:root {
  --fizz: #22c3e6;
  --fizz-deep: #0b7fa3;
  --bubblegum: #ff6fae;
  --lemon: #ffe45c;
  --cream: #fffaf2;
  --ink: #1d2340;
  --ink-soft: #4b5375;
  --card: #ffffff;
  --radius: 28px;
  --shadow: 0 18px 40px -18px rgba(11, 127, 163, 0.45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Nunito", system-ui, sans-serif;
  color: var(--ink);
  background: var(--cream);
  overflow-x: hidden;
  line-height: 1.55;
}

h1, h2, h3, .logo { font-family: "Fredoka", "Nunito", sans-serif; line-height: 1.05; }

a { color: inherit; }

/* ---------- rising bubbles ---------- */
.bubbles { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.bubble {
  position: absolute;
  bottom: -60px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.95), rgba(34,195,230,0.25) 45%, rgba(34,195,230,0.08) 70%);
  border: 1px solid rgba(34,195,230,0.35);
  animation: rise linear infinite;
}
@keyframes rise {
  0%   { transform: translate(0, 0) scale(0.7); opacity: 0; }
  10%  { opacity: 1; }
  50%  { transform: translate(18px, -55vh) scale(1); }
  100% { transform: translate(-12px, -115vh) scale(1.15); opacity: 0; }
}

main, header, footer { position: relative; z-index: 1; }

/* ---------- nav ---------- */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1120px; margin: 0 auto; padding: 22px 16px;
}
.logo { font-size: 1.7rem; font-weight: 700; text-decoration: none; letter-spacing: -0.5px; }
.logo span { color: var(--fizz); }
.logo .drop { display: inline-block; animation: bob 2.4s ease-in-out infinite; }
@keyframes bob { 50% { transform: translateY(-5px) rotate(-8deg); } }
.nav-links { display: flex; gap: 20px; align-items: center; font-weight: 700; }
.nav-links a { text-decoration: none; }
.nav-links a:not(.btn):hover { color: var(--fizz-deep); }

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  font: 700 1.05rem "Fredoka", sans-serif;
  padding: 14px 28px;
  border-radius: 999px;
  border: 3px solid var(--ink);
  background: var(--lemon);
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
  box-shadow: 5px 5px 0 var(--ink);
  transition: transform 0.12s, box-shadow 0.12s;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 7px 7px 0 var(--ink); }
.btn:active { transform: translate(3px, 3px); box-shadow: 2px 2px 0 var(--ink); }
.btn.pink { background: var(--bubblegum); color: #fff; }
.btn.small { padding: 9px 18px; font-size: 0.95rem; box-shadow: 3px 3px 0 var(--ink); }

/* ---------- hero ---------- */
.hero {
  max-width: 1120px; margin: 0 auto; padding: 40px 16px 80px;
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center;
}
.eyebrow {
  display: inline-block; background: #fff; border: 2px solid var(--ink);
  border-radius: 999px; padding: 6px 14px; font-weight: 800; font-size: 0.85rem;
  transform: rotate(-2deg);
}
.hero h1 { font-size: clamp(2.8rem, 7vw, 5.2rem); margin: 18px 0; }
.hero h1 em { font-style: normal; color: var(--fizz); position: relative; }
.hero h1 em::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 4px; height: 12px;
  background: var(--lemon); z-index: -1; border-radius: 8px;
}
.hero p.lead { font-size: 1.25rem; color: var(--ink-soft); max-width: 34ch; }
.hero .ctas { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 28px; }

/* the product illustration */
.product-art { position: relative; aspect-ratio: 1; max-width: 440px; width: 100%; justify-self: center; }
.product-art svg { width: 100%; height: auto; overflow: visible; }
.spray circle { animation: spritz 1.4s ease-out infinite; transform-origin: center; }
@keyframes spritz {
  0% { transform: translate(0, 0); opacity: 0; }
  20% { opacity: 1; }
  100% { transform: translate(var(--dx), -150px); opacity: 0; }
}
.sticker {
  position: absolute; top: 4%; right: 0;
  width: 120px; height: 120px; border-radius: 50%;
  background: var(--bubblegum); color: #fff; border: 3px solid var(--ink);
  display: grid; place-items: center; text-align: center;
  font: 700 1rem/1.1 "Fredoka", sans-serif; transform: rotate(12deg);
  animation: wobble 3s ease-in-out infinite;
}
@keyframes wobble { 50% { transform: rotate(-6deg) scale(1.05); } }

