/* ==========================================================================
   Livewellness Online Shop — Landing Page Styles
   ========================================================================== */

:root {
  --green-900: #0a3018;
  --green-800: #0d3f20;
  --green-700: #145c30;
  --green-600: #1c7a40;
  --green-50: #eef7f0;

  --gold-700: #a3781f;
  --gold-600: #b3812f;
  --gold-500: #c8974a;
  --gold-400: #d9b46b;
  --gold-100: #faf3e2;

  --red-600: #d21a2b;
  --red-700: #b01323;

  --ink: #1c2420;
  --ink-soft: #4a564e;
  --paper: #ffffff;
  --paper-soft: #f7f8f4;
  --border: #e4e7e0;

  --shadow-sm: 0 2px 8px rgba(10, 48, 24, 0.08);
  --shadow-md: 0 8px 24px rgba(10, 48, 24, 0.12);
  --shadow-lg: 0 20px 48px rgba(10, 48, 24, 0.16);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;

  --container: 1200px;
  --header-h: 84px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  width: 100%;
}
body, h1, h2, h3, h4, p, ul, figure { margin: 0; }
ul { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font: inherit; }

body {
  font-family: "Poppins", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: "Playfair Display", Georgia, "Times New Roman", serif;
  color: var(--green-900);
  line-height: 1.2;
  font-weight: 700;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-700);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-500), var(--green-600));
  display: inline-block;
}

.section {
  padding: 96px 0;
}
.section--tight { padding: 64px 0; }
.section--muted { background: var(--paper-soft); }
.section--dark {
  background: linear-gradient(160deg, var(--green-900), var(--green-800) 60%, var(--green-700));
  color: #eaf3ec;
}
.section--dark h2, .section--dark h3 { color: #fff; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section-head {
  max-width: 660px;
  margin: 0 auto 56px;
  text-align: center;
}
.section-head h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  margin-bottom: 14px;
}
.section-head p {
  color: var(--ink-soft);
  font-size: 1.05rem;
}
.section--dark .section-head p { color: #cfe3d5; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(0.99); }

.btn--primary {
  background: linear-gradient(120deg, var(--gold-600), var(--gold-400));
  color: var(--green-900);
  box-shadow: var(--shadow-md);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.btn--outline {
  background: transparent;
  color: var(--green-900);
  border: 1.5px solid var(--green-800);
}
.btn--outline:hover { background: var(--green-900); color: #fff; }

.btn--light {
  background: #fff;
  color: var(--green-900);
}
.btn--light:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.btn--ghost-light {
  background: rgba(255,255,255,0.08);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.5);
}
.btn--ghost-light:hover { background: rgba(255,255,255,0.18); }

.btn--sm { padding: 11px 22px; font-size: 0.9rem; }
.btn--block { width: 100%; }

/* ---------- Top utility bar ---------- */
.topbar {
  background: var(--green-900);
  color: #d9e8dd;
  font-size: 0.82rem;
}
.topbar__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 24px;
  max-width: var(--container);
  margin: 0 auto;
  gap: 12px;
  flex-wrap: wrap;
}
.topbar__contact { display: flex; gap: 22px; flex-wrap: wrap; min-width: 0; }
.topbar__contact a { display: inline-flex; align-items: center; gap: 6px; opacity: 0.92; transition: opacity .2s; overflow-wrap: anywhere; }
.topbar__contact a:hover { opacity: 1; color: var(--gold-400); }
.topbar__tag { opacity: 0.85; letter-spacing: 0.03em; }
.topbar svg { width: 14px; height: 14px; flex-shrink: 0; }

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s ease, padding 0.3s ease;
}
.header.is-scrolled { box-shadow: var(--shadow-sm); }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  transition: height 0.3s ease;
}
.header.is-scrolled .nav { height: 68px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 46px; width: auto; transition: height 0.3s ease; }
.header.is-scrolled .brand img { height: 38px; }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__text strong {
  font-family: "Playfair Display", serif;
  font-size: 1.05rem;
  color: var(--green-900);
}
.brand__text span {
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-700);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav__links a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--ink);
  position: relative;
  padding: 6px 0;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-500), var(--green-600));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.nav__links a:hover::after,
.nav__links a.is-active::after { transform: scaleX(1); }
.nav__links a:hover { color: var(--green-800); }

