:root{--bg:#0b1020;--card:#121a2e;--bd:#1f2a44;--tx:#f4f6ff;--mu:#c4cde3;--ac:#7657f0;--ac2:#79a7ff;--ok:#22c55e;--wa:#f59e0b;--er:#ef4444;--g:linear-gradient(90deg,#6546df,#245fc7)}
[data-theme=light]{--bg:#f4f6fc;--card:#fff;--bd:#dfe4f1;--tx:#12182b;--mu:#37415c;--ac:#4d2dc9;--ac2:#245fce;--g:linear-gradient(90deg,#4d2dc9,#1f55b5)}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--tx);font:15px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}main{display:block;min-height:100vh}
button,input,select{font:inherit;color:inherit}button{cursor:pointer}
:focus-visible{outline:2px solid var(--ac2);outline-offset:2px}.skip-link{position:absolute;left:8px;top:-100px;z-index:100;background:var(--card);color:var(--tx);padding:10px 14px;border:2px solid var(--ac2);border-radius:8px}.skip-link:focus{top:8px}
#app{max-width:520px;margin:0 auto;padding:16px 16px calc(90px + env(safe-area-inset-bottom))}
h1{font-size:28px;line-height:1.15;margin:16px 0 8px}h1 b{color:var(--ac)}h2{font-size:16px;margin:22px 0 10px}
.mu{color:var(--mu);font-size:13px}.row{display:flex;align-items:center;gap:10px}.sp{justify-content:space-between}
.top{display:flex;justify-content:space-between;align-items:center;gap:8px}
.logo{display:flex;gap:8px;align-items:center;font-weight:700;font-size:18px}.logo i{width:30px;height:30px;border-radius:8px;background:var(--g);display:grid;place-items:center}
.ib{min-width:44px;min-height:44px;border-radius:12px;border:1px solid var(--bd);background:var(--card);display:grid;place-items:center}
svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.card{background:var(--card);border:1px solid var(--bd);border-radius:16px;padding:16px;margin:12px 0}
.search{display:flex;gap:8px;background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:6px 6px 6px 14px}
.search input{flex:1;background:none;border:0;min-width:0;outline:0}.search button{background:var(--ac);border:0;color:#fff;border-radius:10px;width:44px;height:40px}
.chips{display:flex;gap:8px;overflow-x:auto;padding:10px 0}.chip{white-space:nowrap;border:1px solid var(--bd);background:var(--card);border-radius:20px;padding:8px 14px;min-height:40px}
.chip.on{background:var(--ac);border-color:var(--ac);color:#fff}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.cc{display:flex;flex-direction:column;gap:6px;text-align:left;background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:14px;transition:.15s}
.cc[href]{color:inherit;text-decoration:none;cursor:pointer}
.cc:hover{border-color:var(--ac)}.cc:active{transform:scale(.97)}.cc small{color:var(--mu)}
.ico{width:44px;height:44px;border-radius:12px;background:rgba(124,92,255,.16);color:var(--ac);display:grid;place-items:center}
.list .cc{flex-direction:row;align-items:center;gap:12px;margin-bottom:8px}.list .cc div{flex:1}
label{display:block;font-size:13px;color:var(--mu);margin:14px 0 6px}
.in{display:flex;align-items:center;background:var(--bg);border:1px solid var(--bd);border-radius:10px;min-height:46px;padding:0 12px;gap:6px}
.in input,.in select{flex:1;background:none;border:0;outline:0;min-width:0;min-height:44px}.in select option{color:#000}
.in:focus-within{border-color:var(--ac2)}
.step{display:flex;gap:8px}.step{min-width:0}.step button{flex:none;width:48px;min-height:46px;border-radius:10px;border:1px solid var(--bd);background:var(--bg);font-size:20px}.step input{flex:1;width:0;min-width:0;text-align:center;min-height:46px;background:var(--bg);border:1px solid var(--bd);border-radius:10px}.top b{min-width:0;overflow-wrap:anywhere;text-align:center}@media(max-width:360px){#app{padding-left:12px;padding-right:12px}.card{padding:12px}}
.btn{width:100%;min-height:46px;border:0;border-radius:11px;background:var(--g);color:#fff;font-weight:600;margin-top:18px}
.btn.s{background:var(--card);border:1px solid var(--bd);color:var(--tx);margin:0}
.two{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
.err{color:var(--er);font-size:13px;margin-top:10px}.big{font-size:34px;font-weight:700;color:var(--ok);margin:6px 0}
.kv{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px solid var(--bd)}.kv:last-child{border:0;font-weight:700}
.tabs{display:grid;grid-template-columns:1fr 1fr;background:var(--card);border:1px solid var(--bd);border-radius:12px;padding:4px;margin:12px 0}
.tabs button{min-height:40px;border:0;background:none;border-radius:9px}.tabs .on{background:var(--g);color:#fff}
nav{position:fixed;left:0;right:0;bottom:0;display:flex;justify-content:space-around;background:var(--card);border-top:1px solid var(--bd);padding:8px 4px calc(8px + env(safe-area-inset-bottom));z-index:5}
nav a{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:11px;color:var(--mu);text-decoration:none;min-width:56px;min-height:44px}nav a.on{color:var(--ac2);font-weight:700}
.mu,.cc small,label,.ad,nav a{color:var(--mu)}

