/* =========================================================
   KOOL STAR — Clothing & Footwear
   Brand colors: Deep Black #0B0B0B · Charcoal #2E2E2E
                 Mint Green #00C896 · Off White #F5F5F5
   ========================================================= */
:root {
  --black: #0B0B0B;
  --charcoal: #2E2E2E;
  --mint: #00C896;
  --mint-dark: #00A67D;
  --off: #F5F5F5;
  --white: #FFFFFF;
  --gray: #8A8A8A;
  --line: rgba(11, 11, 11, .1);
  --radius: 18px;
  --font: "Montserrat", "Noto Sans SC", system-ui, sans-serif;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { font-family: var(--font); background: var(--off); color: var(--black); line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
html[lang="zh"] body { font-family: "Noto Sans SC", "Montserrat", system-ui, sans-serif; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }

.container { width: min(1200px, 100% - 40px); margin-inline: auto; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 15px 28px; border-radius: 999px; font-weight: 600; font-size: .92rem; letter-spacing: .04em; border: 1.5px solid transparent; cursor: pointer; transition: .25s ease; }
.btn--mint { background: var(--mint); color: var(--black); }
.btn--mint:hover { background: var(--white); transform: translateY(-2px); }
.btn--ghost { border-color: rgba(255, 255, 255, .3); color: var(--white); }
.btn--ghost:hover { border-color: var(--mint); color: var(--mint); }
.btn--dark { background: var(--black); color: var(--white); margin-top: 28px; }
.btn--dark:hover { background: var(--mint); color: var(--black); }
.btn--block { width: 100%; }

.eyebrow { font-size: .75rem; font-weight: 600; letter-spacing: .3em; text-transform: uppercase; color: var(--gray); margin-bottom: 12px; }
.eyebrow--mint { color: var(--mint); }
html[lang="zh"] .eyebrow { letter-spacing: .15em; }

/* ---------- Header ---------- */
.header { position: fixed; inset: 0 0 auto; z-index: 100; background: rgba(11, 11, 11, .82); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid rgba(255, 255, 255, .06); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--white); }
.brand__mark { height: 30px; width: auto; }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__text strong { font-size: 1.05rem; font-weight: 800; letter-spacing: .08em; }
.brand__text small { font-size: .58rem; letter-spacing: .32em; text-transform: uppercase; color: rgba(255, 255, 255, .6); }
.nav { display: flex; gap: 34px; }
.nav a { color: rgba(255, 255, 255, .75); font-size: .88rem; font-weight: 500; position: relative; transition: color .2s; }
.nav a::after { content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px; background: var(--mint); transition: width .25s; }
.nav a:hover { color: var(--white); }
.nav a:hover::after { width: 100%; }
.header__actions { display: flex; align-items: center; gap: 12px; }
.lang { display: flex; background: rgba(255, 255, 255, .08); border-radius: 999px; padding: 4px; }
.lang button { background: none; border: 0; color: rgba(255, 255, 255, .7); padding: 6px 14px; border-radius: 999px; font-size: .8rem; font-weight: 600; cursor: pointer; transition: .2s; }
.lang button.is-active { background: var(--mint); color: var(--black); }
.burger { display: none; width: 42px; height: 42px; border: 0; background: rgba(255, 255, 255, .08); border-radius: 50%; cursor: pointer; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.burger span { width: 18px; height: 2px; background: var(--white); transition: .25s; }
.burger[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { background: var(--black); color: var(--white); padding: 140px 0 90px; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; width: 640px; height: 640px; right: -180px; top: -160px; background: radial-gradient(circle, rgba(0, 200, 150, .22), transparent 65%); pointer-events: none; }
.hero__grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 60px; align-items: center; position: relative; }
.hero__title { font-size: clamp(2.8rem, 6vw, 5.2rem); line-height: 1; font-weight: 800; letter-spacing: -.02em; margin-bottom: 24px; }
.accent { color: var(--mint); }
.hero__lead { color: rgba(255, 255, 255, .7); font-size: 1.05rem; max-width: 480px; margin-bottom: 36px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__stats { list-style: none; display: flex; gap: 40px; margin-top: 56px; padding-top: 28px; border-top: 1px solid rgba(255, 255, 255, .1); }
.hero__stats strong { display: block; font-size: 1.7rem; font-weight: 800; }
.hero__stats span { font-size: .78rem; color: rgba(255, 255, 255, .55); }
.hero__media { position: relative; height: 520px; }
.hero__img { position: absolute; overflow: hidden; border-radius: var(--radius); box-shadow: var(--shadow); }
.hero__img img { width: 100%; height: 100%; object-fit: cover; }
.hero__img--main { inset: 0 0 90px 60px; }
.hero__img--side { left: 0; bottom: 0; width: 58%; height: 180px; border: 6px solid var(--black); }
.hero__badge { position: absolute; right: -10px; bottom: 50px; background: var(--mint); color: var(--black); border-radius: 999px; padding: 12px 22px 12px 14px; display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: .85rem; box-shadow: var(--shadow); animation: float 4s ease-in-out infinite; }
.hero__badge img { height: 22px; }
@keyframes float { 50% { transform: translateY(-10px); } }

