/* =========================================================
   LEEMO'S ENGLISH — STYLESHEET
   Palette sampled directly from Leemo's artwork:
   blue #2C67B7, orange #FB9A1B, red #E94F3D, cream #FDF6EC, cocoa #4A2E1C
   Type: Baloo 2 (display/headings) + Nunito (body)
   ========================================================= */

:root {
  /* --- Color tokens (grounded in Leemo's own artwork) --- */
  --blue: #2C67B7;
  --blue-deep: #1B4A8A;
  --blue-pale: #E7F0FB;
  --orange: #FB9A1B;
  --orange-deep: #D97F06;
  --red: #E94F3D;
  --red-deep: #BE302A;
  --cream: #FDF6EC;
  --cream-deep: #F7E9D2;
  --cocoa: #4A2E1C;
  --cocoa-deep: #34200F;
  --sky-mist: #BFE0F5;
  --sky-mist-deep: #9BCBEB;
  --white: #FFFFFF;

  /* --- Semantic tokens --- */
  --color-text: var(--cocoa);
  --color-text-soft: #6B5744;
  --color-bg: var(--cream);
  --color-shadow: rgba(74, 46, 28, 0.18);

  /* --- Type --- */
  --font-display: "Baloo 2", "Segoe UI Rounded", system-ui, sans-serif;
  --font-body: "Nunito", "Segoe UI", system-ui, sans-serif;

  /* --- Spacing scale --- */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --section-pad: clamp(3.5rem, 6vw, 6rem);

  /* --- Radius / shadow --- */
  --radius-sm: 14px;
  --radius-md: 22px;
  --radius-lg: 34px;
  --radius-pill: 999px;
  --shadow-soft: 0 22px 44px -22px var(--color-shadow);
  --shadow-lift: 0 14px 26px -14px var(--color-shadow);

  --header-h: 76px;
}

/* =========================================================
   RESET / BASE
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  font-size: 1.05rem;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { font-family: var(--font-display); margin: 0; line-height: 1.15; color: var(--cocoa-deep); }
p { margin: 0; }
button { font: inherit; cursor: pointer; }
input { font: inherit; }

section[id] { scroll-margin-top: var(--header-h); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--cocoa-deep);
  color: var(--cream);
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 999;
}
.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 3px solid var(--blue-deep);
  outline-offset: 3px;
  border-radius: 4px;
}

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

/* =========================================================
   LAYOUT UTILITIES
   ========================================================= */
.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}
.container.narrow { max-width: 760px; }
.center { text-align: center; }

.section { padding-block: var(--section-pad); }
.section-sub {
  max-width: 62ch;
  color: var(--color-text-soft);
  font-size: 1.1rem;
  margin-top: var(--space-2);
}
.section-head { max-width: 62ch; }
.section-head h2 { font-size: clamp(1.8rem, 1.3rem + 2vw, 2.6rem); }

/* Alternate section background bands */
.bg-white { background: var(--white); }
.bg-cream-deep { background: var(--cream-deep); }
.bg-sky { background: var(--sky-mist); }
.bg-blue { background: var(--blue-deep); color: var(--cream); }
.bg-blue h2, .bg-blue h3 { color: var(--white); }
.bg-cocoa { background: var(--cocoa-deep); color: var(--cream); }

/* =========================================================
   BUTTONS
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--orange);
  color: var(--cocoa-deep);
  box-shadow: var(--shadow-lift);
}
.btn-primary:hover { background: var(--orange-deep); }

.btn-outline {
  background: transparent;
  border-color: var(--blue-deep);
  color: var(--blue-deep);
}
.btn-outline:hover { background: var(--blue-deep); color: var(--white); }

.btn-dark {
  background: var(--cocoa-deep);
  color: var(--cream);
}
.btn-dark:hover { background: #23140a; }

.btn-youtube {
  background: var(--red-deep);
  color: var(--white);
  box-shadow: var(--shadow-lift);
}
.btn-youtube:hover { background: #9c261f; }

