/* ============ TOKENS ============ */
:root{
  --primary:#1D2E4A; --primary-dark:#0F1E36; --primary-light:#2E4670;
  --accent:#2FA153; --accent-dark:#24853F; --gold:#E5A94E; --cream:#F5EBD8;
  --bg:#fff; --surface:#F5F8FB; --surface-2:#E9EFF6; --card:#fff;
  --text:#16202E; --text-muted:#57657A; --border:#D9E1EC;
  --success:#1E9E5A; --warning:#E0A008; --danger:#C4432B;
  --font-head:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-body:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --fs-h1:clamp(2rem,4vw,3rem); --fs-h2:clamp(1.5rem,3vw,2.25rem); --fs-h3:1.3rem;
  --fs-body:1.0625rem; --fs-sm:.9rem;
  --sp-1:.5rem; --sp-2:1rem; --sp-3:1.5rem; --sp-4:2.5rem; --sp-5:4rem; --sp-6:6rem;
  --r-sm:8px; --r-md:14px; --r-lg:24px; --r-full:999px;
  --sh-sm:0 1px 3px rgba(16,32,56,.08);
  --sh-md:0 8px 24px rgba(16,32,56,.10);
  --sh-lg:0 24px 60px rgba(16,32,56,.14);
  --maxw:1200px; --maxw-narrow:900px;
}
/* ============ DARK THEME ============ */
[data-theme="dark"]{
  --bg:#0C121D; --card:#141D2E; --surface:#16202F; --surface-2:#1C2940;
  --text:#E6ECF5; --text-muted:#9FB0C7; --border:#2B3B54;
  --primary:#8FB0E8; --primary-dark:#A8C2F0; --primary-light:#5A7BB5;
  --accent:#3ECF70; --accent-dark:#2FB45C;
  --success:#3ECF70; --warning:#F0B429; --danger:#F06548;
  --sh-sm:0 1px 3px rgba(0,0,0,.4);
  --sh-md:0 8px 24px rgba(0,0,0,.45);
  --sh-lg:0 24px 60px rgba(0,0,0,.5);
}
[data-theme="dark"] body{background:var(--bg)}
[data-theme="dark"] .site-header,
[data-theme="dark"] .card,
[data-theme="dark"] .faq__item,
[data-theme="dark"] .search__results,
[data-theme="dark"] .nav.is-open,
[data-theme="dark"] .tool,
[data-theme="dark"] .answer-box{background:var(--card)}
[data-theme="dark"] .tool__row input,
[data-theme="dark"] .tool__row select,
[data-theme="dark"] .tool__area,
[data-theme="dark"] .header__search input,
[data-theme="dark"] .rate-editor input{background:var(--card);color:var(--text);border-color:var(--border)}
[data-theme="dark"] .tool__out{background:var(--primary)}
[data-theme="dark"] .mode-toggle{background:var(--surface-2)}
[data-theme="dark"] .mode-toggle button[aria-selected="true"]{background:var(--card);color:var(--primary)}
[data-theme="dark"] .result-rows .rr{background:var(--surface-2)}
[data-theme="dark"] .result-rows .rr--total{background:var(--primary)}
[data-theme="dark"] .formula{background:var(--surface)}
[data-theme="dark"] .source-note{background:var(--surface-2)}
[data-theme="dark"] .chip-list a{background:var(--surface-2);color:var(--text)}
[data-theme="dark"] .chip-list a:hover{background:var(--primary);color:#fff}
[data-theme="dark"] .cat-chip{background:var(--card);color:var(--text);border-color:var(--border)}
[data-theme="dark"] .cat-strip{background:var(--bg)}
[data-theme="dark"] .hero{background:linear-gradient(160deg,#16233C 0%,#1D2E4A 60%,#22345A 100%)}
[data-theme="dark"] .disclaimer{background:#2A1A16;border-color:#5A3226;color:#F0B9A8}
[data-theme="dark"] .answer-box--warn{background:#2A2416;border-left-color:var(--warning)}
[data-theme="dark"] .footer__col{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.1)}
[data-theme="dark"] .hp-display{background:#0A1F33}
[data-theme="dark"] .hp-key{background:var(--card);color:var(--primary);border-color:var(--border)}
[data-theme="dark"] .hp-key--op{background:var(--primary);color:#0C121D}
[data-theme="dark"] .print-grid span,.bingo span{border-color:var(--border)}
[data-theme="dark"] .rate-editor{background:var(--card)}
[data-theme="dark"] .card--tint{background:var(--card)}
[data-theme="dark"] .trust-strip__inner{background:var(--card)}
[data-theme="dark"] .steps li::before{color:#0C121D}
[data-theme="dark"] .monitor-overlay .mo-hint{background:rgba(0,0,0,.85)}