/* ---------- Marquee ---------- */
.marquee { background: var(--mint); overflow: hidden; padding: 16px 0; }
.marquee__track { display: flex; gap: 32px; width: max-content; animation: scroll 30s linear infinite; font-weight: 800; letter-spacing: .15em; font-size: .95rem; }
.marquee__track i { font-style: normal; }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ---------- Sections ---------- */
.section { padding: 110px 0; }
.section--alt { background: var(--white); }
.section--dark { background: var(--black); color: var(--white); }
.section__head { margin-bottom: 52px; }
.section__head h2, .about h2, .contact h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; letter-spacing: -.02em; line-height: 1.1; }
.section__head--row { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; }

/* ---------- Categories ---------- */
.cats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cat { position: relative; height: 440px; border-radius: var(--radius); overflow: hidden; background: var(--charcoal) url("../assets/img/logo-mark-white.png") center / 40% no-repeat; color: var(--white); }
.cat img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s ease; }
.cat::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(11, 11, 11, .92) 5%, rgba(11, 11, 11, .1) 60%); }
.cat:hover img { transform: scale(1.07); }
.cat__body { position: absolute; z-index: 1; left: 24px; right: 24px; bottom: 24px; }
.cat__num { font-size: .75rem; font-weight: 700; color: var(--mint); letter-spacing: .2em; }
.cat h3 { font-size: 1.6rem; font-weight: 800; margin: 4px 0 6px; }
.cat p { font-size: .85rem; color: rgba(255, 255, 255, .7); }

/* ---------- Products ---------- */
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.filters button { border: 1.5px solid var(--line); background: none; padding: 10px 20px; border-radius: 999px; font-size: .85rem; font-weight: 600; cursor: pointer; transition: .2s; }
.filters button:hover { border-color: var(--black); }
.filters button.is-active { background: var(--black); border-color: var(--black); color: var(--white); }
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card { background: var(--off); border-radius: var(--radius); overflow: hidden; transition: transform .3s, box-shadow .3s; animation: fade .45s ease both; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
@keyframes fade { from { opacity: 0; transform: translateY(14px); } }
.card__img { position: relative; aspect-ratio: 4 / 5; overflow: hidden; background: linear-gradient(135deg, var(--charcoal), var(--black)); }
.card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.card:hover .card__img img { transform: scale(1.06); }
.card__img.is-fallback img { object-fit: contain; width: 45%; height: auto; margin: auto; position: absolute; inset: 0; opacity: .9; }
.card__tag { position: absolute; top: 14px; left: 14px; background: var(--mint); color: var(--black); font-size: .68rem; font-weight: 700; padding: 5px 11px; border-radius: 999px; letter-spacing: .06em; text-transform: uppercase; }
.card__body { padding: 18px 20px 22px; }
.card__cat { font-size: .7rem; letter-spacing: .2em; text-transform: uppercase; color: var(--gray); font-weight: 600; }
.card__name { font-size: 1rem; font-weight: 700; margin: 4px 0 14px; }
.card__foot { display: flex; justify-content: space-between; align-items: center; }
.card__sku { font-size: .75rem; color: var(--gray); font-family: ui-monospace, monospace; }
.card__btn { font-size: .78rem; font-weight: 700; color: var(--mint-dark); }
.card__btn:hover { color: var(--black); }
.note { margin-top: 40px; text-align: center; font-size: .88rem; color: var(--gray); }

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about__media { position: relative; height: 520px; }
.about__media img { position: absolute; object-fit: cover; border-radius: var(--radius); box-shadow: var(--shadow); }
.about__a { width: 72%; height: 80%; left: 0; top: 0; }
.about__b { width: 55%; height: 52%; right: 0; bottom: 0; border: 8px solid var(--off); }
.about__copy h2 { margin-bottom: 22px; }
.about__copy > p:not(.eyebrow) { color: #555; margin-bottom: 16px; }
.values { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 36px; }
.value { display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center; padding: 22px 8px; background: var(--white); border-radius: 14px; font-size: .82rem; transition: .25s; }
.value svg { width: 28px; height: 28px; color: var(--mint-dark); }
.value:hover { background: var(--black); color: var(--white); }
.value:hover svg { color: var(--mint); }