.btn-lg { padding: 1rem 2rem; font-size: 1.1rem; }
.btn-sm { padding: 0.55rem 1.15rem; font-size: 0.9rem; }

/* =========================================================
   ANNOUNCEMENT BAR
   ========================================================= */
.announce-bar {
  background: var(--cocoa-deep);
  color: var(--cream);
  text-align: center;
  font-size: 0.9rem;
  padding: 0.6rem 1rem;
}
.announce-bar a {
  color: var(--orange);
  font-weight: 700;
  border-bottom: 1px solid rgba(251, 154, 27, 0.5);
}

/* =========================================================
   HEADER / NAV
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(253, 246, 236, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.site-header.is-scrolled {
  box-shadow: 0 8px 24px -16px var(--color-shadow);
  border-bottom-color: rgba(74, 46, 28, 0.08);
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--cocoa-deep);
  flex-shrink: 0;
}
.logo-mark {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--sky-mist);
  padding: 3px;
  object-fit: contain;
}
.site-nav {
  display: flex;
  gap: 1.75rem;
}
.site-nav a {
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--color-text);
  padding: 0.4rem 0.1rem;
  border-bottom: 2px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.site-nav a:hover,
.site-nav a.is-active { border-color: var(--orange); color: var(--blue-deep); }

.header-actions { display: flex; align-items: center; gap: 0.75rem; }
.header-actions .btn { display: none; }

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border: none;
  background: var(--sky-mist);
  border-radius: var(--radius-sm);
  padding: 0;
  align-items: center;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2.5px;
  background: var(--cocoa-deep);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

@media (max-width: 899px) {
  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--cream);
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 1.5rem 1.25rem;
    box-shadow: 0 16px 24px -16px var(--color-shadow);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .site-nav a { padding: 0.7rem 0; border-bottom: 1px solid rgba(74,46,28,0.08); }
}
@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .header-actions .btn { display: inline-flex; }
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(2.5rem, 5vw, 4.5rem) 0;
}
.hero-grid {
  display: grid;
  gap: var(--space-5);
  align-items: center;
}
.hero-copy h1 {
  font-size: clamp(2.3rem, 1.6rem + 3vw, 3.6rem);
  color: var(--cocoa-deep);
}
.hero-sub {
  margin-top: var(--space-3);
  font-size: 1.15rem;
  color: var(--color-text-soft);
  max-width: 52ch;
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: var(--space-4);
}
.trust-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: var(--space-4);
}
.trust-chips li {
  background: var(--white);
  border: 1px solid rgba(74,46,28,0.1);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-text-soft);
}

.hero-art {
  position: relative;
  display: flex;
  justify-content: center;
  padding-block: 1rem;
}
.hero-blob {
  position: absolute;
  inset: 0;
  margin: auto;
  width: min(92%, 480px);
  aspect-ratio: 1 / 1;
  background: linear-gradient(160deg, var(--sky-mist) 0%, var(--blue-pale) 100%);
  border-radius: 62% 38% 55% 45% / 48% 55% 45% 52%;
}
.hero-owl {
  position: relative;
  width: min(80%, 380px);
  filter: drop-shadow(0 24px 30px rgba(74,46,28,0.22));
}
.floaty {
  position: absolute;
  background: var(--white);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: var(--shadow-lift);
  color: var(--cocoa-deep);
}
.floaty-1 { top: 8%; left: 2%; }
.floaty-2 { bottom: 12%; right: 0%; }
.floaty-3 {
  top: 42%;
  right: 6%;
  font-size: 1.4rem;
  padding: 0.4rem 0.55rem;
  color: var(--orange);
}

@media (prefers-reduced-motion: no-preference) {
  .hero-owl { animation: float 5s ease-in-out infinite; }
  .floaty-1 { animation: float 6s ease-in-out infinite; }
  .floaty-2 { animation: float 5.5s ease-in-out infinite reverse; }
  .floaty-3 { animation: spin-slow 12s linear infinite; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-wave {
  width: 100%;
  line-height: 0;
  margin-top: clamp(2rem, 5vw, 3.5rem);
}
.hero-wave svg { width: 100%; height: auto; display: block; }