/* Contrast fixes: muted text on dark surfaces + footer */
.site-footer .muted{color:#A8B4C8}
[data-theme="dark"] .muted{color:#9FB0C7}
[data-theme="dark"] .site-footer .muted{color:#A8B4C8}
/* Links in text blocks must be distinguishable by more than color (a11y) */
.section p a,.faq__a a,.answer-box a{text-decoration:underline;text-underline-offset:2px}
/* ============ THEME TOGGLE / ACTIONS ============ */
.header__actions{display:flex;align-items:center;gap:.5rem;justify-self:end}
.theme-toggle{background:var(--card);border:1.5px solid var(--border);border-radius:var(--r-full);width:2.3rem;height:2.3rem;display:grid;place-items:center;font-size:1.05rem;cursor:pointer;transition:transform .15s,border-color .15s;flex-shrink:0}
.theme-toggle:hover{border-color:var(--accent);transform:translateY(-1px)}
/* ============ SCROLL PROGRESS + BACK TO TOP ============ */
.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--accent),var(--primary));z-index:100;transition:width .08s linear}
.back-top{position:fixed;right:1rem;bottom:1rem;z-index:90;width:2.7rem;height:2.7rem;border-radius:var(--r-full);background:var(--primary);color:#fff;border:0;font-size:1.2rem;cursor:pointer;box-shadow:var(--sh-md);opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;transform:translateY(8px)}
.back-top.is-show{opacity:1;pointer-events:auto;transform:none}
.back-top:hover{background:var(--accent);color:#fff}
/* ============ JUMP NAV (tool pages) ============ */
.jump-nav{position:sticky;top:76px;z-index:40;background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--sh-sm);padding:.4rem .6rem;display:flex;flex-wrap:wrap;gap:.3rem;margin-bottom:var(--sp-3)}
.jump-nav a{font-size:.82rem;font-weight:600;color:var(--text-muted);padding:.3rem .7rem;border-radius:var(--r-full);text-decoration:none;transition:background .15s,color .15s}
.jump-nav a:hover{background:var(--surface-2);color:var(--primary);text-decoration:none}
/* ============ FAVORITE (star) BUTTON ============ */
.fav-btn{background:var(--surface-2);border:1.5px solid var(--border);border-radius:var(--r-full);padding:.5rem 1rem;font:inherit;font-weight:700;font-size:.88rem;cursor:pointer;color:var(--text);display:inline-flex;align-items:center;gap:.4rem;transition:all .15s}
.fav-btn:hover{border-color:var(--gold)}
.fav-btn.is-fav{background:#FDF3E0;border-color:var(--gold);color:#8A6D1A}
[data-theme="dark"] .fav-btn.is-fav{background:#2A2416;color:#F0C078;border-color:var(--gold)}
.fav-grid{display:grid;gap:var(--sp-3);grid-template-columns:1fr}
@media(min-width:640px){.fav-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:960px){.fav-grid{grid-template-columns:repeat(3,1fr)}}
.empty-state{background:var(--surface);border:1px dashed var(--border);border-radius:var(--r-md);padding:var(--sp-3);text-align:center;color:var(--text-muted)}
/* ============ HUB FILTER ============ */
.hub-filter{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center;margin-bottom:var(--sp-3)}
.hub-filter input[type="search"]{flex:1;min-width:200px;padding:.6rem 1rem;border:1px solid var(--border);border-radius:var(--r-full);font:inherit;background:var(--card);color:var(--text)}
.hub-filter input[type="search"]:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,161,83,.15)}
.fav-toggle{background:var(--surface-2);border:1.5px solid var(--border);border-radius:var(--r-full);padding:.5rem 1rem;font:inherit;font-weight:700;font-size:.88rem;cursor:pointer;color:var(--text);transition:all .15s}
.fav-toggle:hover{border-color:var(--gold)}
.fav-toggle[aria-pressed="true"]{background:#FDF3E0;border-color:var(--gold);color:#8A6D1A}
[data-theme="dark"] .fav-toggle[aria-pressed="true"]{background:#2A2416;color:#F0C078;border-color:var(--gold)}
.hub-filter__empty{width:100%;text-align:center;color:var(--text-muted);padding:var(--sp-3)}
