/* ═══════════════════════════════════════════════════════════════════
   GasoilBaratoCerca — Sistema de diseño compartido para páginas estáticas
   ═══════════════════════════════════════════════════════════════════ */

/* ── Variables ─────────────────────────────────────────────────── */
:root {
  --green:      #16A34A;
  --green-dark: #15803D;
  --green-mid:  #22C55E;
  --green-bg:   #F0FDF4;
  --green-bdr:  #BBF7D0;
  --txt-dark:   #111827;
  --txt-mid:    #374151;
  --txt-light:  #6B7280;
  --txt-xlight: #9CA3AF;
  --border:     #E5E7EB;
  --border-mid: #F3F4F6;
  --bg:         #F9FAFB;
  --white:      #FFFFFF;
  --radius-sm:  10px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --shadow-sm:  0 1px 3px rgba(0,0,0,.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,.08);
}

/* ── Reset & base ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Plus Jakarta Sans", Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--txt-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body::before {
  content: '';
  display: block;
  height: 3px;
  background: linear-gradient(90deg, #16A34A 0%, #22C55E 50%, #86EFAC 100%);
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 99999;
}
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
img { display: block; max-width: 100%; height: auto; }
button { font-family: inherit; cursor: pointer; }

/* ── Layout ────────────────────────────────────────────────────── */
.gbc-wrap { max-width: 900px; margin: 0 auto; padding: 0 20px; }
.gbc-wrap-lg { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* ── Top bar ───────────────────────────────────────────────────── */
.gbc-topbar {
  background: var(--txt-dark);
  color: #9CA3AF;
  font-family: Inter, sans-serif;
  font-size: 12px;
  text-align: center;
  padding: 6px 20px;
  position: fixed;
  top: 3px; left: 0; right: 0;
  z-index: 9990;
  display: none; /* activar si se quiere usar */
}

/* ── Header ────────────────────────────────────────────────────── */
.gbc-header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 3px;
  z-index: 9990;
  box-shadow: var(--shadow-sm);
}
.gbc-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.gbc-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--txt-dark);
  letter-spacing: -.4px;
  flex-shrink: 0;
  margin-right: 4px;
}
.gbc-logo .logo-icon { font-size: 22px; line-height: 1; }
.gbc-logo .logo-accent { color: var(--green); }
.gbc-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}
.gbc-nav a {
  font-family: Inter, sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: var(--txt-light);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background 150ms, color 150ms;
}
.gbc-nav a:hover, .gbc-nav a.active {
  background: var(--green-bg);
  color: var(--green-dark);
  text-decoration: none;
}
.gbc-header-cta {
  flex-shrink: 0;
  background: var(--green);
  color: var(--white) !important;
  font-weight: 700;
  font-size: 13px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background 150ms;
  margin-left: auto;
}
.gbc-header-cta:hover { background: var(--green-dark); text-decoration: none; }

/* Mobile nav toggle */
.gbc-nav-toggle { display: none; }
.gbc-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  margin-left: auto;
  padding: 6px;
  border-radius: var(--radius-sm);
}
.gbc-hamburger span {
  display: block;
  height: 2px;
  background: var(--txt-dark);
  border-radius: 2px;
  transition: transform 200ms, opacity 200ms;
}
.gbc-nav-toggle:checked ~ .gbc-hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.gbc-nav-toggle:checked ~ .gbc-hamburger span:nth-child(2) { opacity: 0; }
.gbc-nav-toggle:checked ~ .gbc-hamburger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Breadcrumb ────────────────────────────────────────────────── */
.gbc-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-family: Inter, sans-serif;
  font-size: 13px;
  color: var(--txt-xlight);
  padding: 18px 0 0;
}
.gbc-breadcrumb a { color: var(--txt-light); }
.gbc-breadcrumb a:hover { color: var(--green); text-decoration: none; }
.gbc-breadcrumb .sep { color: var(--border); }
.gbc-breadcrumb .current { color: var(--txt-mid); }

/* ── Hero ──────────────────────────────────────────────────────── */
.gbc-hero { padding: 28px 0 20px; }
.gbc-hero h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.2;
  margin-bottom: 12px;
  color: var(--txt-dark);
}
.gbc-hero .lead {
  font-family: Inter, sans-serif;
  font-size: 16px;
  color: var(--txt-mid);
  line-height: 1.7;
  max-width: 680px;
}
.gbc-hero .lead strong { color: var(--txt-dark); }