/* ---------- marquee ---------- */
.marquee {
  background: var(--ink); color: var(--lemon); overflow: hidden; white-space: nowrap;
  font: 700 1.3rem "Fredoka", sans-serif; padding: 14px 0; transform: rotate(-1.5deg);
  margin: 0 -20px;
}
.marquee .track { display: inline-block; animation: scroll 22s linear infinite; }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ---------- sections ---------- */
section { max-width: 1120px; margin: 0 auto; padding: 90px 16px; }
.section-title { text-align: center; font-size: clamp(2rem, 5vw, 3.2rem); margin: 0 0 12px; }
.section-sub { text-align: center; color: var(--ink-soft); font-size: 1.15rem; margin: 0 auto 48px; max-width: 52ch; }

.benefits { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: var(--card); border: 3px solid var(--ink); border-radius: var(--radius);
  padding: 30px; box-shadow: 8px 8px 0 var(--fizz);
  transition: transform 0.2s;
}
.card:hover { transform: rotate(-1deg) translateY(-6px); }
.card:nth-child(2) { box-shadow: 8px 8px 0 var(--bubblegum); }
.card:nth-child(3) { box-shadow: 8px 8px 0 var(--lemon); }
.card .icon { font-size: 3rem; display: block; margin-bottom: 8px; }
.card h3 { font-size: 1.6rem; margin: 6px 0 10px; }
.card p { margin: 0; color: var(--ink-soft); }

/* how it works */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step { text-align: center; padding: 10px; }
.step::before {
  counter-increment: step; content: counter(step);
  display: grid; place-items: center; margin: 0 auto 14px;
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--fizz); color: #fff; border: 3px solid var(--ink);
  font: 700 1.6rem "Fredoka", sans-serif;
}
.step h3 { margin: 0 0 6px; font-size: 1.25rem; }
.step p { margin: 0; color: var(--ink-soft); font-size: 0.98rem; }

/* science band */
.band {
  background: linear-gradient(135deg, var(--fizz) 0%, var(--fizz-deep) 100%);
  color: #fff; border-radius: 40px; max-width: 1120px; margin: 0 auto;
  padding: 60px 40px; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
}
.band h2 { font-size: clamp(2rem, 4.5vw, 3rem); margin: 0 0 14px; }
.band p { font-size: 1.1rem; opacity: 0.95; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat {
  background: rgba(255,255,255,0.14); border: 2px solid rgba(255,255,255,0.5);
  border-radius: 20px; padding: 18px;
}
.stat b { display: block; font: 700 2.2rem "Fredoka", sans-serif; }
.stat small { opacity: 0.9; }

/* reviews */
.reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review {
  background: #fff; border-radius: var(--radius); padding: 26px; border: 3px solid var(--ink);
  position: relative;
}
.review:nth-child(odd) { transform: rotate(-1.2deg); }
.review:nth-child(even) { transform: rotate(1deg); }
.stars { color: #f5b700; font-size: 1.2rem; letter-spacing: 2px; }
.review p { font-size: 1.05rem; margin: 10px 0 14px; }
.review .who { font-weight: 800; }
.review .who small { display: block; font-weight: 600; color: var(--ink-soft); }

/* faq */
.faq { max-width: 760px; margin: 0 auto; }
details {
  background: #fff; border: 3px solid var(--ink); border-radius: 20px;
  padding: 18px 22px; margin-bottom: 14px;
}
summary { cursor: pointer; font: 700 1.15rem "Fredoka", sans-serif; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; font-size: 1.4rem; line-height: 1; transition: transform 0.2s; }
details[open] summary::after { transform: rotate(45deg); }
details p { color: var(--ink-soft); margin: 12px 0 0; }

/* final cta */
.final { text-align: center; }
.final h2 { font-size: clamp(2.4rem, 6vw, 4rem); margin: 0 0 18px; }

/* footer */
footer {
  text-align: center; padding: 40px 16px 60px; color: var(--ink-soft); font-size: 0.92rem;
  border-top: 3px dashed rgba(29,35,64,0.15); margin-top: 40px;
}
footer .logo { font-size: 1.3rem; }

