/* ============ Eng-Topic 2.0 design system ============ */
:root{
  --bg:#f6f7fb; --surface:#ffffff; --surface2:#eef1f8;
  --ink:#101828; --muted:#5b6478; --line:#e3e7f0;
  --primary:#4f46e5; --primary-ink:#ffffff; --ai:#7c3aed;
  --ok:#10b981; --warn:#f59e0b;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 4px 16px rgba(16,24,40,.06);
  --shadow-lg:0 8px 32px rgba(16,24,40,.12);
  --r:14px; --r-sm:10px;
  --c:#4f46e5; /* category accent, overridden inline */
}
[data-theme="dark"]{
  --bg:#0b1120; --surface:#131c31; --surface2:#1b2740;
  --ink:#e6eaf3; --muted:#94a0b8; --line:#243352;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 4px 16px rgba(0,0,0,.35);
  --shadow-lg:0 8px 32px rgba(0,0,0,.5);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;line-height:1.65;
}
img,svg{max-width:100%;height:auto}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.25;margin:0 0 .5em}
h1{font-size:clamp(1.5rem,4.2vw,2.3rem);letter-spacing:-.02em}
h2{font-size:clamp(1.2rem,3vw,1.55rem);letter-spacing:-.01em}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
.hide-mobile{display:inline-flex}
kbd{background:var(--surface2);border:1px solid var(--line);border-radius:6px;padding:1px 7px;font-size:.8em;font-family:inherit}
::selection{background:rgba(79,70,229,.18)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;border:none;cursor:pointer;
  font:inherit;font-weight:600;border-radius:var(--r-sm);padding:10px 18px;transition:.15s;
  text-decoration:none}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn svg{width:18px;height:18px;flex:none}
.btn-primary{background:var(--primary);color:var(--primary-ink);box-shadow:var(--shadow)}
.btn-primary:hover{background:#4338ca;color:#fff}
.btn-ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
  border-radius:var(--r-sm);border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;transition:.15s}
.icon-btn:hover{border-color:var(--primary);color:var(--primary)}
.icon-btn svg{width:20px;height:20px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--surface) 88%,transparent);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:16px;height:64px}
.logo{display:flex;align-items:center;gap:9px;color:var(--ink);font-weight:800;font-size:1.15rem;letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo-mark{display:inline-flex;width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--ai));color:#fff;align-items:center;justify-content:center}
.logo-mark svg{width:19px;height:19px}
.logo-text i{font-style:normal;color:var(--ai)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{display:inline-flex;align-items:center;gap:7px;padding:9px 13px;border-radius:var(--r-sm);
  color:var(--ink);font-weight:600;font-size:.95rem;background:none;border:none;cursor:pointer;font-family:inherit}
.nav-link:hover{background:var(--surface2);text-decoration:none}
.nav-link .ic svg{width:17px;height:17px;display:block}
.nav-ai{color:var(--ai)}
.nav-cta{color:var(--primary)}
.caret{font-size:.7em;opacity:.6}
.nav-drop{position:relative}
.drop-menu{position:absolute;top:calc(100% + 6px);left:0;min-width:230px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow-lg);padding:8px;
  display:none;grid-template-columns:1fr;gap:2px}
.nav-drop.open .drop-menu{display:grid}
.drop-menu a{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;color:var(--ink);font-weight:500}
.drop-menu a:hover{background:var(--surface2);text-decoration:none}
.drop-menu .ic{display:inline-flex;width:26px;height:26px;border-radius:7px;background:color-mix(in srgb,var(--c) 14%,transparent);color:var(--c);align-items:center;justify-content:center}
.drop-menu .ic svg{width:15px;height:15px}
.header-actions{display:flex;gap:8px}
.burger{display:none;flex-direction:column;gap:4px}
.burger span{width:18px;height:2px;background:currentColor;border-radius:2px;transition:.2s}
.progress-bar{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--primary),var(--ai));z-index:60}

/* ---------- hero ---------- */
.hero{padding:52px 0 44px;
  background:radial-gradient(1000px 420px at 60% -80px,color-mix(in srgb,var(--primary) 13%,transparent),transparent)}
.hero-grid{display:grid;grid-template-columns:1fr 460px;gap:44px;align-items:center}
.hero-photo picture{display:block}
.hero-photo img{width:100%;height:auto;border-radius:20px;box-shadow:var(--shadow-lg);
  aspect-ratio:3/2;object-fit:cover}
.hero h1{font-size:clamp(1.8rem,5vw,3rem);margin:0 0 .4em}
.hl{background:linear-gradient(120deg,var(--primary),var(--ai));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{color:var(--muted);max-width:560px;margin:0 0 24px;font-size:1.06rem}
.hero-search{display:flex;align-items:center;gap:12px;width:min(520px,100%);margin:0 0 20px;
  padding:14px 18px;border-radius:16px;border:1px solid var(--line);background:var(--surface);
  color:var(--muted);font:inherit;cursor:pointer;box-shadow:var(--shadow);transition:.15s}
.hero-search:hover{border-color:var(--primary)}
.hero-search svg{width:20px;height:20px;flex:none;color:var(--primary)}
.hero-search span{flex:1;text-align:left}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-actions .btn svg{width:18px;height:18px}