.nav__actions { display: flex; align-items: center; gap: 16px; }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  height: 24px;
  justify-content: center;
  z-index: 600;
}
.nav__toggle span {
  display: block;
  height: 2.5px;
  width: 100%;
  background: var(--green-900);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 84px 0 100px;
  background: radial-gradient(circle at 82% 12%, rgba(200, 151, 74, 0.16), transparent 55%),
              radial-gradient(circle at 8% 100%, rgba(20, 92, 48, 0.14), transparent 50%),
              var(--paper);
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}
.hero__copy h1 {
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  margin-bottom: 20px;
}
.hero__copy h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--gold-700), var(--gold-500));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__copy p {
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 520px;
  margin-bottom: 32px;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }

.hero__stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.hero__stats div strong {
  display: block;
  font-family: "Playfair Display", serif;
  font-size: 1.5rem;
  color: var(--green-900);
}
.hero__stats div span {
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero__visual::before {
  content: "";
  position: absolute;
  width: 90%;
  height: 90%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(20,92,48,0.16), rgba(200,151,74,0.10) 60%, transparent 72%);
  z-index: 0;
}
.hero__product {
  position: relative;
  z-index: 1;
  max-width: 340px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  transform: rotate(-2deg);
  transition: transform 0.4s ease;
}
.hero__product:hover { transform: rotate(0deg) translateY(-6px); }
.hero__badge {
  position: absolute;
  z-index: 2;
  background: #fff;
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--green-900);
}
.hero__badge svg { width: 18px; height: 18px; color: var(--gold-600); }
.hero__badge--1 { top: 8%; left: -2%; }
.hero__badge--2 { bottom: 10%; right: -4%; }

/* ---------- Marquee / trust strip ---------- */
.trust {
  background: var(--green-900);
  padding: 22px 0;
  overflow: hidden;
}
.trust__track {
  display: flex;
  gap: 56px;
  white-space: nowrap;
  animation: marquee 26s linear infinite;
  width: max-content;
}
.trust__track span {
  color: #d9e8dd;
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.trust__track span::before { content: "✦"; color: var(--gold-500); }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- About ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: center;
}
.about__art {
  position: relative;
  display: flex;
  justify-content: center;
}
.about__art img {
  width: 100%;
  max-width: 320px;
  padding: 40px;
  background: var(--green-50);
  border-radius: var(--radius-lg);
}
.about__list { display: grid; gap: 18px; margin-top: 28px; }
.about__list li { display: flex; gap: 14px; align-items: flex-start; }
.about__list .ico {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 12px;
  background: var(--green-50);
  color: var(--green-700);
  display: flex; align-items: center; justify-content: center;
}
.about__list h4 { font-size: 1.02rem; margin-bottom: 3px; color: var(--ink); font-family: inherit; font-weight: 600; }
.about__list p { color: var(--ink-soft); font-size: 0.94rem; }

/* ---------- Flagship Product ---------- */
.product {
  position: relative;
}
.product__wrap {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: center;
}

.product__gallery { position: relative; }
.product__main {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: #111;
  cursor: zoom-in;
  position: relative;
}
.product__main img {
  width: 100%;
  transition: transform 0.5s ease;
}
.product__main:hover img { transform: scale(1.035); }
.product__zoom-hint {
  position: absolute;
  right: 14px; bottom: 14px;
  background: rgba(0,0,0,0.55);
  color: #fff;
  font-size: 0.75rem;
  padding: 6px 12px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 6px;
  backdrop-filter: blur(4px);
}
.product__thumbs {
  display: flex;
  gap: 14px;
  margin-top: 16px;
}
.product__thumbs button {
  flex: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid transparent;
  padding: 0;
  background: #111;
  transition: border-color 0.2s ease, opacity 0.2s ease;
  opacity: 0.72;
}
.product__thumbs button.is-active { border-color: var(--gold-500); opacity: 1; }
.product__thumbs img { width: 100%; height: 90px; object-fit: cover; object-position: top; }