.card.is-hidden{display:none}
section.section--tight.is-empty{display:none}
/* ============ RESET / BASE ============ */
*,*::before,*::after{box-sizing:border-box}
body{margin:0;font-family:var(--font-body);font-size:var(--fs-body);line-height:1.65;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
h1,h2,h3{font-family:var(--font-head);line-height:1.2;margin:0 0 var(--sp-2);color:var(--primary)}
h1{font-size:var(--fs-h1)} h2{font-size:var(--fs-h2)} h3{font-size:var(--fs-h3)}
p{margin:0 0 var(--sp-2)}
.muted{color:var(--text-muted);font-size:var(--fs-sm)}
.lead{font-size:1.15rem;color:var(--text-muted)}
/* ============ LAYOUT ============ */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--sp-2)}
.wrap--narrow{max-width:var(--maxw-narrow)}
.section{padding:var(--sp-5) 0}
.section--tight{padding:var(--sp-4) 0 var(--sp-2)}
.section--surface{background:var(--surface)}
.grid{display:grid;gap:var(--sp-3)}
.grid--3{grid-template-columns:1fr}
@media(min-width:640px){.grid--3{grid-template-columns:repeat(2,1fr)}}
@media(min-width:960px){.grid--3{grid-template-columns:repeat(3,1fr)}}
/* ============ HEADER (2-tier: logo | nav | search  +  category strip) ============ */
.site-header{position:sticky;top:0;z-index:50;background:#fff;box-shadow:var(--sh-sm)}
.header__inner{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:var(--sp-2);min-height:76px}
.logo{display:flex;align-items:center;justify-self:start}
.nav{justify-self:center;display:flex;justify-content:center}
.nav ul{display:none;list-style:none;gap:var(--sp-3);margin:0;padding:0}
.nav a{color:var(--primary);font-weight:600;font-size:.95rem;padding:.4rem .2rem;border-bottom:2px solid transparent;transition:border-color .15s}
.nav a:hover{text-decoration:none;border-bottom-color:var(--accent)}
.nav-toggle{background:none;border:0;font-size:1.5rem;cursor:pointer;color:var(--primary);justify-self:end}
.header__search{display:none;position:relative;justify-self:end;width:260px}
.header__search input{width:100%;padding:.55rem .9rem .55rem 2.2rem;border:1px solid var(--border);border-radius:var(--r-full);font:inherit;font-size:.9rem;background:var(--surface)}
.header__search input:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(47,161,83,.15)}
.header__search::before{content:"🔍";position:absolute;left:.8rem;top:50%;transform:translateY(-50%);font-size:.9rem;opacity:.6;pointer-events:none}
.search__results{position:absolute;top:calc(100% + 6px);left:0;right:0;background:#fff;border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--sh-md);max-height:400px;overflow-y:auto;display:none;z-index:60}
.search__results.is-open{display:block}
.search__results a{display:flex;align-items:center;gap:.6rem;padding:.6rem .9rem;color:var(--text);font-size:.9rem;border-bottom:1px solid var(--border)}
.search__results a:hover{background:var(--surface);text-decoration:none}
.search__results a:last-child{border-bottom:0}
.search__results .r-emoji{font-size:1.2rem;flex-shrink:0}
.search__results .r-meta{color:var(--text-muted);font-size:.78rem;display:block;margin-top:.1rem}
.search__empty{padding:.9rem;color:var(--text-muted);font-size:.9rem;text-align:center}
@media(min-width:900px){
  .nav ul{display:flex} .header__search{display:block} .nav-toggle{display:none}
}
.nav.is-open ul{display:flex;flex-direction:column;position:absolute;top:76px;left:0;right:0;background:#fff;padding:var(--sp-2);box-shadow:var(--sh-md);z-index:55}

/* ---- Category strip (2 rows, all pillars as wrapped chips) ---- */
.cat-strip{background:linear-gradient(180deg,#fff 0%,var(--surface) 100%);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:.6rem 0}
