/* ConvertMathly — design system */
:root{
  --bg:#0a0d14; --bg2:#0e131d; --surface:#131a27; --surface2:#19223300; --card:#151d2b;
  --line:#232d40; --line2:#2d3a52; --text:#e8edf6; --muted:#97a3b8; --faint:#66728a;
  --accent:#36e2a4; --accent2:#22c3e6; --accent-ink:#04241a; --danger:#ff6b7a; --warn:#ffc35a;
  --grad:linear-gradient(120deg,#36e2a4 0%,#22c3e6 100%);
  --c-image:#ff7ab6; --c-video:#ff9f43; --c-audio:#a78bfa; --c-pdf:#ff6b6b; --c-doc:#5aa9ff;
  --c-ebook:#4fd1c5; --c-archive:#f6c344; --c-unit:#36e2a4; --c-time:#38bdf8; --c-gif:#f472b6; --c-sheet:#4ade80;
  --radius:16px; --radius-sm:10px; --shadow:0 20px 60px -20px rgba(0,0,0,.6);
  --font:"Plus Jakarta Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  color-scheme:dark;
}
:root[data-theme="light"]{
  --bg:#f6f8fb; --bg2:#eef2f7; --surface:#ffffff; --card:#ffffff; --line:#e3e8f0; --line2:#d3dbe7;
  --text:#0f1726; --muted:#55627a; --faint:#8a95a8; --accent:#10b981; --accent2:#0ea5e9; --accent-ink:#ffffff;
  --grad:linear-gradient(120deg,#10b981 0%,#0ea5e9 100%); --shadow:0 20px 50px -24px rgba(15,23,38,.25);
  color-scheme:light;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.6 var(--font);min-height:100vh;display:flex;flex-direction:column}
a{color:inherit;text-decoration:none}
img,svg,canvas,video{max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;gap:18px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.02em;white-space:nowrap}
.logo-mark{width:32px;height:32px;border-radius:9px;background:var(--grad);display:grid;place-items:center;color:var(--accent-ink);box-shadow:0 6px 18px -6px var(--accent)}
.logo-mark svg{width:18px;height:18px}
.logo b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav{display:flex;gap:2px;margin-left:12px}
.nav-item{position:relative}
.nav-btn{background:none;border:0;padding:9px 13px;border-radius:9px;color:var(--muted);font-weight:600;cursor:pointer;display:flex;align-items:center;gap:5px}
.nav-btn:hover,.nav-item:focus-within .nav-btn,.nav-item.open .nav-btn{color:var(--text);background:var(--surface)}
.nav-btn svg{width:12px;height:12px;opacity:.6}
.mega{position:absolute;top:calc(100% + 8px);left:0;min-width:560px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;display:none;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:6px 18px}
.nav-item:hover .mega,.nav-item.open .mega{display:grid}
.nav-item:hover .mega::before{content:"";position:absolute;inset:-10px 0 auto 0;height:10px}
.mega h4{margin:4px 0 6px;font-size:11px;letter-spacing:.09em;text-transform:uppercase;color:var(--faint)}
.mega a{display:block;padding:5px 8px;margin:0 -8px;border-radius:7px;color:var(--muted);font-size:14px}
.mega a:hover{background:var(--bg2);color:var(--text)}
.hdr-right{margin-left:auto;display:flex;gap:8px;align-items:center}
.search{position:relative}
.search input{width:220px;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:8px 12px 8px 34px;outline:none}
.search input:focus{border-color:var(--accent)}
.search>svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);width:15px;height:15px;color:var(--faint)}
.search-res{position:absolute;top:calc(100% + 6px);right:0;width:300px;max-height:360px;overflow:auto;background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:6px;display:none}
.search-res.show{display:block}
.search-res a{display:flex;gap:10px;align-items:center;padding:8px 10px;border-radius:8px;font-size:14px}
.search-res a:hover,.search-res a.act{background:var(--bg2)}
.icon-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--surface);display:grid;place-items:center;cursor:pointer;color:var(--muted)}
.icon-btn:hover{color:var(--text);border-color:var(--line2)}
.icon-btn svg{width:18px;height:18px}
.burger{display:none}
.mnav{display:none}