/* ── Finder Widget ─────────────────────────────────────────────── */
.gbc-finder {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin: 20px 0;
  box-shadow: var(--shadow-md);
}
.gbc-finder-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--txt-mid);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.gbc-finder-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}
.gbc-finder select, .gbc-finder input[type="text"] {
  font-family: Inter, sans-serif;
  font-size: 14px;
  color: var(--txt-dark);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  flex: 1;
  min-width: 140px;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
  cursor: pointer;
  transition: border-color 150ms;
}
.gbc-finder select:focus, .gbc-finder input[type="text"]:focus {
  outline: none;
  border-color: var(--green);
}
.gbc-finder input[type="text"] {
  background-image: none;
  padding-right: 14px;
}
.gbc-finder-btn {
  background: var(--green);
  color: var(--white);
  border: none;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  transition: background 150ms, transform 150ms;
  flex-shrink: 0;
}
.gbc-finder-btn:hover { background: var(--green-dark); transform: translateY(-1px); }
.gbc-finder-note {
  font-family: Inter, sans-serif;
  font-size: 12px;
  color: var(--txt-xlight);
  margin-top: 10px;
}

/* ── CTA Box ───────────────────────────────────────────────────── */
.gbc-cta {
  background: linear-gradient(135deg, #22C55E 0%, #15803D 100%);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin: 24px 0;
}
.gbc-cta h2 { font-size: 18px; font-weight: 800; margin-bottom: 4px; }
.gbc-cta p { font-family: Inter, sans-serif; font-size: 13px; opacity: .88; }
.gbc-cta-btn {
  background: var(--white);
  color: var(--green-dark) !important;
  font-weight: 700;
  font-size: 14px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0,0,0,.12);
  transition: transform 200ms, box-shadow 200ms;
  flex-shrink: 0;
}
.gbc-cta-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,.16); text-decoration: none; }

/* ── Cards ─────────────────────────────────────────────────────── */
.gbc-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}
.gbc-card h2 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.4px;
  margin-bottom: 14px;
  color: var(--txt-dark);
}
.gbc-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--txt-dark);
  margin-bottom: 6px;
  margin-top: 18px;
}
.gbc-card h3:first-child { margin-top: 0; }
.gbc-card p {
  font-family: Inter, sans-serif;
  font-size: 15px;
  line-height: 1.75;
  color: var(--txt-mid);
  margin-bottom: 12px;
}
.gbc-card p:last-child { margin-bottom: 0; }
.gbc-card ul {
  font-family: Inter, sans-serif;
  font-size: 14px;
  line-height: 1.8;
  color: var(--txt-mid);
  padding-left: 20px;
  margin-bottom: 12px;
}

/* ── Stats strip ───────────────────────────────────────────────── */
.gbc-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin: 20px 0;
}
.gbc-stat {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  text-align: center;
}
.gbc-stat .num {
  font-size: 22px;
  font-weight: 800;
  color: var(--green);
  letter-spacing: -.5px;
  margin-bottom: 4px;
}
.gbc-stat .lbl {
  font-family: Inter, sans-serif;
  font-size: 12px;
  color: var(--txt-light);
  line-height: 1.4;
}

/* ── Accordion (details/summary) ────────────────────────────────── */
.gbc-accordion { margin-bottom: 20px; }
.gbc-accordion summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  color: var(--txt-dark);
  border-bottom: 1px solid var(--border-mid);
  user-select: none;
  gap: 12px;
}
.gbc-accordion summary::-webkit-details-marker { display: none; }
.gbc-accordion summary::after {
  content: '+';
  font-size: 22px;
  font-weight: 400;
  color: var(--green);
  flex-shrink: 0;
  line-height: 1;
}
.gbc-accordion[open] > summary::after { content: '−'; }
.gbc-accordion .acc-body {
  padding: 14px 0 18px;
  font-family: Inter, sans-serif;
  font-size: 14px;
  line-height: 1.75;
  color: var(--txt-mid);
  border-bottom: 1px solid var(--border-mid);
}
.gbc-accordion .acc-body p { margin-bottom: 8px; }
.gbc-accordion .acc-body p:last-child { margin-bottom: 0; }

/* FAQ wrapper */
.gbc-faq-list > details:last-child summary,
.gbc-faq-list > details:last-child .acc-body { border-bottom: none; }

/* ── CSS Tabs ──────────────────────────────────────────────────── */
.gbc-tabs { margin-bottom: 20px; }
.gbc-tabs .tab-radio { display: none; }
.tab-labels {
  display: flex;
  border-bottom: 2px solid var(--border);
  margin-bottom: 20px;
  gap: 2px;
  overflow-x: auto;
}
.tab-labels label {
  padding: 10px 18px;
  font-family: Inter, sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--txt-light);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  transition: color 150ms;
}
.tab-labels label:hover { color: var(--txt-dark); }
.tab-panels .panel { display: none; }