.cat-strip__inner{display:flex;flex-wrap:wrap;gap:.5rem;padding:.4rem var(--sp-2);max-width:var(--maxw);margin:0 auto;justify-content:center;align-items:center}
.cat-chip{display:inline-flex;align-items:center;gap:.45rem;padding:.55rem 1.1rem;background:#fff;border:1.5px solid var(--border);border-radius:var(--r-full);color:var(--text);font-weight:600;font-size:.88rem;white-space:nowrap;transition:all .2s;box-shadow:var(--sh-sm)}
.cat-chip:hover{border-color:var(--accent);color:var(--primary);text-decoration:none;transform:translateY(-2px);box-shadow:var(--sh-md)}
.cat-chip .cc-ico{font-size:1.15rem;line-height:1}
/* ============ BUTTONS ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.7rem 1.3rem;border-radius:var(--r-full);font-weight:700;font-size:.95rem;border:2px solid transparent;transition:transform .15s,box-shadow .15s,background .15s;text-decoration:none}
.btn:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--sh-md)}
.btn--accent{background:#1a7a34;color:#fff}
.btn--accent:hover{background:#14602a;color:#fff}
.btn--ghost{border-color:currentColor;color:var(--primary);background:transparent}
.btn--lg{padding:.95rem 1.8rem;font-size:1.02rem}
.btn-row{display:flex;flex-wrap:wrap;gap:var(--sp-2);margin-top:var(--sp-3)}
/* ============ HERO with animated background blobs ============ */
.hero{position:relative;background:linear-gradient(160deg,var(--primary) 0%,var(--primary-light) 60%,#22508C 100%);color:#fff;padding:var(--sp-5) 0 var(--sp-6);overflow:hidden;isolation:isolate}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(70px);opacity:.28;z-index:-1;pointer-events:none}
.hero::before{width:520px;height:520px;background:radial-gradient(circle at 30% 30%,var(--accent),transparent 70%);top:-140px;right:-120px}
.hero::after{width:420px;height:420px;background:radial-gradient(circle at 60% 40%,var(--gold),transparent 70%);bottom:-160px;left:-100px}
.hero h1{color:#fff;max-width:22ch;position:relative}
.hero__sub{font-size:1.15rem;opacity:.92;max-width:56ch;position:relative}
.hero .btn--ghost{color:#fff}
.hero__inner{position:relative}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:800;color:#F0C078;margin:0 0 var(--sp-1)}
.hero__proof{margin-top:var(--sp-3);font-size:.9rem;opacity:.85}
/* Floating emoji objects (decorative) */
.hero__objs{position:absolute;inset:0;pointer-events:none;z-index:-1;overflow:hidden}
.hero__objs span{position:absolute;font-size:2.2rem;opacity:.14;animation:floatY 12s ease-in-out infinite}
.hero__objs span:nth-child(1){top:12%;left:8%;animation-delay:0s}
.hero__objs span:nth-child(2){top:22%;right:12%;animation-delay:-2s;font-size:2.6rem}
.hero__objs span:nth-child(3){bottom:20%;left:14%;animation-delay:-4s;font-size:2rem}
.hero__objs span:nth-child(4){bottom:30%;right:22%;animation-delay:-6s;font-size:2.4rem}
.hero__objs span:nth-child(5){top:48%;left:44%;animation-delay:-8s;font-size:2.8rem}
.hero__objs span:nth-child(6){top:66%;right:8%;animation-delay:-10s}
@keyframes floatY{0%,100%{transform:translateY(0) rotate(-4deg)}50%{transform:translateY(-24px) rotate(6deg)}}
@keyframes gradShift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
@media(prefers-reduced-motion:reduce){
  .hero__objs span{animation:none}
  .hero{background:linear-gradient(160deg,var(--primary) 0%,var(--primary-light) 100%)}
}
/* ============ TRUST STRIP ============ */
.trust-strip{background:var(--surface-2);margin-top:calc(var(--sp-4) * -1);position:relative}
.trust-strip__inner{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--sp-2);background:#fff;border-radius:var(--r-lg);box-shadow:var(--sh-md);padding:var(--sp-3);transform:translateY(calc(var(--sp-4) * -1))}
@media(min-width:768px){.trust-strip__inner{grid-template-columns:repeat(4,1fr)}}
.trust-strip{background:transparent}
.trust-strip__item{text-align:center}