#toast{position:fixed;left:50%;bottom:100px;transform:translateX(-50%);background:#222c47;color:#fff;padding:10px 16px;border-radius:10px;opacity:0;pointer-events:none;transition:.25s;z-index:9}#toast.show{opacity:1}
.ad{border:1px dashed var(--bd);border-radius:10px;text-align:center;color:var(--mu);font-size:11px;padding:14px;margin:14px 0}
#qr{display:grid;place-items:center;background:#fff;padding:12px;border-radius:12px;width:min(100%,232px);aspect-ratio:1/1;box-sizing:border-box;margin:10px auto;overflow:hidden}#qr svg{width:100%;height:100%;display:block}.two>*{min-width:0}.card{overflow-wrap:anywhere}
@media(min-width:900px){#app{max-width:980px;padding-left:110px}nav{top:0;bottom:auto;right:auto;width:90px;flex-direction:column;justify-content:flex-start;gap:12px;padding:20px 4px;border-top:0;border-right:1px solid var(--bd)}.grid{grid-template-columns:repeat(3,1fr)}#res{position:sticky;top:16px}.dual{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* SEO content, how-to instructions and FAQ accordions */
.seo-info, .faq {
  margin: clamp(20px, 4vw, 32px) 0;
  padding: clamp(16px, 3vw, 24px);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: 16px;
  box-sizing: border-box;
}

.seo-info h2, .faq h2 {
  margin: 0 0 12px;
  font-size: clamp(18px, 2.5vw, 22px);
  font-weight: 700;
  color: var(--tx);
  letter-spacing: -0.02em;
}

.seo-info p, .seo-info li, .faq-item p {
  color: var(--mu);
  font-size: clamp(14px, 1.8vw, 15px);
  line-height: 1.65;
}

.seo-info p {
  margin: 0 0 14px;
}

.seo-info ol {
  padding-left: 20px;
  margin: 10px 0 16px;
}

.seo-info li {
  padding: 4px 0;
}

/* FAQ Item Accordion styling */
.faq-item {
  margin: 12px 0;
  background: var(--bg);
  border: 1px solid var(--bd);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item[open] {
  border-color: var(--ac2);
}

.faq-item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  color: var(--tx);
  font-weight: 600;
  line-height: 1.4;
  list-style: none; /* Removes default native marker */
  user-select: none;
}

/* Custom interactive disclosure indicator arrow */
.faq-item summary::after {
  content: "";
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--mu);
  border-bottom: 2px solid var(--mu);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(-135deg);
  border-color: var(--ac2);
}

/* Standard fallback block hiding for legacy configurations */
.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:focus-visible {
  outline: 2px solid var(--ac2);
  outline-offset: -2px;
  background: rgba(var(--ac2), 0.05);
}

.faq-item p {
  margin: 0;
  padding: 0 16px 16px;
  animation: faqFadeIn 0.25s ease-out;
}

/* Smooth expansion fallback helper animation */
@keyframes faqFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}







/* =========================================
   SmartCalc — Responsive Shared Footer
   Works with the existing .site-footer HTML
========================================= */

.site-footer {
  --footer-purple: #4f32d8;
  --footer-text: #172033;
  --footer-muted: #4b5670;
  --footer-border: #dce3f2;
  --footer-surface: #ffffff;

  width: 100%;
  margin-top: 40px;
  color: var(--footer-text);
  background: var(--footer-surface);
  border-top: 1px solid var(--footer-border);
  font-family: inherit;
  box-sizing: border-box;
}

.site-footer *,
.site-footer *::before,
.site-footer *::after {
  box-sizing: border-box;
}