/* ---------- cards & grids ---------- */
.sec-title{margin:40px 0 18px}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px}
.cat-card{display:flex;flex-direction:column;gap:8px;padding:18px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r);color:var(--ink);transition:.15s;position:relative;overflow:hidden}
.cat-card::after{content:"";position:absolute;inset:auto 0 0 0;height:3px;background:var(--c);opacity:0;transition:.15s}
.cat-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--c) 45%,var(--line))}
.cat-card:hover::after{opacity:1}
.cat-ic{display:inline-flex;width:42px;height:42px;border-radius:11px;align-items:center;justify-content:center;
  background:color-mix(in srgb,var(--c) 13%,transparent);color:var(--c)}
.cat-ic svg{width:22px;height:22px}
.cat-name{font-weight:700}
.cat-count{color:var(--muted);font-size:.86rem}
.cat-card-ai{background:linear-gradient(135deg,color-mix(in srgb,var(--ai) 9%,var(--surface)),var(--surface))}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.topic-card{display:flex;align-items:center;gap:12px;padding:13px 15px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r);color:var(--ink);transition:.15s}
.topic-card:hover{text-decoration:none;border-color:color-mix(in srgb,var(--c) 50%,var(--line));box-shadow:var(--shadow);transform:translateY(-1px)}
.card-ic{display:inline-flex;flex:none;width:36px;height:36px;border-radius:9px;align-items:center;justify-content:center;
  background:color-mix(in srgb,var(--c) 12%,transparent);color:var(--c)}
.card-ic svg{width:18px;height:18px}
.card-body{display:flex;flex-direction:column;min-width:0;flex:1}
.card-title{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.card-sub{color:var(--muted);font-size:.84rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lvl{flex:none;font-size:.72rem;font-weight:800;padding:3px 8px;border-radius:99px;letter-spacing:.02em}
.lvl-a1{background:#d1fae5;color:#065f46}.lvl-a2{background:#ccfbf1;color:#115e59}
.lvl-b1{background:#e0e7ff;color:#3730a3}.lvl-b2{background:#ede9fe;color:#5b21b6}
[data-theme="dark"] .lvl-a1{background:#064e3b;color:#a7f3d0}
[data-theme="dark"] .lvl-a2{background:#134e4a;color:#99f6e4}
[data-theme="dark"] .lvl-b1{background:#312e81;color:#c7d2fe}
[data-theme="dark"] .lvl-b2{background:#4c1d95;color:#ddd6fe}

/* ---------- AI strip (home) ---------- */
.ai-strip-wrap{margin-top:44px}
.ai-strip{border-radius:20px;padding:30px;color:#fff;
  background:linear-gradient(135deg,#312e81 0%,#5b21b6 55%,#7c3aed 100%);box-shadow:var(--shadow-lg)}
.ai-strip-badge{display:inline-flex;align-items:center;gap:7px;background:rgba(255,255,255,.16);
  padding:5px 12px;border-radius:99px;font-size:.82rem;font-weight:700;margin-bottom:10px}
.ai-strip-badge svg{width:15px;height:15px}
.ai-strip-head h2{color:#fff}
.ai-strip-head p{color:rgba(255,255,255,.82);max-width:640px;margin-top:6px}
.ai-strip-top{display:grid;grid-template-columns:1fr 260px;gap:28px;align-items:center}
.ai-strip-photo img{width:100%;height:auto;border-radius:16px;aspect-ratio:1/1;object-fit:cover;
  box-shadow:0 8px 28px rgba(0,0,0,.3)}
.ai-strip-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin-top:22px}
.ai-card{display:flex;flex-direction:column;gap:6px;padding:16px;border-radius:14px;color:#fff;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);transition:.15s}
.ai-card:hover{background:rgba(255,255,255,.16);text-decoration:none;transform:translateY(-2px)}
.ai-card b{font-size:.98rem}
.ai-card span{color:rgba(255,255,255,.75);font-size:.86rem;line-height:1.45}

