:root {
  --bg: #0f1420;
  --card: #171e2e;
  --border: #263049;
  --text: #e8ecf4;
  --muted: #9aa4bd;
  --accent: #4f8cff;
  --accent2: #8b5cf6;
  --glow: rgba(79, 140, 255, .35);
  --accent-soft: rgba(79, 140, 255, .12);
  --ok: #3ddc84;
  --err: #ff6b6b;
  --radius: 14px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
/* Critical: [hidden] must beat display:flex utilities like .result-row */
[hidden] { display: none !important; }
html { scroll-padding-top: 96px; }
::selection { background: var(--glow); }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(15, 20, 32, .9);
  position: sticky; top: 0; z-index: 10;
}
.nav {
  max-width: 860px; margin: 0 auto; padding: .8rem 1rem;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: nowrap; gap: .8rem;
}
.nav-links { display: flex; gap: .4rem; flex-wrap: nowrap; overflow-x: auto; align-items: center; scrollbar-width: thin; }
.nav-links a, .nav-links .lang-select { flex-shrink: 0; }
.brand { font-weight: 800; font-size: 1.15rem; color: var(--text); text-decoration: none; }
.brand:hover { color: var(--accent); }
.nav-links { display: flex; gap: .4rem; }
.nav-links a {
  color: var(--muted); text-decoration: none; font-size: .92rem;
  padding: .45rem .8rem; border-radius: 8px;
}
.nav-links a:hover { color: var(--text); background: var(--accent-soft); }
.nav-links a.active { color: var(--text); background: var(--accent-soft); }
.lang-select {
  background: var(--card); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: .65rem .7rem; font-size: 1rem; cursor: pointer; min-height: 44px;
}
.lang-select:hover { border-color: var(--accent); }
.lang-select option { background: var(--card); }
main { max-width: 860px; margin: 0 auto; padding: 1rem 1rem 3rem; }
.hero { text-align: center; padding: 2.2rem 0 1.4rem; }
.hero h1 { font-size: clamp(1.7rem, 4.5vw, 2.5rem); margin: 0 0 .5rem; letter-spacing: -.02em; }
.hero .sub { color: var(--muted); margin: 0 auto; max-width: 34rem; }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.4rem; margin-bottom: 1.4rem;
}
.tool label { display: block; font-weight: 600; margin-bottom: .5rem; }
.tool input {
  width: 100%; font-size: 1.25rem; padding: .8rem 1rem;
  border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-family: ui-monospace, monospace;
}
.tool input:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.error { color: var(--err); font-size: .9rem; margin: .4rem 0 0; }
.result-row { display: flex; gap: .7rem; margin-top: 1rem; align-items: stretch; }
.result-box {
  flex: 1; background: var(--accent-soft); border: 1px solid var(--accent);
  border-radius: 10px; padding: .8rem 1rem; min-width: 0;
}
.result-label { display: block; font-size: .78rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.result-box output {
  display: block; font-size: 1.5rem; font-weight: 700;
  font-family: ui-monospace, monospace; word-break: break-all;
}
.btn {
  border: none; border-radius: 10px; padding: .8rem 1.2rem;
  font-size: 1rem; font-weight: 600; cursor: pointer;
  background: var(--accent); color: #fff;
}
.btn.secondary { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn.secondary:hover { border-color: var(--accent); color: var(--accent); }
.bits-row { display: flex; align-items: center; gap: .7rem; margin-top: 1rem; flex-wrap: wrap; color: var(--muted); font-size: .95rem; }
.bits { display: flex; gap: .4rem; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--border); background: transparent; color: var(--muted);
  border-radius: 999px; padding: .7rem 1.1rem; cursor: pointer; font-size: .9rem;
  min-height: 44px;
}
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.breakdown { margin-top: 1.2rem; border-top: 1px solid var(--border); padding-top: 1rem; }
.breakdown h2 { font-size: 1.1rem; margin: 0 0 .6rem; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; padding: .5rem .6rem; border-bottom: 1px solid var(--border); font-family: ui-monospace, monospace; }
th { color: var(--muted); font-family: inherit; font-weight: 600; font-size: .85rem; text-transform: uppercase; letter-spacing: .05em; }
.sum { color: var(--muted); font-size: .95rem; }
.content h2 { font-size: 1.45rem; margin: 1.6rem 0 .6rem; letter-spacing: -.015em; }
.content h2:first-child { margin-top: 0; }
.content h3 { font-size: 1.05rem; margin: 1.1rem 0 .3rem; }
.content p, .content li { color: #c9d1e3; }
.content a { color: var(--accent); }
.site-footer {
  text-align: center; color: var(--muted); font-size: .88rem;
  padding: 1.6rem 1rem 2.4rem; border-top: 1px solid var(--border);
}
.site-footer a { color: var(--muted); }
@media (max-width: 560px) {
  .result-row { flex-direction: column; }
  .btn.secondary { width: 100%; }
}