.product__net {
  position: absolute;
  top: -14px; left: -14px;
  background: var(--red-600);
  color: #fff;
  font-weight: 700;
  font-size: 0.78rem;
  padding: 10px 14px;
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  z-index: 2;
}

.product__info h3 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  margin-bottom: 10px;
}
.product__info .tagline {
  color: var(--red-600);
  font-weight: 600;
  margin-bottom: 16px;
  font-size: 0.98rem;
}
.product__info > p {
  color: var(--ink-soft);
  margin-bottom: 22px;
}

.tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.tag-row span {
  background: var(--gold-100);
  color: var(--gold-700);
  border: 1px solid var(--gold-400);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 999px;
}

.product__cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 28px;
}
.product__box {
  background: var(--paper-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 22px;
}
.product__box h4 {
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--green-900);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.product__box ul { display: grid; gap: 8px; }
.product__box li {
  font-size: 0.9rem;
  color: var(--ink-soft);
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.product__box li::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold-500);
  flex-shrink: 0;
  transform: translateY(-2px);
}

.nutri {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}
.nutri td { padding: 6px 0; border-bottom: 1px dashed var(--border); color: var(--ink-soft); }
.nutri tr:last-child td { border-bottom: none; }
.nutri td:last-child { text-align: right; font-weight: 600; color: var(--ink); }
.nutri .cal td { font-size: 1.3rem; font-weight: 700; color: var(--green-800); }

.product__actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- Prepare steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  counter-reset: step;
}
.step {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  text-align: center;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.step:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.step__num {
  width: 52px; height: 52px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green-800), var(--green-600));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: "Playfair Display", serif;
  font-size: 1.3rem;
  font-weight: 700;
}
.step h4 { font-family: inherit; font-size: 1.02rem; font-weight: 600; margin-bottom: 8px; color: var(--ink); }
.step p { color: var(--ink-soft); font-size: 0.92rem; }

/* ---------- Benefits grid ---------- */
.benefits {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.benefit {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  transition: transform 0.3s ease, background 0.3s ease;
}
.benefit:hover { transform: translateY(-6px); background: rgba(255,255,255,0.1); }
.benefit__ico {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--gold-600), var(--gold-400));
  color: var(--green-900);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.benefit h4 { color: #fff; font-family: inherit; font-size: 1.02rem; font-weight: 600; margin-bottom: 8px; }
.benefit p { color: #cfe3d5; font-size: 0.9rem; }

/* ---------- FAQ ---------- */
.faq { max-width: 780px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--paper);
}
.faq-item__q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  font-weight: 600;
  color: var(--green-900);
  text-align: left;
}
.faq-item__q .plus {
  width: 24px; height: 24px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--green-50);
  color: var(--green-800);
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.3s ease, background 0.3s ease;
}
.faq-item.is-open .plus { transform: rotate(45deg); background: var(--gold-400); color: var(--green-900); }
.faq-item__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--ink-soft);
  font-size: 0.94rem;
}
.faq-item.is-open .faq-item__a { padding: 0 24px 22px; }

/* ---------- CTA banner ---------- */
.cta-banner {
  background: linear-gradient(120deg, var(--gold-600), var(--gold-400));
  border-radius: var(--radius-lg);
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-lg);
}
.cta-banner h3 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: 8px; }
.cta-banner p { color: #4a3c17; }
.cta-banner__actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Contact ---------- */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
.contact__list { display: grid; gap: 20px; margin-top: 28px; }
.contact__list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 18px 20px;
  background: var(--paper-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  min-width: 0;
}
.contact__list .ico {
  width: 42px; height: 42px;
  border-radius: 12px;
  background: var(--green-900);
  color: var(--gold-400);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.contact__list li > div { min-width: 0; }
.contact__list strong { display: block; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-soft); margin-bottom: 2px; }
.contact__list a, .contact__list span.value {
  font-weight: 600;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.form {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}
.form h3 { font-size: 1.3rem; margin-bottom: 6px; }
.form > p { color: var(--ink-soft); font-size: 0.92rem; margin-bottom: 24px; }
.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 7px;
}
.field input, .field textarea {
  width: 100%;
  padding: 13px 15px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: var(--paper-soft);
  transition: border-color 0.2s ease, background 0.2s ease;
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--gold-500);
  background: #fff;
}
.field textarea { resize: vertical; min-height: 100px; }
.field-error {
  font-size: 0.78rem;
  color: var(--red-600);
  margin-top: 5px;
  display: none;
}
.field.has-error input, .field.has-error textarea { border-color: var(--red-600); }
.field.has-error .field-error { display: block; }

