; }
.thumb { width: 96px; height: 56px; border-radius: 8px; object-fit: cover; background: #dbe8f0; flex: none; }
.cover-preview { width: 100%; max-width: 360px; aspect-ratio: 16/9; object-fit: cover; border-radius: 12px; background: #dbe8f0; display: block; margin-bottom: 8px; }

.highlight { display: grid; grid-template-columns: 130px 1fr 1fr auto; gap: 8px; align-items: end; margin-bottom: 8px; }
.highlight label { margin: 0; }

.upload { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.upload progress { width: 200px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; color: var(--muted); font-weight: 500; }

.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 10px; }

@media (max-width: 640px) {
  .highlight { grid-template-columns: 1fr; }
  .top { padding: 12px 16px; }
}