:root {
  --bg: #f4f7f8;
  --bg-2: #ecf4f5;
  --surface: #ffffff;
  --surface-soft: #f8fbfb;
  --text: #0d1b23;
  --text-strong: #081218;
  --muted: #546b75;
  --muted-soft: #7b8f98;
  --border: #d6e5e6;
  --border-soft: #e6eef0;
  --teal: #0f766e;
  --teal-dark: #0b5d57;
  --teal-darker: #064a45;
  --sky: #0ea5e9;
  --sky-dark: #0883ba;
  --sky-soft: rgba(14, 165, 233, 0.08);
  --teal-soft: rgba(15, 118, 110, 0.08);
  --amber: #d97706;
  --red: #dc2626;
  --green: #059669;
  --shadow: 0 18px 50px rgba(8, 18, 24, 0.1);
  --shadow-soft: 0 10px 32px rgba(8, 18, 24, 0.06);
  --shadow-hover: 0 22px 60px rgba(8, 18, 24, 0.13);
  --radius: 22px;
  --radius-sm: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(180deg, #f8fbfc 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--teal-dark);
  text-decoration: none;
}

a:hover {
  color: var(--teal-darker);
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

section {
  padding: 92px 0;
}

/* ─────────────────────────── Header ─────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  background: rgba(248, 251, 252, 0.86);
  border-bottom: 1px solid rgba(214, 229, 230, 0.8);
}

.nav {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--teal), var(--sky));
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  letter-spacing: -0.04em;
  box-shadow: 0 6px 18px rgba(15, 118, 110, 0.22);
}

.brand {
  font-size: 1.04rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-strong);
}

.brand-sub {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.2;
}

.nav-links {
  display: flex;
  gap: 28px;
  margin: 0 auto 0 32px;
}

.nav-links a {
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: color 150ms ease;
}

.nav-links a:hover {
  color: var(--teal-dark);
}

/* ─────────────────────────── Buttons ─────────────────────────── */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 24px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.97rem;
  border: 1px solid transparent;
  letter-spacing: -0.005em;
  transition: transform 150ms ease, background 150ms ease, border-color 150ms ease, color 150ms ease, box-shadow 150ms ease;
  cursor: pointer;
  font-family: inherit;
}

.button:hover {
  transform: translateY(-1px);
}

.button.small {
  padding: 11px 18px;
  font-size: 0.92rem;
}

.button.large {
  padding: 18px 32px;
  font-size: 1.02rem;
}

.button.primary {
  background: linear-gradient(135deg, var(--teal), var(--sky));
  color: white;
  box-shadow: 0 12px 28px rgba(14, 128, 162, 0.24);
}

.button.primary:hover {
  background: linear-gradient(135deg, var(--teal-dark), var(--sky-dark));
  box-shadow: 0 14px 34px rgba(14, 128, 162, 0.3);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.86);
  color: var(--text-strong);
  border-color: var(--border);
}

.button.secondary:hover {
  border-color: rgba(15, 118, 110, 0.45);
  color: var(--teal-dark);
  background: white;
}

/* ─────────────────────────── Hero ─────────────────────────── */

.hero-section {
  padding: 64px 0 56px;
}

.hero-grid,
.split-section,
.offer-grid,
.steps-grid,
.principles-grid,
.faq-grid,
.problem-grid {
  display: grid;
  gap: 24px;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.1fr) minmax(420px, 0.9fr);
  align-items: center;
  gap: 56px;
}

.hero-copy {
  max-width: 640px;
}

.eyebrow,
.section-label,
.offer-type,
.note-label,
.footer-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.eyebrow {
  background: var(--teal-soft);
  border: 1px solid rgba(15, 118, 110, 0.22);
  color: var(--teal-darker);
  margin-bottom: 22px;
}

.eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.18);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

.section-label,
.offer-type,
.note-label {
  background: var(--sky-soft);
  border: 1px solid rgba(14, 165, 233, 0.18);
  color: #065a82;
}

h1,
h2,
h3 {
  margin: 0 0 16px;
  letter-spacing: -0.035em;
  line-height: 1.06;
  color: var(--text-strong);
  font-weight: 800;
}

h1 {
  font-size: clamp(2.7rem, 4.7vw, 4.6rem);
  letter-spacing: -0.04em;
  max-width: 16ch;
}

h2 {
  font-size: clamp(2rem, 3.1vw, 3.2rem);
  letter-spacing: -0.035em;
  max-width: 18ch;
}

h3 {
  font-size: 1.18rem;
  letter-spacing: -0.02em;
}

p {
  margin: 0 0 16px;
  color: var(--muted);
}

.lead {
  font-size: 1.15rem;
  color: #334650;
  max-width: 62ch;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.trust-cluster {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 36px;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--border-soft);
}

