:root{
  --ground:#F4F6F8; --surface:#FFFFFF; --surface-2:#EDF1F5;
  --ink:#131A22; --ink-2:#4A5763; --ink-3:#7C8894;
  --line:#DCE3EA; --line-2:#C6D0DA;
  --accent:#0B5FA5; --accent-soft:#E4EEF7;
  --accent-ink:#08497E;
  --ok:#0F6E5E; --ok-soft:#E1F0EC;
  --warn:#9A5B08; --warn-soft:#F7EBDC;
  --shadow:0 1px 2px rgba(19,26,34,.06), 0 8px 24px rgba(19,26,34,.05);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ground:#0E1319; --surface:#151C24; --surface-2:#1D262F;
    --ink:#E6ECF2; --ink-2:#A5B2BF; --ink-3:#76838F;
    --line:#26313C; --line-2:#33404D;
    --accent:#4E9BDD; --accent-soft:#152A3E; --accent-ink:#9CC8EE;
    --ok:#4FBFA6; --ok-soft:#122C27;
    --warn:#D79B4A; --warn-soft:#2E2317;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.3);
  }
}
:root[data-theme="dark"]{
  --ground:#0E1319; --surface:#151C24; --surface-2:#1D262F;
  --ink:#E6ECF2; --ink-2:#A5B2BF; --ink-3:#76838F;
  --line:#26313C; --line-2:#33404D;
  --accent:#4E9BDD; --accent-soft:#152A3E; --accent-ink:#9CC8EE;
  --ok:#4FBFA6; --ok-soft:#122C27;
  --warn:#D79B4A; --warn-soft:#2E2317;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.3);
}

*{box-sizing:border-box}
body{
  margin:0; background:var(--ground); color:var(--ink);
  font-family:"Noto Sans JP",system-ui,-apple-system,"Hiragino Kaku Gothic ProN",sans-serif;
  font-size:15px; line-height:1.75; -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.disp{font-family:"Zen Kaku Gothic New","Noto Sans JP",system-ui,sans-serif;text-wrap:balance}
.mono{font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,monospace;font-variant-numeric:tabular-nums}

/* ---------- shell ---------- */
.shell{display:grid;grid-template-columns:264px minmax(0,1fr);min-height:100vh}
@media (max-width:900px){.shell{grid-template-columns:1fr}}

/* ---------- rail ---------- */
.rail{
  background:var(--surface);border-right:1px solid var(--line);
  padding:22px 18px 32px;position:sticky;top:0;height:100vh;overflow-y:auto;
  display:flex;flex-direction:column;gap:18px;
}
@media (max-width:900px){.rail{position:static;height:auto;border-right:none;border-bottom:1px solid var(--line);padding:16px}}
.brand{display:flex;flex-direction:column;gap:3px}
.brand .eyebrow{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);font-weight:500}
.brand h1{margin:0;font-size:16px;font-weight:700;letter-spacing:.01em}
.meter{display:flex;flex-direction:column;gap:7px}
.meter-top{display:flex;justify-content:space-between;align-items:baseline}
.meter-top .n{font-size:12px;color:var(--ink-2)}
.meter-top .v{font-size:12px;font-weight:600}
.bar{height:4px;background:var(--surface-2);border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent);border-radius:99px;transition:width .35s ease}
.qlist{display:flex;flex-direction:column;gap:1px;margin:0;padding:0;list-style:none}
@media (max-width:900px){.qlist{display:none}}
.qitem{display:flex;gap:9px;align-items:flex-start;padding:6px 8px;border-radius:6px;cursor:pointer;border:none;background:none;text-align:left;width:100%;font:inherit;color:var(--ink-2)}
.qitem:hover{background:var(--surface-2)}
.qitem[aria-current="true"]{background:var(--accent-soft);color:var(--accent-ink)}
.qitem .num{font-family:"IBM Plex Mono",monospace;font-size:11px;font-weight:600;min-width:19px;padding-top:2px;color:var(--ink-3)}
.qitem[aria-current="true"] .num{color:var(--accent)}
.qitem.done .num{color:var(--ok)}
.qitem .lbl{font-size:12.5px;line-height:1.5;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.rail-foot{margin-top:auto;font-size:11px;color:var(--ink-3);line-height:1.65;border-top:1px solid var(--line);padding-top:14px}
.rail-foot button{margin-top:8px}

