:root {
  --bg: #080b1d;
  --panel: #111735;
  --panel-soft: #171f44;
  --text: #f6f7ff;
  --muted: #b9c1dd;
  --line: rgba(255, 255, 255, 0.13);
  --accent: #9d86ff;
  --accent-strong: #c9b8ff;
  --teal: #77e5df;
  --gold: #ffd67a;
  --danger: #ffb1b1;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(157, 134, 255, 0.32), transparent 28rem),
    radial-gradient(circle at 90% 12%, rgba(119, 229, 223, 0.14), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  background: rgba(8, 11, 29, 0.86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background:
    radial-gradient(circle at 65% 35%, var(--bg) 0 0.42rem, transparent 0.45rem),
    linear-gradient(135deg, var(--gold), var(--accent));
  box-shadow: 0 0 24px rgba(201, 184, 255, 0.28);
}

.nav-toggle {
  display: inline-grid;
  gap: 0.25rem;
  width: 2.6rem;
  height: 2.6rem;
  place-content: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  color: var(--text);
  cursor: pointer;
}

.nav-toggle span:not(.sr-only) {
  width: 1.15rem;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
}

.site-nav {
  position: fixed;
  inset: 4.5rem 1rem auto;
  display: none;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.75rem;
  background: #101634;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  box-shadow: var(--shadow);
}

.site-nav.is-open {
  display: flex;
}

.nav-checkbox:checked ~ .site-nav {
  display: flex;
}

.site-nav a {
  padding: 0.75rem;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0.45rem;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
}

.site-nav .nav-cta {
  color: #08101e;
  background: var(--teal);
}

.section {
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: 4rem 1rem;
}

.hero {
  display: grid;
  gap: 2rem;
  min-height: calc(100svh - 4.5rem);
  align-items: center;
  padding-top: 3rem;
}

.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--teal);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
}

h1 {
  max-width: 12ch;
  font-size: clamp(2.7rem, 14vw, 4.8rem);
  letter-spacing: 0;
}

h2 {
  font-size: clamp(2rem, 8vw, 3.35rem);
  letter-spacing: 0;
}

h3 {
  font-size: 1.08rem;
}

.hero-subtitle,
.section-heading p,
.product-copy p,
.product-panel p,
.final-cta p,
.site-footer p {
  color: var(--muted);
}

.hero-subtitle {
  max-width: 42rem;
  margin: 1.1rem 0 0;
  font-size: 1.08rem;
}

.hero-actions {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  padding: 0.85rem 1rem;
  border: 1px solid transparent;
  border-radius: 0.5rem;
  font-weight: 800;
  text-align: center;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button.primary {
  color: #07101e;
  background: linear-gradient(135deg, var(--teal), var(--accent-strong));
  box-shadow: 0 16px 34px rgba(119, 229, 223, 0.18);
}

.mini-disclosure {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.hero-media {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 54%, rgba(8, 11, 29, 0.34));
  pointer-events: none;
}

.hero-media img,
.image-strip img,
.visual-grid img {
  display: block;
  width: 100%;
  height: auto;
}

.panel-kicker {
  display: block;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.section-heading {
  max-width: 45rem;
  margin-bottom: 1.8rem;
}

.problem-grid,
.ingredient-grid,
.visual-grid {
  display: grid;
  gap: 0.9rem;
}

.problem-grid article,
.ingredient-grid article,
.product-panel,
.tip-row,
.faq-item,
.audience-column {
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
}

.problem-grid article {
  padding: 1rem;
}

.problem-grid span {
  display: inline-block;
  margin-bottom: 1rem;
  color: var(--gold);
  font-weight: 800;
}

.problem-grid p,
.tip-row p,
.faq-answer p {
  margin-bottom: 0;
  color: var(--muted);
}

.image-strip {
  display: grid;
  gap: 0.9rem;
  margin-top: 1rem;
}

.image-strip figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--panel);
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.2);
}

.image-strip img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.visual-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.visual-grid figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--panel);
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.2);
}

