:root {
  --ink: #07111f;
  --ink-2: #0d1d30;
  --paper: #f5f7f7;
  --white: #fff;
  --muted: #5d6876;
  --line: #dce2e3;
  --lime: #c7ff42;
  --cyan: #66e7ff;
  --max: 1180px;
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; }
.shell { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.skip-link {
  position: fixed; z-index: 100; left: 16px; top: -80px;
  padding: 10px 16px; background: var(--lime); color: var(--ink);
}
.skip-link:focus { top: 12px; }
.site-header {
  position: absolute; z-index: 10; inset: 0 0 auto; color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.16);
}
.nav-wrap { height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; font-weight: 600; letter-spacing: -.03em; }
.brand b { color: var(--lime); }
.brand-mark {
  display: grid; place-items: center; width: 36px; aspect-ratio: 1;
  background: var(--lime); color: var(--ink); border-radius: 50%;
  font: 800 15px/1 "Arial Narrow", Arial, sans-serif; letter-spacing: -.05em;
}
nav { display: flex; align-items: center; gap: 28px; }
nav a { text-decoration: none; font-size: .87rem; font-weight: 600; }
nav a:hover { color: var(--lime); }
.nav-cta { border: 1px solid rgba(255,255,255,.45); border-radius: 999px; padding: 10px 16px; }

.hero {
  min-height: 760px; position: relative; overflow: hidden; display: grid;
  color: #fff; isolation: isolate;
}
.hero-media, .hero-shade { position: absolute; inset: 0; }
.hero-media {
  z-index: -2; background: url("assets/badminton-hero-ki.webp") center/cover no-repeat;
  transform: scale(1.015);
}
.hero-shade {
  z-index: -1;
  background: linear-gradient(90deg, rgba(3,11,21,.95) 0%, rgba(3,11,21,.82) 39%, rgba(3,11,21,.19) 70%, rgba(3,11,21,.08) 100%),
              linear-gradient(0deg, rgba(3,11,21,.58), transparent 45%);
}
.hero-inner { align-self: center; padding-top: 98px; }
.hero-inner > * { max-width: 675px; }
.eyebrow {
  margin: 0 0 16px; color: var(--lime); text-transform: uppercase;
  font: 800 .78rem/1.3 "Arial Narrow", Arial, sans-serif; letter-spacing: .17em;
}
.eyebrow.dark { color: #527000; }
h1, h2, h3 { margin-top: 0; line-height: 1.08; letter-spacing: -.045em; }
h1 { margin-bottom: 22px; font-size: clamp(3.2rem, 7vw, 6.2rem); max-width: 820px !important; text-wrap: balance; }
h2 { margin-bottom: 16px; font-size: clamp(2.2rem, 4vw, 3.8rem); text-wrap: balance; }
h3 { font-size: 1.35rem; }
.hero-copy { margin: 0; color: #d6e0e7; font-size: 1.08rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 52px; padding: 0 22px; border-radius: 999px; text-decoration: none;
  font-size: .9rem; font-weight: 800; transition: transform .2s, background .2s;
}
.button:hover { transform: translateY(-2px); }
.button.primary { color: var(--ink); background: var(--lime); }
.button.primary:hover { background: #d7ff77; }
.button.ghost { border: 1px solid rgba(255,255,255,.42); color: #fff; }
.button.ghost:hover { background: rgba(255,255,255,.09); }
.ai-label {
  display: block; width: max-content; margin-top: 46px; padding: 6px 10px;
  color: #ccd5dc; background: rgba(3,11,21,.6); border: 1px solid rgba(255,255,255,.16);
  border-radius: 5px; font-size: .68rem; letter-spacing: .04em;
}

