:root{
  --red:#da1b2e; --red-deep:#790c1c;
  --bg:#fdeef0; --card:#ffffff; --card-dark:#16101d; --card-dark-ink:#ffffff;
  --border:#f2bdc3; --ink:#1a1420; --muted:#5f5158; --field-bg:#ffffff;
  --header-g1:#0c0c2c; --header-g2:#341257;
  --ok:#1a7f4e; --shadow:0 2px 6px rgba(121,12,28,.08);
}
:root[data-mode="dark"]{
  --bg:#160a0f; --card:#221219; --card-dark:#0f0a16; --border:#4d2634;
  --ink:#f6ebee; --muted:#c1a6ad; --field-bg:#2b171f;
  --shadow:0 2px 8px rgba(0,0,0,.4);
}
:root{color-scheme:light}
:root[data-mode="dark"]{color-scheme:dark}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:Inter,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:15px;line-height:1.55}

/* ---------- top bar ---------- */
.topbar{position:sticky;top:0;z-index:50;
  background:linear-gradient(100deg,var(--header-g1),var(--header-g2));
  border-bottom:4px solid var(--red);padding:10px 16px}
.topbar-inner{max-width:820px;margin:0 auto;display:flex;align-items:center;gap:14px}
.logo-chip{background:#fff;border-radius:6px;padding:5px 10px;display:flex;align-items:center;
  box-shadow:var(--shadow)}
.logo-chip img{height:22px;display:block}
.topbar .t-title{color:#fff;font-weight:700;font-size:13px;flex:1;min-width:0;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.t-progress{display:flex;align-items:center;gap:8px;color:#fff;font-size:11px;font-weight:700}
.t-bar{width:120px;height:6px;background:rgba(255,255,255,.2);border-radius:3px;overflow:hidden}
.t-bar i{display:block;height:100%;width:0;background:var(--red);border-radius:3px;transition:width .3s}
.theme-toggle{border:1.5px solid rgba(255,255,255,.45);background:transparent;color:#fff;
  border-radius:999px;padding:5px 12px;font:inherit;font-size:11.5px;font-weight:700;
  cursor:pointer;white-space:nowrap}
.theme-toggle:hover{border-color:#fff}
.theme-toggle:focus-visible{outline:2px solid var(--red);outline-offset:2px}

main{max-width:820px;margin:0 auto;padding:28px 16px 80px}

/* ---------- page section ---------- */
section.page{margin-bottom:36px;border-radius:12px;overflow:hidden;
  border:1px solid var(--border);background:var(--card);box-shadow:var(--shadow)}
.page-head{background:linear-gradient(100deg,var(--header-g1),var(--header-g2));
  padding:22px 26px 20px;border-bottom:5px solid var(--red);position:relative}
.page-head .eyebrow{color:var(--red);font-size:10.5px;font-weight:800;letter-spacing:.14em;
  text-transform:uppercase;margin:0 0 6px}
.page-head h2{color:#fff;font-size:clamp(20px,3.4vw,27px);font-weight:800;margin:0;
  line-height:1.2;text-wrap:balance}
.page-num{position:absolute;top:18px;right:22px;color:#ffb3bb;font-size:10.5px;font-weight:800}
.page-intro{padding:14px 26px;font-weight:600;font-size:14px;border-bottom:1px solid var(--border)}
.page-body{padding:20px 26px 26px;display:flex;flex-direction:column;gap:16px}

/* ---------- cards ---------- */
.card{border:1px solid var(--border);border-radius:8px;padding:16px;background:var(--card)}
.card .label{color:var(--red);font-size:10.5px;font-weight:800;letter-spacing:.12em;
  text-transform:uppercase;margin:0 0 8px}
.card .label:not(:first-child){margin-top:16px}
.card h3{font-size:16px;font-weight:700;margin:0 0 6px}
.card p{margin:0;color:var(--muted);font-size:13.5px}
.card ol,.card ul{margin:6px 0 0;padding-left:20px;color:var(--muted);font-size:13.5px}
.card li{margin:3px 0}
.card.dark{background:var(--card-dark);border-color:transparent}
.card.dark h3{color:var(--card-dark-ink)}
.card.dark p{color:#cdbfd6}
.card.dark blockquote{color:#cdbfd6}
.card.dark ol,.card.dark ul{color:#cdbfd6}
.rule-block{background:var(--bg);border:1px dashed var(--border);border-radius:6px;
  padding:12px 14px;margin-top:10px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:12.5px;line-height:1.6;white-space:pre-wrap}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em;
  background:var(--bg);padding:1px 5px;border-radius:4px}

/* ---------- inputs ---------- */
textarea,input[type="text"],input[type="date"]{width:100%;border:1px solid var(--red);border-radius:6px;
  background:var(--field-bg);color:var(--ink);padding:10px 12px;font:inherit;font-size:13.5px;
  resize:vertical;min-height:44px}
.card p+textarea,.card p+input[type="text"],.card p+input[type="date"]{margin-top:8px}
textarea{min-height:88px;field-sizing:content}
textarea:focus,input:focus,select:focus{outline:2px solid var(--red);outline-offset:1px}