.trust-strip__item strong{display:block;font-size:1.6rem;color:var(--accent);font-family:var(--font-head)}
.trust-strip__item span{font-size:.85rem;color:var(--text-muted)}
/* ============ CARDS (with gradient accents + emoji icon) ============ */
.card{display:block;position:relative;background:#fff;border:1px solid var(--border);border-radius:var(--r-md);padding:var(--sp-3);padding-left:calc(var(--sp-3) + 6px);box-shadow:var(--sh-sm);transition:transform .18s,box-shadow .18s,border-color .18s;color:inherit;overflow:hidden}
.card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:linear-gradient(180deg,var(--accent),var(--primary));transition:width .18s}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);text-decoration:none;border-color:var(--accent)}
.card:hover::before{width:8px}
.card h3{margin-bottom:var(--sp-1);display:flex;align-items:center;gap:.55rem;flex-wrap:wrap}
.card p{color:var(--text-muted);font-size:.95rem}
.card__link{color:var(--accent);font-weight:700;font-size:.9rem}
.card__ico{font-size:1.6rem;line-height:1;flex-shrink:0;display:inline-grid;place-items:center;width:2.2rem;height:2.2rem;border-radius:var(--r-sm);background:linear-gradient(135deg,rgba(29,46,74,.08),rgba(47,161,83,.12))}
/* Category-tinted cards (used on tools hub and home category grid) */
.card--tint{background:linear-gradient(135deg,#fff 0%,var(--tint,var(--surface)) 100%)}
.card--tint::before{background:var(--tintstripe,linear-gradient(180deg,var(--accent),var(--primary)))}
.card--cat{color:#fff;padding:var(--sp-3);padding-left:calc(var(--sp-3) + 6px);background:var(--catgrad,linear-gradient(160deg,var(--primary),var(--primary-dark)));border:0}
.card--cat::before{background:rgba(255,255,255,.35)}
.card--cat h3{color:#fff}
.card--cat p{color:rgba(255,255,255,.85)}
.card--cat .card__link{color:#fff}
.card--cat .card__ico{background:rgba(255,255,255,.18);color:#fff;font-size:1.8rem;width:2.6rem;height:2.6rem}
/* Category H2 icon badge */
.cat-h2-ico{display:inline-grid;place-items:center;width:2.4rem;height:2.4rem;border-radius:var(--r-sm);font-size:1.4rem;color:#fff;margin-right:.6rem;vertical-align:middle;box-shadow:var(--sh-sm)}
/* Tool page H1 icon */
.h1-ico{display:inline-grid;place-items:center;width:3rem;height:3rem;border-radius:var(--r-md);font-size:1.8rem;background:linear-gradient(135deg,rgba(29,46,74,.10),rgba(47,161,83,.15));margin-right:.7rem;vertical-align:middle}
/* ============ LISTS / STEPS / TABLE ============ */
.ticks{list-style:none;padding:0;margin:0 0 var(--sp-2)}
.ticks li{position:relative;padding-left:1.7rem;margin-bottom:.55rem}
.ticks li::before{content:"";position:absolute;left:0;top:.55em;width:.8rem;height:.45rem;border-left:3px solid var(--success);border-bottom:3px solid var(--success);transform:rotate(-45deg)}
.steps{counter-reset:s;list-style:none;padding:0;margin:0}
.steps li{counter-increment:s;position:relative;padding-left:3rem;margin-bottom:var(--sp-3)}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:2.1rem;height:2.1rem;border-radius:var(--r-full);background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:800}
.steps strong{display:block;color:var(--primary)}
.steps span{color:var(--text-muted)}
.chip-list{list-style:none;display:flex;flex-wrap:wrap;gap:.6rem;padding:0;margin:0}
.chip-list a{display:inline-block;padding:.45rem 1rem;background:var(--surface-2);border-radius:var(--r-full);font-size:.9rem;font-weight:600}
.chip-list a:hover{background:var(--primary);color:#fff;text-decoration:none}
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.95rem}
th,td{padding:.75rem;border-bottom:1px solid var(--border);text-align:left}
th{background:var(--surface-2);color:var(--primary)}