/* ---------- breadcrumbs / hero ---------- */
.crumbs{font-size:13px;color:var(--faint);padding-top:22px;display:flex;flex-wrap:wrap;gap:6px}
.crumbs a:hover{color:var(--text)}
.hero{padding:34px 0 10px;text-align:center}
.hero h1{font-size:clamp(28px,4.4vw,46px);line-height:1.12;letter-spacing:-.03em;margin:0 0 12px;font-weight:800}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{color:var(--muted);font-size:17px;max-width:680px;margin:0 auto}
.badges{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:18px 0 0}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;color:var(--muted);background:var(--surface);border:1px solid var(--line);padding:5px 11px;border-radius:99px}
.badge svg{width:13px;height:13px;color:var(--accent)}

/* ---------- tool box ---------- */
.tool{margin:26px auto 0;max-width:900px}
.drop{position:relative;border:2px dashed var(--line2);border-radius:22px;background:radial-gradient(120% 120% at 50% 0%,color-mix(in srgb,var(--accent) 7%,var(--surface)) 0%,var(--surface) 60%);padding:46px 20px;text-align:center;transition:.2s;cursor:pointer}
.drop:hover,.drop.over{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 9%,var(--surface))}
.drop-ico{width:64px;height:64px;margin:0 auto 14px;border-radius:18px;background:var(--grad);display:grid;place-items:center;color:var(--accent-ink);box-shadow:0 14px 34px -12px var(--accent)}
.drop-ico svg{width:30px;height:30px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:12px 22px;font-weight:700;cursor:pointer;transition:.15s;white-space:nowrap}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--grad);color:var(--accent-ink);box-shadow:0 10px 28px -12px var(--accent)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-ghost{background:var(--surface);border:1px solid var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--line2);background:var(--bg2)}
.btn-sm{padding:7px 12px;font-size:13px;border-radius:9px}
.btn-lg{padding:15px 30px;font-size:16px}
.drop .btn{font-size:16px;padding:14px 28px}
.drop-hint{margin-top:12px;color:var(--faint);font-size:13px}
.drop-hint b{color:var(--muted);font-weight:600}
.drop.compact{padding:18px}
.drop.compact .drop-ico,.drop.compact .drop-hint{display:none}

.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);margin-top:16px;overflow:hidden}
.panel-h{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line);font-weight:700}
.panel-h .sp{margin-left:auto}
.panel-b{padding:16px 18px}

.files{list-style:none;margin:0;padding:0}
.file{display:grid;grid-template-columns:44px 1fr auto;gap:14px;align-items:center;padding:12px 18px;border-bottom:1px solid var(--line)}
.file:last-child{border-bottom:0}
.ficon{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;font-size:10.5px;font-weight:800;letter-spacing:.03em;text-transform:uppercase;color:#fff;overflow:hidden;background:var(--line2)}
.ficon img{width:100%;height:100%;object-fit:cover}
.fname{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fmeta{font-size:12.5px;color:var(--faint);display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.fmeta .ok{color:var(--accent);font-weight:700}
.fmeta .err{color:var(--danger)}
.fact{display:flex;gap:8px;align-items:center}
.to{display:flex;align-items:center;gap:8px;color:var(--faint);font-size:13px}
select,.inp{background:var(--bg2);border:1px solid var(--line);border-radius:9px;padding:8px 11px;outline:none;min-width:0}
select:focus,.inp:focus{border-color:var(--accent)}
select{cursor:pointer;padding-right:28px;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2397a3b8'%3E%3Cpath d='M5.5 7.5 10 12l4.5-4.5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center;background-size:16px}
.x{width:32px;height:32px;border-radius:8px;border:0;background:none;color:var(--faint);cursor:pointer;display:grid;place-items:center}
.x:hover{background:var(--bg2);color:var(--danger)}
.x svg{width:16px;height:16px}
.prog{height:4px;background:var(--line);border-radius:4px;overflow:hidden;margin-top:6px}
.prog i{display:block;height:100%;width:0;background:var(--grad);transition:width .2s}
.prog.ind i{width:35%;animation:ind 1.1s infinite ease-in-out}
@keyframes ind{0%{transform:translateX(-100%)}100%{transform:translateX(300%)}}