.trust-stat .trust-number {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: -0.025em;
  line-height: 1;
  margin-bottom: 4px;
  background: linear-gradient(135deg, var(--teal-dark), var(--sky-dark));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.trust-stat .trust-label {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 600;
}

.hero-visual {
  position: relative;
  min-height: 580px;
}

.image-frame {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.9);
  background: white;
}

.hero-image-card {
  height: 100%;
}

.hero-image-card img {
  height: 100%;
  min-height: 580px;
  object-fit: cover;
  object-position: center;
}

.visual-badge {
  position: absolute;
  top: 18px;
  left: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(8, 18, 24, 0.78);
  backdrop-filter: blur(10px);
  color: white;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: -0.005em;
}

.visual-badge svg {
  color: var(--sky);
}

.floating-note {
  position: absolute;
  left: -36px;
  bottom: 28px;
  width: 340px;
  padding: 22px;
}

.note-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 16px;
}

.note-pill {
  display: inline-flex;
  padding: 4px 10px;
  font-size: 0.68rem;
  font-weight: 700;
  background: rgba(5, 150, 105, 0.1);
  color: var(--green);
  border-radius: 999px;
  border: 1px solid rgba(5, 150, 105, 0.2);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.leak-rows {
  display: grid;
  gap: 10px;
  margin-bottom: 14px;
}

.leak-row {
  display: grid;
  grid-template-columns: 140px 1fr 56px;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
}

.leak-label {
  color: var(--muted);
  font-weight: 500;
}

.leak-bar {
  height: 6px;
  background: var(--border-soft);
  border-radius: 999px;
  overflow: hidden;
}

.leak-fill {
  height: 100%;
  border-radius: 999px;
}

.leak-fill.red { background: linear-gradient(90deg, #ef4444, var(--red)); }
.leak-fill.amber { background: linear-gradient(90deg, #f59e0b, var(--amber)); }
.leak-fill.green { background: linear-gradient(90deg, #10b981, var(--green)); }

.leak-value {
  font-weight: 700;
  font-size: 0.82rem;
  text-align: right;
}

.leak-value.bad { color: var(--red); }
.leak-value.warn { color: var(--amber); }
.leak-value.good { color: var(--green); }

.note-caption {
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted-soft);
  line-height: 1.45;
}

/* ─────────────────────────── Logo strip ─────────────────────────── */

.logo-strip-section {
  padding: 0 0 28px;
}

.logo-strip {
  padding: 32px 28px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--border-soft);
  border-radius: 20px;
  text-align: center;
}

.logo-strip-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.logo-strip-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 16px 42px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--muted-soft);
  letter-spacing: -0.01em;
}

/* ─────────────────────────── Math section ─────────────────────────── */

.split-section {
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  align-items: start;
  gap: 48px;
}

.math-table {
  margin-top: 28px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: white;
  box-shadow: var(--shadow-soft);
}

.math-row {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  align-items: center;
  padding: 16px 22px;
  border-bottom: 1px solid var(--border-soft);
  font-size: 0.98rem;
}

.math-row:last-child {
  border-bottom: 0;
}

.math-row.math-header {
  background: linear-gradient(180deg, rgba(15, 118, 110, 0.05), transparent);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.math-value {
  font-weight: 700;
  color: var(--green);
}

.math-cost {
  font-weight: 700;
  color: var(--text-strong);
}

.footnote {
  font-size: 0.85rem;
  color: var(--muted-soft);
  margin-top: 14px;
}

.stack {
  display: grid;
  gap: 20px;
}

.tall-image img {
  min-height: 360px;
  object-fit: cover;
}

.checklist-card {
  background: linear-gradient(180deg, rgba(15, 118, 110, 0.05), rgba(255, 255, 255, 0.96));
}

/* ─────────────────────────── Card primitives ─────────────────────────── */

.card {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-soft);
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}