.finder-band { background: var(--lime); }
.finder-grid { display: grid; grid-template-columns: .78fr 1.22fr; align-items: center; gap: 54px; padding-block: 46px; }
.finder-grid h2 { margin: 0 0 7px; font-size: clamp(1.8rem, 3vw, 2.6rem); }
.finder-grid p { margin: 0; }
.search-form label { display: block; margin-bottom: 8px; font-weight: 800; font-size: .82rem; }
.search-row { display: grid; grid-template-columns: 1fr auto; padding: 6px; background: #fff; border-radius: 14px; box-shadow: 0 12px 30px rgba(7,17,31,.12); }
.search-row input, .search-row button { min-height: 54px; border: 0; font: inherit; }
.search-row input { width: 100%; padding: 0 17px; background: transparent; outline: 0; }
.search-row button {
  padding: 0 20px; color: #fff; background: var(--ink); border-radius: 10px;
  font-size: .85rem; font-weight: 800; cursor: pointer;
}
.search-row button:hover { background: #193048; }

.section { padding-block: 112px; }
.section-head { display: grid; grid-template-columns: 1.15fr .65fr; align-items: end; gap: 70px; margin-bottom: 48px; }
.section-head h2 { margin-bottom: 0; }
.section-head > p { margin: 0; color: var(--muted); }
.criteria-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; }
.criterion { min-height: 300px; padding: 30px; border-right: 1px solid var(--line); }
.criterion:last-child { border-right: 0; }
.criterion .number { color: #91a0aa; font: 800 .8rem "Arial Narrow", Arial, sans-serif; }
.criterion h3 { margin: 70px 0 12px; }
.criterion p { margin: 0; color: var(--muted); font-size: .92rem; }
.rule-note {
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 28px;
  margin-top: 24px; padding: 28px; background: #e8eff0; border-radius: var(--radius);
}
.rule-note .rule-icon {
  display: grid; place-items: center; width: 82px; aspect-ratio: 1;
  border: 2px solid var(--ink); border-radius: 50%; font: 800 1.35rem "Arial Narrow", Arial, sans-serif;
}
.rule-note h3, .rule-note p { margin-bottom: 6px; }
.rule-note p:last-child { margin: 0; color: var(--muted); font-size: .9rem; }
.rule-note > a { font-size: .84rem; font-weight: 800; text-decoration-thickness: 1px; text-underline-offset: 4px; }

.section-dark { background: var(--ink); color: #fff; }
.section-head.inverse > p { color: #aebbc6; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.product-card {
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 18px;
  min-height: 122px; padding: 22px; color: #fff; background: var(--ink-2);
  border: 1px solid rgba(255,255,255,.1); border-radius: 16px; text-decoration: none;
  transition: transform .2s, border-color .2s, background .2s;
}
.product-card:hover { transform: translateY(-3px); border-color: var(--lime); background: #132940; }
.product-card.featured { background: var(--lime); color: var(--ink); border-color: var(--lime); }
.product-icon {
  display: grid; place-items: center; width: 50px; aspect-ratio: 1;
  background: rgba(255,255,255,.09); border-radius: 12px;
  font: 800 1.1rem "Arial Narrow", Arial, sans-serif;
}
.featured .product-icon { background: rgba(7,17,31,.1); }
.product-card strong, .product-card small { display: block; }
.product-card strong { margin-bottom: 3px; }
.product-card small { opacity: .67; }
.affiliate-note { margin: 22px 0 0; color: #8fa0ae; font-size: .76rem; }

.check-layout { display: grid; grid-template-columns: 1fr .58fr; gap: 22px; align-items: stretch; }
.check-list { list-style: none; margin: 0; padding: 0; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.check-list li { display: grid; grid-template-columns: 52px 1fr; gap: 18px; padding: 24px 28px; border-bottom: 1px solid var(--line); }
.check-list li:last-child { border-bottom: 0; }
.check-list li > span { color: #769300; font: 800 .85rem "Arial Narrow", Arial, sans-serif; }
.check-list strong { display: block; margin-bottom: 4px; }
.check-list p { margin: 0; color: var(--muted); font-size: .9rem; }
.care-card { display: flex; flex-direction: column; justify-content: flex-end; padding: 36px; color: #fff; background: #12304a; border-radius: var(--radius); }
.care-card h3 { font-size: 2rem; }
.care-card p:not(.eyebrow) { margin: 0; color: #c4d1da; }
.care-card a { margin-top: 34px; color: var(--lime); font-weight: 800; text-underline-offset: 4px; }