/* ---------- Services ---------- */
.services { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(255, 255, 255, .1); border-radius: var(--radius); overflow: hidden; }
.svc { background: var(--black); padding: 40px 30px; transition: background .3s; }
.svc:hover { background: var(--charcoal); }
.svc span { font-size: .8rem; color: var(--mint); font-weight: 700; letter-spacing: .2em; }
.svc h3 { font-size: 1.25rem; margin: 18px 0 10px; }
.svc p { color: rgba(255, 255, 255, .6); font-size: .9rem; }

/* ---------- Contact ---------- */
.contact { display: grid; grid-template-columns: 1fr 1.1fr; gap: 70px; align-items: start; }
.contact__company { font-weight: 800; letter-spacing: .08em; margin: 18px 0 30px; font-size: 1.05rem; }
.info { display: flex; gap: 16px; padding: 20px 0; border-top: 1px solid var(--line); }
.info svg { color: var(--mint-dark); margin-top: 2px; }
.info span { font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--gray); font-weight: 600; }
.info p { font-weight: 500; }
.info a:hover { color: var(--mint-dark); }
.zh-only { display: none; margin-top: 6px; color: #555; font-size: .92rem; }
html[lang="zh"] .zh-only { display: block; }
.form { background: var(--white); padding: 44px; border-radius: 24px; box-shadow: 0 30px 70px -40px rgba(0, 0, 0, .3); display: flex; flex-direction: column; gap: 18px; }
.form h3 { font-size: 1.5rem; font-weight: 800; margin-bottom: 4px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form label { display: flex; flex-direction: column; gap: 7px; font-size: .8rem; font-weight: 600; }
.form input, .form select, .form textarea { border: 1.5px solid var(--line); background: var(--off); padding: 13px 15px; border-radius: 12px; outline: none; transition: .2s; resize: vertical; width: 100%; }
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--mint); background: var(--white); }
.form .is-invalid { border-color: #E5484D; }
.form__ok { background: rgba(0, 200, 150, .12); color: var(--mint-dark); padding: 14px; border-radius: 12px; text-align: center; font-weight: 600; font-size: .9rem; }

/* ---------- Footer ---------- */
.footer { background: var(--black); color: rgba(255, 255, 255, .6); padding: 50px 0; border-top: 1px solid rgba(255, 255, 255, .08); }
.footer__inner { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; font-size: .85rem; }
.footer__brand { display: flex; align-items: center; gap: 12px; color: var(--white); }
.footer__brand img { height: 34px; }
.footer__brand strong { display: block; letter-spacing: .08em; font-weight: 800; line-height: 1.1; }
.footer__brand small { font-size: .58rem; letter-spacing: .3em; text-transform: uppercase; color: rgba(255, 255, 255, .55); }
.footer__tag { color: var(--mint); font-weight: 700; letter-spacing: .2em; text-transform: uppercase; font-size: .78rem; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .8s ease, transform .8s ease; }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .cats, .grid { grid-template-columns: repeat(2, 1fr); }
  .services { grid-template-columns: repeat(2, 1fr); }
  .hero__grid, .about, .contact { grid-template-columns: 1fr; gap: 56px; }
  .hero__media { height: 440px; }
}
@media (max-width: 820px) {
  .burger { display: flex; }
  .nav { position: fixed; top: 72px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--black); padding: 8px 20px 20px; transform: translateY(-120%); transition: transform .35s ease; border-bottom: 1px solid rgba(255, 255, 255, .08); z-index: -1; }
  .nav.is-open { transform: none; }
  .nav a { padding: 16px 0; border-bottom: 1px solid rgba(255, 255, 255, .06); font-size: 1rem; }
  .nav a::after { display: none; }
}
@media (max-width: 600px) {
  .section { padding: 80px 0; }
  .hero { padding: 120px 0 70px; }
  .hero__stats { gap: 24px; }
  .hero__media { height: 340px; }
  .hero__img--main { inset: 0 0 70px 30px; }
  .hero__img--side { height: 130px; width: 62%; }
  .hero__badge { right: 0; bottom: 30px; }
  .cats { grid-template-columns: 1fr; }
  .cat { height: 300px; }
  .grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .card__body { padding: 14px; }
  .card__name { font-size: .9rem; }
  .card__foot { flex-direction: column; align-items: flex-start; gap: 6px; }
  .services { grid-template-columns: 1fr; }
  .about__media { height: 380px; }
  .values { grid-template-columns: repeat(2, 1fr); }
  .form { padding: 28px 22px; }
  .form__row { grid-template-columns: 1fr; }
  .brand__text small { display: none; }
  .lang button { padding: 6px 10px; }
  .footer__inner { flex-direction: column; text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}