*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f0f2f8;--surface:#ffffff;--surface2:#f7f8fc;--border:#e2e6f0;
  --text:#0f1629;--muted:#6b7592;--dim:#9ba4be;
  --accent:#2563eb;--accent-bg:#eff6ff;--accent-border:#bfdbfe;
  --green:#059669;--green-bg:#ecfdf5;--red:#dc2626;--red-bg:#fef2f2;
  --orange:#d97706;--orange-bg:#fffbeb;
  --r:10px;--r-sm:7px;
  --shadow:0 1px 3px rgba(15,22,41,.07),0 4px 16px rgba(15,22,41,.06);
  --shadow-md:0 4px 8px rgba(15,22,41,.08),0 12px 32px rgba(15,22,41,.1);
}
body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;font-size:14px;line-height:1.6}

/* ── iOS app badge (permanent, top-right corner) ── */
.ios-app-badge{
  position:fixed;top:12px;right:18px;z-index:70;
  display:flex;align-items:center;gap:7px;background:#0d0d0f;color:#fff;
  padding:5px 12px 5px 5px;border-radius:20px;text-decoration:none;
  box-shadow:0 4px 14px rgba(0,0,0,.22);transition:transform .15s,box-shadow .15s
}
.ios-app-badge:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(0,0,0,.28)}
.ios-app-badge-icon{
  width:22px;height:22px;border-radius:6px;flex-shrink:0;background:linear-gradient(135deg,#2563eb,#7c3aed);
  display:flex;align-items:center;justify-content:center;font-size:12px
}
.ios-app-badge-name{font-size:12px;font-weight:700;white-space:nowrap}

/* ── Top navigation ── */
.topnav{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:60}
.topnav-inner{display:flex;align-items:center;gap:6px;padding:0 20px;height:56px;max-width:1280px;margin:0 auto}
.topnav-logo{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:800;color:var(--text);text-decoration:none;margin-right:6px}
.logo-box{width:30px;height:30px;border-radius:8px;flex-shrink:0;display:block}
.topnav-logo-text{white-space:nowrap}
.topnav-link{
  padding:8px 12px;border:none;background:none;border-radius:var(--r-sm);cursor:pointer;
  font-family:inherit;font-size:13.5px;font-weight:600;color:var(--text);text-decoration:none;
  display:flex;align-items:center;gap:4px;white-space:nowrap
}
.topnav-link:hover{background:var(--bg)}
.topnav-spacer{flex:1}

/* Tools dropdown */
.topnav-dropdown{position:relative}
.topnav-dropdown-btn .caret{font-size:10px}
.topnav-dropdown-menu{
  display:none;position:absolute;top:calc(100% + 6px);left:0;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow-md);
  width:640px;max-width:calc(100vw - 40px);max-height:75vh;overflow-y:auto;
  padding:10px;z-index:70;grid-template-columns:repeat(3,1fr);gap:1px 6px
}
.topnav-dropdown-menu.open{display:grid}
.topnav-dropdown-menu a{
  display:block;padding:8px 10px;border-radius:var(--r-sm);font-size:13.5px;color:var(--text);
  text-decoration:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis
}
.topnav-dropdown-menu a:hover{background:var(--bg)}
.topnav-dropdown-sep{height:1px;background:var(--border);margin:6px 2px}
.topnav-dropdown-sep-full{grid-column:1/-1}
.topnav-dropdown-all{grid-column:1/-1;font-weight:700;color:var(--accent)}

/* Search */
.topnav-search{position:relative;flex-shrink:1;min-width:0;max-width:320px;width:100%}
.topnav-search input{
  width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:20px;
  font-family:inherit;font-size:13px;background:var(--bg);outline:none;color:var(--text);
  transition:border-color .2s
}
.topnav-search input:focus{border-color:var(--accent);background:#fff}
.topnav-search-results{
  display:none;position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow-md);
  max-height:340px;overflow-y:auto;padding:6px;z-index:70
}
.topnav-search-results.open{display:block}
.topnav-search-results a{display:block;padding:8px 10px;border-radius:var(--r-sm);font-size:13px;color:var(--text);text-decoration:none}
.topnav-search-results a:hover{background:var(--bg)}
.topnav-search-empty{padding:8px 10px;font-size:12.5px;color:var(--muted)}

/* Auth buttons */
.topnav-btn{padding:8px 16px;border-radius:20px;font-size:13px;font-weight:700;text-decoration:none;white-space:nowrap}
.topnav-btn-ghost{border:1px solid var(--border);color:var(--text)}
.topnav-btn-ghost:hover{background:var(--bg)}
.topnav-btn-primary{background:var(--accent);color:#fff}
.topnav-btn-primary:hover{background:#1d4ed8}