.answer-box{background:var(--surface-2);border-left:4px solid var(--accent);padding:var(--sp-3);border-radius:var(--r-sm);font-size:1.08rem}
/* ============ FAQ ============ */
.faq__item{border:1px solid var(--border);border-radius:var(--r-sm);margin-bottom:.75rem;background:#fff}
.faq__item summary{cursor:pointer;padding:1rem 1.2rem;font-weight:700;color:var(--primary);list-style:none;position:relative;padding-right:2.6rem}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary::after{content:"+";position:absolute;right:1.2rem;font-size:1.4rem;color:var(--accent)}
.faq__item[open] summary::after{content:"\2013"}
.faq__a{padding:0 1.2rem 1rem}
/* ============ CTA BAND ============ */
.cta-band{background:var(--primary);color:#fff;padding:var(--sp-5) 0;text-align:center}
.cta-band h2{color:#fff}
.cta-band p{opacity:.9;max-width:54ch;margin-inline:auto}
.cta-band .btn-row{justify-content:center}
.cta-band .btn--ghost{color:#fff}
/* ============ BREADCRUMBS ============ */
.crumbs{padding-top:var(--sp-2)}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem;padding:0;margin:0;font-size:.85rem;color:var(--text-muted)}
.crumbs li+li::before{content:"/";margin-right:.4rem;color:var(--border)}
/* ============ FOOTER ============ */
.site-footer{background:var(--primary-dark);color:#C9D2E0;padding:var(--sp-5) 0 var(--sp-2);margin-bottom:60px}
.site-footer h3{color:#fff;font-size:1rem;margin-bottom:var(--sp-2)}
.site-footer a{color:#C9D2E0;font-size:.92rem}
.site-footer a:hover{color:#fff}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:.45rem}
.footer__grid{display:grid;gap:var(--sp-3);grid-template-columns:1fr;align-items:stretch}
@media(min-width:768px){.footer__grid{grid-template-columns:repeat(4,1fr)}}
.footer__col{display:flex;flex-direction:column;background:rgba(255,255,255,.03);padding:var(--sp-3);border-radius:var(--r-md);border:1px solid rgba(255,255,255,.08)}
.footer__col h3{color:#fff;font-size:1rem;margin-bottom:var(--sp-2);padding-bottom:.6rem;border-bottom:2px solid var(--accent);display:inline-block}
.footer__logo{background:#fff;padding:.7rem 1rem;border-radius:var(--r-sm);display:inline-block;margin-bottom:var(--sp-2);align-self:flex-start}
.footer__logo img{display:block}
.footer__desc{font-size:.88rem;line-height:1.55;color:#C9D2E0;margin-bottom:.75rem}
.footer__desc:last-child{margin-bottom:0;margin-top:auto}
.footer__report{color:var(--accent);border-bottom:1px dashed rgba(47,161,83,.4);padding-bottom:1px}
.footer__report:hover{color:#fff;border-bottom-color:#fff;text-decoration:none}
.footer__bottom{padding-top:var(--sp-3);border-top:1px solid rgba(255,255,255,.12);margin-top:var(--sp-3);text-align:center}
/* ============ STICKY CALL ============ */
.sticky-call{position:fixed;bottom:0;left:0;right:0;z-index:60;background:var(--accent);color:#fff;text-align:center;padding:1rem;font-weight:800;box-shadow:0 -2px 12px rgba(0,0,0,.18)}
.sticky-call:hover{background:var(--accent-dark);color:#fff;text-decoration:none}
@media(min-width:900px){.sticky-call{display:none} .site-footer{margin-bottom:0}}
/* ============ MOTION ============ */
html{scroll-behavior:smooth}
section[id],h2[id]{scroll-margin-top:150px}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media(max-width:899px){.back-top{bottom:5rem;right:.8rem}}
@media(prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}
  .reveal.is-in{opacity:1;transform:none}
}
/* ============ TOOL (mode: tool) ============ */
.tool{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:var(--sp-3);box-shadow:var(--sh-sm);max-width:100%;overflow:hidden}
.tool__row{display:grid;gap:.35rem;margin-bottom:var(--sp-2);min-width:0}
@media(min-width:560px){.tool__row{grid-template-columns:180px 1fr;align-items:center;gap:var(--sp-2)}}
.tool__row label{font-weight:600;font-size:.92rem;color:var(--primary)}