/* ---------- main ---------- */
.main{padding:34px 26px 140px;display:flex;justify-content:center}
@media (max-width:900px){.main{padding:22px 16px 120px}}
.col{width:100%;max-width:690px;display:flex;flex-direction:column;gap:18px}

.msg{display:flex;gap:12px;align-items:flex-start;animation:rise .32s ease both}
@keyframes rise{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.msg{animation:none}.bar i{transition:none}}
.avatar{
  width:28px;height:28px;flex:0 0 28px;border-radius:7px;display:grid;place-items:center;
  font-family:"IBM Plex Mono",monospace;font-size:10px;font-weight:600;letter-spacing:.02em;margin-top:2px;
  background:var(--accent);color:#fff;
}
.msg.me .avatar{background:var(--surface-2);color:var(--ink-2);border:1px solid var(--line)}
.bubble{
  background:var(--surface);border:1px solid var(--line);border-radius:4px 12px 12px 12px;
  padding:15px 17px;box-shadow:var(--shadow);flex:1;min-width:0;
}
.msg.me{flex-direction:row-reverse}
.msg.me .bubble{border-radius:12px 4px 12px 12px;background:var(--accent-soft);border-color:transparent}
.bubble p{margin:0 0 9px}
.bubble p:last-child{margin-bottom:0}
.qnum{font-family:"IBM Plex Mono",monospace;font-size:11px;font-weight:600;letter-spacing:.08em;color:var(--accent);display:block;margin-bottom:5px}
.qtext{font-family:"Zen Kaku Gothic New","Noto Sans JP",sans-serif;font-weight:500;font-size:16.5px;line-height:1.6;margin:0}

/* ---------- answer widgets ---------- */
.widget{display:flex;flex-direction:column;gap:11px;margin-top:14px}
.yn{display:flex;gap:9px;flex-wrap:wrap}
.btn{
  font:inherit;font-size:14px;font-weight:500;cursor:pointer;border-radius:8px;
  padding:9px 20px;border:1px solid var(--line-2);background:var(--surface);color:var(--ink);
  transition:border-color .15s,background .15s,transform .06s;
}
.btn:hover{border-color:var(--accent);background:var(--accent-soft)}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{filter:brightness(1.08);background:var(--accent)}
.btn.ghost{border-color:transparent;background:none;color:var(--ink-2);padding:7px 12px;font-size:13px}
.btn.ghost:hover{background:var(--surface-2);color:var(--ink)}
.btn.danger{color:var(--ink-3)}
.btn.danger:hover{background:#fbe9e7;color:#b3261e}
td.nowrap{white-space:nowrap}
.btn.sm{padding:6px 13px;font-size:12.5px}

.fields{display:flex;flex-direction:column;gap:8px}
.field{display:grid;grid-template-columns:1fr 96px 42px;gap:9px;align-items:center}
.field label{font-size:13.5px;color:var(--ink-2)}
.field input{
  font-family:"IBM Plex Mono",monospace;font-size:15px;font-weight:500;text-align:right;
  padding:8px 11px;border:1px solid var(--line-2);border-radius:7px;
  background:var(--surface);color:var(--ink);width:100%;
}
.field input:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:transparent}
.field .unit{font-size:12.5px;color:var(--ink-3)}
.sum{display:flex;justify-content:space-between;align-items:center;font-size:12.5px;padding:7px 11px;border-radius:7px;background:var(--surface-2);color:var(--ink-2)}
.sum.bad{background:var(--warn-soft);color:var(--warn)}
.sum.good{background:var(--ok-soft);color:var(--ok)}
.sum b{font-family:"IBM Plex Mono",monospace;font-weight:600}

/* ---------- system reply ---------- */
.reply{border-left:2px solid var(--accent);padding-left:13px;margin-top:2px;display:flex;flex-direction:column;gap:9px}
.kicker{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);font-weight:600}
.fn{display:flex;flex-wrap:wrap;gap:6px}
.chip{
  font-family:"IBM Plex Mono",monospace;font-size:11.5px;font-weight:500;
  padding:3px 9px;border-radius:5px;background:var(--surface-2);color:var(--ink-2);
  border:1px solid var(--line);white-space:nowrap;
}
.chip b{font-weight:600;color:var(--accent)}
.bench{display:flex;gap:16px;flex-wrap:wrap;padding:11px 13px;background:var(--surface-2);border-radius:8px}
.bench .k{font-size:10.5px;color:var(--ink-3);letter-spacing:.06em;display:block}
.bench .v{font-family:"IBM Plex Mono",monospace;font-size:15px;font-weight:600}
.note-wrap{display:flex;flex-direction:column;gap:8px;margin-top:3px}
textarea{
  font:inherit;font-size:14px;width:100%;min-height:74px;resize:vertical;
  padding:10px 12px;border:1px solid var(--line-2);border-radius:8px;
  background:var(--surface);color:var(--ink);line-height:1.7;
}
textarea:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:transparent}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}