.topnav-burger{
  display:none;width:34px;height:34px;border:1px solid var(--border);border-radius:var(--r-sm);
  background:var(--surface);cursor:pointer;align-items:center;justify-content:center;font-size:16px;flex-shrink:0
}
.topnav-mobile{display:none;flex-direction:column;padding:8px 16px 14px;border-top:1px solid var(--border)}
.topnav-mobile.open{display:flex}
.topnav-mobile a{padding:9px 4px;font-size:14px;color:var(--text);text-decoration:none}
.topnav-mobile a:hover{color:var(--accent)}

/* Breadcrumbs */
.breadcrumbs{border-bottom:1px solid var(--border);background:var(--surface2)}
.breadcrumbs-inner{max-width:1280px;margin:0 auto;padding:10px 20px;font-size:12.5px;color:var(--muted)}
.breadcrumbs-inner a{color:var(--muted);text-decoration:none}
.breadcrumbs-inner a:hover{color:var(--accent)}
.breadcrumbs-inner span{margin:0 6px}
.breadcrumbs-inner .current{color:var(--text);font-weight:600}

/* ── Main ── */
.page{display:flex;flex-direction:column;min-height:calc(100vh - 56px)}
.content{padding:24px 28px;flex:1;max-width:1280px;margin:0 auto;width:100%}

/* ── Panel ──
   Every page now renders exactly one panel (no more single-page-app
   swapping between 71 in-DOM panels), so panels are visible by default
   — no display:none — which matters for SEO/no-JS visitors. The
   .active class (still added by show() on load) just keeps the subtle
   entrance animation. */
.panel{display:block}
.panel.active{animation:fadeUp .2s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}

/* Calculator pages read as one centered column (title, description,
   the form card, related tools) — matches every other page type
   (home, category grids) staying full-width via .card-wide/.wide. */
.panel-title{font-size:21px;font-weight:800;margin-bottom:3px;max-width:640px;margin-left:auto;margin-right:auto}
.panel-desc{font-size:13.5px;color:var(--muted);margin-bottom:20px;max-width:640px;margin-left:auto;margin-right:auto}

/* ── About this calculator (DB-backed long description) ── */
.calc-long-desc{max-width:640px;margin:6px auto 0}
.calc-long-desc:empty{display:none}
.calc-long-desc-label{font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin-bottom:6px}
.calc-long-desc p{font-size:13.5px;color:var(--muted);line-height:1.7}

/* ── Related calculators ── */
.related-calcs{max-width:640px;margin:20px auto 0}
.related-calcs-label{font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin-bottom:10px}
.related-calcs-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px}

/* ── Cards ── */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:22px;box-shadow:var(--shadow);margin:0 auto 14px;max-width:640px}
.card.card-wide{max-width:none;margin-left:0;margin-right:0}

/* ── Form ── */
.grid{display:grid;gap:14px}
.g2{grid-template-columns:1fr 1fr}
.g3{grid-template-columns:1fr 1fr 1fr}
.field label{display:block;font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin-bottom:5px}
.field input,.field select{
  width:100%;padding:9px 12px;border:1.5px solid var(--border);border-radius:var(--r-sm);
  font-family:inherit;font-size:14px;background:var(--bg);color:var(--text);outline:none;
  transition:border-color .2s,background .2s
}
.field input:focus,.field select:focus{border-color:var(--accent);background:#fff}
/* Standalone fields (not inside a .grid) don't need to stretch the full card width */
.card > .field input,.card > .field select{max-width:280px}
.card > .field.field-wide input,.card > .field.field-wide select{max-width:none}

.radio-row{display:flex;gap:6px;flex-wrap:wrap}
.rbtn{padding:6px 13px;border:1.5px solid var(--border);border-radius:6px;cursor:pointer;font-size:13px;font-family:inherit;background:var(--bg);color:var(--text);transition:all .15s}
.rbtn.on{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}

.btn-row{display:flex;gap:8px;margin-top:4px;flex-wrap:wrap;align-items:center}
.btn{padding:9px 20px;border-radius:var(--r-sm);border:none;cursor:pointer;font-family:inherit;font-size:13.5px;font-weight:600;transition:all .15s;display:inline-flex;align-items:center;gap:5px}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#1d4ed8;box-shadow:0 3px 10px rgba(37,99,235,.35);transform:translateY(-1px)}
.btn-ghost{background:var(--bg);color:var(--muted);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--border)}
.btn.btn-block{width:100%;justify-content:center}