/* Extra tool pages */
.tool textarea {
  width: 100%; font-size: 1.1rem; padding: .8rem 1rem;
  border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-family: ui-monospace, monospace;
  resize: vertical;
}
.tool textarea:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.result-row .result {
  flex: 1; font-size: 1.2rem; padding: .8rem 1rem;
  border-radius: 10px; border: 1px solid var(--accent);
  background: var(--accent-soft); color: var(--text); font-family: ui-monospace, monospace;
  min-width: 0;
}
.copy-btn {
  border: 1px solid var(--border); background: transparent; color: var(--text);
  border-radius: 10px; padding: .8rem 1.1rem; font-size: 1.2rem; cursor: pointer;
}
.copy-btn:hover { border-color: var(--accent); color: var(--accent); }
.table-wrap { overflow-x: auto; }
/* Contain unwrapped tables on narrow screens: internal scroll, never page overflow */
.card table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.more-tools h2 { font-size: 1.2rem; margin: 0 0 .8rem; }
.tools-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: .6rem; }
.tools-grid a {
  display: block; padding: .8rem .6rem; border: 1px solid var(--border);
  border-radius: 10px; color: var(--text); text-decoration: none;
  text-align: center; font-weight: 600; font-size: .92rem;
  min-width: 0; overflow-wrap: break-word;
}
.tools-grid a:hover { border-color: var(--accent); color: var(--accent); }
.tools-grid a strong { display: block; margin-bottom: .25rem; }
.tools-grid a span { display: block; font-weight: 400; font-size: .8rem; color: var(--muted); line-height: 1.35; }
/* AdSense slot: hidden until a real publisher ID is configured.
   When ads go live, delete `display: none` below. */
.ad-slot {
  display: none;
  margin: 0 0 1.4rem; min-height: 90px;
  align-items: center; justify-content: center;
  border: 1px dashed var(--border); border-radius: var(--radius);
}
.ad-slot .adsbygoogle { width: 100%; }
.nav-links { align-items: center; }

/* "Also equals" multi-base box */
.also-list { margin: 0; display: grid; gap: 0.5rem; }
.also-row { display: flex; align-items: baseline; gap: 0.75rem; margin: 0; }
.also-row dt { min-width: 5.5rem; color: var(--muted); font-weight: 600; }
.also-row dd { margin: 0; overflow-wrap: anywhere; }
.also-row code { font-size: 1.05rem; }

/* Blog */
.post-meta { color: var(--muted); font-size: .95rem; margin-top: .4rem; }
.post-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 1.4rem; }
.post-list h3 { margin: 0 0 .3rem; font-size: 1.15rem; }
.post-list h3 a { color: var(--accent); text-decoration: none; }
.post-list h3 a:hover { text-decoration: underline; }
.post-list .post-date { color: var(--muted); font-size: .85rem; }
.post-list p { margin: .4rem 0 0; color: var(--text); }
/* Blog cards: binary-motif icon tile + text, clean flex row */
.post-list li { display: flex; gap: 1rem; align-items: flex-start; }
.post-icon {
  flex: none; width: 2.75rem; height: 2.75rem; border-radius: .8rem;
  background: rgba(79, 140, 255, .12); border: 1px solid rgba(79, 140, 255, .28);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--accent); margin-top: .15rem;
}
.post-icon svg { display: block; }
.post-body { min-width: 0; }
.cta-box { border: 2px solid var(--accent); border-radius: 12px; padding: 1.3rem 1.4rem; margin: 2rem 0; text-align: center; }
.cta-box p { margin: 0 0 1rem; font-size: 1.05rem; }
.cta-box .btn { display: inline-block; text-decoration: none; color: #fff; }
.cta-box .btn:visited { color: #fff; }

