:root {
  --ink: #16202b; --mute: #5d6773; --rule: #e3e6ea; --bg: #f6f7f9; --card: #fff;
  --accent: #1f4e79; --accent-soft: #eaf1f8; --ok: #1b7a46; --ok-soft: #e8f5ee; --warn: #9a5b00;
  --radius: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif; color: var(--ink); background: var(--bg); }
a { color: var(--accent); }
.muted { color: var(--mute); }
.loading, .center { max-width: 560px; margin: 20vh auto; text-align: center; padding: 0 20px; }

/* header */
.top { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.96); backdrop-filter: blur(8px); border-bottom: 1px solid var(--rule); }
.top-inner { max-width: 1180px; margin: 0 auto; padding: 12px 20px; display: flex; gap: 20px; align-items: center; justify-content: space-between; }
.brand { display: flex; flex-direction: column; line-height: 1.25; }
.brand strong { font-size: 16px; }
.brand span { font-size: 13px; color: var(--mute); }
.meta { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; min-width: 0; }
.progress { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--mute); white-space: nowrap; }
.progress .bar { width: 140px; height: 6px; background: var(--rule); border-radius: 99px; overflow: hidden; }
.progress .fill { display: block; height: 100%; width: 0; background: var(--ok); transition: width .3s; }
.status { font-size: 12.5px; color: var(--ok); text-align: right; }
.status.saving { color: var(--mute); }
.status.offline { color: var(--warn); max-width: 420px; }

/* layout */
.layout { max-width: 1180px; margin: 0 auto; padding: 28px 20px 80px; display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 36px; }
.toc { position: sticky; top: 92px; align-self: start; display: flex; flex-direction: column; gap: 2px; max-height: calc(100vh - 110px); overflow: auto; }
.toc a { display: flex; justify-content: space-between; gap: 8px; padding: 7px 10px; border-radius: 8px; text-decoration: none; color: var(--ink); font-size: 14px; }
.toc a:hover { background: #fff; }
.toc .count { color: var(--mute); font-size: 12.5px; font-variant-numeric: tabular-nums; }
.toc a.complete .count { color: var(--ok); font-weight: 600; }
main { min-width: 0; }

.intro h1 { margin: 0 0 4px; font-size: 30px; letter-spacing: -.01em; }
.intro .sub { margin: 0 0 18px; color: var(--mute); font-size: 17px; }
.autosave { background: var(--ok-soft); border: 1px solid #cfe9da; border-radius: var(--radius); padding: 14px 16px; font-size: 15px; }
.how { margin: 14px 0 0; background: #fff; border: 1px solid var(--rule); border-radius: var(--radius); padding: 12px 16px; }
.how summary { cursor: pointer; font-weight: 600; }
.how ul { margin: 10px 0 2px; padding-left: 20px; color: var(--mute); font-size: 15px; }
.how li { margin: 6px 0; }

.sec { margin-top: 40px; }
.sec h2 { font-size: 21px; margin: 0 0 6px; }
.secnote { margin: 0 0 14px; color: var(--mute); font-style: italic; font-size: 15px; }

.q { background: var(--card); border: 1px solid var(--rule); border-left: 4px solid var(--rule); border-radius: var(--radius); padding: 18px 20px; margin: 14px 0; transition: border-color .2s; }
.q.answered { border-left-color: var(--ok); }
.q h3 { margin: 0 0 6px; font-size: 16px; font-weight: 600; display: flex; gap: 10px; }
.q .num { flex: none; min-width: 26px; height: 26px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-size: 13px; display: inline-flex; align-items: center; justify-content: center; margin-top: -1px; }
.q.answered .num { background: var(--ok-soft); color: var(--ok); }
.q .note { margin: 0 0 10px 36px; color: var(--mute); font-style: italic; font-size: 14.5px; }
.found { margin: 10px 0 12px 36px; background: var(--accent-soft); border-radius: 10px; padding: 12px 14px; }
.found .label, .label { font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); font-weight: 700; margin-bottom: 4px; }
.found p { margin: 4px 0; font-size: 15px; }
.confirm { margin-top: 10px; border: 1px solid var(--accent); background: #fff; color: var(--accent); border-radius: 99px; padding: 6px 14px; font: inherit; font-size: 14px; cursor: pointer; }
.confirm.on { background: var(--ok); border-color: var(--ok); color: #fff; }
.options { margin: 8px 0 10px 36px; display: grid; gap: 6px; }
.opt { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; cursor: pointer; }
.opt input { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--ok); flex: none; }
textarea { display: block; width: calc(100% - 36px); margin-left: 36px; min-height: 64px; resize: vertical; border: 1px solid var(--rule); border-radius: 10px; padding: 10px 12px; font: inherit; font-size: 15px; color: var(--ink); background: #fcfcfd; overflow: hidden; }
textarea:focus { outline: none; border-color: var(--accent); background: #fff; box-shadow: 0 0 0 3px var(--accent-soft); }

.finish { margin-top: 44px; background: #fff; border: 1px solid var(--rule); border-radius: var(--radius); padding: 22px; }
.finish h2 { margin: 0 0 6px; }
.primary { background: var(--accent); color: #fff; border: 0; border-radius: 10px; padding: 12px 22px; font: inherit; font-weight: 600; cursor: pointer; }
.primary:disabled { opacity: .6; }
.done-msg { color: var(--ok); font-weight: 600; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; padding-top: 18px; }
  .toc { display: none; }
  .progress .bar { width: 80px; }
  .q { padding: 16px 14px; }
  .q .note, .found, .options { margin-left: 0; }
  textarea { width: 100%; margin-left: 0; }
  .status.offline { max-width: 200px; }
}

/* admin */
.admin { max-width: 1100px; margin: 0 auto; padding: 32px 20px 80px; }
.admin table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--rule); border-radius: var(--radius); overflow: hidden; font-size: 14px; }
.admin th, .admin td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--rule); vertical-align: top; }
.admin th { background: #fafbfc; font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--mute); }
.admin td a { word-break: break-all; }
.admin .bar { width: 90px; height: 6px; background: var(--rule); border-radius: 99px; overflow: hidden; margin-bottom: 4px; }
.admin .bar span { display: block; height: 100%; background: var(--ok); }
.admin .q.empty { opacity: .7; }
.admin .q h3 { display: block; }
.admin .found { margin-left: 0; }
.admin .answer { background: var(--ok-soft); border-radius: 10px; padding: 10px 12px; white-space: normal; }
.pill.ok { display: inline-block; background: var(--ok); color: #fff; border-radius: 99px; padding: 2px 10px; font-size: 13px; margin-bottom: 6px; }