.visual-grid img {
  aspect-ratio: 4 / 5;
  height: 100%;
  object-fit: cover;
}

.tips-list {
  display: grid;
  gap: 0.8rem;
}

.tip-row {
  display: grid;
  grid-template-columns: 2.3rem 1fr;
  gap: 0.85rem;
  padding: 1rem;
}

.tip-row > span {
  display: grid;
  width: 2.3rem;
  height: 2.3rem;
  place-items: center;
  color: #08101e;
  font-weight: 900;
  background: var(--teal);
  border-radius: 50%;
}

.product {
  display: grid;
  gap: 1rem;
}

.product-copy {
  padding: 1.35rem;
  background: linear-gradient(135deg, rgba(157, 134, 255, 0.2), rgba(119, 229, 223, 0.08));
  border: 1px solid var(--line);
  border-radius: 0.5rem;
}

.product-copy .button {
  width: 100%;
  margin-top: 0.8rem;
}

.product-panel {
  padding: 1.35rem;
}

.ingredient-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ingredient-grid article {
  min-height: 5.2rem;
  display: grid;
  place-items: center;
  padding: 1rem;
  color: var(--text);
  font-weight: 800;
  text-align: center;
}

.audience {
  display: grid;
  gap: 1rem;
}

.audience-column {
  padding: 1.15rem;
}

.caution {
  border-color: rgba(255, 177, 177, 0.32);
}

.check-list {
  display: grid;
  gap: 0.7rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 1.7rem;
  color: var(--muted);
}

.check-list li::before {
  content: "";
  position: absolute;
  top: 0.42rem;
  left: 0;
  width: 0.75rem;
  height: 0.75rem;
  border: 2px solid var(--teal);
  border-radius: 50%;
}

.check-list.warning li::before {
  border-color: var(--danger);
}

.faq-list {
  display: grid;
  gap: 0.8rem;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1rem;
  color: var(--text);
  background: transparent;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
  list-style: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question span {
  display: grid;
  flex: 0 0 1.7rem;
  width: 1.7rem;
  height: 1.7rem;
  place-items: center;
  color: #08101e;
  background: var(--teal);
  border-radius: 50%;
}

.faq-answer > p {
  margin-top: 0;
  padding: 0 1rem;
  overflow: hidden;
}

.faq-item[open] .faq-answer > p {
  padding-bottom: 1rem;
}

.faq-item[open] .faq-question span {
  font-size: 0;
}

.faq-item[open] .faq-question span::before {
  content: "-";
  font-size: 1rem;
}

.final-cta {
  width: min(calc(100% - 2rem), 840px);
  margin-bottom: 2rem;
  text-align: center;
  background:
    linear-gradient(135deg, rgba(119, 229, 223, 0.16), rgba(157, 134, 255, 0.24)),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
}

.final-cta .button {
  width: 100%;
  margin-top: 0.8rem;
}

.site-footer {
  padding: 2rem 1rem;
  background: #050715;
  border-top: 1px solid var(--line);
}

.site-footer p {
  width: min(100%, 960px);
  margin: 0 auto 0.75rem;
  font-size: 0.88rem;
}

.site-footer p:last-child {
  margin-bottom: 0;
}

@media (min-width: 640px) {
  .problem-grid,
  .ingredient-grid,
  .image-strip,
  .visual-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .final-cta .button,
  .product-copy .button {
    width: auto;
  }
}

@media (min-width: 860px) {
  .site-header {
    padding: 0.9rem 2rem;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
  }

  .site-nav a {
    padding: 0.65rem 0.8rem;
  }

  .site-nav .nav-cta {
    padding-inline: 1rem;
  }

  .section {
    padding: 5.5rem 1.5rem;
  }

  .hero {
    grid-template-columns: 1.05fr 0.95fr;
  }

  h1 {
    max-width: 13ch;
    font-size: clamp(4.4rem, 7vw, 6.5rem);
  }

  .problem-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .image-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .visual-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .product,
  .audience {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: stretch;
  }

  .product-copy,
  .product-panel,
  .audience-column {
    padding: 1.7rem;
  }

  .ingredient-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}