@media (min-width: 900px) {
  .hero-grid { grid-template-columns: 1.05fr 0.95fr; }
  .hero-copy { text-align: left; }
}
@media (max-width: 899px) {
  .hero-copy { text-align: center; }
  .hero-sub { margin-inline: auto; }
  .hero-ctas, .trust-chips { justify-content: center; }
}

/* =========================================================
   MEET LEEMO
   ========================================================= */
.meet-leemo .container { text-align: center; }
.meet-leemo h2 { font-size: clamp(1.8rem, 1.3rem + 2vw, 2.6rem); }
.meet-leemo > .container > p {
  max-width: 62ch;
  margin: var(--space-2) auto 0;
  font-size: 1.1rem;
  color: var(--color-text-soft);
}
.trust-points {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-5);
  text-align: left;
}
.trust-points li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.trust-points .point-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  background: var(--sky-mist);
}
.trust-points strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--cocoa-deep);
}
.trust-points span { color: var(--color-text-soft); font-size: 0.98rem; }

@media (min-width: 700px) {
  .trust-points { grid-template-columns: repeat(3, 1fr); }
}

/* =========================================================
   HOW IT WORKS
   ========================================================= */
.how-it-works .section-head { margin-inline: auto; text-align: center; }
.how-it-works .section-sub { margin-inline: auto; }
.steps {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-6);
  counter-reset: none;
}
.steps > li {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}
.step-num {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--sky-mist-deep);
  line-height: 1;
  flex-shrink: 0;
}
.steps h3 { font-size: 1.3rem; margin-bottom: 0.4rem; color: var(--cocoa-deep); }
.steps p { color: var(--color-text-soft); }

@media (min-width: 800px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
}

/* =========================================================
   VIDEOS
   ========================================================= */
.videos .section-head { text-align: center; margin-inline: auto; }
.videos .section-sub { margin-inline: auto; }

.video-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-5);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .video-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .video-grid { grid-template-columns: repeat(3, 1fr); } }

.video-card { display: block; }
.video-thumb {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--grad-a, var(--blue)), var(--grad-b, var(--sky-mist)));
  overflow: hidden;
  transition: transform 0.2s ease;
}
.video-card:hover .video-thumb { transform: translateY(-4px); }
.play-icon {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 58px; height: 58px;
  background: rgba(255,255,255,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--cocoa-deep);
  padding-left: 4px;
}
.video-length {
  position: absolute;
  bottom: 0.6rem; right: 0.6rem;
  background: rgba(52, 32, 15, 0.75);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
}
.video-title {
  display: block;
  margin-top: 0.85rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--cocoa-deep);
}
.videos-cta { text-align: center; margin-top: var(--space-5); }

/* =========================================================
   SHOP
   ========================================================= */
.shop .section-head { text-align: center; margin-inline: auto; }
.shop .section-sub { margin-inline: auto; }

.shop-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
  margin-top: var(--space-4);
}
.filter-btn {
  border: 2px solid var(--cocoa-deep);
  background: transparent;
  color: var(--cocoa-deep);
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.filter-btn.active,
.filter-btn:hover {
  background: var(--cocoa-deep);
  color: var(--cream);
}

.shop-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-5);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .shop-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .shop-grid { grid-template-columns: repeat(4, 1fr); } }

.product-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  padding-top: 3.5rem;
  position: relative;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease;
}
.product-card:hover { transform: translateY(-4px); }
.product-tab {
  position: absolute;
  top: -18px;
  left: var(--space-3);
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: var(--shadow-lift);
}
.product-card h3 { font-size: 1.1rem; margin-bottom: 0.4rem; }
.product-card p { color: var(--color-text-soft); font-size: 0.92rem; flex-grow: 1; }
.product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: var(--space-2);
}
.price-tag {
  position: relative;
  background: var(--cream-deep);
  color: var(--cocoa-deep);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.35rem 0.8rem 0.35rem 1.1rem;
  clip-path: polygon(12px 0, 100% 0, 100% 100%, 12px 100%, 0 50%);
}
.product-card[hidden] { display: none; }

