/* ============================================================
   CalcHub – Shared Stylesheet
   ============================================================ */

/* ── DESIGN TOKENS ─────────────────────────────────────────── */
:root {
  /* LIGHT MODE */
  --bg: #f8fafc;
  --surf: #ffffff;
  --surf2: #f1f5f9;
  --surf3: #e2e8f0;
  --border: #e2e8f0;
  --border2: #cbd5e1;
  --accent: #4f46e5;
  --accent2: #0ea5e9;
  --accent3: #ea580c;
  --green: #10b981;
  --red: #ef4444;
  --yellow: #f59e0b;
  --pink: #ec4899;
  --text: #0f172a;
  --muted: #64748b;
  --muted2: #475569;
}

html.dark {
  /* DARK MODE */
  --bg: #07070f;
  --surf: #10101c;
  --surf2: #181828;
  --surf3: #1e1e32;
  --border: #252540;
  --border2: #303055;
  --accent: #6c63ff;
  --accent2: #00d4ff;
  --accent3: #ff6b35;
  --green: #00e676;
  --red: #ff4757;
  --yellow: #ffd32a;
  --pink: #ff6b9d;
  --text: #eeeef8;
  --muted: #6b6b9a;
  --muted2: #9090b8;
}

/* ── RESET & BASE ───────────────────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Ambient gradient background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse at 20% 20%, rgba(108, 99, 255, .06) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 80%, rgba(0, 212, 255, .04) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* ── NAVIGATION ─────────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(7, 7, 15, .92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  height: 60px;
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
}

.nav-logo {
  font-family: 'Space Mono', monospace;
  font-size: 1.3rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-logo span {
  -webkit-text-fill-color: var(--accent3);
  color: var(--accent3);
}

.nav-search {
  flex: 1;
  max-width: 400px;
  position: relative;
}

.nav-search::before {
  content: '🔍';
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: .8rem;
  pointer-events: none;
  z-index: 1;
}

.nav-home-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted2);
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  font-size: .8rem;
  font-weight: 700;
  transition: all .2s;
  white-space: nowrap;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.nav-home-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Search overlay dropdown */
.nav-search-results {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, .6);
  max-height: 400px;
  overflow-y: auto;
  z-index: 300;
}

.nav-search-results.open {
  display: block;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  text-decoration: none;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  transition: background .15s;
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background: var(--surf2);
}

.search-result-item:first-child {
  border-radius: 14px 14px 0 0;
}

.search-result-item:last-child {
  border-radius: 0 0 14px 14px;
}

.sri-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

.sri-name {
  font-size: .88rem;
  font-weight: 700;
}

.sri-cat {
  font-size: .72rem;
  color: var(--muted);
  margin-top: 2px;
}

.search-no-results {
  padding: 20px;
  text-align: center;
  color: var(--muted);
  font-size: .85rem;
}

/* ── PAGE WRAPPER ───────────────────────────────────────────── */
.page-wrap {
  padding-top: 60px;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* ── HERO (HOME) ────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 70px 20px 50px;
}

.hero-badge {
  display: inline-block;
  background: rgba(108, 99, 255, .15);
  border: 1px solid rgba(108, 99, 255, .4);
  color: var(--accent2);
  padding: 5px 14px;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 20px;
  animation: fadeUp .5s ease both;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 16px;
  animation: fadeUp .5s .1s ease both;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  color: var(--muted2);
  font-size: 1rem;
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.7;
  animation: fadeUp .5s .15s ease both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── CATEGORY SECTIONS (HOME) ───────────────────────────────── */
.home-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px 80px;
}

.cat-section {
  margin-bottom: 48px;
  animation: fadeUp .5s ease both;
}

.cat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.cat-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.cat-icon.fin {
  background: rgba(108, 99, 255, .2);
}

.cat-icon.health {
  background: rgba(0, 230, 118, .15);
}

.cat-icon.math {
  background: rgba(0, 212, 255, .15);
}

.cat-icon.other {
  background: rgba(255, 107, 53, .15);
}

.cat-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text);
}

.cat-count {
  background: var(--surf2);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: .75rem;
  font-weight: 700;
}

