/* MetaCalculator - shared stylesheet (original design) */
:root{
  --primary:#1e56d8;
  --primary-dark:#153fa3;
  --primary-light:#e8effc;
  --accent:#0ea5e9;
  --bg:#f4f6fb;
  --card:#ffffff;
  --text:#1e293b;
  --muted:#64748b;
  --border:#e2e8f0;
  --success:#15803d;
  --success-bg:#f0fdf4;
  --warning:#b45309;
  --radius:12px;
  --shadow:0 1px 3px rgba(15,23,42,.08),0 4px 14px rgba(15,23,42,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.65;font-size:16px;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1120px;margin:0 auto;padding:0 20px}

/* ---------- header ---------- */
.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:1.42rem;color:var(--text);letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo-mark{
  width:44px;height:44px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#2b63e7 0%,#1e56d8 45%,#0ea5e9 100%);
  box-shadow:0 5px 16px rgba(30,86,216,.38), inset 0 1.5px 0 rgba(255,255,255,.4), inset 0 -2px 5px rgba(0,0,0,.14);
  transition:transform .22s ease, box-shadow .22s ease;
}
.logo:hover .logo-mark{transform:translateY(-1px) rotate(-4deg);
  box-shadow:0 9px 22px rgba(30,86,216,.48), inset 0 1.5px 0 rgba(255,255,255,.4), inset 0 -2px 5px rgba(0,0,0,.14)}
.logo-mark svg{width:28px;height:28px;display:block}
.logo span.brand b{
  background:linear-gradient(115deg,#1e56d8 15%,#0ea5e9 85%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.main-nav{display:flex;gap:4px}
.main-nav a{padding:8px 14px;border-radius:8px;color:var(--text);font-weight:600;font-size:.95rem}
.main-nav a:hover{background:var(--primary-light);text-decoration:none}
.main-nav a.active{background:var(--primary);color:#fff}
/* sister-site link as a blue CTA box (matches MetaSeoTool's MetaCalculator box) */
.nav-ext{display:inline-block;background:linear-gradient(135deg,var(--primary),var(--accent)) !important;
  color:#fff !important;border-radius:999px;padding:10px 18px !important;font-weight:700;
  margin-left:8px;box-shadow:0 4px 14px rgba(30,86,216,.35);white-space:nowrap}
.nav-ext:hover{color:#fff !important;transform:translateY(-1px);text-decoration:none;
  box-shadow:0 6px 18px rgba(30,86,216,.45);background:linear-gradient(135deg,var(--primary-dark),#0b8fd4) !important}
.nav-ext-logo{width:18px;height:18px;vertical-align:-4px;margin-right:7px}
/* ---------- house ad (sister-site promo until AdSense approval) ---------- */
.ad-slot{margin:20px auto;max-width:900px;padding:0 4px}
.ad-slot.ad-below-title{margin-top:6px}
.ad-label{display:block;font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);text-align:center;margin-bottom:6px}