/* ---------- tables ---------- */
.tbl-wrap{overflow-x:auto}
table{border-collapse:collapse;width:100%;min-width:640px;font-size:13px}
th,td{border:1px solid var(--border);padding:8px;text-align:left;vertical-align:top}
th{background:var(--bg);font-size:11px;text-transform:uppercase;letter-spacing:.06em;
  color:var(--muted)}
td.dim{font-weight:700;font-size:12.5px;width:150px}
td .what{color:var(--muted);font-size:12px}
td textarea{min-height:88px;border-color:var(--border)}
td textarea:not(:placeholder-shown),textarea.filled{border-color:var(--red)}
select.score{border:1.5px solid var(--border);border-radius:6px;background:var(--field-bg);
  color:var(--ink);font:inherit;font-weight:700;padding:6px 8px;min-width:58px}
select.score.filled{border-color:var(--red);color:var(--red)}

/* ---------- Y/P/N segmented control ---------- */
.seg{display:inline-flex;border:1.5px solid var(--border);border-radius:6px;overflow:hidden}
.seg label{padding:5px 9px;font-size:11px;font-weight:800;cursor:pointer;
  color:var(--muted);background:var(--field-bg);border-right:1px solid var(--border);
  user-select:none;line-height:1}
.seg label:last-child{border-right:0}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg label:has(input:checked){background:var(--red);color:#fff}
.seg label:has(input:focus-visible){outline:2px solid var(--red);outline-offset:-2px}

/* ---------- footer actions ---------- */
.actions{position:fixed;bottom:0;left:0;right:0;z-index:50;
  background:linear-gradient(100deg,var(--header-g1),var(--header-g2));
  border-top:3px solid var(--red);padding:10px 16px}
.actions-inner{max-width:820px;margin:0 auto;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.btn{border:0;border-radius:6px;padding:9px 16px;font:inherit;font-size:13px;font-weight:800;
  cursor:pointer;background:var(--red);color:#fff}
.btn.ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.4)}
.btn:hover{filter:brightness(1.1)}
.save-note{color:#ffb3bb;font-size:11.5px;font-weight:600;margin-left:auto}

/* ---------- export overlay ---------- */
.overlay{position:fixed;inset:0;z-index:100;background:rgba(10,5,12,.6);display:none;
  align-items:center;justify-content:center;padding:20px}
.overlay.open{display:flex}
.modal{background:var(--card);color:var(--ink);border:1px solid var(--border);border-radius:12px;
  max-width:680px;width:100%;max-height:85vh;display:flex;flex-direction:column;
  box-shadow:0 12px 40px rgba(0,0,0,.35)}
.modal-head{display:flex;align-items:center;gap:10px;padding:14px 18px;
  border-bottom:1px solid var(--border)}
.modal-head h3{margin:0;font-size:15px;flex:1}
.modal-head .x{border:0;background:none;color:var(--muted);font-size:20px;cursor:pointer;
  line-height:1;padding:4px 8px}
.modal-tabs{display:flex;gap:8px;padding:12px 18px 0}
.mtab{border:1.5px solid var(--border);background:var(--field-bg);color:var(--muted);
  border-radius:999px;padding:6px 14px;font:inherit;font-size:12.5px;font-weight:700;cursor:pointer}
.mtab.active{border-color:var(--red);color:var(--red);background:var(--bg)}
.modal-body{padding:12px 18px 18px;display:flex;flex-direction:column;gap:10px;min-height:0}
.modal-body textarea{flex:1;min-height:260px;max-height:45vh;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:12px;field-sizing:initial;resize:none}
.modal-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.modal-actions .hint{font-size:11.5px;color:var(--muted);margin-left:auto}
.copied{color:var(--ok);font-weight:700;font-size:12.5px}

/* ---------- index page ---------- */
.exercise-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
.exercise-list a{display:block;padding:16px 20px;border:1px solid var(--border);border-radius:8px;
  background:var(--card);color:var(--ink);text-decoration:none;font-weight:700;font-size:15px}
.exercise-list a:hover{border-color:var(--red)}
.exercise-list .meta{display:block;margin-top:4px;color:var(--muted);font-weight:400;font-size:12.5px}
.exercise-list .desc{display:block;margin-top:8px;color:var(--ink);font-weight:400;font-size:13.5px;line-height:1.5}

/* ---------- print ---------- */
@media print{
  .topbar,.actions{position:static}
  .actions{display:none}
  body{background:#fff}
  section.page{break-inside:avoid-page;box-shadow:none;margin-bottom:20px}
  textarea{border-color:#999;field-sizing:content;overflow:hidden}
  main{padding-bottom:0}
}
@media (prefers-reduced-motion: reduce){.t-bar i{transition:none}}