.tool__row input,.tool__row select{padding:.75rem;border:1px solid var(--border);border-radius:var(--r-sm);font:inherit;background:#fff;width:100%;min-width:0;box-sizing:border-box}
.tool__out{display:block;margin-top:var(--sp-2);padding:var(--sp-3);background:var(--primary);color:#fff;border-radius:var(--r-md);font-size:1.8rem;font-weight:800;font-family:var(--font-head);text-align:center}
.tool__note{font-size:.85rem;color:var(--text-muted);margin-top:var(--sp-1)}
.tool__grid{display:grid;gap:var(--sp-2);min-width:0}
@media(min-width:560px){.tool__grid--2{grid-template-columns:1fr 1fr}.tool__grid--3{grid-template-columns:1fr 1fr 1fr}}
/* Rows nested inside a 2/3-col grid must stack label-above-input — the 180px-label
   layout above only fits a full-width row; forcing it into a narrow grid cell pushed
   inputs past the card edge (e.g. time inputs on calculadora-de-horas). */
.tool__grid .tool__row{grid-template-columns:1fr;min-width:0}
.tool__grid .tool__row input,.tool__grid .tool__row select{min-width:0}
@media(max-width:559px){.tool__grid--2,.tool__grid--3{grid-template-columns:1fr}}
.tool__area{width:100%;min-height:120px;padding:.75rem;border:1px solid var(--border);border-radius:var(--r-sm);font:inherit;background:#fff;resize:vertical}
.tool__area--mono{font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;font-size:.95rem}
.tool__actions{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:var(--sp-2)}
.tool__hint{font-size:.85rem;color:var(--text-muted);margin:.2rem 0 0}
.tool__error{color:var(--danger);font-weight:600;font-size:.9rem;margin-top:.4rem;min-height:1.1em}
.out--mono{font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;font-size:1.25rem;word-break:break-all;line-height:1.5}
.out--list{text-align:left;font-size:1.05rem}
.out--list div{padding:.35rem .2rem;border-bottom:1px solid rgba(255,255,255,.14);display:flex;justify-content:space-between;gap:1rem}
.out--list div:last-child{border-bottom:0}
/* buttons for tools */
.btn--sm{padding:.5rem 1rem;font-size:.85rem}
.btn--soft{background:var(--surface-2);color:var(--primary)}
.btn--soft:hover{background:var(--primary);color:#fff}
.btn--copy::before{content:"⧉ "}
.is-copied::before{content:"✓ "}
/* mode toggle (tabs) */
.mode-toggle{display:inline-flex;flex-wrap:wrap;gap:.3rem;background:var(--surface-2);padding:.3rem;border-radius:var(--r-full);margin-bottom:var(--sp-3)}
.mode-toggle button{border:0;background:transparent;padding:.5rem 1.1rem;border-radius:var(--r-full);font:inherit;font-weight:600;font-size:.9rem;cursor:pointer;color:var(--text-muted)}
.mode-toggle button[aria-selected="true"]{background:#fff;color:var(--primary);box-shadow:var(--sh-sm)}
/* result meta rows */
.result-rows{display:grid;gap:.5rem;margin-top:var(--sp-2)}
.result-rows .rr{display:flex;justify-content:space-between;gap:1rem;padding:.6rem .9rem;background:var(--surface-2);border-radius:var(--r-sm)}
.result-rows .rr strong{color:var(--primary)}
.result-rows .rr--total{background:var(--primary);color:#fff}
.result-rows .rr--total strong{color:#fff}
/* answer variants */
.answer-box--warn{background:#FDF4E7;border-left-color:var(--gold)}
/* disclaimer + source blocks (the wedge) */
.disclaimer{background:#FBEDE9;border:1px solid #F1C9BE;border-left:4px solid var(--danger);border-radius:var(--r-sm);padding:var(--sp-2) var(--sp-3);margin-top:var(--sp-2);font-size:.95rem;color:#7A2A19}
.disclaimer strong{color:#a8371f}
.tool__privacy{font-size:.82rem;color:var(--text-muted);margin:.5rem 0 0;text-align:center}
.source-note{font-size:.9rem;color:var(--text-muted);margin-top:var(--sp-2);background:var(--surface-2);padding:.6rem .9rem;border-radius:var(--r-sm)}
.source-note .verified{color:#146B3D;font-weight:700}
