*,*:before,*:after{box-sizing:border-box}
:root{--ink:#14213d;--mut:#5b6476;--gold:#b8860b;--gold2:#d4a72c;--line:#e4e1d6;--soft:#f7f4ec}
html{-webkit-print-color-adjust:exact;print-color-adjust:exact}
body{margin:0;background:#ece9e0;color:var(--ink);font:15px/1.6 "DejaVu Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.bar{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 18px;background:#14213d;color:#fff}
.bar a{color:#fff;text-decoration:none}.bar span{display:flex;gap:8px}
.btn{display:inline-block;background:#d4a72c;color:#14213d;font:700 14px/1 inherit;border:0;border-radius:8px;padding:10px 14px;text-decoration:none;cursor:pointer}
.btn.alt{background:transparent;color:#fff;border:1.5px solid #d4a72c}
.cover,.session{max-width:820px;margin:18px auto;background:#fff;padding:40px 46px;border-radius:6px;box-shadow:0 1px 3px rgba(0,0,0,.08)}
.cover{text-align:center;background:linear-gradient(160deg,#0e162a,#14213d 60%,#1d2d52);color:#fff;min-height:1000px;display:flex;flex-direction:column;justify-content:center;align-items:center}
.cover img{width:110px;height:110px}
.cover small{color:#d4a72c;font-weight:700;letter-spacing:.12em;text-transform:uppercase;margin-top:10px}
.cover .kick{margin-top:26px;color:#d8deea;letter-spacing:.04em}
.cover h1{font-size:40px;line-height:1.15;margin:10px 0 14px}
.cover .lead{max-width:520px;color:#d8deea}
.toc{list-style:none;padding:0;margin:26px 0;text-align:left;width:100%;max-width:480px}
.toc li{border-bottom:1px solid rgba(255,255,255,.15);padding:9px 0;display:flex;gap:14px}
.toc span{color:#d4a72c;font-weight:700;min-width:84px}
.disc{font-size:11.5px;color:#9aa3b5;max-width:540px;margin-top:20px}
.shead{border-bottom:3px solid var(--gold2);padding-bottom:12px;margin-bottom:18px}
.snum{color:var(--gold);font-weight:700;letter-spacing:.1em;text-transform:uppercase;font-size:13px}
h2{font-size:28px;margin:4px 0 4px;line-height:1.2}
.smeta{color:var(--mut);font-size:13px}
h3{font-size:19px;margin:28px 0 8px;color:var(--ink);border-left:4px solid var(--gold2);padding-left:10px}
h4{font-size:15.5px;margin:18px 0 6px;color:var(--gold)}
p{margin:0 0 10px}ul,ol{margin:0 0 10px;padding-left:22px}li{margin:3px 0}
figure{margin:14px 0 18px;break-inside:avoid}
figure svg,.gi svg{display:block;width:100%;height:auto;border-radius:4px}
figcaption{font-size:13px;color:var(--mut);margin-top:6px}
.tvtip{font-size:12.5px;margin-top:6px;padding:7px 10px;background:#f1f4fb;border-left:3px solid #2962ff;border-radius:3px;color:#33415c}
.tvtip span{font-weight:700;color:#2962ff;margin-right:8px}
.grid{display:grid;gap:12px;margin:12px 0 16px}.g3{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
.gi{break-inside:avoid}.gc{font-size:12px;color:var(--mut);margin-top:5px;line-height:1.45}.gc b{color:var(--ink)}
.box{border-radius:6px;padding:12px 16px;margin:14px 0;break-inside:avoid;font-size:14px}
.box>b{display:block;margin-bottom:4px}
.box ul,.box ol{margin:4px 0 0}
.obj{background:var(--soft);border:1px solid var(--line)}
.key{background:#eef8f6;border-left:4px solid #26a69a}
.warn{background:#fdf0f0;border-left:4px solid #ef5350}
.tv{background:#f1f4fb;border-left:4px solid #2962ff}
.teach{background:#fff8e6;border-left:4px solid #d4a72c}
.hw{background:var(--soft);border-left:4px solid var(--ink)}
.jr{background:#f5f0fb;border-left:4px solid #ab47bc}
.jr table{margin:8px 0 6px;background:#fff}
table{width:100%;border-collapse:collapse;margin:10px 0 16px;font-size:13.5px;break-inside:avoid}
th{background:#14213d;color:#fff;text-align:left;padding:7px 9px;font-weight:600}
td{border-bottom:1px solid var(--line);padding:7px 9px;vertical-align:top}
tr:nth-child(even) td{background:#faf8f2}
table.blank td{height:30px}
.quiz{break-inside:auto}.quiz>ol>li{break-inside:avoid;margin-bottom:10px}.quiz>ol>li>p{margin:0 0 3px;font-weight:600}
.quiz ol[type=A]{color:var(--mut)}
.ans li{margin:6px 0}
.check{list-style:none;padding:0}.check li:before{content:"\2610";margin-right:8px;color:var(--gold);font-size:16px}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.diagram{display:block;width:100%;height:auto}
@media(max-width:700px){.cover,.session{padding:24px 18px;margin:0 0 10px;border-radius:0}.g3{grid-template-columns:1fr 1fr}.cols{grid-template-columns:1fr}.cover{min-height:0;padding:50px 18px}}
@page{size:A4;margin:14mm 13mm 16mm}
@media print{
 body{background:#fff;font-size:12.5px}
 .bar{display:none}
 .cover,.session{max-width:none;margin:0;padding:0;box-shadow:none;border-radius:0;break-before:page}
 .cover{min-height:265mm;break-before:auto;padding:0 30px}
 h2{font-size:24px}h3{font-size:16px;break-after:avoid}h4{break-after:avoid}
 .box{font-size:12px}table{font-size:11.5px}
 figure{margin:8px 0 12px}
}
.cover .edition{display:inline-block;margin:0 0 14px;padding:5px 14px;border:1.5px solid #d4a72c;border-radius:999px;color:#d4a72c;font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.myans{margin-top:4px;font-size:13px;color:var(--mut)}
.tick{color:var(--gold);font-size:16px;line-height:1}
.sheet h3{margin:16px 0 6px}.sheet table{margin:6px 0 10px}.sheet p{margin:0 0 8px}
@media print{.sheet{font-size:11.5px}.sheet h2{font-size:21px}.sheet .shead{margin-bottom:10px}.sheet h3{font-size:14px;margin:12px 0 4px}.sheet table{font-size:11px;margin:4px 0 8px}.sheet td,.sheet th{padding:5px 7px}.sheet .box{font-size:11px;margin:8px 0;padding:8px 12px}}