/* Option rows: checkboxes, notes, calculator fields */
.check-row { display: flex; align-items: center; gap: .55rem; margin-top: .9rem; color: var(--muted); font-size: .95rem; cursor: pointer; }
.check-row input[type="checkbox"] { width: 1.1rem; height: 1.1rem; accent-color: var(--accent); cursor: pointer; flex: none; }
.note { color: var(--muted); font-size: .88rem; margin: .5rem 0 0; }
.field { margin-top: 1rem; }
.field label { display: block; font-weight: 600; margin-bottom: .35rem; }
.op-select { width: 100%; font-size: 1.1rem; padding: .8rem 1rem; border-radius: 10px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font-family: inherit; }
.op-select:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.op-select option { background: var(--card); }

/* ---------- UX round (2026-10-03) ---------- */

/* TOC anchor offset: keep headings clear of the sticky header */
[id] { scroll-margin-top: 84px; }

/* Code blocks */
pre {
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 1rem; overflow-x: auto; font-size: .9rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
pre code { font-family: inherit; }

/* FAQ accordions */
.faq { border: 1px solid var(--border); border-radius: 10px; margin: 0 0 .6rem; background: var(--card); }
.faq summary {
  cursor: pointer; padding: .9rem 1.1rem; font-weight: 600; list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: .8rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::marker { content: ""; }
.faq summary::after { content: "+"; flex: none; color: var(--accent); font-size: 1.25rem; font-weight: 700; line-height: 1; }
.faq[open] summary::after { content: "\2212"; }
.faq .faq-a { padding: 0 1.1rem 1rem; margin: 0; color: #c9d1e3; }

/* Back-to-top button */
#toTop {
  position: fixed; right: 1.1rem; bottom: 1.1rem; z-index: 20;
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  font-size: 1.25rem; line-height: 1; cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .35);
}
#toTop:hover { border-color: var(--accent); color: var(--accent); }
#toTop[hidden] { display: none; }

/* Skip-to-content link (visually hidden until focused) */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: #fff; padding: .6rem 1rem;
  border-radius: 0 0 8px 0; font-weight: 600; text-decoration: none;
}
.skip-link:focus { left: 0; }

/* Visible keyboard focus */
a:focus-visible, button:focus-visible, .chip:focus-visible, summary:focus-visible,
input:focus-visible, textarea:focus-visible, select:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

/* Copy-button success flash */
.copied-ok {
  background: var(--ok) !important; border-color: var(--ok) !important;
  color: #06281a !important;
}

/* Header backdrop so content doesn't ghost through on scroll */
.site-header {
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

/* RTL-correct table alignment */
th, td { text-align: start; }

/* Larger tap targets */
.chip { padding: .7rem 1.1rem; min-height: 44px; }
.nav-links a { padding: .8rem .9rem; }

/* Embed snippet copy row */
.embed-copy-row { margin: .7rem 0 0; }

/* ============================================================
   Agency redesign (2026-10-03) — premium dark developer-tool
   aesthetic. CSS-only; no webfonts, no new image requests.
   ============================================================ */

/* ---------- Brand: SVG mark, single-line lockup ---------- */
.brand {
  display: inline-flex; align-items: center; gap: .5rem;
  white-space: nowrap; flex: none;
  font-weight: 800; font-size: 1.15rem; color: var(--text); text-decoration: none;
}
.brand:hover { color: var(--accent); }
.brand-mark { display: inline-flex; flex: none; }
.brand-mark svg { display: block; }

/* ---------- Header nav: hidden scrollbar + edge fades ---------- */
.nav-links {
  scrollbar-width: none;
  -ms-overflow-style: none;
  -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);
}
.nav-links::-webkit-scrollbar { display: none; }