/* ---------- how steps ---------- */
.how-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.how-step{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.how-n{display:inline-flex;width:30px;height:30px;border-radius:9px;background:var(--primary);color:#fff;
  align-items:center;justify-content:center;font-weight:800;margin-bottom:10px}
.how-step b{display:block;margin-bottom:4px}
.how-step p{margin:0;color:var(--muted);font-size:.92rem}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:18px 0 6px;color:var(--muted);font-size:.87rem}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs a:hover{color:var(--primary)}
.crumb-here{color:var(--ink);font-weight:600}

/* ---------- topic page ---------- */
.topic{padding-bottom:48px}
.topic-head{display:flex;gap:16px;align-items:flex-start;margin:10px 0 18px}
.topic-head-ic{flex:none;display:inline-flex;width:52px;height:52px;border-radius:14px;align-items:center;justify-content:center;
  background:color-mix(in srgb,var(--c) 13%,transparent);color:var(--c)}
.topic-head-ic svg{width:26px;height:26px}
.meta-row{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;color:var(--muted);font-size:.88rem;margin-top:6px}
.meta-item{display:inline-flex;align-items:center;gap:5px}
.meta-cat{color:var(--c);font-weight:600}
.action-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;
  position:sticky;top:64px;z-index:10;background:color-mix(in srgb,var(--bg) 92%,transparent);
  backdrop-filter:blur(10px);padding:10px 0;border-bottom:1px solid var(--line);margin-bottom:20px}
.view-tabs{display:inline-flex;background:var(--surface2);border-radius:var(--r-sm);padding:3px;gap:2px}
.vt{border:none;background:none;font:inherit;font-weight:600;font-size:.88rem;color:var(--muted);
  padding:7px 14px;border-radius:8px;cursor:pointer;transition:.12s}
.vt.active{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}
.action-btns{display:flex;gap:8px}
.action-btns .btn{padding:8px 13px;font-size:.88rem}
.topic-body{max-width:760px}
.para-pair{margin-bottom:18px;border-left:3px solid color-mix(in srgb,var(--c) 30%,transparent);
  padding-left:16px;border-radius:2px}
.p-en{margin:0 0 6px;font-size:1.06rem}
.p-ru{margin:0;color:var(--muted);font-size:.95rem}
.mode-en .p-ru{display:none}
.mode-ru .p-en{display:none}
.variant-h2{margin-top:34px;padding-top:18px;border-top:1px solid var(--line)}
.speaking .p-en{background:color-mix(in srgb,var(--warn) 14%,transparent)}

/* ---------- vocab ---------- */
.vocab{margin-top:38px}
.vocab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:10px}
.vocab-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);padding:12px 14px;
  display:flex;flex-direction:column;gap:2px}
.v-en{font-weight:700}
.v-tr{color:var(--c);font-size:.84rem;font-family:Consolas,Menlo,monospace}
.v-ru{color:var(--muted);font-size:.92rem}

/* ---------- phrases table / prose tables ---------- */
.phrases{margin-top:38px}
table{width:100%;border-collapse:collapse;background:var(--surface);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:.95rem}
th{background:var(--surface2);font-weight:700}
tr:last-child td{border-bottom:none}
.table-wrap{overflow-x:auto;border-radius:var(--r)}

/* ---------- faq ---------- */
.faq{margin-top:38px;max-width:760px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);margin-bottom:8px;overflow:hidden}
.faq-item summary{padding:13px 16px;font-weight:600;cursor:pointer;list-style:none;position:relative;padding-right:40px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);
  font-size:1.3em;color:var(--muted);transition:.15s}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-item p{margin:0;padding:0 16px 14px;color:var(--muted)}

/* ---------- cta generator ---------- */
.cta-gen{display:flex;gap:16px;align-items:center;margin-top:38px;padding:20px;border-radius:var(--r);
  background:linear-gradient(135deg,color-mix(in srgb,var(--ai) 10%,var(--surface)),var(--surface));
  border:1px solid color-mix(in srgb,var(--ai) 25%,var(--line))}
.cta-ic{flex:none;display:inline-flex;width:46px;height:46px;border-radius:12px;background:var(--ai);color:#fff;
  align-items:center;justify-content:center}
.cta-ic svg{width:23px;height:23px}
.cta-body p{margin:0 0 10px}

/* ---------- related / author ---------- */
.related{margin-top:44px}
.author-box{display:flex;gap:14px;margin-top:44px;padding:18px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r)}
.author-ava{flex:none;display:inline-flex;width:48px;height:48px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--ai));color:#fff;align-items:center;justify-content:center}
.author-ava svg{width:24px;height:24px}
.author-name{margin:0 0 4px;font-weight:700}
.author-bio{margin:0;color:var(--muted);font-size:.92rem}