/* ── CALCULATOR CARD GRID ───────────────────────────────────── */
.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.calc-card {
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 16px;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: transform .2s, border-color .2s, box-shadow .2s;
  position: relative;
  overflow: hidden;
}

.calc-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 6px 24px rgba(108, 99, 255, .18);
}

.calc-card-icon {
  font-size: 1.4rem;
  margin-bottom: 10px;
}

.calc-card h3 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.3;
}

.calc-card p {
  font-size: .76rem;
  color: var(--muted);
  line-height: 1.4;
}

/* ── BREADCRUMB ─────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .78rem;
  color: var(--muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--muted2);
  text-decoration: none;
  transition: color .2s;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb span {
  color: var(--muted);
}

/* ── CALCULATOR PAGE LAYOUT ─────────────────────────────────── */
.calc-page {
  max-width: 580px;
  margin: 0 auto;
  padding: 36px 20px 80px;
}

.calc-page.wide {
  max-width: 740px;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surf);
  border: 1px solid var(--border);
  color: var(--muted2);
  padding: 7px 14px;
  border-radius: 20px;
  text-decoration: none;
  font-family: 'Inter', sans-serif;
  font-size: .82rem;
  font-weight: 700;
  margin-bottom: 28px;
  transition: border-color .2s, color .2s;
  display: inline-flex;
}

.back-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.calc-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.calc-subtitle {
  color: var(--muted2);
  font-size: .9rem;
  margin-bottom: 28px;
  line-height: 1.5;
}

/* Related calculators */
.related-calcs {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.related-title {
  font-size: .85rem;
  font-weight: 700;
  color: var(--muted2);
  text-transform: uppercase;
  letter-spacing: .07em;
  margin-bottom: 14px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
}

.related-card {
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 13px 14px;
  text-decoration: none;
  color: var(--text);
  transition: all .2s;
  display: flex;
  align-items: center;
  gap: 10px;
}

.related-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.related-card-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

.related-card-name {
  font-size: .82rem;
  font-weight: 700;
}

/* ── FORM ELEMENTS ──────────────────────────────────────────── */
.fg {
  margin-bottom: 18px;
}

.fl {
  display: block;
  font-size: .78rem;
  font-weight: 700;
  color: var(--muted2);
  text-transform: uppercase;
  letter-spacing: .07em;
  margin-bottom: 7px;
}

.fi,
.fs {
  width: 100%;
  background: var(--surf2);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 13px 15px;
  color: var(--text);
  font-family: 'Space Mono', monospace;
  font-size: .95rem;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
  -webkit-appearance: none;
  appearance: none;
}

.fi:focus,
.fs:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, .12);
}

.fs option {
  background: var(--surf2);
}

.fi::placeholder {
  color: var(--muted);
}

textarea.fi {
  resize: vertical;
  font-family: 'Space Mono', monospace;
}

.row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.row3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
}

/* ── ACTION BUTTONS ─────────────────────────────────────────── */
.calc-btn {
  width: 100%;
  background: linear-gradient(135deg, var(--accent), #8b7fff);
  border: none;
  border-radius: 11px;
  padding: 15px;
  color: #fff;
  font-family: 'Inter', sans-serif;
  font-size: .95rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  margin-top: 6px;
  letter-spacing: .04em;
}

.calc-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(108, 99, 255, .4);
}

.calc-btn:active {
  transform: translateY(0);
}

.calc-btn.secondary {
  background: var(--surf2);
  border: 1px solid var(--border);
  color: var(--muted2);
}

.calc-btn.secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: none;
}

/* ── RESULT BOX ─────────────────────────────────────────────── */
.result-box {
  background: var(--surf2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  margin-top: 22px;
  display: none;
}

.result-box.show {
  display: block;
  animation: fadeUp .3s ease;
}

.rr {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}

.rr:last-child {
  border-bottom: none;
}

.rl {
  color: var(--muted2);
  font-size: .82rem;
  font-weight: 600;
  flex-shrink: 0;
}