.site-footer .footer-inner {
  width: min(100% - 40px, 1180px);
  margin-inline: auto;
  padding: 36px 0;
  display: grid;
  grid-template-columns: minmax(220px, 1.7fr) repeat(3, minmax(130px, 1fr));
  gap: 32px;
  align-items: start;
}

/* Brand */

.site-footer .footer-brand {
  min-width: 0;
}

.site-footer .footer-logo {
  display: inline-block;
  color: var(--footer-text);
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.6px;
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-footer .footer-logo:hover {
  color: var(--footer-purple);
}

.site-footer .footer-brand p {
  max-width: 280px;
  margin: 12px 0 0;
  color: var(--footer-muted);
  font-size: 14px;
  line-height: 1.75;
}

/* Footer columns */

.site-footer .footer-column {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 11px;
  min-width: 0;
}

.site-footer .footer-column h3 {
  margin: 2px 0 7px;
  color: var(--footer-text);
  font-size: 14px;
  font-weight: 750;
  line-height: 1.4;
}

.site-footer .footer-column a {
  display: inline-block;
  max-width: 100%;
  color: var(--footer-muted);
  font-size: 13px;
  line-height: 1.6;
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: color 0.2s ease, transform 0.2s ease;
}

.site-footer .footer-column a:hover {
  color: var(--footer-purple);
  transform: translateX(2px);
}

/* Copyright bar */

.site-footer .footer-bottom {
  width: min(100% - 40px, 1180px);
  margin-inline: auto;
  padding: 18px 0;
  border-top: 1px solid var(--footer-border);
  text-align: center;
}

.site-footer .footer-bottom p {
  margin: 0;
  color: var(--footer-muted);
  font-size: 12px;
  line-height: 1.7;
}

/* Tablet */

@media (max-width: 760px) {
  .site-footer {
    margin-top: 30px;
  }

  .site-footer .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 24px;
    padding: 30px 0;
  }

  .site-footer .footer-brand {
    grid-column: 1 / -1;
  }

  .site-footer .footer-brand p {
    max-width: 400px;
  }
}

/* Mobile */

@media (max-width: 420px) {
  .site-footer .footer-inner,
  .site-footer .footer-bottom {
    width: calc(100% - 32px);
  }

  .site-footer .footer-inner {
    gap: 25px 16px;
    padding: 26px 0;
  }

  .site-footer .footer-logo {
    font-size: 19px;
  }

  .site-footer .footer-brand p {
    font-size: 13px;
  }

  .site-footer .footer-column {
    gap: 10px;
  }

  .site-footer .footer-column h3 {
    font-size: 13px;
  }

  .site-footer .footer-column a {
    font-size: 12px;
  }

  .site-footer .footer-bottom {
    padding: 15px 0;
  }
}

/* Optional dark theme support */
html.dark .site-footer,
body.dark .site-footer,
[data-theme="dark"] .site-footer {
  --footer-text: #edf0ff;
  --footer-muted: #a6b0c8;
  --footer-border: #29334a;
  --footer-surface: #151b2b;
}

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
  .site-footer *,
  .site-footer *::before,
  .site-footer *::after {
    transition: none !important;
  }
}

/* SmartCalc footer logo with lightning icon */
.site-footer .footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--footer-text, #172033);
  font-size: 21px;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
}

.site-footer .footer-logo-icon {
  display: block;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  border-radius: 9px;
}

.site-footer .footer-logo span {
  display: inline-block;
}

.site-footer .footer-logo:hover {
  color: #7c5cff;
}

.site-footer .footer-logo:focus-visible {
  outline: 2px solid #7c5cff;
  outline-offset: 4px;
  border-radius: 4px;
}

@media (max-width: 420px) {
  .site-footer .footer-logo {
    gap: 8px;
    font-size: 19px;
  }

  .site-footer .footer-logo-icon {
    width: 30px;
    height: 30px;
    flex-basis: 30px;
    border-radius: 8px;
  }
}

/* Language selector in the existing top bar */
.lang-switch {
  width: auto;
  max-width: 105px;
  min-width: 0;
  padding: 7px 5px;
  border: 1px solid var(--line, #64748b);
  border-radius: 8px;
  background: var(--card, #fff);
  color: inherit;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.top {
  min-width: 0;
}

.top > b {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 380px) {
  .lang-switch {
    max-width: 82px;
    font-size: 11px;
    padding: 6px 2px;
  }
}