.house-ad{position:relative;overflow:hidden;display:flex;align-items:center;gap:15px;padding:16px 22px;border-radius:18px;
  background:linear-gradient(115deg,#f97316 0%,#f43f5e 55%,#ec4899 100%);
  border:1px solid rgba(255,255,255,.28);box-shadow:0 6px 24px rgba(244,63,94,.35);
  transition:transform .2s ease, box-shadow .2s ease}
.house-ad::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(105deg,transparent 40%,rgba(255,255,255,.22) 50%,transparent 60%);
  transform:translateX(-120%);animation:houseSheen 4.5s ease-in-out infinite}
@keyframes houseSheen{0%,55%{transform:translateX(-120%)}90%,100%{transform:translateX(120%)}}
.house-ad:hover{text-decoration:none;transform:translateY(-2px);
  box-shadow:0 10px 30px rgba(244,63,94,.5)}
.house-ad-emoji{font-size:2rem;line-height:1;flex:none;background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.3);border-radius:50%;width:52px;height:52px;
  display:inline-flex;align-items:center;justify-content:center}
.house-ad-txt{min-width:0}
.house-ad-txt b{display:block;color:#fff;font-size:1.05rem;letter-spacing:-.01em;text-shadow:0 1px 3px rgba(0,0,0,.25)}
.house-ad-txt small{color:#ffe4e6;font-size:.85rem;display:block;margin-top:2px}
.house-ad-btn{margin-left:auto;flex:none;color:#be123c;font-weight:800;font-size:.92rem;
  background:#fff;padding:11px 22px;border-radius:999px;box-shadow:0 3px 12px rgba(0,0,0,.25);white-space:nowrap;
  transition:transform .2s ease}
.house-ad:hover .house-ad-btn{transform:scale(1.04)}
@media(max-width:560px){
  .house-ad{flex-wrap:wrap;gap:10px;padding:14px 16px}
  .house-ad-emoji{font-size:1.6rem;width:44px;height:44px}
  .house-ad-btn{margin-left:0;width:100%;text-align:center}
}
@media(prefers-reduced-motion:reduce){.house-ad::after{animation:none}}
.nav-lang{display:inline-flex;align-items:center;gap:7px;padding:8px 14px;border-radius:8px;
  font-weight:600;font-size:.95rem;color:var(--text)}
.nav-lang:hover{background:var(--primary-light)}
.nav-lang .lang-ic{font-size:1.05rem}
.lang-offline{font-size:1.05rem;opacity:.4;cursor:not-allowed}
#google_translate_element .goog-te-gadget{font-size:0;line-height:0}
#google_translate_element .goog-te-gadget .goog-te-combo{font-size:.88rem;font-weight:600;
  color:var(--text);border:1px solid var(--border);border-radius:8px;padding:6px 8px;
  background:#fff;cursor:pointer;max-width:132px;font-family:inherit}
#google_translate_element .goog-te-gadget .goog-te-combo:hover{border-color:var(--primary);color:var(--primary)}
.goog-te-banner-frame{display:none !important}
body{top:0 !important}
.skiptranslate iframe{display:none !important}