/* ---------- Hero: badge, gradient H1, ambient glow, stats ---------- */
.hero { position: relative; }
.hero::before {
  content: ""; position: absolute; inset: -40px 0 0; pointer-events: none;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(79, 140, 255, .16), transparent 70%);
}
.hero > * { position: relative; z-index: 1; }
.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.4rem);
  font-weight: 800; letter-spacing: -.03em; line-height: 1.08;
  margin: 0 0 .6rem; color: #fff;
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .hero h1 {
    background: linear-gradient(180deg, #fff 30%, #b9ccff);
    -webkit-background-clip: text; background-clip: text; color: transparent;
  }
}
.hero-badge {
  display: inline-flex; align-items: center; gap: .5rem;
  background: var(--accent-soft); border: 1px solid rgba(79, 140, 255, .35);
  border-radius: 999px; padding: .35rem 1rem;
  font-size: .82rem; color: #b9ccff; margin: 0 0 1rem;
}
.pulse-dot {
  width: .5rem; height: .5rem; border-radius: 50%;
  background: var(--ok); flex: none;
  animation: bindec-pulse 2s ease-in-out infinite;
}
@keyframes bindec-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(61, 220, 132, .45); }
  50% { box-shadow: 0 0 0 6px rgba(61, 220, 132, 0); }
}
.hero-stats {
  display: flex; justify-content: center; align-items: center;
  gap: .8rem; flex-wrap: wrap;
  color: var(--muted); font-size: .88rem; margin: 1.1rem 0 0;
}
.hero-stats [aria-hidden="true"] { opacity: .6; }

/* ---------- Section headings: gradient underline bar ---------- */
.content h2::after {
  content: ""; display: block; width: 2.6rem; height: 3px;
  border-radius: 2px; margin-top: .45rem;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}

/* ---------- Converter card: gradient border + glow ---------- */
.tool.card {
  border: 1px solid transparent;
  background:
    linear-gradient(var(--card), var(--card)) padding-box,
    linear-gradient(135deg, rgba(79, 140, 255, .45), rgba(139, 92, 246, .28)) border-box;
  box-shadow: 0 12px 44px rgba(20, 40, 90, .45), 0 0 0 1px rgba(79, 140, 255, .06);
}

/* ---------- Buttons: gradient primary, lifted ghost ---------- */
.btn {
  background: linear-gradient(135deg, #4f8cff, #7c5cff);
  box-shadow: 0 4px 18px rgba(79, 140, 255, .35);
  transition: transform .15s ease, box-shadow .15s ease, background-color .15s ease, border-color .15s ease, color .15s ease;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 26px rgba(79, 140, 255, .45);
}
.btn:active { transform: none; box-shadow: 0 4px 18px rgba(79, 140, 255, .35); }
.btn.secondary { background: transparent; box-shadow: none; }
.btn.secondary:hover { transform: translateY(-1px); box-shadow: 0 4px 14px rgba(79, 140, 255, .28); }

/* Ghost chips: lift + glow on hover, background stays transparent by design */
.chip:hover { transform: translateY(-1px); box-shadow: 0 4px 14px rgba(79, 140, 255, .25); border-color: var(--accent); }

/* ---------- Link system: one accent, TOC unified ---------- */
.toc a { color: var(--accent); text-decoration: none; padding: .3rem 0; display: inline-block; }
.toc a:hover { text-decoration: underline; }

/* ---------- "Last updated" chip ---------- */
.post-meta {
  display: inline-flex; align-items: center; gap: .4rem;
  border: 1px solid var(--border); border-radius: 999px;
  padding: .3rem .9rem; font-size: .82rem;
  color: var(--muted); margin: .8rem 0 1.2rem;
}
.post-meta::before {
  content: ""; width: .45rem; height: .45rem;
  border-radius: 50%; background: var(--accent); flex: none;
}

/* ---------- Tables: contained, tinted head, row hover ---------- */
.table-wrap {
  border: 1px solid var(--border); border-radius: 12px;
  overflow-x: auto;
}
.table-wrap table { margin: 0; }
thead th { background: rgba(79, 140, 255, .07); }
tbody tr:hover { background: rgba(79, 140, 255, .05); }
.ref-table { width: 100%; max-width: none; }
.ref-table td:last-child { white-space: nowrap; }