.shop-note {
  text-align: center;
  margin-top: var(--space-5);
  color: var(--color-text-soft);
  font-size: 0.95rem;
}
.shop-note a { color: var(--blue-deep); font-weight: 700; border-bottom: 1px solid var(--blue-deep); }

/* =========================================================
   REVIEWS
   ========================================================= */
.reviews .section-head { text-align: center; margin-inline: auto; }
.review-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-5);
}
@media (min-width: 800px) { .review-grid { grid-template-columns: repeat(3, 1fr); } }

.review-bubble {
  position: relative;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin: 0 0 1rem;
}
.review-bubble::after {
  content: "";
  position: absolute;
  bottom: -14px;
  left: 2.2rem;
  border-width: 14px 12px 0 0;
  border-style: solid;
  border-color: rgba(255,255,255,0.14) transparent transparent transparent;
}
.review-bubble p { font-size: 1.02rem; margin-bottom: 0.9rem; }
.review-bubble cite {
  font-style: normal;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--sky-mist);
  display: block;
}

/* =========================================================
   FAQ
   ========================================================= */
.faq .section-head { text-align: center; margin-inline: auto; }
.faq-list { margin-top: var(--space-5); }
.faq-item {
  border-bottom: 1px solid rgba(74,46,28,0.12);
  padding-block: 1.1rem;
}
.faq-item summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--cocoa-deep);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  font-size: 1.4rem;
  color: var(--orange-deep);
  transition: transform 0.2s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p {
  margin-top: 0.8rem;
  color: var(--color-text-soft);
  max-width: 65ch;
}

/* =========================================================
   NEWSLETTER
   ========================================================= */
.newsletter { background: linear-gradient(135deg, var(--orange) 0%, var(--orange-deep) 100%); }
.newsletter h2, .newsletter p { color: var(--cocoa-deep); }
.newsletter .section-sub { color: #5c3d10; margin-inline: auto; }
.newsletter-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: var(--space-4);
}
.newsletter-form input {
  flex: 1 1 260px;
  max-width: 340px;
  padding: 0.85rem 1.2rem;
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  font-size: 1rem;
}
.newsletter-form input:focus { outline: 3px solid var(--cocoa-deep); outline-offset: 2px; }
.form-note { margin-top: 0.9rem; font-size: 0.85rem; color: #5c3d10; }

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer { padding-block: var(--space-6) var(--space-4); }
.footer-grid {
  display: grid;
  gap: var(--space-5);
}
.footer-brand .logo { color: var(--cream); margin-bottom: 0.9rem; }
.footer-brand .logo-mark { background: rgba(255,255,255,0.12); }
.footer-brand p { color: rgba(253,246,236,0.72); max-width: 34ch; font-size: 0.95rem; }
.footer-col h4 {
  font-size: 0.95rem;
  color: var(--cream);
  margin-bottom: 0.9rem;
}
.footer-col a {
  display: block;
  color: rgba(253,246,236,0.72);
  padding-block: 0.35rem;
  font-size: 0.95rem;
  transition: color 0.15s ease;
}
.footer-col a:hover { color: var(--orange); }

.social-links { display: flex; gap: 0.6rem; margin-top: 1.1rem; }
.social-links a {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center;
  transition: background-color 0.15s ease;
}
.social-links a:hover { background: var(--orange); }
.social-links svg { width: 18px; height: 18px; fill: var(--cream); }

.footer-bottom {
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(253,246,236,0.15);
  text-align: center;
  font-size: 0.85rem;
  color: rgba(253,246,236,0.6);
}

@media (min-width: 700px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
}

/* =========================================================
   BACK TO TOP
   ========================================================= */
.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--blue-deep);
  color: var(--white);
  font-size: 1.2rem;
  box-shadow: var(--shadow-soft);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 90;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}