.soft-card {
  background: var(--surface-soft);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--teal-soft), var(--sky-soft));
  color: var(--teal-dark);
  margin-bottom: 18px;
}

.mini-list,
.clean-list,
.check-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mini-list li,
.clean-list li,
.check-list li {
  padding: 11px 0;
  border-bottom: 1px solid var(--border-soft);
  color: var(--muted);
  font-size: 0.96rem;
}

.mini-list li:last-child,
.clean-list li:last-child,
.check-list li:last-child {
  border-bottom: 0;
}

.check-list li {
  padding-left: 28px;
  position: relative;
}

.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 15px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--teal-soft) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230b5d57' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center/12px no-repeat;
}

.clean-list.checks li {
  color: var(--text);
  padding-left: 28px;
  position: relative;
}

.clean-list.checks li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 15px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--teal) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center/12px no-repeat;
}

/* ─────────────────────────── Problem grid ─────────────────────────── */

.section-lead {
  max-width: 62ch;
  margin: 16px auto 0;
  font-size: 1.08rem;
  color: var(--muted);
}

.centered .section-lead {
  text-align: center;
}

.problem-grid.three-up,
.offer-grid.three-up,
.steps-grid.four-up,
.principles-grid.three-up {
  margin-top: 40px;
}

.problem-grid.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.problem-grid.three-up .card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(15, 118, 110, 0.25);
}

/* ─────────────────────────── Sections ─────────────────────────── */

.light-section {
  background: linear-gradient(180deg, rgba(236, 244, 245, 0.6), rgba(244, 247, 248, 0.25));
}

.section-heading {
  margin-bottom: 32px;
}

.centered {
  text-align: center;
}

.centered h2,
.centered .section-label {
  margin-left: auto;
  margin-right: auto;
}

/* ─────────────────────────── Steps ─────────────────────────── */

.steps-grid.four-up {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.step-card {
  position: relative;
  display: flex;
  flex-direction: column;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--teal-soft), var(--sky-soft));
  color: var(--teal-darker);
  font-weight: 800;
  margin-bottom: 18px;
  font-size: 1.06rem;
}

.step-tag {
  margin-top: auto;
  padding-top: 14px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--teal-dark);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ─────────────────────────── Offers ─────────────────────────── */

.offer-grid.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
}

.offer-card {
  display: flex;
  flex-direction: column;
  position: relative;
}

.offer-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--teal), var(--sky));
  color: white;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 6px 14px rgba(14, 128, 162, 0.3);
  white-space: nowrap;
}

.featured-offer {
  background: linear-gradient(180deg, rgba(15, 118, 110, 0.07), rgba(255, 255, 255, 0.99));
  border-color: rgba(15, 118, 110, 0.28);
  box-shadow: 0 20px 50px rgba(15, 118, 110, 0.14);
  transform: translateY(-4px);
}

.offer-summary {
  min-height: 66px;
  color: var(--muted);
  margin-bottom: 18px;
}

.price-tag {
  font-size: 3rem;
  line-height: 1;
  font-weight: 800;
  margin: 8px 0 6px;
  color: var(--text-strong);
  letter-spacing: -0.04em;
}

.price-currency {
  font-size: 1rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.05em;
  vertical-align: super;
}

.offer-footnote {
  color: var(--teal-dark);
  font-weight: 700;
  margin-bottom: 20px;
  font-size: 0.88rem;
}

.muted-footnote {
  color: var(--muted);
  font-weight: 600;
}

.offer-card .clean-list {
  margin-bottom: 22px;
}

.offer-cta {
  margin-top: auto;
  width: 100%;
}

.guarantee-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 44px;
  padding: 24px 28px;
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.09), rgba(14, 165, 233, 0.06));
  border: 1px solid rgba(15, 118, 110, 0.22);
  border-radius: 20px;
}

.guarantee-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--teal);
  box-shadow: var(--shadow-soft);
}

.guarantee-body {
  color: var(--text);
  font-size: 1rem;
  line-height: 1.55;
}

.guarantee-body strong {
  color: var(--text-strong);
}

/* ─────────────────────────── Principles ─────────────────────────── */

.principles-grid.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.principle-card {
  position: relative;
  padding-top: 32px;
}

.principle-number {
  position: absolute;
  top: 22px;
  right: 24px;
  font-size: 0.85rem;
  font-weight: 800;
  color: rgba(15, 118, 110, 0.45);
  letter-spacing: 0.08em;
}