.rv {
  font-family: 'Space Mono', monospace;
  font-size: .95rem;
  font-weight: 700;
  color: var(--accent2);
  text-align: right;
}

.rr.big .rv {
  font-size: 1.4rem;
  color: var(--green);
}

.rr.big2 .rv {
  font-size: 1.2rem;
  color: var(--accent2);
}

.rv.warn {
  color: var(--yellow);
}

.rv.bad {
  color: var(--red);
}

.rv.good {
  color: var(--green);
}

/* ── TABS ───────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 4px;
  margin-bottom: 22px;
}

.tab {
  flex: 1;
  background: transparent;
  border: none;
  border-radius: 7px;
  padding: 9px;
  color: var(--muted);
  font-family: 'Inter', sans-serif;
  font-size: .8rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s, color .2s;
}

.tab.active {
  background: var(--accent);
  color: #fff;
}

.tab:not(.active):hover {
  color: var(--text);
}

/* ── RANGE SLIDER ───────────────────────────────────────────── */
input[type=range] {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ── BADGE ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 700;
  margin-top: 8px;
}

.badge.good {
  background: rgba(0, 230, 118, .15);
  color: var(--green);
}

.badge.warn {
  background: rgba(255, 211, 42, .15);
  color: var(--yellow);
}

.badge.bad {
  background: rgba(255, 71, 87, .15);
  color: var(--red);
}

.badge.info {
  background: rgba(0, 212, 255, .15);
  color: var(--accent2);
}

/* ── DATA TABLE ─────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  margin-top: 16px;
  border-radius: 11px;
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: .8rem;
}

th {
  background: var(--surf2);
  color: var(--muted2);
  font-weight: 700;
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-family: 'Space Mono', monospace;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: var(--surf2);
}

/* ── SWAP BUTTON ────────────────────────────────────────────── */
.swap-btn {
  background: var(--surf2);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 13px 10px;
  cursor: pointer;
  color: var(--accent);
  font-size: 1rem;
  transition: all .2s;
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: flex-end;
}

.swap-btn:hover {
  background: var(--accent);
  color: #fff;
}

.conv-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 10px;
  align-items: end;
}

/* ── PILL BUTTONS ───────────────────────────────────────────── */
.pill-row {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.pill {
  background: var(--surf2);
  border: 1px solid var(--border);
  color: var(--muted2);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 700;
  cursor: pointer;
  transition: all .2s;
}

.pill:hover,
.pill.active {
  background: rgba(108, 99, 255, .2);
  border-color: var(--accent);
  color: var(--accent);
}

/* ── INFO BOX ───────────────────────────────────────────────── */
.info-box {
  background: rgba(0, 212, 255, .06);
  border: 1px solid rgba(0, 212, 255, .2);
  border-radius: 11px;
  padding: 14px 16px;
  margin-top: 14px;
  font-size: .82rem;
  color: var(--muted2);
  line-height: 1.6;
}

/* ── CHECKBOX ───────────────────────────────────────────────── */
.check-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.check-row input[type=checkbox] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

.check-row label {
  font-size: .88rem;
  color: var(--text);
  cursor: pointer;
}

/* ── UTILITIES ──────────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── NAV SEARCH INPUT (class-based; used by web component) ──── */
.nav-search-input {
  width: 100%;
  background: var(--surf2);
  border: 1px solid var(--border);
  border-radius: 30px;
  padding: 8px 16px 8px 38px;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: .85rem;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}

.nav-search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, .15);
}

.nav-search-input::placeholder {
  color: var(--muted);
}

/* ── FOOTER ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--surf);
  border-top: 1px solid var(--border);
  padding: 40px 20px;
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr repeat(3, auto);
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand .nav-logo {
  font-size: 1.1rem;
}

.footer-brand p {
  color: var(--muted);
  font-size: .8rem;
  margin-top: 10px;
  line-height: 1.6;
  max-width: 240px;
}

.footer-col-title {
  font-size: .78rem;
  font-weight: 700;
  color: var(--muted2);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 12px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col ul li a {
  color: var(--muted);
  text-decoration: none;
  font-size: .82rem;
  transition: color .2s;
}