/* ---------- hub ---------- */
.hub{padding-bottom:48px}
.hub-cover{margin:10px 0 22px;border-radius:18px;overflow:hidden;position:relative;box-shadow:var(--shadow)}
.hub-cover img{width:100%;height:clamp(150px,26vw,260px);object-fit:cover;display:block}
.hub-cover::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 45%,color-mix(in srgb,var(--c) 30%,transparent) 100%);
  pointer-events:none}
.hub-head{display:flex;gap:18px;align-items:flex-start;margin:12px 0 22px}
.hub-head-ic{flex:none;display:inline-flex;width:60px;height:60px;border-radius:16px;align-items:center;justify-content:center;
  background:color-mix(in srgb,var(--c) 13%,transparent);color:var(--c)}
.hub-head-ic svg{width:30px;height:30px}
.hub-lead{color:var(--muted);max-width:680px;margin:4px 0 14px}
.stat-row{display:flex;flex-wrap:wrap;gap:10px}
.stat{display:flex;flex-direction:column;padding:10px 18px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm)}
.stat b{font-size:1.15rem}
.stat span{color:var(--muted);font-size:.8rem}
.hub-filter{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-sm);padding:4px 14px;margin-bottom:16px;max-width:480px}
.hub-filter svg{width:18px;height:18px;color:var(--muted);flex:none}
.hub-filter input{flex:1;border:none;background:none;font:inherit;color:var(--ink);padding:9px 0;outline:none}
.hub-count{color:var(--muted);font-size:.85rem;font-weight:600}
.hub-content{margin-top:36px}
.prose{max-width:760px}
.prose h2{margin-top:1.6em}
.prose img{border-radius:var(--r)}
.prose blockquote{margin:1.2em 0;padding:12px 18px;border-left:3px solid var(--primary);
  background:var(--surface);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--muted)}

/* ---------- article ---------- */
.article{padding-bottom:48px}
.article-head{margin:10px 0 20px}
.tldr{margin-top:16px;padding:14px 18px;border-radius:var(--r-sm);background:color-mix(in srgb,var(--c) 8%,var(--surface));
  border:1px solid color-mix(in srgb,var(--c) 22%,var(--line))}
.article-photo,.topic-photo{max-width:760px;margin:0 0 24px;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
.article-photo img,.topic-photo img{width:100%;display:block;object-fit:cover}
.article-photo img{height:clamp(180px,30vw,320px)}
.topic-photo img{height:clamp(150px,24vw,240px)}
.topic-photo{margin-top:4px}
.chart-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;margin:1.4em 0}
.chart-box figcaption{color:var(--muted);font-size:.85rem;margin-top:10px}
.chart-src{font-size:.78rem;color:var(--muted)}

/* ---------- tool / generator ---------- */
.tool{padding-bottom:48px}
.tool-head{margin:10px 0 20px}
.tool-badge{display:inline-flex;align-items:center;gap:7px;background:color-mix(in srgb,var(--ai) 12%,transparent);
  color:var(--ai);padding:5px 12px;border-radius:99px;font-size:.82rem;font-weight:700;margin-bottom:10px}
.tool-badge svg{width:15px;height:15px}
.gen-app{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--shadow)}
.gen-step-title{font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.gen-step-n{display:inline-flex;width:26px;height:26px;border-radius:8px;background:var(--ai);color:#fff;
  align-items:center;justify-content:center;font-size:.85rem;font-weight:800;flex:none}
.gen-field{margin-bottom:14px}
.gen-field label{display:block;font-weight:600;font-size:.92rem;margin-bottom:5px}
.gen-field input[type=text],.gen-field select{width:100%;padding:10px 12px;border:1px solid var(--line);
  border-radius:var(--r-sm);background:var(--bg);color:var(--ink);font:inherit;outline:none}
.gen-field input:focus,.gen-field select:focus{border-color:var(--ai)}
.gen-checks{display:flex;flex-wrap:wrap;gap:8px}
.gen-checks label{display:inline-flex;align-items:center;gap:7px;padding:8px 13px;border:1px solid var(--line);
  border-radius:99px;cursor:pointer;font-size:.9rem;transition:.12s;font-weight:500}
.gen-checks label:has(input:checked){border-color:var(--ai);background:color-mix(in srgb,var(--ai) 10%,transparent);color:var(--ai)}
.gen-checks input{accent-color:var(--ai)}
.gen-nav{display:flex;gap:10px;margin-top:18px}
.gen-output{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:18px 0}
.gen-col h3{font-size:1rem;color:var(--muted)}
.gen-col div{white-space:pre-wrap}
.gen-result-title{margin:0}
.notice{padding:12px 16px;background:color-mix(in srgb,var(--warn) 12%,var(--surface));border-radius:var(--r-sm)}