/* ─────────────────────────── FAQ ─────────────────────────── */

.faq-layout {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 36px;
  align-items: start;
}

.faq-grid.two-up {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.faq-card h3 {
  color: var(--text-strong);
  margin-bottom: 10px;
}

.faq-card p {
  margin: 0;
  font-size: 0.95rem;
}

/* ─────────────────────────── CTA form ─────────────────────────── */

.cta-section {
  padding-top: 40px;
  padding-bottom: 60px;
}

.cta-panel {
  text-align: left;
  padding: 48px;
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.08), rgba(14, 165, 233, 0.08), rgba(255,255,255,0.96));
  border-color: rgba(15, 118, 110, 0.22);
  box-shadow: var(--shadow);
  max-width: 820px;
  margin: 0 auto;
}

.cta-panel h2 {
  margin-top: 12px;
  max-width: 20ch;
}

.cta-lead {
  font-size: 1.08rem;
  color: #334650;
  max-width: 60ch;
  margin-bottom: 32px;
}

.audit-form {
  display: grid;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.audit-form label {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-strong);
}

.audit-form label.full {
  grid-column: 1 / -1;
}

.audit-form label span {
  display: block;
  margin-bottom: 7px;
}

.audit-form input,
.audit-form textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: white;
  font-family: inherit;
  font-size: 0.98rem;
  color: var(--text-strong);
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.audit-form input:focus,
.audit-form textarea:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.14);
}

.audit-form textarea {
  resize: vertical;
  min-height: 90px;
}

.audit-form .button {
  margin-top: 8px;
  justify-self: start;
  min-width: 240px;
}

.form-footnote {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted-soft);
}

.cta-secondary {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-soft);
  font-size: 0.95rem;
  color: var(--muted);
  text-align: center;
}

/* ─────────────────────────── Footer ─────────────────────────── */

.footer {
  padding: 60px 0 36px;
  color: var(--muted);
  background: linear-gradient(180deg, transparent, rgba(236, 244, 245, 0.4));
  border-top: 1px solid var(--border-soft);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 24px;
}

.footer-brand .brand-lockup {
  margin-bottom: 16px;
}

.footer-blurb {
  max-width: 44ch;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-label {
  background: transparent;
  color: var(--text-strong);
  border: 0;
  padding: 0 0 6px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-col a {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 150ms ease;
}

.footer-col a:hover {
  color: var(--teal-dark);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--muted-soft);
}

/* ─────────────────────────── Responsive ─────────────────────────── */

@media (max-width: 1080px) {
  .hero-grid,
  .split-section,
  .faq-layout {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 0;
  }

  .hero-image-card img {
    min-height: 380px;
  }

  .floating-note {
    position: static;
    margin-top: 18px;
    width: auto;
  }

  .offer-grid.three-up,
  .principles-grid.three-up,
  .problem-grid.three-up {
    grid-template-columns: 1fr;
  }

  .steps-grid.four-up {
    grid-template-columns: repeat(2, 1fr);
  }

  .faq-grid.two-up {
    grid-template-columns: 1fr;
  }

  .featured-offer {
    transform: none;
  }

  .nav-links {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (max-width: 720px) {
  section {
    padding: 64px 0;
  }

  .hero-section {
    padding-top: 36px;
    padding-bottom: 36px;
  }

  h1 {
    font-size: clamp(2.1rem, 9vw, 3rem);
  }

  h2 {
    font-size: clamp(1.7rem, 7vw, 2.4rem);
  }

  .card,
  .cta-panel {
    padding: 24px;
  }

  .cta-panel {
    padding: 28px 22px;
  }

  .actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .button.small {
    width: auto;
  }

  .brand-sub {
    font-size: 0.78rem;
  }

  .trust-cluster {
    gap: 14px 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .audit-form .button {
    min-width: 0;
    width: 100%;
  }

  .math-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px 14px;
  }

  .math-row > div:nth-child(3) {
    grid-column: 2;
    text-align: right;
  }

  .leak-row {
    grid-template-columns: 110px 1fr 44px;
    gap: 8px;
    font-size: 0.78rem;
  }

  .guarantee-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
  }

  .steps-grid.four-up {
    grid-template-columns: 1fr;
  }
}