:root { --ink:#16202b; --muted:#5d6b7a; --line:#e6eaf0; --bg:#f4f6f9; --card:#fff; --link:#1f6fd6; --soft:#eef1f5;
  --cap:#3a3f49; --capfg:#f3f5f9; --sh:#2f6fe0; --al:#1d8f5a; }
@media (prefers-color-scheme: dark) { :root { --ink:#e8eaf0; --muted:#9aa5b4; --line:#262c36; --bg:#0c0e12; --card:#151920; --link:#7fb2ff; --soft:#1b2029; --sh:#7fb2ff; --al:#5fd39a; } }
.fam-ti { --fam:#4f8cf0; }
.fam-casio { --fam:#e5574f; --sh:#c98a00; --al:#d2463e; }
.fam-hp { --fam:#e3a43a; --sh:#c98a00; --al:#2f7fd0; }
@media (prefers-color-scheme: dark) { .fam-casio { --sh:#f2c14e; --al:#ff7a70; } .fam-hp { --sh:#f2c14e; --al:#6fb0ff; } }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin:0; font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; color:var(--ink); background:var(--bg); }
.wrap { max-width: 900px; margin: 0 auto; padding: 0 16px; }
a { color: var(--link); font-weight: 600; text-underline-offset: 2px; }
h1 { font-size: clamp(28px, 5vw, 40px); margin: 18px 0 6px; letter-spacing: -0.01em; line-height: 1.15; }
h2 { font-size: 21px; margin: 34px 0 10px; }
h3 { font-size: 17px; margin: 0 0 8px; }
li { margin: 4px 0; }
.sr { position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0); }
.top { background: var(--card); border-bottom: 1px solid var(--line); }
.top-in { display:flex; align-items:center; justify-content:space-between; gap:12px; height:56px; }
.brand { display:flex; align-items:center; gap:10px; color:var(--ink); text-decoration:none; font-weight:700; font-size:17px; }
.brand img { border-radius: 7px; }
.open { font-size: 15px; white-space: nowrap; }
.crumbs { margin: 18px 0 0; font-size: 14px; color: var(--muted); display:flex; flex-wrap:wrap; gap:4px; }
.crumbs a { font-weight: 600; }
.kicker { margin: 18px 0 0; font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.kicker a { color: inherit; text-decoration: none; }
.lede { font-size: 18px; color: var(--muted); margin: 0 0 14px; }
.btn { display:inline-block; padding: 9px 16px; border-radius: 10px; background: var(--link); color: #fff; text-decoration: none; font-size: 15px; }
@media (prefers-color-scheme: dark) { .btn { color: #0c0e12; } }
.hero { padding: 6px 0 4px; }
.search input { width: 100%; font: inherit; font-size: 17px; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--card); color: var(--ink); }
.search input:focus { outline: 2px solid var(--link); outline-offset: 1px; }
.cards { list-style: none; padding: 0; margin: 12px 0; display: grid; gap: 8px; }
.card-link { display:flex; flex-direction:column; gap:2px; padding: 12px 16px; border-radius: 12px; background: var(--card); border: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.card-link:hover { border-color: var(--link); }
.card-link span { font-weight: 400; color: var(--muted); font-size: 15px; }
.none { color: var(--muted); padding: 8px 2px; }
.courses { display:grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.course { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px 18px; }
.course h3 a { color: var(--ink); text-decoration: none; }
.course h3 small { color: var(--muted); font-weight: 600; font-size: 13px; margin-inline-start: 6px; }
.course p { margin: 0 0 6px; color: var(--muted); font-size: 15px; }
.course ul { margin: 0; padding-inline-start: 18px; font-size: 15px; }
.course li a { font-weight: 500; }
.models { list-style:none; padding:0; display:grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 8px; }