/* ── Simple pages (auth forms, plain alerts) ── */
.alert{background:var(--red-bg);color:var(--red);border-radius:var(--r-sm);padding:9px 12px;font-size:13px;margin-bottom:14px}
.alert.ok{background:var(--green-bg);color:var(--green)}
.foot-link{text-align:center;font-size:13px;color:var(--muted);margin-top:16px}
.foot-link a{color:var(--accent);text-decoration:none;font-weight:600}
.page-narrow{display:flex;justify-content:center;padding-top:24px}
.page-narrow .card{width:100%;max-width:400px}

/* ── Category boxes ── */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px;margin-top:16px}
.cat-tile{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:16px;text-decoration:none;color:var(--text);box-shadow:var(--shadow);transition:all .15s}
.cat-tile:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--accent)}
.cat-tile b{display:flex;align-items:center;gap:8px;font-size:14px;margin-bottom:2px}
.cat-tile span{font-size:12px;color:var(--muted)}
.cat-tile-icon{font-size:18px;line-height:1;flex-shrink:0}
.card.wide{max-width:none}

/* ── Results ── */
.result{display:none;margin-top:14px;border-radius:var(--r);padding:16px 18px;border:1.5px solid var(--accent-border);background:var(--accent-bg)}
.result.show{display:block}
.result.err{border-color:#fecaca;background:var(--red-bg)}
.result-tag{font-size:10.5px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--accent);margin-bottom:8px}
.result.err .result-tag{color:var(--red)}
.result-big{font-family:'DM Mono',monospace;font-size:28px;color:var(--accent);font-weight:500;word-break:break-all}
.result.err .result-big{font-family:inherit;font-size:15px;color:var(--red)}
.result-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:9px;margin-top:4px}
.result-item{background:#fff;border:1px solid var(--accent-border);border-radius:7px;padding:9px 12px}
.result-item-k{font-size:10.5px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);font-weight:700;margin-bottom:2px}
.result-item-v{font-family:'DM Mono',monospace;font-size:14px;color:var(--text);font-weight:500;word-break:break-all}
.save-result-btn{
  display:block;margin-top:12px;padding:7px 14px;border:1px solid var(--accent-border);border-radius:var(--r-sm);
  background:#fff;color:var(--accent);font-family:inherit;font-size:12.5px;font-weight:700;cursor:pointer
}
.save-result-btn:hover{background:var(--accent-bg)}
.save-result-btn:disabled{opacity:.6;cursor:default}

/* ── Keypad calculator (iOS-style) ── */
.calc-card{
  max-width:360px;margin:0 auto;border-radius:24px;padding:18px 16px 20px;
  background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-md);
}

/* Standard / Scientific segmented switch */
.calc-switch{display:flex;background:#eef0f5;border-radius:10px;padding:3px;margin-bottom:14px}
.cms-btn{
  flex:1;border:none;background:none;padding:8px 0;border-radius:8px;cursor:pointer;
  font-family:inherit;font-size:13.5px;font-weight:600;color:var(--muted);transition:all .15s
}
.cms-btn.active{background:#fff;color:#1a1d2e;box-shadow:0 1px 3px rgba(0,0,0,.12)}

.calc-display{text-align:right;padding:6px 6px 16px}
.calc-expr{font-family:'DM Mono',monospace;font-size:13.5px;color:var(--dim);min-height:17px;word-break:break-all}
.calc-result{font-family:'DM Mono',monospace;font-size:40px;font-weight:500;color:#1a1d2e;margin-top:2px;word-break:break-all}

/* Memory row */
.calc-mem-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:8px}
.cm-btn{
  border:none;background:none;padding:6px 0;border-radius:8px;cursor:pointer;
  font-family:inherit;font-size:12.5px;font-weight:700;color:#a9c8f5;transition:color .15s
}
.calc-mem-row.has-mem .cm-btn{color:var(--accent)}
.cm-btn:hover{color:var(--accent)}

.calc-keys{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.ck{
  border:none;border-radius:14px;cursor:pointer;font-family:inherit;
  padding:14px 4px;font-size:15px;font-weight:600;transition:transform .1s,filter .15s;
  display:flex;align-items:center;justify-content:center;background:#eef0f5;color:#1a1d2e
}
.ck:hover{filter:brightness(.96)}
.ck:active{transform:scale(.95)}
.ck.hide{display:none}

.ck-num{background:none;font-size:24px;font-weight:400;padding:12px 4px}
.ck-toggle{color:var(--accent)}
.ck-toggle.on{background:var(--accent);color:#fff}
.ck-util{color:#1a1d2e}
.ck-op{background:#ff9500;color:#fff;font-size:19px}
.ck-eq{background:#0a84ff;color:#fff;font-size:19px}