/* ---------- shop page ---------- */
.shop {
  max-width: 1120px; margin: 0 auto; padding: 30px 16px 60px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start;
}
.gallery {
  background: linear-gradient(160deg, #e6f9fd, #ffe9f3); border: 3px solid var(--ink);
  border-radius: 40px; padding: 30px; position: sticky; top: 20px;
}
.gallery .product-art { max-width: 100%; }
.thumbs { display: flex; gap: 10px; margin-top: 16px; justify-content: center; flex-wrap: wrap; }
.thumbs span {
  background: #fff; border: 2px solid var(--ink); border-radius: 14px;
  padding: 8px 12px; font-size: 1.5rem;
}
.buybox h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); margin: 10px 0 6px; }
.rating { font-weight: 700; color: var(--ink-soft); }
.price { font: 700 2.6rem "Fredoka", sans-serif; margin: 18px 0 2px; }
.price s { font-size: 1.4rem; color: var(--ink-soft); margin-left: 10px; }
.price-note { color: var(--bubblegum); font-weight: 800; margin: 0 0 22px; }

.opt-label { font-weight: 800; margin: 22px 0 10px; display: block; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  border: 2.5px solid var(--ink); background: #fff; border-radius: 999px;
  padding: 9px 16px; font: 700 0.98rem "Nunito", sans-serif; cursor: pointer; color: var(--ink);
}
.chip[aria-pressed="true"] { background: var(--fizz); color: #fff; }
.opt-desc { color: var(--ink-soft); min-height: 1.5em; margin: 10px 0 0; font-style: italic; }

.qty { display: inline-flex; align-items: center; border: 2.5px solid var(--ink); border-radius: 999px; background: #fff; }
.qty button { background: none; border: 0; font: 700 1.3rem "Fredoka"; width: 44px; height: 44px; cursor: pointer; color: var(--ink); }
.qty output { min-width: 34px; text-align: center; font-weight: 800; }

.buy-row { display: flex; gap: 14px; align-items: center; margin-top: 28px; flex-wrap: wrap; position: relative; min-height: 70px; }
#buyBtn { position: relative; transition: transform 0.25s cubic-bezier(.34,1.56,.64,1); }

.perks { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 10px; }
.perks li { background: #fff; border: 2px solid var(--ink); border-radius: 16px; padding: 12px 16px; font-weight: 600; }

.specs { width: 100%; border-collapse: collapse; background: #fff; border: 3px solid var(--ink); border-radius: 20px; overflow: hidden; }
.specs th, .specs td { text-align: left; padding: 14px 18px; border-bottom: 2px dashed rgba(29,35,64,0.15); vertical-align: top; }
.specs th { width: 38%; font-family: "Fredoka", sans-serif; }
.specs tr:last-child th, .specs tr:last-child td { border-bottom: 0; }

/* modal */
.modal-bg {
  position: fixed; inset: 0; background: rgba(29,35,64,0.55); z-index: 50;
  display: none; place-items: center; padding: 16px;
}
.modal-bg.show { display: grid; }
.modal {
  background: var(--cream); border: 3px solid var(--ink); border-radius: 32px;
  max-width: 460px; width: 100%; padding: 34px 28px; text-align: center;
  box-shadow: 10px 10px 0 var(--bubblegum);
  animation: pop 0.35s cubic-bezier(.34,1.56,.64,1);
}
@keyframes pop { from { transform: scale(0.6) rotate(-6deg); opacity: 0; } }
.modal .big { font-size: 4rem; display: block; }
.modal h2 { margin: 6px 0 10px; font-size: 2rem; }
.modal p { color: var(--ink-soft); }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(140%);
  background: var(--ink); color: #fff; padding: 14px 22px; border-radius: 999px;
  font-weight: 700; z-index: 60; transition: transform 0.3s; max-width: calc(100% - 32px); text-align: center;
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero, .shop, .band { grid-template-columns: 1fr; }
  .benefits, .reviews { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .gallery { position: static; }
  .band { padding: 40px 22px; border-radius: 28px; margin: 0 16px; }
  .hero { padding-top: 10px; }
}
@media (max-width: 560px) {
  .nav-links a:not(.btn) { display: none; }
  .steps { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  section { padding: 64px 16px; }
  .sticker { width: 96px; height: 96px; font-size: 0.85rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .bubbles { display: none; }
}

.shop > *, .hero > *, .band > * { min-width: 0; }