.form-note {
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-top: 14px;
  text-align: center;
}
.form-success {
  display: none;
  align-items: center;
  gap: 10px;
  background: var(--green-50);
  color: var(--green-800);
  border: 1px solid #cfe6d6;
  padding: 14px 16px;
  border-radius: 10px;
  font-size: 0.9rem;
  margin-top: 16px;
}
.form-success.is-visible { display: flex; }

/* ---------- Footer ---------- */
.footer {
  background: var(--green-900);
  color: #cfe3d5;
  padding: 72px 0 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.footer__brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer__brand strong { font-family: "Playfair Display", serif; color: #fff; font-size: 1.2rem; }
.footer__brand span { font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gold-400); }
.footer p.desc { max-width: 320px; font-size: 0.9rem; color: #b7cdbd; }
.footer h5 {
  color: #fff;
  font-size: 0.86rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 18px;
  font-family: inherit;
}
.footer ul { display: grid; gap: 12px; }
.footer ul a { font-size: 0.92rem; color: #cfe3d5; transition: color 0.2s ease, padding-left 0.2s ease; overflow-wrap: anywhere; }
.footer ul a:hover { color: var(--gold-400); padding-left: 4px; }
.footer__social { display: flex; gap: 10px; margin-top: 18px; }
.footer__social a {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.25);
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s ease, border-color 0.2s ease;
}
.footer__social a:hover { background: var(--gold-500); border-color: var(--gold-500); color: var(--green-900); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
  font-size: 0.82rem;
  color: #9fb8a8;
  flex-wrap: wrap;
  gap: 10px;
}
.footer__bottom a:hover { color: var(--gold-400); }

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--green-900);
  color: var(--gold-400);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
  z-index: 400;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--green-700); }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(6, 20, 11, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
  padding: 24px;
}
.lightbox.is-open { opacity: 1; visibility: visible; }
.lightbox img {
  max-height: 88vh;
  max-width: min(90vw, 480px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}
.lightbox__close {
  position: absolute;
  top: 24px; right: 28px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(255,255,255,0.3);
}
.lightbox__close:hover { background: rgba(255,255,255,0.2); }

/* ---------- Reveal animation ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Utility ---------- */
.mobile-only { display: none; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { order: -1; max-width: 340px; margin: 0 auto 24px; }
  .about__grid { grid-template-columns: 1fr; }
  .about__art { order: -1; }
  .product__wrap { grid-template-columns: 1fr; }
  .product__gallery { max-width: 420px; margin: 0 auto 40px; width: 100%; }
  .benefits { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .contact__grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .nav__links {
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: min(320px, 78vw);
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 8px;
    padding: 110px 32px 32px;
    box-shadow: -12px 0 40px rgba(0,0,0,0.12);
    transform: translateX(100%);
    transition: transform 0.35s ease;
    z-index: 550;
  }
  .nav__links.is-open { transform: translateX(0); }
  .nav__links a { width: 100%; padding: 12px 0; font-size: 1.05rem; }
  .nav__toggle { display: flex; }
  .nav__actions .btn--sm.desktop-only { display: none; }
  .mobile-only { display: inline-flex; }

  .topbar__inner { justify-content: center; text-align: center; }

  .steps { grid-template-columns: 1fr; }
  .product__cols { grid-template-columns: 1fr; }
  .cta-banner { flex-direction: column; text-align: center; padding: 40px 28px; }
  .cta-banner__actions { justify-content: center; }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .hero { padding: 48px 0 64px; }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn { width: 100%; }
  .hero__stats { justify-content: space-between; gap: 16px; }
  .benefits { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; text-align: center; }
  .product__thumbs { flex-wrap: wrap; }
  .form { padding: 26px 22px; }
  .cta-banner { border-radius: var(--radius-md); }
  .hero__badge { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}