.source-note a{font-weight:600}
/* Rate editor collapsible (custom rate overrides on tax/rate tools) */
.rate-editor{margin-top:var(--sp-3);background:linear-gradient(135deg,#FDF9EF,#FFF);border:1px dashed var(--gold);border-radius:var(--r-md);padding:var(--sp-2) var(--sp-3)}
.rate-editor summary{cursor:pointer;font-weight:700;color:var(--primary);padding:.35rem 0;list-style:none}
.rate-editor summary::-webkit-details-marker{display:none}
.rate-editor summary::before{content:"▸ ";color:var(--accent-dark);font-size:.9em}
.rate-editor[open] summary::before{content:"▾ "}
.rate-editor .tool__hint{color:var(--text-muted);font-size:.85rem;margin:.4rem 0 .8rem}
.rate-editor input{background:#fff}
/* formula callout */
.formula{background:var(--surface);border:1px dashed var(--border);border-radius:var(--r-sm);padding:var(--sp-2) var(--sp-3);font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;font-size:.95rem;overflow-x:auto;margin:0 0 var(--sp-2)}
.formula strong{font-family:var(--font-head)}
/* small key/pill */
.kbd{display:inline-block;padding:.05rem .45rem;border:1px solid var(--border);border-bottom-width:2px;border-radius:6px;background:var(--surface);font-family:ui-monospace,monospace;font-size:.85em}
.pill{display:inline-block;padding:.15rem .7rem;border-radius:var(--r-full);background:var(--surface-2);font-size:.8rem;font-weight:700;color:var(--primary)}
.pill--ok{background:#E4F4EC;color:#146B3D} .pill--no{background:#FBEDE9;color:#A8371F}
/* resistor bands */
.bands{display:flex;gap:.4rem;justify-content:center;margin:var(--sp-2) 0}
.band{width:26px;height:70px;border-radius:4px;border:1px solid rgba(0,0,0,.15);box-shadow:var(--sh-sm)}
/* print grids (caça-palavras, bingo) */
.print-grid{display:grid;gap:2px;justify-content:center;margin:var(--sp-2) 0;font-family:ui-monospace,monospace}
.print-grid span{width:1.9rem;height:1.9rem;display:grid;place-items:center;border:1px solid var(--border);text-transform:uppercase;font-weight:600}
.bingo{display:grid;grid-template-columns:repeat(5,1fr);gap:2px;max-width:360px;margin:var(--sp-2) auto}
.bingo span{aspect-ratio:1;display:grid;place-items:center;border:1px solid var(--primary);font-weight:700}
.bingo .free{background:var(--surface-2);font-size:.7rem}
@media print{
  .site-header,.site-footer,.cta-band,.crumbs,.faq,.tool__actions,.answer-box,.section--tight .lead{display:none!important}
  body{font-size:12pt}
}
/* monitor test overlay */
.monitor-overlay{position:fixed;inset:0;z-index:9999;display:none}
.monitor-overlay.is-on{display:block}
.monitor-overlay .mo-hint{position:fixed;top:1rem;left:50%;transform:translateX(-50%);background:rgba(0,0,0,.7);color:#fff;padding:.5rem 1rem;border-radius:var(--r-full);font-size:.85rem}
/* piano/chord diagram */
.chord-diagram{display:inline-block;margin:.4rem}
/* HP-12C emulator */
.hp-display{background:#12305B;color:#d7e4c8;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:1.8rem;text-align:right;padding:.8rem 1rem;border-radius:var(--r-sm);letter-spacing:.05em;overflow-x:auto}
.hp-regs{display:flex;flex-wrap:wrap;gap:.4rem;margin:.5rem 0;font-size:.8rem}
.hp-regs span{background:var(--surface-2);padding:.25rem .6rem;border-radius:var(--r-full)}
.hp-pad{display:grid;grid-template-columns:repeat(5,1fr);gap:.4rem;margin-top:.5rem}
.hp-key{padding:.7rem .2rem;border:1px solid var(--border);border-radius:var(--r-sm);background:#fff;font-weight:700;font-size:.95rem;cursor:pointer;color:var(--primary);font-family:inherit}
.hp-key:hover{background:var(--surface-2)}
.hp-key--op{background:var(--primary);color:#fff}
.hp-key--fn{background:var(--surface-2);font-size:.8rem}
.hp-key--tvm{background:#E9EFF6;color:var(--primary);font-size:.85rem}
.hp-key--enter{grid-column:span 2}