.models a { display:grid; grid-template-columns: auto 1fr; column-gap: 10px; align-items: center; padding: 12px 14px; border-radius: 12px; background: var(--card); border: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.models a span:last-child { grid-column: 2; color: var(--muted); font-weight: 400; font-size: 14px; }
.dot { display:inline-block; width:10px; height:10px; border-radius:50%; background: var(--fam, var(--link)); margin-inline-end: 8px; vertical-align: 1px; }
.models .dot { margin: 0; }
.jump { display:flex; flex-wrap:wrap; gap:6px; margin: 16px 0 4px; }
.jump a { padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); text-decoration: none; font-size: 14px; }
.method { background: var(--card); border: 1px solid var(--line); border-inline-start: 4px solid var(--fam, var(--link)); border-radius: 14px; padding: 16px 18px; margin: 14px 0; }
.method h3 { display:flex; align-items:center; }
.start { color: var(--muted); font-size: 14px; margin: 0 0 8px; }
.steps { padding-inline-start: 22px; margin: 8px 0; }
.steps li { margin: 0 0 12px; }
.steps li p { margin: 0 0 6px; }
.steps.prose li { margin-bottom: 8px; }
.result { display:flex; flex-wrap:wrap; gap: 4px 10px; align-items: baseline; background: var(--soft); border-radius: 10px; padding: 10px 12px; margin: 10px 0 6px; }
.result span { font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.result code { font: 15px/1.4 ui-monospace, "SF Mono", Menlo, Consolas, monospace; white-space: pre-wrap; }
.note, .small { font-size: 14px; color: var(--muted); margin: 6px 0 0; }
.caps { display:flex; flex-wrap:wrap; gap:5px; }
kbd.k { display:inline-flex; flex-direction:column; align-items:center; justify-content:center; min-width: 2.2em; min-height: 2em; padding: 0.2em 0.55em; border-radius: 0.45em;
  font: 600 14px/1 system-ui, -apple-system, "Segoe UI", sans-serif; color: var(--capfg); background: linear-gradient(180deg, #4a505b, var(--cap));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.14), 0 1.5px 0 rgba(0,0,0,.4); white-space: nowrap; }
kbd.s-num { background: linear-gradient(180deg, #5b616c, #474c56); }
kbd.s-enter { background: linear-gradient(180deg, #4f8cf0, #2f6fe0); }
kbd.s-shift { background: var(--sh); color: #fff; }
kbd.s-alpha { background: var(--al); color: #fff; }
kbd.k-shift, kbd.k-alpha { background: var(--card); box-shadow: inset 0 0 0 1.5px currentColor; }
kbd.k-shift { color: var(--sh); }
kbd.k-alpha { color: var(--al); }
kbd small { font-size: 9.5px; color: var(--muted); margin-top: 2px; font-weight: 600; }
.bx { display:inline-block; width: .5em; height: .62em; border: 1.3px solid currentColor; border-radius: 2px; vertical-align: -0.05em; margin: 0 .04em; }
small .bx { width: .45em; height: .55em; border-width: 1px; }
.kgrid { display:grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 8px; }
.kref { display:flex; gap: 10px; align-items:flex-start; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.kref dl { margin: 0; display:grid; gap: 5px; flex: 1; min-width: 0; }
.kref dt { font-weight: 650; font-size: 14px; display:flex; gap:6px; align-items:center; }
.kref dd { margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.4; }
.ly-shift dt, .ly-shift2 dt { color: var(--sh); }
.ly-alpha dt { color: var(--al); }
.via { font-size: 11px; font-weight: 750; padding: 0 5px; border-radius: 5px; border: 1px solid currentColor; }
.defs { display:grid; gap: 8px; margin: 0; }
.defs div { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; }
.defs dt { font-weight: 700; }
.defs dd { margin: 2px 0 0; color: var(--muted); }
.foot { border-top: 1px solid var(--line); margin-top: 40px; padding-top: 18px; padding-bottom: 40px; color: var(--muted); font-size: 14px; }