/* ---------- Code windows: title bar + subtle highlighting ---------- */
.codeblock {
  border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; margin: 0 0 1.2rem; background: #0c111c;
}
.codeblock pre {
  border: 0; border-radius: 0; margin: 0;
  background: transparent; padding: 1rem 1.1rem;
}
.codebar {
  display: flex; align-items: center; gap: .45rem;
  padding: .55rem .9rem; border-bottom: 1px solid var(--border);
  font-size: .78rem; color: var(--muted); background: rgba(255, 255, 255, .02);
}
.codebar .cdot { width: .62rem; height: .62rem; border-radius: 50%; flex: none; }
.codebar .cdot:nth-child(1) { background: #ff5f57; }
.codebar .cdot:nth-child(2) { background: #febc2e; }
.codebar .cdot:nth-child(3) { background: #28c840; }
.codebar .clang {
  margin-inline-start: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  text-transform: uppercase; letter-spacing: .08em; font-size: .72rem;
}
.tok-c { color: #7d8a6f; font-style: italic; }
.tok-s { color: #e8b45a; }
.tok-k { color: #a78bfa; }
.tok-n { color: #f2995f; }

/* ---------- Structured footer ---------- */
.site-footer { padding: 2.4rem 1rem 2.8rem; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.5rem; max-width: 860px; margin: 0 auto; text-align: start;
}
.footer-brand .brand { margin-bottom: .2rem; }
.footer-tag { margin: .6rem 0 .3rem; color: var(--muted); font-size: .88rem; }
.footer-copy { margin: 0; color: var(--muted); font-size: .82rem; opacity: .8; }
.footer-h {
  font-weight: 700; font-size: .85rem; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text); margin: 0 0 .7rem;
}
.footer-nav { display: flex; flex-direction: column; gap: .45rem; align-items: flex-start; }
.footer-nav a { color: var(--muted); text-decoration: none; font-size: .9rem; padding: .35rem 0; }
.footer-nav a:hover { color: var(--accent); }
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- Micro-interactions ---------- */
a, button, .chip, .tools-grid a {
  transition: color .15s ease, background-color .15s ease, border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.tools-grid a:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(20, 40, 90, .45);
}
.tool input:focus, .tool textarea:focus, .op-select:focus {
  box-shadow: 0 0 0 3px rgba(79, 140, 255, .18);
}

/* ---------- FAQ open animation (keeps native <details>) ---------- */
.faq { display: grid; grid-template-rows: auto 0fr; transition: grid-template-rows .25s ease; }
.faq[open] { grid-template-rows: auto 1fr; }
.faq .faq-a {
  overflow: hidden; min-height: 0; margin: 0;
  padding: 0 1.1rem; color: #c9d1e3;
  transition: padding-bottom .25s ease;
}
.faq[open] .faq-a { padding-bottom: 1rem; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* Copy icon (SVG) inside icon-only copy buttons */
.copy-btn svg { display: block; width: 1.15em; height: 1.15em; }

/* ---------- Converter UX round (2026-10-03) ---------- */

/* Tool actions: Swap + Clear row under the input */
.tool-actions { display: flex; gap: .6rem; margin-top: .9rem; flex-wrap: wrap; }
.tool-actions .btn { padding: .72rem 1.05rem; font-size: .95rem; min-height: 44px; }

/* Recent conversions */
.recents { margin-top: 1.1rem; border-top: 1px solid var(--border); padding-top: .9rem; }
.recents-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: .55rem; gap: .6rem; }
.recents-head > span { font-size: .8rem; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); font-weight: 700; }
.recents-clear { background: none; border: none; color: var(--accent); cursor: pointer; font-size: .85rem; padding: .8rem .6rem; border-radius: 6px; min-height: 44px; }
.recents-clear:hover { text-decoration: underline; }
.recents-list { display: flex; flex-wrap: wrap; gap: .45rem; }
.recent-chip { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .83rem; border: 1px solid var(--border); background: transparent; color: var(--text); border-radius: 999px; padding: .75rem 1rem; cursor: pointer; max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-height: 44px; }
.recent-chip:hover { border-color: var(--accent); color: var(--accent); }
.recents-empty { color: var(--muted); font-size: .88rem; margin: .2rem 0 0; }

