:root {
  --ink: #12333a;
  --muted: #5d7479;
  --paper: #f7fbf9;
  --aqua: #23aebf;
  --aqua-dark: #0f6f7a;
  --coral: #f06c59;
  --sun: #ffcc66;
  --white: #ffffff;
  --line: rgba(18, 51, 58, 0.14);
  --shadow: 0 24px 70px rgba(18, 51, 58, 0.15);
}

* {
  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;
  color: var(--ink);
  background: var(--paper);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select {
  font: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 0 clamp(18px, 5vw, 72px);
  background: rgba(247, 251, 249, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand,
.topbar nav,
.trust-row,
.price-row,
footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: conic-gradient(from 180deg, var(--aqua), var(--sun), var(--coral), var(--aqua));
  box-shadow: 0 10px 24px rgba(35, 174, 191, 0.28);
}

.topbar nav {
  gap: 26px;
  color: var(--muted);
  font-size: 14px;
}

.nav-cta,
.primary-btn,
.ghost-btn,
.checkout-btn,
.whatsapp-btn,
.lead-form button {
  min-height: 46px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  font-weight: 800;
}

.nav-cta,
.primary-btn,
.checkout-btn,
.lead-form button {
  color: var(--white);
  border: 0;
  background: var(--aqua-dark);
  box-shadow: 0 14px 30px rgba(15, 111, 122, 0.22);
  cursor: pointer;
}

.ghost-btn {
  border: 1px solid var(--line);
  background: var(--white);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.86fr);
  gap: clamp(28px, 6vw, 84px);
  align-items: center;
  min-height: calc(100svh - 76px);
  padding: clamp(38px, 7vw, 88px) clamp(18px, 5vw, 72px) 32px;
  overflow: hidden;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--aqua-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 20px;
  font-size: clamp(44px, 7vw, 92px);
  line-height: 0.94;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4.4vw, 56px);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.lead {
  max-width: 620px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 24px;
}

.trust-row {
  flex-wrap: wrap;
  gap: 10px;
}

.trust-row span {
  min-height: 34px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  min-height: 560px;
  display: grid;
  place-items: center;
}

.hero-visual::before {
  content: "";
  position: absolute;
  width: min(82vw, 520px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 24%, rgba(255, 204, 102, 0.9), transparent 26%),
    radial-gradient(circle at 76% 68%, rgba(240, 108, 89, 0.35), transparent 28%),
    linear-gradient(135deg, rgba(35, 174, 191, 0.18), rgba(255, 255, 255, 0));
}

.product-stage {
  position: relative;
  z-index: 1;
  width: min(90vw, 520px);
  aspect-ratio: 1;
}

.product-stage svg {
  width: 100%;
  height: 100%;
  animation: float 5s ease-in-out infinite;
}

.heat-card,
.battery-card {
  position: absolute;
  z-index: 2;
  display: grid;
  gap: 5px;
  min-width: 150px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.heat-card {
  top: 9%;
  right: 4%;
}

.battery-card {
  left: 2%;
  bottom: 13%;
}

.heat-card span,
.battery-card span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.heat-card strong,
.battery-card strong {
  font-size: 24px;
}

.proof,
.benefits,
.offer,
.reviews {
  padding: clamp(58px, 8vw, 104px) clamp(18px, 5vw, 72px);
}

.proof {
  display: grid;
  grid-template-columns: 0.55fr 1fr;
  gap: clamp(24px, 5vw, 60px);
  background: var(--white);
}

.proof-grid,
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.proof-grid article,
.review-grid figure,
.offer,
.lead-form {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.proof-grid article,
.review-grid figure {
  margin: 0;
  padding: 22px;
}

.proof-grid strong {
  display: block;
  margin-bottom: 10px;
  font-size: 19px;
}

.proof-grid p,
.benefit-copy p,
.feature p,
.offer-copy p,
.review-grid blockquote,
.microcopy {
  color: var(--muted);
  line-height: 1.6;
}

.benefits {
  display: grid;
  grid-template-columns: 0.85fr 1fr;
  gap: clamp(28px, 6vw, 84px);
  align-items: start;
}

.benefit-copy {
  position: sticky;
  top: 104px;
}

.feature-list {
  display: grid;
  gap: 14px;
}

.feature {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.feature span {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 8px;
  background: #dff5f3;
  color: var(--aqua-dark);
  font-weight: 900;
}

.offer {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.62fr);
  gap: clamp(24px, 6vw, 72px);
  align-items: center;
  margin: 0 clamp(18px, 5vw, 72px);
  padding: clamp(28px, 5vw, 60px);
  box-shadow: var(--shadow);
}

.price-row {
  gap: 14px;
  margin: 20px 0;
}

.old-price {
  color: var(--muted);
  font-size: 22px;
  text-decoration: line-through;
}

.price-row strong {
  color: var(--coral);
  font-size: 46px;
}

.quantity {
  display: inline-grid;
  grid-template-columns: 44px 60px 44px;
  align-items: center;
  min-height: 44px;
  margin-bottom: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.quantity button {
  height: 44px;
  border: 0;
  background: #edf7f6;
  color: var(--ink);
  cursor: pointer;
  font-weight: 900;
}

.quantity output {
  text-align: center;
  font-weight: 900;
}

.checkout-btn {
  width: 100%;
  max-width: 360px;
}

.whatsapp-btn {
  width: 100%;
  max-width: 360px;
  margin-top: 10px;
  border: 1px solid rgba(18, 51, 58, 0.16);
  color: var(--ink);
  background: #dff8e8;
}

.lead-form {
  display: grid;
  gap: 14px;
  padding: 22px;
}

.lead-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.lead-form input,
.lead-form select,
.lead-form textarea {
  min-height: 48px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 13px;
  color: var(--ink);
  background: var(--paper);
}

.lead-form textarea {
  min-height: 92px;
  padding-top: 12px;
  resize: vertical;
}

.review-grid blockquote {
  margin: 0 0 18px;
  font-size: 18px;
}

.review-grid figcaption {
  font-weight: 900;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  transform: translateY(24px);
  opacity: 0;
  max-width: min(420px, calc(100vw - 36px));
  padding: 14px 16px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--white);
  box-shadow: var(--shadow);
  transition: 0.25s ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

footer {
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(18px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

footer span:first-child {
  color: var(--ink);
  font-weight: 900;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(-1deg);
  }
  50% {
    transform: translateY(-16px) rotate(1deg);
  }
}

@media (max-width: 900px) {
  .topbar nav {
    display: none;
  }

  .hero,
  .proof,
  .benefits,
  .offer {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    min-height: 420px;
  }

  .benefit-copy {
    position: static;
  }

  .proof-grid,
  .review-grid {
    grid-template-columns: 1fr;
  }

  .offer {
    margin-inline: 18px;
  }
}

@media (max-width: 560px) {
  .topbar {
    min-height: 66px;
  }

  .nav-cta {
    display: none;
  }

  h1 {
    font-size: 42px;
  }

  .hero-actions > a,
  .checkout-btn {
    width: 100%;
  }

  .heat-card,
  .battery-card {
    min-width: 132px;
    padding: 13px;
  }

  .price-row {
    align-items: flex-start;
    flex-direction: column;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
  }
}