.opts{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px 18px}
.opt label{display:block;font-size:12.5px;font-weight:700;color:var(--muted);margin-bottom:6px}
.opt .inp,.opt select{width:100%}
.opt small{display:block;color:var(--faint);font-size:12px;margin-top:5px}
.opt.full{grid-column:1/-1}
.range{display:flex;align-items:center;gap:10px}
.range input{flex:1;accent-color:var(--accent)}
.range output{min-width:44px;text-align:right;font-family:var(--mono);font-size:13px;color:var(--text)}
.chk{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text);cursor:pointer;margin-top:24px}
.chk input{width:17px;height:17px;accent-color:var(--accent)}
details.adv summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:8px;font-weight:700}
details.adv summary::-webkit-details-marker{display:none}
details.adv summary svg{width:16px;height:16px;transition:.2s}
details.adv[open] summary svg{transform:rotate(90deg)}

.actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;padding:16px 18px;border-top:1px solid var(--line);background:var(--bg2)}
.actions .note{font-size:13px;color:var(--faint)}
.results .file .fact a{white-space:nowrap}
.status{padding:12px 18px;font-size:13.5px;color:var(--muted);display:flex;gap:10px;align-items:center}
.status.err{color:var(--danger)}
.spin{width:16px;height:16px;border:2px solid var(--line2);border-top-color:var(--accent);border-radius:50%;animation:sp .8s linear infinite;flex:none}
@keyframes sp{to{transform:rotate(360deg)}}
.privacy-note{display:flex;gap:8px;justify-content:center;align-items:center;color:var(--faint);font-size:12.5px;margin-top:12px}
.privacy-note svg{width:14px;height:14px;color:var(--accent)}

/* widgets */
.stage{position:relative;display:inline-block;max-width:100%;line-height:0;user-select:none;touch-action:none}
.stage-wrap{background:repeating-conic-gradient(var(--bg2) 0 25%,var(--surface) 0 50%) 0 0/18px 18px;border-radius:12px;padding:12px;text-align:center;overflow:hidden}
.stage img,.stage video,.stage canvas{max-height:460px;max-width:100%;display:block}
.cropbox{position:absolute;border:2px solid var(--accent);box-shadow:0 0 0 9999px rgba(0,0,0,.55);cursor:move}
.cropbox i{position:absolute;width:14px;height:14px;background:var(--accent);border-radius:3px}
.cropbox i[data-h=nw]{left:-8px;top:-8px;cursor:nwse-resize}.cropbox i[data-h=ne]{right:-8px;top:-8px;cursor:nesw-resize}
.cropbox i[data-h=sw]{left:-8px;bottom:-8px;cursor:nesw-resize}.cropbox i[data-h=se]{right:-8px;bottom:-8px;cursor:nwse-resize}
.pages{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:14px}
.pg{position:relative;background:var(--bg2);border:2px solid var(--line);border-radius:12px;padding:8px;text-align:center;cursor:grab;transition:.15s}
.pg canvas{width:100%;height:auto;background:#fff;border-radius:4px;box-shadow:0 2px 8px rgba(0,0,0,.3);transition:transform .2s}
.pg .n{font-size:12px;color:var(--muted);margin-top:6px;font-weight:600}
.pg.sel{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,var(--bg2))}
.pg.del{opacity:.35}
.pg.del::after{content:"";position:absolute;inset:8px;background:linear-gradient(45deg,transparent 48%,var(--danger) 48% 52%,transparent 52%)}
.pg .pgb{position:absolute;top:6px;right:6px;display:flex;gap:4px;opacity:0;transition:.15s}
.pg:hover .pgb{opacity:1}
.pg .pgb button{width:26px;height:26px;border-radius:7px;border:0;background:rgba(0,0,0,.65);color:#fff;cursor:pointer;display:grid;place-items:center}
.pg .pgb svg{width:14px;height:14px}
.pg.drag{opacity:.4}
.pg.over{border-color:var(--accent2)}
.swatch{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.swatch .sw{width:72px;height:72px;border-radius:14px;border:1px solid var(--line2)}
.vals{display:grid;gap:8px;flex:1;min-width:240px}
.val{display:flex;align-items:center;gap:8px}
.val code{flex:1;font-family:var(--mono);background:var(--bg2);border:1px solid var(--line);padding:8px 10px;border-radius:8px}
.loupe{position:fixed;pointer-events:none;width:110px;height:110px;border-radius:50%;border:3px solid #fff;box-shadow:0 6px 20px rgba(0,0,0,.5);display:none;z-index:99;image-rendering:pixelated}