/* Base converter: from/to base row */
.base-row { display: flex; gap: .7rem; margin-top: 1rem; flex-wrap: wrap; align-items: flex-end; }
.base-sel { flex: 1 1 140px; min-width: 0; display: flex; flex-direction: column; gap: .35rem; }
.base-sel label { font-size: .85rem; color: var(--muted); font-weight: 600; }
.base-sel select { width: 100%; font-size: 1rem; padding: .72rem .8rem; border-radius: 10px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font-family: inherit; cursor: pointer; min-height: 44px; }
.base-sel select:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.base-swap { flex: none; align-self: flex-end; }

/* Privacy badge */
.privacy-badge { display: flex; align-items: center; gap: .45rem; color: var(--muted); font-size: .82rem; margin: .95rem 0 0; }
.privacy-badge svg { flex: none; width: 14px; height: 14px; }

/* Theme toggle */
.theme-toggle { background: transparent; border: 1px solid var(--border); border-radius: 8px; color: var(--muted); cursor: pointer; padding: .45rem .55rem; display: inline-flex; align-items: center; justify-content: center; flex: none; min-width: 44px; min-height: 44px; }
.theme-toggle:hover { color: var(--text); border-color: var(--accent); }
.theme-toggle svg { width: 17px; height: 17px; display: block; }
.theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Interactive digit chips (flagship converters) */
.digit-chips { display: flex; flex-wrap: wrap; gap: .3rem; margin: .8rem 0 .5rem; }
.digit-chip { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .8rem; min-width: 1.7rem; text-align: center; padding: .28rem .3rem; border: 1px solid var(--border); border-radius: 6px; color: var(--muted); background: var(--bg); }
.digit-chip.hl { background: var(--accent-soft); border-color: var(--accent); color: var(--text); font-weight: 700; }
tr.hl td { background: rgba(79, 140, 255, .14); }

/* Embed configurator page */
.embed-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .8rem; margin: 1rem 0 1.2rem; }
.embed-field label { display: block; font-weight: 600; margin-bottom: .35rem; font-size: .9rem; }
.embed-field input, .embed-field select { width: 100%; font-size: 1rem; padding: .7rem .9rem; border-radius: 10px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font-family: inherit; }
.embed-field input:focus, .embed-field select:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.embed-preview { margin: 0 0 1.2rem; }
.embed-preview iframe { width: 100%; border: 1px solid var(--border); border-radius: 12px; background: var(--bg); display: block; }

/* ---------- Light theme ---------- */
[data-theme="light"] {
  color-scheme: light;
  --bg: #f4f6fb;
  --card: #ffffff;
  --border: #dfe6f2;
  --text: #141d33;
  --muted: #4e5c82;
  --accent: #2b64f5;
  --accent-soft: rgba(43, 100, 245, .10);
  --ok: #0e7a3c;
  --err: #c22f2f;
}
[data-theme="light"] .site-header { background: rgba(255, 255, 255, .88); }
[data-theme="light"] .hero::before { opacity: .45; }
[data-theme="light"] .hero h1 {
  background: linear-gradient(180deg, #16295e 10%, #2b64f5);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
[data-theme="light"] .tok-c { color: #5b6b8c; }
[data-theme="light"] .tok-s { color: #b45309; }
[data-theme="light"] .tok-k { color: #6d28d9; }
[data-theme="light"] .tok-n { color: #c2410c; }
[data-theme="light"] .tool.card {
  background: linear-gradient(var(--card), var(--card)) padding-box, linear-gradient(135deg, rgba(43, 100, 245, .35), rgba(139, 92, 246, .22)) border-box;
  box-shadow: 0 10px 34px rgba(43, 80, 180, .10);
}
[data-theme="light"] .copied-ok { background: var(--ok) !important; border-color: var(--ok) !important; color: #fff !important; }
[data-theme="light"] tr.hl td { background: rgba(43, 100, 245, .12); }
tr[tabindex]:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }