/* Shiny English — раздел /grammar/ (упражнения). Палитра как в /wiki/. */
:root{--bg:#FBF8F3;--surface:#FFFFFF;--ink:#1A1613;--ink-soft:#5C554C;--line:#ECE6DC;
--coral:#FF5C39;--action:#B83010;--blush:#FFE6DC;--violet:#7B5CFF;--violet-50:#ECE6FF;
--ok:#1E7A46;--ok-50:#E3F4EA;--bad:#B3261E;--bad-50:#FCE8E6;
--r-lg:24px;--r-md:16px;--shadow:0 1px 2px rgba(26,22,19,.04),0 10px 28px rgba(26,22,19,.06);
--pop:0 10px 28px rgba(240,67,31,.25);--max:860px}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.0625rem/1.6 Inter,system-ui,-apple-system,"Segoe UI",sans-serif}
a{color:var(--action)}a:hover{text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:8px;background:#fff;padding:8px 12px;z-index:10}
:focus-visible{outline:3px solid var(--violet);outline-offset:2px}

header.top{border-bottom:1px solid var(--line);background:var(--surface)}
header.top .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px 18px;padding-top:14px;padding-bottom:14px}
.brand{display:flex;align-items:center;gap:8px;font-family:Unbounded,Inter,sans-serif;font-weight:700;font-size:1.05rem;color:var(--ink);text-decoration:none}
.brand .spark{color:var(--coral)}
nav.menu{display:flex;flex-wrap:wrap;gap:4px 6px}
nav.menu a{color:var(--ink-soft);font-size:.92rem;padding:5px 10px;border-radius:999px;text-decoration:none}
nav.menu a:hover{background:var(--blush);color:var(--ink)}
nav.menu a[aria-current]{background:var(--ink);color:#fff}

.crumbs{font-size:.88rem;color:var(--ink-soft);margin:22px 0 0}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:4px}
.crumbs li{margin:0}.crumbs li+li::before{content:"›";margin:0 6px 0 2px;color:#A39A8E}
.crumbs a{color:var(--ink-soft)}

main{padding:10px 0 56px}
h1{font-family:Unbounded,Inter,sans-serif;font-weight:700;font-size:clamp(1.6rem,4.4vw,2.3rem);line-height:1.15;letter-spacing:-.01em;margin:14px 0 12px}
h2{font-family:Unbounded,Inter,sans-serif;font-weight:700;font-size:clamp(1.18rem,2.8vw,1.45rem);line-height:1.25;margin:44px 0 12px}
h3{font-weight:600;font-size:1.12rem;margin:26px 0 8px}
.lead{font-size:1.12rem;color:var(--ink-soft);margin:0 0 14px}
.meta-row{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px;padding:0;list-style:none}
.meta-row li{margin:0;background:var(--violet-50);color:#3A2A99;border-radius:999px;padding:3px 12px;font-size:.85rem}
.toc{background:var(--surface);border-radius:var(--r-md);box-shadow:var(--shadow);padding:14px 18px;margin:18px 0}
.toc p{margin:0 0 6px;font-weight:600}.toc ol{margin:0;padding-left:1.2em}.toc li{margin:3px 0}
ul,ol{padding-left:1.3em}li{margin:6px 0}
.tbl{overflow-x:auto;margin:14px 0;border-radius:var(--r-md);box-shadow:var(--shadow);background:var(--surface)}
table{border-collapse:collapse;width:100%;min-width:480px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);font-size:.95rem;vertical-align:top}
th{font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft);font-weight:600}
tr:last-child td{border-bottom:0}
.formula{font-family:'JetBrains Mono',ui-monospace,monospace;font-size:.92rem;background:var(--blush);border-radius:8px;padding:2px 6px;white-space:normal}
.note{background:var(--violet-50);border-radius:var(--r-md);padding:12px 16px;margin:14px 0}
.mist{list-style:none;padding:0}
.mist li{background:var(--surface);border-radius:var(--r-md);box-shadow:var(--shadow);padding:12px 16px;margin:10px 0}
.mist .w{color:var(--bad);text-decoration:line-through;text-decoration-thickness:1px}
.mist .r{color:var(--ok);font-weight:600}