/* ---------- hero (homepage) ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  padding:74px 0 70px;text-align:center;
  background:
    radial-gradient(900px 480px at 12% -10%,rgba(124,58,237,.55),transparent 60%),
    radial-gradient(760px 420px at 88% 110%,rgba(14,165,233,.5),transparent 60%),
    linear-gradient(120deg,#0a1740 0%,#1e3fae 45%,#1e56d8 70%,#0e7490 100%);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:radial-gradient(rgba(255,255,255,.13) 1.2px,transparent 1.2px);
  background-size:26px 26px;
  -webkit-mask-image:linear-gradient(180deg,#000 25%,transparent 85%);
  mask-image:linear-gradient(180deg,#000 25%,transparent 85%);
}
.hero-orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5;pointer-events:none}
.hero-orb.o1{width:340px;height:340px;left:-90px;top:-70px;background:#7c3aed}
.hero-orb.o2{width:300px;height:300px;right:-70px;bottom:-90px;background:#0ea5e9}
.hero-inner{position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;font-weight:700;
  letter-spacing:.07em;text-transform:uppercase;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);
  padding:8px 18px;border-radius:999px;margin-bottom:18px;backdrop-filter:blur(6px)}
.hero h1{font-size:2.7rem;margin-bottom:14px;letter-spacing:-1px;font-weight:800;line-height:1.15}
.hero h1 .hl{background:linear-gradient(90deg,#ffd166,#ff9f6e);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:1.1rem;opacity:.94;max-width:660px;margin:0 auto;color:#e6edff}
/* hero search */
.hero-search{position:relative;max-width:560px;margin:26px auto 0}
.hero-search .s-icon{position:absolute;left:20px;top:50%;transform:translateY(-50%);
  font-size:1.15rem;opacity:.7;pointer-events:none}
#calc-search{width:100%;padding:17px 22px 17px 54px;font-size:1.02rem;border:0;
  border-radius:999px;box-shadow:0 12px 34px rgba(2,8,30,.35);color:var(--text)}
#calc-search:focus{outline:3px solid rgba(255,209,102,.75)}
.search-results{position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;
  border-radius:16px;box-shadow:0 18px 50px rgba(2,8,30,.35);text-align:left;
  display:none;z-index:60;max-height:340px;overflow-y:auto}
.search-results.open{display:block}
.sr-item{display:flex;gap:12px;align-items:center;padding:11px 16px;
  text-decoration:none;color:var(--text)}
.sr-item:hover,.sr-item.active{background:var(--primary-light);text-decoration:none}
.sr-item .sr-ic{font-size:1.3rem;flex:0 0 auto}
.sr-item .sr-nm{font-weight:700;font-size:.95rem}
.sr-item .sr-tg{font-size:.8rem;color:var(--muted);white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis;display:block;max-width:100%}
.sr-empty{padding:16px;color:var(--muted);font-size:.92rem;text-align:center}
/* sister-site promo */
.hero-promo{display:inline-flex;align-items:center;gap:8px;margin-top:20px;font-size:.92rem;
  background:rgba(255,255,255,.1);border:1px dashed rgba(255,255,255,.45);
  padding:10px 20px;border-radius:999px;color:#eaf1ff;flex-wrap:wrap;justify-content:center}
.hero-promo a{color:#ffd166;font-weight:800;text-decoration:none}
.hero-promo a:hover{text-decoration:underline}
/* hero stats */
.hero .stats{display:flex;gap:16px;justify-content:center;margin-top:28px;flex-wrap:wrap}
.hero .stats div{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  padding:12px 26px;border-radius:14px;font-weight:800;font-size:1.25rem;backdrop-filter:blur(6px)}
.hero .stats small{display:block;font-weight:400;opacity:.85;font-size:.78rem}
/* hero decorations: animated orbs, floating math glyphs, wave divider */
.hero-orb{animation:orbDrift 14s ease-in-out infinite}
.hero-orb.o2{animation-delay:-7s}
@keyframes orbDrift{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(40px,30px) scale(1.12)}}
.hero-deco{position:absolute;font-weight:800;color:rgba(255,255,255,.14);
  pointer-events:none;z-index:0;animation:decoFloat 9s ease-in-out infinite;line-height:1}
@keyframes decoFloat{0%,100%{transform:translateY(0) rotate(-8deg)}50%{transform:translateY(-20px) rotate(8deg)}}
.hero-wave{display:block;width:100%;height:64px;position:absolute;left:0;bottom:-1px;z-index:0}
.hero-search{box-shadow:0 0 0 6px rgba(255,255,255,.12),0 12px 34px rgba(2,8,30,.35);border-radius:999px}
@media (prefers-reduced-motion:reduce){.hero-orb,.hero-deco{animation:none}}