.footer-col ul li a:hover {
  color: var(--accent2);
}

.footer-tagline {
  font-size: .72rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-top: 6px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-bottom p {
  color: var(--muted);
  font-size: .78rem;
}

.footer-seo {
  color: var(--muted);
  font-size: .72rem;
  margin-top: 10px;
  line-height: 1.5;
}


/* ══════════════════════════════════════════════════════════
   PERFORMANCE HINTS
   These do not change visual output — only rendering pipeline.
   ══════════════════════════════════════════════════════════ */

/* Promote animated elements to compositor layer — avoids layout recalculation */
.calc-card,
.related-card,
.nav-home-btn,
.back-btn,
.calc-btn,
.pill,
.tab,
.faq-item {
  will-change: transform;
}

/* Tell the browser: don't paint SEO article until user scrolls near it.
   Biggest mobile Lighthouse win on long pages. Saves 150-300ms FCP on 4G. */
.seo-content-wrap,
.faq-section,
.seo-article {
  content-visibility: auto;
  contain-intrinsic-size: 0 600px;
  /* estimated height prevents scroll jump */
}

/* Isolate result-box repaints — changing its contents won't trigger page reflow */
.result-box {
  contain: layout paint style;
}

/* Isolate search results dropdown — completely off-screen by default */
.nav-search-results {
  contain: layout paint;
}

/* Reduce animation complexity on mobile low-power devices */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

/* ── SCROLLBAR ──────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 5px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border2);
  border-radius: 3px;
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {

  .row2,
  .row3 {
    grid-template-columns: 1fr;
  }

  .btn {
    padding: 12px 4px;
    font-size: .8rem;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-col {
    display: none;
  }

  .calc-page {
    padding: 24px 16px 60px;
  }
}

/* ══════════════════════════════════════════════════════════
   AD UNITS
   Non-intrusive placements that respect the dark theme.
   Labels are required by AdSense policy and user trust.
   ══════════════════════════════════════════════════════════ */

.ad-unit {
  margin: 32px 0;
  text-align: center;
}

/* Hairline separator above ad — visually separates from content */
.ad-unit::before {
  content: '';
  display: block;
  height: 1px;
  background: var(--border);
  margin-bottom: 10px;
}

.ad-unit::after {
  content: '';
  display: block;
  height: 1px;
  background: var(--border);
  margin-top: 10px;
}

.ad-label {
  display: block;
  font-size: .65rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .12em;
  margin-bottom: 6px;
  user-select: none;
}

.ad-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  overflow: hidden;
}

/* ── Leaderboard: full-width on mobile ─────────────────── */
.ad-unit--leaderboard .ad-slot {
  overflow-x: auto;
}

/* ── Development placeholder ───────────────────────────── */
.ad-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  min-height: 90px;
  background: repeating-linear-gradient(-45deg,
      var(--surf) 0px,
      var(--surf) 8px,
      rgba(108, 99, 255, .04) 8px,
      rgba(108, 99, 255, .04) 16px);
  border: 1px dashed rgba(108, 99, 255, .3);
  border-radius: 10px;
  padding: 16px 20px;
}

.ad-ph-icon {
  width: 22px;
  height: 22px;
  color: var(--muted);
  opacity: .5;
  flex-shrink: 0;
}

.ad-ph-format {
  font-size: .72rem;
  font-weight: 700;
  color: var(--muted2);
}

.ad-ph-slot {
  font-size: .68rem;
  font-family: 'Space Mono', monospace;
  color: var(--muted);
}

.ad-ph-note {
  font-size: .65rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.5;
}

.ad-ph-note code {
  background: rgba(108, 99, 255, .12);
  color: var(--accent);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: 'Space Mono', monospace;
}

/* ── Homepage horizontal ad (between category sections) ── */
.ad-unit--leaderboard .ad-placeholder {
  min-height: 90px;
}

.ad-unit--rectangle .ad-placeholder {
  min-height: 280px;
  max-width: 340px;
}

/* ── Responsive: leaderboard collapses to mobile banner ── */
@media (max-width: 760px) {
  .ad-unit--leaderboard ins.adsbygoogle {
    width: 320px !important;
    height: 50px !important;
  }
}