@media(max-width:400px){
  .calc-card{max-width:100%}
  .calc-keys,.calc-mem-row{gap:6px}
  .ck{font-size:13.5px;padding:12px 2px}
  .ck-num{font-size:21px}
}

/* ── Developer API docs ── */
.api-code{
  font-family:'DM Mono',monospace;font-size:13px;background:var(--surface2);border:1px solid var(--border);
  border-radius:var(--r-sm);padding:9px 12px;color:var(--text);word-break:break-all
}
.api-pre{white-space:pre;overflow-x:auto;line-height:1.6}
#apiDocsTable{font-family:inherit}
#apiDocsTable th{position:sticky;top:0;background:var(--surface2);text-align:left;padding:9px 12px;font-size:10.5px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);border-bottom:1px solid var(--border)}
#apiDocsTable td{padding:9px 12px;border-bottom:1px solid var(--border);vertical-align:top}
#apiDocsTable tr:last-child td{border-bottom:none}
#apiDocsTable .api-cat{font-weight:700;color:var(--accent);white-space:nowrap}
#apiDocsTable .api-action{font-family:'DM Mono',monospace;color:var(--text)}
#apiDocsTable .api-params{font-family:'DM Mono',monospace;color:var(--muted);font-size:12px}
#apiDocsTable .api-desc{color:var(--muted)}

/* ── Home ── */
.most-used-card{
  margin-bottom:22px;padding:20px 22px;border-radius:14px;
  background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow)
}
.most-used-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.most-used-label{font-size:11px;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:.5px}
.most-used-title{font-size:20px;font-weight:800;margin-top:2px}
.most-used-link{font-size:12.5px;font-weight:600;color:var(--accent);text-decoration:none}
.most-used-link:hover{text-decoration:underline}

.uc-tabs{display:flex;flex-wrap:wrap;gap:6px}
.uc-tab{
  padding:7px 14px;border:1px solid var(--border);border-radius:8px;background:var(--surface2);
  font-family:inherit;font-size:12.5px;font-weight:700;color:var(--text);cursor:pointer;transition:all .15s
}
.uc-tab:hover{border-color:var(--accent)}
.uc-tab.active{background:var(--accent);border-color:var(--accent);color:#fff}

.uc-results{margin-top:16px;display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px}
.uc-hint{grid-column:1/-1;font-size:13px;color:var(--muted);padding:8px 2px}
.uc-result-row{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:9px 12px;border-radius:9px;background:var(--surface2);border:1px solid var(--border)
}
.uc-result-unit{font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.uc-result-val{font-size:13px;font-weight:700;font-family:'DM Mono',monospace;white-space:nowrap}
@media(max-width:640px){.uc-tabs{gap:5px}.uc-tab{padding:6px 10px;font-size:12px}}

.section-label{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.6px;margin:22px 0 10px}
.section-label:first-of-type{margin-top:0}
.section-label .sl-hint{font-size:11px;font-weight:400;text-transform:none;letter-spacing:0;color:var(--dim)}

/* Section tabs ── switch the grid below instead of navigating away */
.home-tabs{display:flex;gap:2px;border-bottom:2px solid var(--border);margin-bottom:20px;overflow-x:auto;scrollbar-width:none}
.home-tabs::-webkit-scrollbar{display:none}
.home-tab{
  display:flex;align-items:center;gap:7px;padding:11px 16px;border:none;background:none;cursor:pointer;
  font-family:inherit;font-size:13.5px;font-weight:600;color:var(--muted);white-space:nowrap;
  border-bottom:2.5px solid transparent;margin-bottom:-2px;transition:all .15s
}
.home-tab:hover{color:var(--text)}
.home-tab.active{color:var(--tab-color,var(--accent));border-bottom-color:var(--tab-color,var(--accent))}
.home-tab .tab-count{
  font-size:10.5px;font-weight:700;color:var(--dim);background:var(--bg);
  padding:1px 7px;border-radius:10px;transition:all .15s
}
.home-tab.active .tab-count{color:var(--tab-color,var(--accent));background:color-mix(in srgb, var(--tab-color, var(--accent)) 14%, transparent)}
.home-tab[data-cat="Mathematics"]     { --tab-color:#2563eb }
.home-tab[data-cat="Finance"]         { --tab-color:#059669 }
.home-tab[data-cat="Health"]          { --tab-color:#dc2626 }
.home-tab[data-cat="Unit Conversion"] { --tab-color:#7c3aed }
.home-tab[data-cat="Date & Time"]     { --tab-color:#d97706 }
.home-tab[data-cat="Science"]         { --tab-color:#0891b2 }
.home-tab[data-cat="Everyday"]        { --tab-color:#be185d }