/* calculators */
.calc{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:var(--shadow)}
.calc-row{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:end}
.calc-field label{display:block;font-size:12.5px;font-weight:700;color:var(--muted);margin-bottom:6px}
.calc-field .inp{width:100%;font-size:22px;font-weight:700;padding:12px 14px;font-family:var(--mono)}
.calc-field select{width:100%;margin-top:8px}
.swap{width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:var(--bg2);cursor:pointer;display:grid;place-items:center;color:var(--accent);margin-bottom:6px}
.swap:hover{border-color:var(--accent)}
.swap svg{width:20px;height:20px}
.calc-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:18px}
.calc-tabs button{border:1px solid var(--line);background:var(--bg2);border-radius:99px;padding:6px 13px;font-size:13px;font-weight:600;color:var(--muted);cursor:pointer}
.calc-tabs button.on{background:var(--grad);color:var(--accent-ink);border-color:transparent}
.formula{margin-top:18px;padding:14px 16px;border-radius:12px;background:var(--bg2);border:1px solid var(--line);font-size:14px;color:var(--muted)}
.formula b{color:var(--text);font-family:var(--mono)}
.ctable{width:100%;border-collapse:collapse;margin-top:8px;font-size:14px}
.ctable th,.ctable td{padding:9px 12px;border-bottom:1px solid var(--line);text-align:left}
.ctable th{color:var(--faint);font-size:12px;text-transform:uppercase;letter-spacing:.06em}
.ctable td{font-family:var(--mono)}
.tz-out{font-size:28px;font-weight:800;margin-top:6px;font-family:var(--mono)}
.tz-sub{color:var(--faint);font-size:13px}

/* ---------- ad slots ---------- */
.ad{margin:26px auto;max-width:970px;min-height:90px;display:flex;align-items:center;justify-content:center;border-radius:12px}
.ad.ph{border:1px dashed var(--line);color:var(--faint);font-size:12px}

/* ---------- content ---------- */
.content{max-width:860px;margin:40px auto 0}
.content h2{font-size:26px;letter-spacing:-.02em;margin:44px 0 12px;line-height:1.25}
.content h3{font-size:18px;margin:26px 0 8px}
.content p,.content li{color:var(--muted)}
.content strong{color:var(--text)}
.content a{color:var(--accent)}
.steps{list-style:none;padding:0;margin:18px 0;display:grid;gap:12px;counter-reset:s}
.steps li{counter-increment:s;display:grid;grid-template-columns:40px 1fr;gap:14px;align-items:start;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px}
.steps li::before{content:counter(s);width:36px;height:36px;border-radius:10px;background:var(--grad);color:var(--accent-ink);display:grid;place-items:center;font-weight:800}
.steps li b{display:block;color:var(--text);margin-bottom:2px}
.fmt-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;margin:18px 0}
.fmt-card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px}
.fmt-card h3{margin:0 0 4px;display:flex;gap:10px;align-items:center}
.fmt-card .tag{font-size:11px;font-weight:800;padding:3px 8px;border-radius:6px;color:#fff}
.fmt-card p{margin:6px 0 0;font-size:14px}
.fmt-card dl{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;font-size:13px;margin:12px 0 0}
.fmt-card dt{color:var(--faint)}.fmt-card dd{margin:0;color:var(--text)}
.faq details{border:1px solid var(--line);border-radius:12px;background:var(--surface);margin-bottom:10px}
.faq summary{cursor:pointer;padding:15px 18px;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:20px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0;padding:0 18px 16px}
.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(185px,1fr));gap:14px;margin:20px 0}
.feat div{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px}
.feat svg{width:24px;height:24px;color:var(--accent)}
.feat b{display:block;margin:8px 0 4px}
.feat p{margin:0;font-size:14px}

