:root{
  --ink:#1f2a44; --muted:#5b6478; --paper:#fffaf0; --line:#e8dcc4;
  --saffron:#f28c28; --saffron-d:#d9701a; --green:#2e8b57; --blue:#2754c5;
  --pink:#e0457b; --purple:#7a4cc2; --teal:#0f9aa0; --radius:16px;
  --shadow:0 2px 0 #e9dcc2, 0 8px 24px rgba(31,42,68,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Mukta",system-ui,sans-serif;color:var(--ink);background:var(--paper);
  background-image:linear-gradient(transparent 31px,#f1e6cf 32px);background-size:100% 32px;line-height:1.6;font-size:17px}
h1,h2,h3,.brand{font-family:"Baloo 2","Mukta",sans-serif;line-height:1.2;margin:0 0 .4em}
h1{font-size:clamp(1.9rem,4.5vw,2.9rem)} h2{font-size:clamp(1.4rem,3vw,1.9rem)} h3{font-size:1.2rem}
a{color:var(--blue)} img{max-width:100%;display:block}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:9}

/* header */
.top{background:#fff;border-bottom:3px solid var(--saffron);position:sticky;top:0;z-index:5}
.top .wrap{display:flex;align-items:center;gap:20px;min-height:68px}
.brand{font-size:1.7rem;font-weight:800;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:8px;margin:0}
.brand .dot{width:34px;height:34px;border-radius:9px;background:var(--saffron);color:#fff;display:grid;place-items:center;font-size:1.2rem;transform:rotate(-6deg)}
.brand small{font-size:.8rem;color:var(--green);font-weight:700;margin-left:-4px;align-self:flex-end;margin-bottom:6px}
.nav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}
.nav a{text-decoration:none;color:var(--ink);font-weight:600;padding:8px 12px;border-radius:10px}
.nav a:hover,.nav a[aria-current]{background:#fff1e0;color:var(--saffron-d)}
.menu-btn{display:none;margin-left:auto;background:none;border:2px solid var(--line);border-radius:10px;padding:6px 12px;font:inherit;font-weight:700}
@media(max-width:820px){.menu-btn{display:block}.nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:10px 20px;border-bottom:3px solid var(--saffron)}.nav.open{display:flex}}

/* hero */
.hero{padding:56px 0 40px;position:relative}
.hero .wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:560px}
.hi{color:var(--saffron-d)}
.badge{display:inline-block;background:#e8f5ec;color:var(--green);font-weight:700;padding:4px 12px;border-radius:999px;font-size:.9rem;margin-bottom:12px}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--saffron);color:#fff;text-decoration:none;font-weight:700;padding:12px 22px;border-radius:12px;border:0;box-shadow:0 4px 0 var(--saffron-d);font-size:1.05rem;cursor:pointer}
.btn:hover{transform:translateY(1px);box-shadow:0 3px 0 var(--saffron-d)}
.btn.alt{background:#fff;color:var(--ink);box-shadow:0 4px 0 var(--line);border:2px solid var(--line)}
.btn.green{background:var(--green);box-shadow:0 4px 0 #1f6a40}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.slate{background:#24473a;color:#f5f1e6;border-radius:18px;padding:26px;border:10px solid #a5713f;box-shadow:var(--shadow);font-family:"Baloo 2",sans-serif;transform:rotate(1.5deg)}
.slate .big{font-size:2.6rem;line-height:1.1}
.slate .chalk{opacity:.85;font-size:1.2rem}
@media(max-width:820px){.hero .wrap{grid-template-columns:1fr}.slate{transform:none}}