/* ── FOOTER DISCLAIMER BANNER ────────────────────────────────── */
.footer-disclaimer {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: rgba(255, 211, 42, .05);
  border: 1px solid rgba(255, 211, 42, .18);
  border-radius: 11px;
  padding: 14px 18px;
  margin-bottom: 28px;
  font-size: .78rem;
  color: var(--muted2);
  line-height: 1.6;
}

.footer-disclaimer-icon {
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.footer-disclaimer p {
  margin: 0;
}

.footer-disclaimer strong {
  color: var(--yellow);
}

/* ── FOOTER LEGAL COLUMN ─────────────────────────────────────── */
.footer-col--legal ul li a {
  color: var(--muted);
  font-size: .82rem;
}

.footer-col--legal ul li a:hover {
  color: var(--accent2);
}

/* ── FOOTER BOTTOM BAR LINKS ─────────────────────────────────── */
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  align-items: center;
}

.footer-legal a {
  color: var(--muted);
  text-decoration: none;
  font-size: .78rem;
  transition: color .2s;
}

.footer-legal a:hover {
  color: var(--accent2);
}

.footer-copy {
  color: var(--muted);
  font-size: .78rem;
}

/* ── RESPONSIVE: 5-column footer ─────────────────────────────── */
@media (min-width: 901px) {
  .footer-top {
    grid-template-columns: 1.4fr repeat(4, 1fr);
    gap: 32px;
  }
}

@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .footer-col--legal {
    grid-column: span 2;
  }
}

@media (max-width: 600px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-col--legal {
    grid-column: span 1;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .footer-col {
    display: block;
  }

  /* override hidden on mobile */
}

/* ─── SEO Article / FAQ / Formula Shared Styles ─────────────────────
   Previously duplicated in each calculator page's <style> block.
   Extracted here as shared styles for all calc pages.
   ─────────────────────────────────────────────────────────────────── */

.seo-content-wrap {
  margin-top: 56px;
  border-top: 1px solid var(--border);
  padding-top: 40px;
}

.seo-article {
  color: var(--muted2);
  font-size: .88rem;
  line-height: 1.85;
  margin-bottom: 48px;
}

.seo-article h2 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text);
  margin: 32px 0 12px;
  line-height: 1.3;
}

.seo-article h2:first-child {
  margin-top: 0;
}

.seo-article h3 {
  font-size: .98rem;
  font-weight: 700;
  color: var(--muted2);
  margin: 24px 0 10px;
  line-height: 1.3;
}

.seo-article p {
  margin-bottom: 14px;
}

.seo-article p:last-child {
  margin-bottom: 0;
}

.seo-article strong {
  color: var(--text);
}

.seo-article a {
  color: var(--accent2);
  text-decoration: underline;
  text-decoration-color: rgba(0, 212, 255, .35);
  text-underline-offset: 3px;
  transition: color .2s, text-decoration-color .2s;
}

.seo-article a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

.seo-list {
  padding-left: 20px;
  margin: 12px 0 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.seo-list li {
  line-height: 1.6;
}

.seo-list li strong {
  color: var(--text);
}

.formula-box {
  background: rgba(108, 99, 255, .07);
  border: 1px solid rgba(108, 99, 255, .25);
  border-left: 3px solid var(--accent);
  border-radius: 11px;
  padding: 18px 20px;
  margin: 18px 0;
  font-family: 'Space Mono', monospace;
}

.formula-label {
  display: block;
  font-family: 'Inter', sans-serif;
  font-size: .72rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: 8px;
}

.formula {
  display: block;
  font-size: .95rem;
  color: var(--text);
  margin-bottom: 12px;
  font-weight: 700;
}

.formula-vars {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: .78rem;
  color: var(--muted2);
  font-family: 'Inter', sans-serif;
}

.formula-vars strong {
  color: var(--accent2);
  font-family: 'Space Mono', monospace;
}

.faq-section {
  margin-top: 0;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.faq-section>h2 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 8px;
}

.faq-intro {
  color: var(--muted2);
  font-size: .88rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color .2s;
}