/* tool grids */
.sec{margin-top:56px}
.sec-h{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:16px}
.sec-h h2{margin:0;font-size:24px;letter-spacing:-.02em}
.sec-h a{color:var(--accent);font-weight:600;font-size:14px}
.tgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.tcard{display:flex;gap:12px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px;transition:.15s}
.tcard:hover{border-color:var(--line2);transform:translateY(-2px);box-shadow:var(--shadow)}
.tcard .ti{flex:none;width:40px;height:40px;border-radius:11px;display:grid;place-items:center;color:#fff}
.tcard .ti svg{width:20px;height:20px}
.tcard b{display:block;font-size:14.5px;line-height:1.3}
.tcard span{display:block;font-size:12.5px;color:var(--faint);margin-top:3px;line-height:1.4}
.cats{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;margin-top:30px}
.cat{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px;display:flex;flex-direction:column;gap:10px;transition:.15s}
.cat:hover{border-color:var(--line2);transform:translateY(-2px)}
.cat .ti{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;color:#fff}
.cat .ti svg{width:22px;height:22px}
.cat b{font-size:15px}.cat span{font-size:12.5px;color:var(--faint)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips a{border:1px solid var(--line);background:var(--surface);border-radius:99px;padding:6px 13px;font-size:13px;color:var(--muted)}
.chips a:hover{color:var(--text);border-color:var(--accent)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:34px}
.stats div{text-align:center;padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}
.stats b{display:block;font-size:28px;letter-spacing:-.02em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stats span{font-size:13px;color:var(--faint)}
.page-legal{max-width:820px;margin:30px auto 0}
.page-legal h1{font-size:36px;letter-spacing:-.02em}
.page-legal h2{font-size:21px;margin-top:30px}
.page-legal p,.page-legal li{color:var(--muted)}
.page-legal a{color:var(--accent)}

/* ---------- footer ---------- */
.ftr{margin-top:80px;border-top:1px solid var(--line);background:var(--bg2);padding:46px 0 28px}
.fgrid{display:grid;grid-template-columns:1.4fr repeat(5,1fr);gap:26px}
.fgrid h5{margin:0 0 12px;font-size:12px;letter-spacing:.09em;text-transform:uppercase;color:var(--faint)}
.fgrid a{display:block;color:var(--muted);font-size:14px;padding:3px 0}
.fgrid a:hover{color:var(--text)}
.fgrid p{color:var(--faint);font-size:13.5px;max-width:280px}
.fbot{margin-top:34px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--faint);font-size:13px}
.fbot a:hover{color:var(--text)}
main{flex:1}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--surface);border:1px solid var(--line2);padding:11px 18px;border-radius:12px;box-shadow:var(--shadow);opacity:0;transition:.25s;z-index:100;font-size:14px}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media (max-width:1020px){
  .nav,.search{display:none}
  .burger{display:grid}
  .mnav.open{display:block;position:fixed;inset:64px 0 0;background:var(--bg);overflow:auto;z-index:49;padding:16px 20px 40px}
  .mnav input{width:100%;margin-bottom:14px}
  .mnav details{border-bottom:1px solid var(--line)}
  .mnav summary{padding:14px 0;font-weight:700;cursor:pointer}
  .mnav h4{font-size:11px;letter-spacing:.09em;text-transform:uppercase;color:var(--faint);margin:10px 0 4px}
  .mnav a{display:block;padding:7px 0;color:var(--muted)}
  .fgrid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .file{grid-template-columns:40px 1fr;padding:12px 14px}
  .file .fact{grid-column:1/-1;justify-content:flex-end}
  .ficon{width:40px;height:40px}
  .drop{padding:34px 14px}
  .calc-row{grid-template-columns:1fr}
  .swap{margin:0 auto;transform:rotate(90deg)}
  .calc{padding:18px}
  .actions{flex-direction:column;align-items:stretch}
  .actions .btn{width:100%}
  .mega{display:none!important}
}