/* sections */
section{padding:34px 0}
.sec-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.sec-head p{margin:0;color:var(--muted)}
.grid{display:grid;gap:16px}
.g-classes{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
.g-subjects{grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}
.g-ws{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.card{background:#fff;border:2px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);text-decoration:none;color:var(--ink);display:block;transition:transform .15s}
a.card:hover{transform:translateY(-3px)}
.cls{padding:18px;text-align:center;border-top:8px solid var(--c,var(--saffron))}
.cls .n{font-family:"Baloo 2";font-size:1.5rem;font-weight:800;display:block}
.cls .h{color:var(--muted);font-size:.95rem}
.cls .count{display:inline-block;margin-top:6px;font-size:.8rem;font-weight:700;color:var(--c,var(--saffron));}
.subj{padding:18px;display:flex;gap:12px;align-items:center}
.subj .ic{width:48px;height:48px;border-radius:12px;display:grid;place-items:center;font-size:1.6rem;background:var(--bg,#fff1e0);flex:none}
.subj b{display:block;font-size:1.1rem}.subj span{color:var(--muted);font-size:.9rem}
.ws .thumb{aspect-ratio:1/1.3;background:#f7f2e8;border-bottom:2px solid var(--line);border-radius:14px 14px 0 0;overflow:hidden}
.ws .thumb img{width:100%;height:100%;object-fit:cover;object-position:top}
.ws .meta{padding:12px 14px}
.ws .meta b{display:block;line-height:1.3}
.tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.tag{font-size:.78rem;font-weight:700;padding:2px 9px;border-radius:999px;background:#eef2ff;color:var(--blue);text-decoration:none}
.tag.s{background:#fff1e0;color:var(--saffron-d)}
.empty{background:#fff;border:2px dashed var(--line);border-radius:var(--radius);padding:28px;text-align:center;color:var(--muted)}

/* filters */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 18px}
.chip{border:2px solid var(--line);background:#fff;border-radius:999px;padding:6px 14px;font:inherit;font-weight:600;cursor:pointer;text-decoration:none;color:var(--ink)}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}

/* worksheet page */
.crumbs{font-size:.92rem;color:var(--muted);padding-top:20px}.crumbs a{color:var(--muted)}
.ws-page{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:32px;align-items:start}
.preview{background:#fff;border:2px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.preview img{border:1px solid #eee;margin:0 auto 14px}
.side{position:sticky;top:90px}
.box{background:#fff;border:2px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:16px;box-shadow:var(--shadow)}
.box h3{margin-bottom:8px}
.box ul{padding-left:20px;margin:0}
.box.tips{background:#f2fbf5;border-color:#cfe9d8}
.ad{border:2px dashed var(--line);border-radius:12px;min-height:100px;display:grid;place-items:center;color:#b5aa94;font-size:.8rem;margin:20px 0}
@media(max-width:900px){.ws-page{grid-template-columns:1fr}.side{position:static}}

/* prose */
.prose{max-width:760px;background:#fff;border:2px solid var(--line);border-radius:var(--radius);padding:28px clamp(18px,4vw,40px);box-shadow:var(--shadow)}
.prose h2{margin-top:1.2em}
.post-meta{color:var(--muted);font-size:.92rem;margin-bottom:16px}
.parents{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.parents .box{margin:0}
.parents .box .ic{font-size:1.8rem}