/* ---------- category sections ---------- */
.cat-section{padding:34px 0 6px}
.cat-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.cat-icon{width:46px;height:46px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  font-size:1.5rem;background:var(--primary-light)}
.cat-head h2{font-size:1.45rem}
.cat-head p{color:var(--muted);font-size:.92rem}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.tool-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;display:flex;flex-direction:column}
.tool-card:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(30,86,216,.14);text-decoration:none}
.tool-card h3{font-size:1.02rem;color:var(--text);margin-bottom:6px}
.tool-card p{font-size:.86rem;color:var(--muted);flex:1}
.tool-card .open{margin-top:12px;font-weight:700;color:var(--primary);font-size:.9rem}

/* ---------- calculator page ---------- */
.breadcrumb{font-size:.85rem;color:var(--muted);margin:22px 0 8px}
.breadcrumb a{color:var(--muted)}
.page-head h1{font-size:1.9rem;margin-bottom:10px;letter-spacing:-.3px}
.intro{color:#334155;max-width:760px;margin-bottom:8px}
.intro p{margin-bottom:10px}
.calc-wrap{max-width:760px;margin:26px 0}
.calc-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:24px;margin-bottom:22px}
.calc-card h2.calc-title{font-size:1.2rem;margin-bottom:16px;padding-bottom:12px;position:relative}
.calc-card h2.calc-title::after{content:"";position:absolute;left:0;bottom:0;height:3px;width:76px;border-radius:3px;
  background:linear-gradient(90deg,var(--primary),var(--accent))}
.field{margin-bottom:14px}
.field label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
.field .hint{font-weight:400;color:var(--muted);font-size:.8rem}
.input-group{display:flex;align-items:stretch}
.input-group .affix{background:#f1f5f9;border:1px solid var(--border);padding:9px 12px;font-weight:600;color:var(--muted);font-size:.95rem}
.input-group .affix:first-child{border-radius:8px 0 0 8px;border-right:0}
.input-group .affix:last-child{border-radius:0 8px 8px 0;border-left:0}
.input-group input{flex:1;min-width:0}
input[type=number],input[type=text],input[type=date],input[type=time],select,textarea{
  width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:1rem;
  font-family:inherit;background:#fff;color:var(--text)}
.input-group input{border-radius:0}
.input-group input:first-child{border-radius:8px 0 0 8px}
.input-group input:last-child{border-radius:0 8px 8px 0}
.input-group input:only-child{border-radius:8px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--primary);outline-offset:0;border-color:var(--primary)}
textarea{min-height:90px;resize:vertical;font-family:ui-monospace,Consolas,monospace}
.check-row{display:flex;align-items:center;gap:10px}
.check-row input{width:18px;height:18px;accent-color:var(--primary)}
.btn-row{display:flex;gap:12px;margin-top:18px;flex-wrap:wrap}
.btn{border:0;border-radius:999px;padding:11px 30px;font-size:1rem;font-weight:700;cursor:pointer}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-ghost{background:#eef2f7;color:var(--text)}
.btn-ghost:hover{background:#e2e8f0}
.results{display:none;margin-top:20px;border-top:2px dashed var(--border);padding-top:16px}
.results.show{display:block}
.results h3{font-size:1.05rem;margin-bottom:12px;color:var(--primary-dark)}
.result-row{display:flex;justify-content:space-between;gap:12px;padding:9px 12px;border-radius:8px;font-size:.97rem}
.result-row:nth-child(odd){background:var(--primary-light)}
.result-row .r-label{color:#334155}
.result-row .r-value{font-weight:800;color:var(--text);text-align:right}
.result-row.hero-result{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff}
.result-row.hero-result .r-label,.result-row.hero-result .r-value{color:#fff}
.result-row .code-val{font-family:ui-monospace,Consolas,monospace;word-break:break-all;display:flex;gap:8px;align-items:center}
.copy-btn{background:#fff;border:1px solid var(--border);border-radius:6px;padding:4px 10px;cursor:pointer;font-size:.8rem;font-weight:700}
.copy-btn:hover{background:var(--primary-light)}
.result-note{background:#fffbeb;border:1px solid #fde68a;color:var(--warning);border-radius:8px;
  padding:10px 14px;margin-top:10px;font-size:.9rem}
.result-error{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;border-radius:8px;
  padding:10px 14px;margin-top:10px;font-size:.92rem}
table.data-table{width:100%;border-collapse:collapse;margin-top:12px;font-size:.88rem}
table.data-table th,table.data-table td{border:1px solid var(--border);padding:7px 9px;text-align:right}
table.data-table th{background:#f1f5f9;text-align:right;font-weight:700}
table.data-table td:first-child,table.data-table th:first-child{text-align:left}