/* ---------- search overlay ---------- */
.search-overlay{position:fixed;inset:0;z-index:100;background:rgba(10,14,28,.55);backdrop-filter:blur(4px);
  display:flex;align-items:flex-start;justify-content:center;padding:8vh 16px}
.search-overlay[hidden]{display:none}
.search-box{width:min(640px,100%);background:var(--surface);border-radius:18px;box-shadow:var(--shadow-lg);
  padding:18px;max-height:76vh;display:flex;flex-direction:column}
.search-input-row{display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);padding-bottom:12px}
.search-input-row svg{width:20px;height:20px;color:var(--primary);flex:none}
.search-input-row input{flex:1;border:none;background:none;font:inherit;font-size:1.05rem;color:var(--ink);outline:none}
.search-hint{color:var(--muted);font-size:.8rem;padding:8px 2px}
.search-results{list-style:none;margin:6px 0 0;padding:0;overflow-y:auto}
.search-results li a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--r-sm);color:var(--ink)}
.search-results li a:hover,.search-results li.sel a{background:var(--surface2);text-decoration:none}
.search-results .sr-en{color:var(--muted);font-size:.85rem}
.search-results .sr-cat{margin-left:auto;font-size:.75rem;color:var(--muted);flex:none}

/* ---------- footer ---------- */
.site-footer{margin-top:64px;border-top:1px solid var(--line);background:var(--surface)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px;padding:36px 20px}
.footer-col h3{font-size:.9rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:10px}
.footer-col a{display:block;color:var(--ink);padding:3px 0;font-size:.93rem}
.footer-col a:hover{color:var(--primary)}
.footer-brand p{color:var(--muted);font-size:.9rem;margin-top:10px}
.footer-bottom{padding:14px 20px;border-top:1px solid var(--line);color:var(--muted);font-size:.83rem}

/* ---------- 404 ---------- */
.err404{text-align:center;padding:70px 20px}
.err-code{font-size:5rem;font-weight:800;margin:0;background:linear-gradient(120deg,var(--primary),var(--ai));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.err-actions{display:flex;gap:12px;justify-content:center;margin:22px 0}
.err-links{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:28px;text-align:center}
  .hero-sub{margin-left:auto;margin-right:auto}
  .hero-search{margin-left:auto;margin-right:auto}
  .hero-actions{justify-content:center}
  .hero-photo{max-width:520px;margin:0 auto}
}
@media (max-width:860px){
  .ai-strip-top{grid-template-columns:1fr}
  .ai-strip-photo{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
  .gen-output{grid-template-columns:1fr}
  .main-nav{position:fixed;top:64px;right:0;bottom:0;width:min(320px,86vw);background:var(--surface);
    border-left:1px solid var(--line);flex-direction:column;align-items:stretch;padding:18px;gap:6px;
    transform:translateX(100%);transition:.22s;overflow-y:auto;margin-left:0;box-shadow:var(--shadow-lg)}
  .main-nav.open{transform:none}
  .burger{display:inline-flex}
  .drop-menu{position:static;display:grid;box-shadow:none;border:none;padding:0 0 0 12px;background:none}
  .drop-toggle{display:none}
  .hide-mobile{display:none}
  .action-bar{top:63px}
}
@media (max-width:560px){
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .card-grid{grid-template-columns:1fr}
  .topic-head-ic{display:none}
  .stat-row .stat{padding:8px 12px}
  .ai-strip{padding:22px}
  .action-btns .btn span{display:none}
  .action-btns .btn{padding:8px 10px}
}

/* ---------- print ---------- */
@media print{
  .site-header,.site-footer,.action-bar,.related,.author-box,.cta-gen,.faq,.breadcrumbs,
  .progress-bar,.search-overlay,.hub-filter,.gen-form,.gen-nav,#genAgain,.hero-actions,.err-actions,
  .topic-photo,.article-photo,.hub-cover,.hero-photo,.ai-strip-photo{display:none!important}
  body{background:#fff;color:#000;font-size:12pt}
  .container{max-width:100%;padding:0}
  .para-pair{border-left:none;padding-left:0}
  .p-ru{color:#444}
  .mode-en .p-ru{display:none}
  .mode-ru .p-en{display:none}
  .vocab-card{border:1px solid #ccc;break-inside:avoid}
  a{color:#000;text-decoration:none}
}