/* footer */
footer{background:var(--ink);color:#d8dcea;margin-top:40px;padding:40px 0 24px}
footer a{color:#fff;text-decoration:none}footer a:hover{text-decoration:underline}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px}
footer h4{font-family:"Baloo 2";color:#fff;margin:0 0 8px;font-size:1.1rem}
footer ul{list-style:none;padding:0;margin:0}footer li{margin:4px 0}
.copy{border-top:1px solid #3a4666;margin-top:26px;padding-top:16px;font-size:.88rem;color:#a9b0c6}
@media(max-width:820px){.fgrid{grid-template-columns:1fr 1fr}}
@media print{.top,footer,.side,.ad,.crumbs{display:none}body{background:#fff}}
.ws .thumb{aspect-ratio:4/5}
.pn{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px}
.pn .card{padding:14px 16px}.pn small{display:block;color:var(--muted);font-weight:700}.pn .nx{text-align:right}
.idx-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;align-items:start}
.idx-grid .box{margin:0}.idx{columns:1;font-size:.95rem}.idx li{margin:2px 0}.idx a{text-decoration:none}.idx a:hover{text-decoration:underline}
.idx-grid h3 a{text-decoration:none;color:var(--ink)}
.brand img{height:52px;width:auto;display:block}
.top .wrap{min-height:74px}
.flogo{display:inline-block;background:#fff;border-radius:14px;padding:10px 14px;margin-bottom:10px}
.flogo img{height:62px;width:auto}
.hero-logo{height:96px;width:auto;margin-bottom:10px}
@media(max-width:820px){.nav{top:74px}.brand img{height:44px}}
/* product page */
.prod{display:grid;grid-template-columns:400px minmax(0,1fr);gap:36px;align-items:start;padding-top:18px}
.prod-img .zoom{display:block;width:100%;padding:10px;background:#fff;border:2px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);cursor:zoom-in;position:relative;font:inherit}
.prod-img img{width:100%;height:auto;border-radius:6px}
.zoom-hint{position:absolute;right:18px;bottom:18px;background:rgba(31,42,68,.85);color:#fff;font-size:.82rem;padding:4px 10px;border-radius:999px}
.prod-info h1{font-size:clamp(1.7rem,3.4vw,2.4rem)}
.prod-info .lead{font-size:1.12rem;color:var(--muted);margin:.2em 0 1em}
.facts{border-collapse:collapse;width:100%;max-width:440px;background:#fff;border:2px solid var(--line);border-radius:12px;overflow:hidden;margin-bottom:20px}
.facts th,.facts td{padding:8px 14px;text-align:left;border-bottom:1px solid #f0e6d2;font-size:.98rem}
.facts th{width:120px;color:var(--muted);font-weight:600;background:#fffaf0}
.facts tr:last-child th,.facts tr:last-child td{border-bottom:0}
.btn.big{font-size:1.15rem;padding:14px 26px}
.note{font-size:.9rem;color:var(--muted);margin-top:10px}
.prod-details{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.prod-details .box{margin:0}.prod-details h2{font-size:1.25rem;display:flex;gap:8px;align-items:center}
.prod-details p{margin:0}
.ticks{list-style:none;padding:0;margin:0}.ticks li{padding-left:28px;position:relative;margin:6px 0}
.ticks li:before{content:"✔";position:absolute;left:4px;color:var(--green);font-weight:700}
.steps{margin:0;padding-left:0;list-style:none;counter-reset:s}.steps li{counter-increment:s;padding-left:38px;position:relative;margin:8px 0}
.steps li:before{content:counter(s);position:absolute;left:0;top:1px;width:26px;height:26px;border-radius:50%;background:var(--saffron);color:#fff;font-weight:700;display:grid;place-items:center;font-size:.85rem}
.center{text-align:center;margin:26px 0 6px}
.lb{position:fixed;inset:0;background:rgba(20,24,40,.85);display:grid;place-items:center;z-index:50;padding:20px;cursor:zoom-out}
.lb[hidden]{display:none}.lb img{max-height:92vh;max-width:92vw;background:#fff;border-radius:8px;box-shadow:0 10px 40px rgba(0,0,0,.4)}
.lb-x{position:absolute;top:16px;right:20px;background:#fff;border:0;border-radius:50%;width:40px;height:40px;font-size:1.2rem;cursor:pointer}
@media(max-width:900px){.prod{grid-template-columns:1fr}.prod-img{max-width:380px;margin:0 auto}.prod-details{grid-template-columns:1fr}}
.prose .lead{font-size:1.15rem;color:var(--muted)}
.prose .box{box-shadow:none;margin:14px 0}
.prose ol,.prose ul{padding-left:22px}.prose li{margin:4px 0}
.prod{grid-template-columns:340px minmax(0,1fr)}
.prod-img{background:#fff;border:2px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:10px}
.specs{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0 18px}
.spec{font-size:.86rem;font-weight:600;padding:3px 11px;border-radius:999px;background:#fff;border:1.5px solid var(--line);color:var(--ink)}
.spec a{color:inherit;text-decoration:none}
.prod-details .wide{grid-column:1/-1}
.prod-details{margin-top:6px}
@media(max-width:900px){.prod{grid-template-columns:1fr}.prod-img{max-width:320px;margin:0 auto}}
.curr{background:#f4f8ff;border-color:#d6e2fb}.curr .facts{max-width:none;margin:6px 0 8px}.curr th{width:170px}
.parents a.card.box{text-decoration:none;color:var(--ink)}