.mv-band { padding-block: 62px; color: #fff; background: #102238; }
.mv-grid { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 30px; }
.mv-monogram {
  display: grid; place-items: center; width: 90px; aspect-ratio: 1;
  border: 1px solid rgba(255,255,255,.25); border-radius: 50%;
  color: var(--lime); font: 800 1.6rem "Arial Narrow", Arial, sans-serif;
}
.mv-grid h2 { margin-bottom: 9px; font-size: clamp(2rem, 4vw, 3rem); }
.mv-grid p:not(.eyebrow) { margin: 0; color: #b7c3cc; }

.faq { padding-bottom: 120px; }
.faq .section-head { grid-template-columns: 1fr; }
.faq-list { border-top: 1px solid #bac4c8; }
details { border-bottom: 1px solid #bac4c8; }
summary {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 24px 0; cursor: pointer; list-style: none; font-weight: 800;
}
summary::-webkit-details-marker { display: none; }
summary span { color: #6c8700; font-size: 1.5rem; font-weight: 400; transition: transform .2s; }
details[open] summary span { transform: rotate(45deg); }
details p { max-width: 780px; margin: -6px 0 25px; color: var(--muted); }

footer { color: #d5dde3; background: #050c15; }
.footer-top { display: grid; grid-template-columns: 1fr 1.5fr; gap: 70px; padding-block: 62px; }
.footer-brand { color: #fff; }
.footer-top > div > p { max-width: 330px; color: #82919e; font-size: .85rem; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-links strong, .footer-links a { display: block; }
.footer-links strong { margin-bottom: 14px; color: #fff; font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; }
.footer-links a { width: fit-content; margin: 8px 0; color: #82919e; font-size: .83rem; text-decoration: none; }
.footer-links a:hover { color: var(--lime); }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 20px; padding-block: 18px;
  border-top: 1px solid rgba(255,255,255,.09); color: #62717e; font-size: .74rem;
}

@media (max-width: 920px) {
  nav a:not(.nav-cta) { display: none; }
  .finder-grid, .section-head, .check-layout, .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .criteria-grid { grid-template-columns: repeat(2, 1fr); }
  .criterion:nth-child(2) { border-right: 0; }
  .criterion:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .rule-note { grid-template-columns: auto 1fr; }
  .rule-note > a { grid-column: 2; }
  .mv-grid { grid-template-columns: auto 1fr; }
  .mv-grid .button { grid-column: 2; justify-self: start; }
}

@media (max-width: 620px) {
  .shell { width: min(calc(100% - 28px), var(--max)); }
  .site-header { position: absolute; }
  .nav-wrap { height: 70px; }
  nav .nav-cta { padding: 8px 12px; font-size: .75rem; }
  .brand { font-size: .88rem; }
  .hero { min-height: 700px; }
  .hero-media { background-position: 62% center; }
  .hero-shade { background: linear-gradient(90deg, rgba(3,11,21,.94), rgba(3,11,21,.57)), linear-gradient(0deg, rgba(3,11,21,.72), transparent); }
  .hero-inner { padding-top: 84px; }
  h1 { font-size: clamp(2.8rem, 14vw, 4.2rem); }
  .hero-copy { font-size: .96rem; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .finder-grid { padding-block: 38px; }
  .search-row { grid-template-columns: 1fr; gap: 6px; }
  .section { padding-block: 78px; }
  .criteria-grid, .product-grid { grid-template-columns: 1fr; }
  .criterion { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .criterion:nth-child(3) { border-bottom: 1px solid var(--line); }
  .criterion:last-child { border-bottom: 0; }
  .criterion h3 { margin-top: 35px; }
  .rule-note { grid-template-columns: 1fr; }
  .rule-note > a { grid-column: 1; }
  .mv-grid { grid-template-columns: 1fr; }
  .mv-grid .button { grid-column: 1; }
  .mv-monogram { width: 70px; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; }
}

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