/* ---------- summary ---------- */
.sumhead{display:flex;flex-direction:column;gap:5px;margin-bottom:4px}
.sumhead h2{margin:0;font-size:22px;font-weight:700}
.sumhead p{margin:0;color:var(--ink-2);font-size:14px}
.tblwrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:13.5px;min-width:560px}
th,td{text-align:left;padding:10px 13px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);font-weight:600;background:var(--surface-2)}
tr:last-child td{border-bottom:none}
td.n{font-family:"IBM Plex Mono",monospace;font-weight:600;color:var(--ink-3);width:38px}
td.a{font-family:"IBM Plex Mono",monospace;font-weight:600;white-space:nowrap}
.tag{display:inline-block;font-size:11px;font-weight:600;padding:1px 8px;border-radius:99px}
.tag.y{background:var(--ok-soft);color:var(--ok)}
.tag.n{background:var(--warn-soft);color:var(--warn)}
.muted{color:var(--ink-3);font-size:12.5px}
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);background:var(--ink);color:var(--ground);padding:9px 18px;border-radius:99px;font-size:13px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .2s}
.toast.on{opacity:1}

@media print{
  .rail,.noprint{display:none!important}
  .shell{display:block}.main{padding:0}
  body{background:#fff}
  .tblwrap{border:none}
}

/* ---------- 共通追加（web版） ---------- */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 18px;border-bottom:1px solid var(--line);background:var(--surface);position:sticky;top:0;z-index:5}
.topbar .who{font-size:13px;color:var(--ink-2)}
.topbar .who b{color:var(--ink);font-weight:600}
.save{font-size:11.5px;color:var(--ink-3);display:inline-flex;align-items:center;gap:6px}
.save i{width:7px;height:7px;border-radius:99px;background:var(--ok);display:inline-block}
.save.busy i{background:var(--warn)}
.save.err i{background:#C0392B}
.center{min-height:70vh;display:grid;place-items:center;padding:24px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:26px 28px;box-shadow:var(--shadow);max-width:520px;width:100%}
.card h2{margin:0 0 8px;font-size:19px}
.card p{margin:0 0 14px;color:var(--ink-2);font-size:14px}
.input{font:inherit;font-size:14.5px;width:100%;padding:10px 12px;border:1px solid var(--line-2);border-radius:8px;background:var(--surface);color:var(--ink)}
.input:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:transparent}
.stack{display:flex;flex-direction:column;gap:10px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (max-width:600px){.split{grid-template-columns:1fr}}
.kv{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-size:13px}
.kv dt{color:var(--ink-3)}.kv dd{margin:0}
.pill{display:inline-block;font-size:11px;font-weight:600;padding:2px 9px;border-radius:99px;background:var(--surface-2);color:var(--ink-2)}
.pill.done{background:var(--ok-soft);color:var(--ok)}
.pill.prog{background:var(--accent-soft);color:var(--accent-ink)}
.link{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--accent);word-break:break-all}
.section{display:flex;flex-direction:column;gap:12px}
.section h3{margin:0;font-size:15px;font-weight:700}
.hr{border:0;border-top:1px solid var(--line);margin:6px 0}
.admin{max-width:1080px;margin:0 auto;padding:26px 22px 80px;display:flex;flex-direction:column;gap:26px}
.two{display:grid;grid-template-columns:320px minmax(0,1fr);gap:22px}
@media (max-width:900px){.two{grid-template-columns:1fr}}
.list{display:flex;flex-direction:column;gap:2px}
.list button{text-align:left;font:inherit;font-size:13.5px;padding:8px 10px;border-radius:7px;border:1px solid transparent;background:none;color:var(--ink);cursor:pointer;display:flex;justify-content:space-between;gap:8px;align-items:center}
.list button:hover{background:var(--surface-2)}
.list button[aria-current="true"]{background:var(--accent-soft);border-color:transparent;color:var(--accent-ink)}
.small{font-size:12px;color:var(--ink-3)}