/* Dynamic tab activation — supports up to 4 tabs */
#t1:checked ~ .tab-labels label[for="t1"],
#t2:checked ~ .tab-labels label[for="t2"],
#t3:checked ~ .tab-labels label[for="t3"],
#t4:checked ~ .tab-labels label[for="t4"] { color: var(--green); border-bottom-color: var(--green); }
#t1:checked ~ .tab-panels #p1,
#t2:checked ~ .tab-panels #p2,
#t3:checked ~ .tab-panels #p3,
#t4:checked ~ .tab-panels #p4 { display: block; }

/* ── Tables ────────────────────────────────────────────────────── */
.gbc-table {
  width: 100%;
  border-collapse: collapse;
  font-family: Inter, sans-serif;
  font-size: 14px;
}
.gbc-table th {
  background: var(--bg);
  text-align: left;
  padding: 10px 14px;
  font-weight: 600;
  color: var(--txt-mid);
  border-bottom: 2px solid var(--border);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .4px;
}
.gbc-table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border-mid);
  color: var(--txt-mid);
  vertical-align: middle;
}
.gbc-table tr:last-child td { border-bottom: none; }
.gbc-table tr:hover td { background: var(--bg); }
.gbc-table .price { font-weight: 700; color: var(--green); }
.gbc-table .badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}
.badge-green { background: var(--green-bg); color: var(--green-dark); }
.badge-amber { background: #FFFBEB; color: #D97706; }
.badge-blue  { background: #EFF6FF; color: #1D4ED8; }

/* ── Info boxes ────────────────────────────────────────────────── */
.gbc-info {
  background: var(--green-bg);
  border: 1px solid var(--green-bdr);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 16px 0;
  font-family: Inter, sans-serif;
  font-size: 14px;
  color: #166534;
  line-height: 1.65;
}
.gbc-warn {
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 16px 0;
  font-family: Inter, sans-serif;
  font-size: 14px;
  color: #92400E;
  line-height: 1.65;
}

/* ── Grid: 2-col, 3-col, 4-col ─────────────────────────────────── */
.gbc-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.gbc-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.gbc-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }

/* ── Pill links ────────────────────────────────────────────────── */
.gbc-pills { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.gbc-pill {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 15px;
  font-family: Inter, sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--txt-mid);
  transition: all 150ms;
}
.gbc-pill:hover { background: var(--green-bg); border-color: var(--green-bdr); color: var(--green-dark); text-decoration: none; }

/* ── Low-cost chain cards ────────────────────────────────────────── */
.chain-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; margin: 16px 0; }
.chain-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  text-align: center;
}
.chain-card .chain-name { font-size: 14px; font-weight: 700; color: var(--txt-dark); margin-bottom: 4px; }
.chain-card .chain-save {
  font-family: Inter, sans-serif;
  font-size: 12px;
  color: var(--green-dark);
  font-weight: 600;
  background: var(--green-bg);
  border-radius: 6px;
  padding: 2px 8px;
  display: inline-block;
}

/* ── Step list ─────────────────────────────────────────────────── */
.gbc-steps { display: flex; flex-direction: column; gap: 16px; margin: 16px 0; }
.gbc-step { display: flex; gap: 14px; align-items: flex-start; }
.step-num {
  flex-shrink: 0;
  width: 34px; height: 34px;
  background: var(--green-bg);
  border: 2px solid var(--green-bdr);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 14px; color: var(--green-dark);
}
.step-body h3 { font-size: 14px; font-weight: 700; margin-bottom: 4px; color: var(--txt-dark); }
.step-body p { font-family: Inter, sans-serif; font-size: 13px; color: var(--txt-mid); line-height: 1.6; margin: 0; }

/* ── Numbered tricks ───────────────────────────────────────────── */
.gbc-trick {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-mid);
}
.gbc-trick:last-child { border-bottom: none; }
.trick-num {
  flex-shrink: 0;
  font-size: 28px;
  font-weight: 800;
  color: var(--green-bdr);
  line-height: 1;
  min-width: 36px;
}
.trick-body h3 { font-size: 16px; font-weight: 700; color: var(--txt-dark); margin-bottom: 6px; }
.trick-body p { font-family: Inter, sans-serif; font-size: 14px; color: var(--txt-mid); line-height: 1.7; margin: 0; }