.quick-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.quick-card{
  display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r-sm);padding:12px 14px;cursor:pointer;transition:all .15s;box-shadow:var(--shadow);
  color:var(--text);text-decoration:none
}
.quick-card:hover{border-color:var(--accent);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.quick-card .qi{font-size:19px;flex-shrink:0}
.quick-card .qn{font-size:13.5px;font-weight:600}
.recent-empty{color:var(--dim);font-size:13px;padding:10px 2px}

.tool-section{margin-bottom:6px}
.tool-section.hide{display:none}
.tool-section-head{display:flex;align-items:center;gap:8px;margin-bottom:11px;padding-left:9px;border-left:3px solid var(--cat-color,var(--accent))}
.tool-section-head .tsi{font-size:15px}
.tool-section-head .tsn{font-size:13.5px;font-weight:700;color:var(--cat-color,var(--text))}
.tool-section-head .tsc{font-size:11.5px;color:var(--muted)}

/* Button-style tool grid: icon on top, label below */
.tool-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin-bottom:24px}
/* Row 1: icon + name (the click target). Row 2: favourite toggle.
   Two real elements, not one <a> wrapping a nested <button> — nesting
   interactive elements inside a link is invalid HTML and behaves
   unpredictably across browsers. */
.tool-card{
  display:flex;align-items:center;gap:6px;
  background:var(--surface);border:1px solid var(--border);border-radius:14px;
  padding:12px;transition:all .15s;box-shadow:var(--shadow)
}
.tool-card:hover{border-color:var(--cat-color,var(--accent));transform:translateY(-2px);box-shadow:var(--shadow-md)}
.tool-card-link{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--text);min-width:0;flex:1}
.tool-card-link:hover{color:var(--cat-color,var(--accent))}
.tool-card .ti{font-size:19px;line-height:1;flex-shrink:0}
.tool-card .tn{font-size:12px;font-weight:600;line-height:1.25;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tool-card-fav{
  flex-shrink:0;background:none;border:none;cursor:pointer;font-size:15px;
  color:var(--dim);padding:0;line-height:1
}
.tool-card-fav:hover{color:#f59e0b}
.tool-card-fav.is-fav{color:#f59e0b}
.tool-card.hide{display:none}
.no-results{display:none;color:var(--muted);font-size:13.5px;padding:20px 0;text-align:center}

/* Related-calculator tiles: simpler, single-line, no icon/favourite */
.related-tile{
  display:flex;align-items:center;justify-content:center;text-align:center;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-sm);
  padding:9px 10px;font-size:12.5px;font-weight:600;color:var(--text);text-decoration:none;
  transition:all .15s
}
.related-tile:hover{border-color:var(--accent);background:var(--accent-bg);color:var(--accent)}
.no-results.show{display:block}

.tool-section[data-cat="Mathematics"]      { --cat-color:#2563eb }
.tool-section[data-cat="Finance"]          { --cat-color:#059669 }
.tool-section[data-cat="Health"]           { --cat-color:#dc2626 }
.tool-section[data-cat="Unit Conversion"]  { --cat-color:#7c3aed }
.tool-section[data-cat="Date & Time"]      { --cat-color:#d97706 }
.tool-section[data-cat="Science"]          { --cat-color:#0891b2 }
.tool-section[data-cat="Everyday"]         { --cat-color:#be185d }

/* Resistor builder */
.res-list{display:flex;flex-direction:column;gap:6px}
.res-row{display:flex;gap:6px}
.res-row input{flex:1}
.res-row button{padding:8px 11px;border:1px solid var(--border);border-radius:6px;background:#fff;cursor:pointer;font-size:13px;color:var(--red)}

/* overlay */
.overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:49}
.overlay.show{display:block}

/* Mobile */
@media(max-width:1024px){
  .tool-grid{grid-template-columns:repeat(4,1fr)}
  .quick-grid{grid-template-columns:repeat(4,1fr)}
}
@media(max-width:768px){
  .topnav-dropdown,.topnav-search,.topnav-link-hide-sm{display:none}
  .topnav-burger{display:flex}
  .g2,.g3{grid-template-columns:1fr}
  .content{padding:16px}
  .topnav-inner{padding:0 14px}
  .ios-app-badge{top:8px;right:10px;padding:4px 10px 4px 4px}
  .ios-app-badge-name{font-size:11px}
  .tool-grid{grid-template-columns:repeat(3,1fr)}
  .quick-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:420px){
  .tool-grid{grid-template-columns:repeat(2,1fr)}
}