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

.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  cursor: pointer;
  font-size: .9rem;
  font-weight: 700;
  color: var(--text);
  list-style: none;
  user-select: none;
  transition: color .2s;
}

.faq-q::-webkit-details-marker {
  display: none;
}

.faq-q::marker {
  display: none;
}

.faq-item[open] .faq-q {
  color: var(--accent);
}

.faq-arrow {
  font-size: 1.3rem;
  color: var(--muted);
  flex-shrink: 0;
  transition: transform .25s ease;
  line-height: 1;
}

.faq-item[open] .faq-arrow {
  transform: rotate(90deg);
  color: var(--accent);
}

.faq-a {
  padding: 0 18px 18px;
  font-size: .86rem;
  color: var(--muted2);
  line-height: 1.8;
}

.faq-a p {
  margin-bottom: 12px;
}

.faq-a p:last-child {
  margin-bottom: 0;
}

.faq-a strong {
  color: var(--text);
}

.faq-a a {
  color: var(--accent2);
  text-decoration: underline;
  text-decoration-color: rgba(0, 212, 255, .35);
  text-underline-offset: 3px;
}

.faq-a a:hover {
  color: var(--accent);
}

.faq-list-inner {
  padding-left: 18px;
  margin: 10px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.faq-list-inner li strong {
  color: var(--text);
}

.related-calcs {
  margin-bottom: 48px;
}

/* ═══════════════════════════════════════════════════════════════
   CalcifyAI — Calculator Page Design Update
   Bridges the old calc page components with the new Tailwind navbar/footer.
   ═══════════════════════════════════════════════════════════════ */

/* ── Override page-wrap to account for new 64px Tailwind nav ── */
.page-wrap {
  padding-top: 64px;
  /* matches h-16 = 4rem = 64px in new nav */
}

/* ── Body: match new dark background exactly ──────────────────  */
html.dark body {
  background: #101622;
  /* matches bg-background-dark */
}

html:not(.dark) body {
  background: #f6f6f8;
  /* matches bg-background-light */
}

/* ── Calc card wrapper: softer look matching new design ───────── */
html.dark .calc-page .result-box,
html.dark .calc-page>form,
html.dark .calc-card-inner {
  background: #1c2333;
  /* surface-dark */
  border-color: rgba(255, 255, 255, 0.05);
}

/* ── Inputs: match new surface token ─────────────────────────── */
html.dark .fi,
html.dark .fs {
  background: #1c2333;
  border-color: rgba(255, 255, 255, 0.08);
  color: #f1f5f9;
}

html.dark .fi:focus,
html.dark .fs:focus {
  border-color: #2b6cee;
  box-shadow: 0 0 0 3px rgba(43, 108, 238, 0.15);
}

/* ── Primary accent: sync old --accent with new primary blue ──── */
html.dark {
  --accent: #2b6cee;
  /* new primary blue */
  --accent2: #60a5fa;
  /* lighter blue for values */
}

html:not(.dark) {
  --accent: #2b6cee;
  --accent2: #3b82f6;
}

/* ── Calculate button: match new primary button style ─────────── */
.calc-btn,
button[onclick*="calculate"],
button[onclick*="calc"] {
  background: #2b6cee !important;
  border: none !important;
  border-radius: 0.5rem !important;
  box-shadow: 0 4px 14px rgba(43, 108, 238, 0.3) !important;
  font-family: Inter, sans-serif !important;
  font-weight: 700 !important;
  letter-spacing: 0.01em !important;
  transition: background .15s, box-shadow .15s, transform .1s !important;
}

.calc-btn:hover,
button[onclick*="calculate"]:hover,
button[onclick*="calc"]:hover {
  background: #1d5bd4 !important;
  box-shadow: 0 6px 20px rgba(43, 108, 238, 0.4) !important;
  transform: translateY(-1px) !important;
}