/* ── Savings calculator ─────────────────────────────────────────── */
.gbc-calc {
  background: linear-gradient(135deg, #0F172A 0%, #1E3A2F 100%);
  border-radius: var(--radius-lg);
  padding: 28px;
  color: var(--white);
  margin: 20px 0;
}
.gbc-calc h2 { font-size: 18px; font-weight: 800; margin-bottom: 6px; }
.gbc-calc p { font-family: Inter, sans-serif; font-size: 14px; color: #94A3B8; margin-bottom: 20px; }
.calc-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 20px; }
.calc-field label { display: block; font-family: Inter, sans-serif; font-size: 12px; font-weight: 600; color: #94A3B8; margin-bottom: 6px; }
.calc-field input, .calc-field select {
  width: 100%;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-family: Inter, sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
  -webkit-appearance: none;
  appearance: none;
}
.calc-field input:focus, .calc-field select:focus { outline: none; border-color: var(--green-mid); }
.calc-result {
  background: rgba(22,163,74,.25);
  border: 1px solid rgba(22,163,74,.4);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: none;
}
.calc-result.visible { display: block; }
.calc-result .result-num { font-size: 32px; font-weight: 800; color: #4ADE80; }
.calc-result .result-lbl { font-family: Inter, sans-serif; font-size: 13px; color: #86EFAC; margin-top: 4px; }
.calc-btn {
  background: var(--green);
  color: var(--white);
  border: none;
  padding: 11px 24px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 14px;
  transition: background 150ms;
}
.calc-btn:hover { background: var(--green-dark); }

/* ── Zone cards ────────────────────────────────────────────────── */
.zone-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; margin: 16px 0; }
.zone-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
}
.zone-name { font-size: 15px; font-weight: 700; color: var(--txt-dark); margin-bottom: 6px; }
.zone-detail { font-family: Inter, sans-serif; font-size: 13px; color: var(--txt-light); line-height: 1.55; }

/* ── Footer ────────────────────────────────────────────────────── */
.gbc-footer {
  background: var(--white);
  border-top: 1px solid var(--border);
  margin-top: 56px;
  padding: 32px 20px 24px;
}
.gbc-footer-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 32px;
  margin-bottom: 24px;
}
.footer-brand .f-logo { font-size: 16px; font-weight: 800; color: var(--txt-dark); margin-bottom: 6px; }
.footer-brand .f-logo span { color: var(--green); }
.footer-brand p { font-family: Inter, sans-serif; font-size: 12px; color: var(--txt-xlight); line-height: 1.6; }
.footer-links-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.footer-col h4 { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--txt-light); margin-bottom: 10px; }
.footer-col a { display: block; font-family: Inter, sans-serif; font-size: 13px; color: var(--txt-xlight); margin-bottom: 6px; }
.footer-col a:hover { color: var(--green); text-decoration: none; }
.footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid var(--border-mid);
  padding-top: 16px;
  font-family: Inter, sans-serif;
  font-size: 12px;
  color: var(--txt-xlight);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom a { color: var(--txt-xlight); margin-left: 12px; }
.footer-bottom a:hover { color: var(--green); text-decoration: none; }

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .gbc-hamburger { display: flex; }
  .gbc-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px 20px 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,.08);
    gap: 2px;
  }
  .gbc-nav a { font-size: 15px; padding: 10px 14px; }
  .gbc-nav-toggle:checked ~ .gbc-nav { display: flex; }
  .gbc-header { position: relative; }
  .gbc-header-cta { display: none; }

  .gbc-hero h1 { font-size: 24px; }
  .gbc-grid-2 { grid-template-columns: 1fr; }
  .gbc-grid-3 { grid-template-columns: 1fr 1fr; }
  .gbc-grid-4 { grid-template-columns: 1fr 1fr; }
  .gbc-cta { flex-direction: column; }
  .gbc-card { padding: 18px 16px; }
  .gbc-finder-row { flex-direction: column; }
  .gbc-finder select, .gbc-finder input[type="text"] { min-width: 100%; }
  .gbc-finder-btn { width: 100%; text-align: center; padding: 12px; }
  .gbc-footer-grid { grid-template-columns: 1fr; gap: 20px; }
  .footer-links-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-bottom a { margin-left: 0; margin: 0 6px; }
  .gbc-table { font-size: 13px; }
  .gbc-table th, .gbc-table td { padding: 8px 10px; }
  .calc-row { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .gbc-grid-3 { grid-template-columns: 1fr; }
  .gbc-grid-4 { grid-template-columns: 1fr 1fr; }
  .footer-links-grid { grid-template-columns: 1fr; }
  .calc-row { grid-template-columns: 1fr; }
  .chain-grid { grid-template-columns: repeat(2, 1fr); }
}