/* scientific calculator */
.sci-display{width:100%;font-family:ui-monospace,Consolas,monospace;font-size:1.6rem;text-align:right;
  padding:14px;border:0;border-radius:10px;margin-bottom:6px;min-height:64px;word-break:break-all;
  background:linear-gradient(135deg,#0f2447,#1e3a6e);color:#fff;box-shadow:inset 0 2px 8px rgba(0,0,0,.35)}
.sci-history{text-align:right;color:var(--muted);font-size:.85rem;min-height:22px;font-family:ui-monospace,Consolas,monospace}
.sci-keys{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:10px}
.sci-keys button{padding:13px 4px;font-size:1.02rem;border:1px solid var(--border);border-radius:8px;
  background:#fff;cursor:pointer;font-weight:600}
.sci-keys button:hover{background:var(--primary-light)}
.sci-keys button.op{background:#eef4ff;color:var(--primary);font-weight:800}
.sci-keys button.eq{background:var(--primary);color:#fff;font-weight:800;grid-column:span 2}
.sci-keys button.fn{background:#f1f5f9;font-size:.9rem}

/* ---------- related / static pages ---------- */
.related{margin:34px 0}
.related h2{font-size:1.3rem;margin-bottom:14px}
.static-page{max-width:780px;margin:30px auto;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);padding:34px}
.static-page h1{margin-bottom:14px;font-size:1.8rem}
.static-page h2{margin:22px 0 8px;font-size:1.2rem}
.static-page p,.static-page li{margin-bottom:10px;color:#334155}
.static-page ul{padding-left:22px}
.contact-form .field{margin-bottom:14px}

/* ---------- footer ---------- */
.site-footer{background:#0f172a;color:#cbd5e1;margin-top:50px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px;padding:40px 0 24px}
.site-footer h4{color:#fff;margin-bottom:12px;font-size:1rem}
.site-footer a{color:#cbd5e1;font-size:.92rem}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:8px}
.footer-brand p{font-size:.9rem;color:#94a3b8}
.footer-bottom{border-top:1px solid #1e293b;padding:16px 0;font-size:.85rem;color:#94a3b8;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* ad slots: old empty-slot rules retired — the house-ad block above styles the
   filled slots. After AdSense approval these rules style the AdSense units. */
.ad-slot:empty{width:100%;max-width:1120px;min-height:90px;margin:18px auto;text-align:center;
  background:#e9eef5;border-radius:10px;overflow:hidden}
.ad-below-title{margin:4px auto 22px}

/* ---------- referral promo bar (very top of every page) ---------- */
.ref-bar{background:linear-gradient(90deg,#3b1f8f,#673de6 45%,#8b5cf6);color:#fff;
  font-size:.82rem;position:relative;z-index:60}
.ref-inner{max-width:1120px;margin:0 auto;padding:8px 44px 8px 20px;display:flex;
  gap:12px;align-items:center;justify-content:center;flex-wrap:wrap}
.ref-bar .ref-txt{opacity:.95}
.ref-bar .ref-txt b{font-weight:800}
.ref-cta{background:#fff;color:#4c1d95;font-weight:800;text-decoration:none;
  padding:5px 16px;border-radius:999px;white-space:nowrap;
  box-shadow:0 2px 8px rgba(0,0,0,.25);transition:transform .15s}
.ref-cta:hover{transform:translateY(-1px);color:#4c1d95;text-decoration:none}
.ref-close{position:absolute;right:10px;top:50%;transform:translateY(-50%);
  background:none;border:0;color:rgba(255,255,255,.75);font-size:1rem;cursor:pointer;
  padding:4px 8px;line-height:1}
.ref-close:hover{color:#fff}
@media (max-width:640px){.ref-bar{font-size:.75rem}
  .ref-inner{padding:7px 36px 7px 12px;gap:8px}}

/* ---------- trending strip (very top of every page) ---------- */
.trend-strip{background:#101c33;color:#fff;font-size:.8rem}
.trend-inner{max-width:1120px;margin:0 auto;padding:7px 20px;display:flex;gap:10px;align-items:center}
.trend-label{font-weight:700;flex:0 0 auto;color:#ffd166}
.trend-viewport{flex:1;min-width:0;overflow:hidden;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 24px,#000 calc(100% - 24px),transparent);
  mask-image:linear-gradient(90deg,transparent,#000 24px,#000 calc(100% - 24px),transparent)}
.trend-track{display:flex;width:max-content;animation:trend-scroll 32s linear infinite}
.trend-strip:hover .trend-track{animation-play-state:paused}
.trend-group{display:flex;gap:8px;padding-right:8px}
.trend-strip a{color:#dbe4ff;text-decoration:none;padding:3px 11px;white-space:nowrap;
  border:1px solid rgba(255,255,255,.22);border-radius:999px;flex:0 0 auto}
.trend-strip a:hover{background:rgba(255,255,255,.14);color:#fff;text-decoration:none}
.trend-strip a.trend-bonus{background:#ffd166;border-color:#ffd166;color:#3b2f00;font-weight:800}
.trend-strip a.trend-bonus:hover{background:#ffdf8a;color:#3b2f00}
.trend-strip a.trend-bonus b{background:#16a34a;color:#fff;font-size:.68em;padding:2px 8px;border-radius:999px;margin-left:6px;letter-spacing:.05em}
@keyframes trend-scroll{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.trend-track{animation:none}}

/* ---------- popular (homepage highlight) ---------- */
.popular-section{margin:26px 0 10px;padding:26px 26px 30px;border-radius:var(--radius);
  background:linear-gradient(135deg,#fff8e6 0%,#ffefd0 100%);
  border:2px solid #f2c94c}
.pop-head{display:flex;gap:14px;align-items:center;margin-bottom:18px}
.pop-icon{font-size:2rem;line-height:1}
.pop-head h2{font-size:1.35rem;margin:0 0 4px}
.pop-head p{color:var(--muted);font-size:.92rem;margin:0}
.popular-section .tool-card{border-color:#eed9a0;background:#fffdf7}
.popular-section .tool-card:hover{box-shadow:0 6px 20px rgba(180,130,20,.18)}

/* ---------- responsive ---------- */
@media(max-width:720px){
  .hero{padding:54px 0 50px}
  .hero h1{font-size:1.9rem}
  .hero-search{margin-left:6px;margin-right:6px}
  #calc-search{padding:14px 18px 14px 48px;font-size:.95rem}
  .hero-promo{font-size:.82rem;margin-left:6px;margin-right:6px}
  .hero .stats div{padding:10px 18px;font-size:1.05rem}
  .hero-deco{font-size:1.9rem !important;opacity:.7}
  .hero-deco.hide-m{display:none}
  .hero-wave{height:40px}
  .page-head h1{font-size:1.5rem}
  .footer-grid{grid-template-columns:1fr}
  .sci-keys{grid-template-columns:repeat(4,1fr)}
  .sci-keys button.eq{grid-column:span 2}
  .calc-card{padding:18px}
  .ad-slot:empty{min-height:100px}
  .header-inner{flex-wrap:wrap;height:auto;padding-top:10px;padding-bottom:10px;row-gap:6px}
  .main-nav{width:100%;justify-content:flex-start;flex-wrap:wrap}
  .result-row{font-size:.9rem}
}

/* ---------- how-to guide + FAQ (SEO sections on calculator pages) ---------- */
.howto-guide{max-width:760px;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin:26px 0}
.howto-guide h2{font-size:1.25rem;margin-bottom:8px}
.howto-guide>p{color:#334155;margin-bottom:12px}
.howto-steps{list-style:none;padding:0;margin:0;counter-reset:step}
.howto-steps li{counter-increment:step;position:relative;padding:10px 0 10px 44px;
  border-top:1px solid var(--border);color:#334155}
.howto-steps li:first-child{border-top:0}
.howto-steps li::before{content:counter(step);position:absolute;left:0;top:9px;
  width:30px;height:30px;border-radius:50%;background:var(--primary-light);
  color:var(--primary);font-weight:800;font-size:.9rem;display:flex;
  align-items:center;justify-content:center}
.faq-section{max-width:760px;margin:30px 0 34px}
.faq-section h2{font-size:1.3rem;margin-bottom:14px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:10px;
  margin-bottom:10px;box-shadow:var(--shadow);overflow:hidden}
.faq-item summary{cursor:pointer;padding:14px 18px;font-weight:700;font-size:.98rem;
  list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--primary);font-size:1.3rem;font-weight:800;
  flex:none;transition:transform .2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:hover{background:var(--primary-light)}
.faq-item .faq-answer{padding:0 18px 16px;color:#334155;font-size:.95rem}
.faq-item .faq-answer p{margin:0}
@media(max-width:720px){
  .howto-guide{padding:18px}
  .faq-item summary{padding:12px 14px;font-size:.93rem}
}