/* ---- упражнения ---- */
.ex-set{background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:18px 18px 20px;margin:22px 0}
.ex-set h3{margin-top:4px}
.ex-head{display:flex;flex-wrap:wrap;gap:6px 10px;align-items:baseline}
.lvl{font-size:.78rem;font-weight:600;background:var(--blush);color:#8A2A12;border-radius:999px;padding:2px 10px}
.ex-instr{color:var(--ink-soft);margin:4px 0 10px}
.ex-list{padding-left:1.6em;margin:0}
.ex-item{margin:0;padding:12px 0;border-bottom:1px solid var(--line)}
.ex-item:last-child{border-bottom:0}
.ex-item fieldset{border:0;margin:0;padding:0;min-width:0}
.ex-q{display:block;font-weight:500;margin:0 0 8px;padding:0}
.ex-opts{display:flex;flex-wrap:wrap;gap:8px}
.ex-opt{display:inline-flex;align-items:center;gap:6px;border:1.5px solid var(--line);border-radius:12px;padding:7px 12px;cursor:pointer;background:#fff;min-height:44px}
.ex-opt:has(input:checked){border-color:var(--violet);background:var(--violet-50)}
.ex-opt input{accent-color:var(--violet);width:18px;height:18px;margin:0}
.ex-item input[type=text]{font:inherit;width:100%;max-width:520px;padding:10px 12px;border:1.5px solid #8C8375;border-radius:12px;background:#fff;min-height:44px}
.ex-item input[type=text]:focus{border-color:var(--violet);outline:none;box-shadow:0 0 0 3px var(--violet-50)}
.ord-out,.ord-pool{display:flex;flex-wrap:wrap;gap:8px;min-height:48px;padding:6px;border-radius:12px}
.ord-out{border:1.5px dashed #CFC6B8;background:#FFFDF9;margin-bottom:6px}
.ord-out.empty::before{content:"Нажимай на слова по порядку";color:#7A7266;font-size:.9rem;align-self:center;padding-left:6px}
.ord-w{font:inherit;border:1.5px solid var(--line);background:#fff;border-radius:10px;padding:6px 12px;cursor:pointer;min-height:40px}
.ord-out .ord-w{background:var(--violet-50);border-color:#CFC3FF}
.linkish{background:none;border:0;color:var(--ink-soft);font:inherit;font-size:.88rem;text-decoration:underline;cursor:pointer;padding:4px 0}
.ex-fb{margin-top:8px;border-radius:12px;padding:10px 14px;font-size:.95rem}
.ex-fb p{margin:4px 0}
.ex-item.ok .ex-fb{background:var(--ok-50)}.ex-item.bad .ex-fb{background:var(--bad-50)}
.ex-item.ok .fb-verdict{color:var(--ok);font-weight:600}.ex-item.bad .fb-verdict{color:var(--bad);font-weight:600}
.ex-item.done input[type=text]{background:#F7F4EF}
.ex-src{font-size:.85rem;color:var(--ink-soft);margin:6px 0 0}
.ex-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.btn{display:inline-block;font:inherit;font-weight:600;border:0;cursor:pointer;background:var(--action);color:#fff;padding:12px 22px;border-radius:14px;box-shadow:var(--pop);text-decoration:none;min-height:44px}
.btn:hover{filter:brightness(1.06)}
.btn.ghost{background:#fff;color:var(--ink);box-shadow:var(--shadow);border:1.5px solid var(--line)}
.ex-result{margin-top:14px;background:var(--violet-50);border-radius:14px;padding:12px 16px}
.ex-result p{margin:4px 0}.ex-score{font-size:1.15rem}
.no-js-note{font-size:.9rem;color:var(--ink-soft)}
.js .no-js-note{display:none}
.ex-actions,.ord-reset{display:none}.js .ex-actions{display:flex}.js .ord-reset{display:inline}
details.key{margin-top:12px;font-size:.93rem}
details.key summary{cursor:pointer;color:var(--ink-soft)}
details.key ol{margin:8px 0 0}
#ex-progress{background:var(--ok-50);border-radius:12px;padding:10px 14px;margin:10px 0}

/* ---- блоки навигации ---- */
.next{display:block;background:var(--ink);color:#fff;border-radius:var(--r-lg);padding:18px 20px;text-decoration:none;margin:26px 0}
.next small{display:block;color:#CFC6B8;font-size:.82rem;letter-spacing:.04em;text-transform:uppercase}
.next b{font-family:Unbounded,Inter,sans-serif;font-size:1.1rem}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin:14px 0;padding:0;list-style:none}
.cards li{margin:0}
.card{position:relative;display:block;height:100%;background:var(--surface);border-radius:var(--r-md);box-shadow:var(--shadow);padding:14px 16px;text-decoration:none;color:var(--ink)}
.card:hover{box-shadow:0 0 0 2px var(--blush),var(--shadow)}
.card b{display:block;margin-bottom:4px}
.card span{color:var(--ink-soft);font-size:.9rem}
.card .lvl{position:static;display:inline-block;margin-top:8px}
.hub-done{display:block;margin-top:6px;color:var(--ok);font-size:.85rem;font-weight:600}
.soon{color:var(--ink-soft);font-size:.95rem}
.cta-box{background:linear-gradient(135deg,#FFF1EA,#F3EEFF);border-radius:var(--r-lg);padding:22px 20px;margin:40px 0 8px}
.cta-box h2{margin-top:0}
.faq details{background:var(--surface);border-radius:var(--r-md);box-shadow:var(--shadow);padding:12px 16px;margin:10px 0}
.faq summary{cursor:pointer;font-weight:600}
.faq details p{margin:8px 0 0}
.empty-note{background:var(--surface);border-radius:var(--r-md);padding:16px;box-shadow:var(--shadow)}
.updated{font-size:.85rem;color:var(--ink-soft);margin-top:28px}

footer{border-top:1px solid var(--line);padding:26px 0 40px;color:var(--ink-soft);font-size:.9rem;background:var(--surface)}
footer a{color:var(--ink-soft)}
footer nav{display:flex;flex-wrap:wrap;gap:6px 16px;margin:0 0 10px}
@media (max-width:520px){
  .ex-set{padding:14px 12px 16px;border-radius:18px;margin-left:-4px;margin-right:-4px}
  .ex-list{padding-left:1.3em}
  .btn{width:100%;text-align:center}
}
@media (prefers-reduced-motion:no-preference){.ex-fb{animation:fbin .18s ease-out}@keyframes fbin{from{opacity:0;transform:translateY(-2px)}to{opacity:1}}}