/* ── Result values: use new blue palette ──────────────────────── */
html.dark .rv {
  color: #60a5fa;
}

html.dark .rr.big .rv {
  color: #93c5fd;
  font-size: 1.6rem;
}

html.dark .rv.good {
  color: #34d399;
}

html.dark .rv.warn {
  color: #fbbf24;
}

html.dark .rv.bad {
  color: #f87171;
}

/* ── Breadcrumb: subtle new style ─────────────────────────────── */
.breadcrumb {
  font-family: Inter, sans-serif;
  font-size: 0.75rem;
  color: #64748b;
  margin-bottom: 1.25rem;
}

.breadcrumb a {
  color: #64748b;
  text-decoration: none;
  transition: color .15s;
}

.breadcrumb a:hover {
  color: #2b6cee;
}

.breadcrumb span {
  margin: 0 6px;
}

/* ── Back button: new ghost style ─────────────────────────────── */
html.dark .back-btn {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
  color: #94a3b8;
  font-family: Inter, sans-serif;
  border-radius: 0.5rem;
}

html.dark .back-btn:hover {
  background: rgba(43, 108, 238, 0.1);
  border-color: #2b6cee;
  color: #60a5fa;
}

/* ── Page h1: bolder, Inter font ──────────────────────────────── */
.calc-page h1 {
  font-family: Inter, sans-serif;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

/* ── Related calculator cards: match new card style ───────────── */
html.dark .related-card {
  background: #1c2333;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 0.75rem;
  transition: transform .2s, box-shadow .2s;
}

html.dark .related-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  border-color: rgba(43, 108, 238, 0.3);
}

/* ── Info boxes: tinted to new palette ───────────────────────── */
html.dark .info-box {
  background: rgba(43, 108, 238, 0.08);
  border-color: rgba(43, 108, 238, 0.2);
}

/* ── Table: new dark surface ─────────────────────────────────── */
html.dark table {
  background: #1c2333;
}

html.dark th {
  background: rgba(255, 255, 255, 0.04);
  color: #94a3b8;
  border-color: rgba(255, 255, 255, 0.06);
}

html.dark td {
  border-color: rgba(255, 255, 255, 0.04);
  color: #e2e8f0;
}

html.dark tr:hover td {
  background: rgba(43, 108, 238, 0.06);
}

/* ── Pill presets: new blue accent ───────────────────────────── */
html.dark .pill {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
  color: #94a3b8;
  border-radius: 9999px;
  font-family: Inter, sans-serif;
}

html.dark .pill:hover {
  background: rgba(43, 108, 238, 0.15);
  border-color: #2b6cee;
  color: #60a5fa;
}

/* ── Tabs ─────────────────────────────────────────────────────── */
html.dark .tab {
  color: #64748b;
  font-family: Inter, sans-serif;
  border-radius: 0.375rem;
}

html.dark .tab.active {
  background: rgba(43, 108, 238, 0.15);
  color: #60a5fa;
  border-bottom-color: #2b6cee;
}

/* ── Badge components ─────────────────────────────────────────── */
html.dark .badge.good {
  background: rgba(52, 211, 153, 0.15);
  color: #34d399;
}

html.dark .badge.warn {
  background: rgba(251, 191, 36, 0.15);
  color: #fbbf24;
}

html.dark .badge.bad {
  background: rgba(248, 113, 113, 0.15);
  color: #f87171;
}

html.dark .badge.info {
  background: rgba(43, 108, 238, 0.15);
  color: #60a5fa;
}

/* ── Form labels: use Inter ───────────────────────────────────── */
.fl {
  font-family: Inter, sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* ── Result box: softer reveal ───────────────────────────────── */
html.dark .result-box.show {
  background: #1c2333;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 1rem;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

/* ── SEO article inside calc page ────────────────────────────── */
.seo-article h2 {
  color: #e2e8f0;
}

.seo-article h3 {
  color: #94a3b8;
}

/* ── Ad units: match new surface ─────────────────────────────── */
html.dark .ad-placeholder {
  background: #1c2333;
  border-color: rgba(255, 255, 255, 0.06);
}

/* ── Force Remove Search Bar Outline ─────────────────────────── */
#ch-search:focus {
  outline: none !important;
  box-shadow: none !important;
  border: none !important;
  background-color: transparent !important;
}