/* ---------- bonus tool banner (homepage, high prominence) ---------- */
.bonus-banner{position:relative;overflow:hidden;margin:72px 0;padding:60px 48px;border-radius:26px;color:#fff;
  background:linear-gradient(120deg,#6d28d9 0%,#2563eb 55%,#0891b2 100%);
  box-shadow:0 24px 60px rgba(37,99,235,.38)}
.bonus-content{position:relative;z-index:2;max-width:640px}
.bonus-kicker{display:inline-block;font-size:.78rem;font-weight:800;letter-spacing:.14em;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.35);
  padding:8px 16px;border-radius:999px;margin-bottom:18px}
.bonus-banner h2{color:#fff;font-size:2.1rem;margin:0 0 14px;line-height:1.2}
.bonus-free{display:inline-block;vertical-align:middle;font-size:.55em;background:#16a34a;color:#fff;
  border-radius:999px;padding:.3em .9em;margin-left:.5em;letter-spacing:.06em;font-weight:800;
  box-shadow:0 4px 14px rgba(0,0,0,.25)}
.bonus-banner p{color:#e8efff;font-size:1.05rem;line-height:1.65;margin:0 0 26px}
.bonus-banner p b{color:#fff}
.bonus-cta{display:inline-block;background:#fff;color:#1d4ed8;font-weight:800;font-size:1.05rem;
  padding:15px 34px;border-radius:999px;text-decoration:none;
  box-shadow:0 10px 26px rgba(0,0,0,.28);transition:transform .15s}
.bonus-cta:hover{transform:translateY(-2px);text-decoration:none;color:#1d4ed8}
.bonus-deco{position:absolute;right:6%;top:50%;transform:translateY(-50%) rotate(-8deg);
  font-size:7rem;opacity:.28;z-index:1;pointer-events:none}
.bonus-deco.d2{right:22%;top:18%;transform:rotate(12deg);font-size:3.2rem;opacity:.4}
@media(max-width:720px){
  .bonus-banner{margin:52px 0;padding:40px 26px}
  .bonus-banner h2{font-size:1.55rem}
  .bonus-banner p{font-size:.95rem}
  .bonus-deco{font-size:4rem;right:4%}
  .bonus-deco.d2{display:none}
}

/* shimmer sweep on the bonus strip item - draws the eye without flickering */
.trend-strip a.trend-bonus{position:relative;overflow:hidden;display:inline-block;
  animation:bonus-attn 1.4s ease-in-out .4s 2}
@keyframes bonus-attn{
  0%,100%{transform:scale(1);box-shadow:0 0 0 rgba(255,209,102,0)}
  50%{transform:scale(1.1);box-shadow:0 0 22px rgba(255,209,102,.95)}}
.trend-strip a.trend-bonus::after{content:"";position:absolute;top:0;bottom:0;left:-70%;width:45%;
  background:linear-gradient(100deg,rgba(255,255,255,0) 0%,rgba(255,255,255,.65) 50%,rgba(255,255,255,0) 100%);
  animation:bonus-shine 3s ease-in-out infinite;pointer-events:none}
@keyframes bonus-shine{0%{left:-70%}55%,100%{left:135%}}
@media (prefers-reduced-motion:reduce){.trend-strip a.trend-bonus,.trend-strip a.trend-bonus::after{animation:none}}