/* Isolated visual system for the kefiran science gateway. */
.ktw-kefiran {
  --kefiran-ink: #231f20;
  --kefiran-teal: #02838d;
  --kefiran-teal-dark: #17656d;
  --kefiran-pale: #deedf0;
  --kefiran-sand: #fbf5ed;
  --kefiran-paper: #fff;
  --kefiran-line: #d6d6d6;
  --kefiran-muted: #5c595a;
  --kefiran-gold: #e9be38;
  --kefiran-coral: #d86f4f;
  color: var(--kefiran-ink);
  background: var(--kefiran-paper);
}
.ktw-kefiran *, .ktw-kefiran *::before, .ktw-kefiran *::after { box-sizing: border-box; }
.ktw-kefiran ::selection { background: var(--kefiran-gold); color: var(--kefiran-ink); }
.ktw-kefiran :where(a,button,summary):focus-visible { outline: 3px solid var(--kefiran-gold); outline-offset: 4px; }
.ktw-kefiran [hidden] { display: none !important; }

.ktw-kefiran-hero { position: relative; overflow: hidden; background: var(--kefiran-pale); }
.ktw-kefiran-hero::before { position: absolute; top: -220px; right: -110px; width: 620px; height: 620px; border: 2px dotted rgba(35,31,32,.25); border-radius: 50%; content: ""; }
.ktw-kefiran-hero__grid { position: relative; z-index: 1; display: grid; min-height: 650px; padding-block: 72px; align-items: center; grid-template-columns: minmax(0,1.04fr) minmax(390px,.76fr); gap: 80px; }
.ktw-kefiran-hero h1 { max-width: 790px; margin: 0 0 26px; font-size: clamp(48px,6.2vw,82px); line-height: .95; letter-spacing: -.04em; }
.ktw-zh .ktw-kefiran-hero h1 { font-size: clamp(43px,5.2vw,70px); line-height: 1.08; }
.ktw-kefiran-hero__grid > div:first-child > p { max-width: 760px; margin: 0; color: #393536; font-size: clamp(19px,1.8vw,23px); line-height: 1.56; }
.ktw-kefiran-hero nav { display: flex; margin-top: 30px; flex-wrap: wrap; gap: 10px; }
.ktw-kefiran-hero nav a { display: inline-flex; min-height: 48px; padding: 10px 17px; border: 2px solid var(--kefiran-ink); border-radius: 999px; align-items: center; color: var(--kefiran-ink); font-weight: 800; text-decoration: none; }
.ktw-kefiran-hero nav a:first-child, .ktw-kefiran-hero nav a:hover { background: var(--kefiran-ink); color: #fff; }
.ktw-kefiran-hero__visual { position: relative; min-height: 470px; }
.ktw-kefiran-grain { position: absolute; top: 74px; left: 16px; width: 245px; height: 245px; filter: drop-shadow(0 22px 26px rgba(35,31,32,.14)); }
.ktw-kefiran-grain i { position: absolute; border: 2px solid rgba(35,31,32,.18); background: #fff9dc; }
.ktw-kefiran-grain i:nth-child(1) { inset: 24px 55px 58px 22px; border-radius: 58% 42% 51% 49%; }
.ktw-kefiran-grain i:nth-child(2) { top: 14px; right: 15px; width: 124px; height: 127px; border-radius: 48% 52% 42% 58%; }
.ktw-kefiran-grain i:nth-child(3) { right: 25px; bottom: 18px; width: 132px; height: 110px; border-radius: 62% 38% 54% 46%; }
.ktw-kefiran-grain i:nth-child(4) { bottom: 14px; left: 6px; width: 116px; height: 124px; border-radius: 42% 58% 47% 53%; }
.ktw-kefiran-lens { position: absolute; right: 4px; bottom: 42px; display: flex; width: 230px; height: 230px; border: 18px solid #fff; border-radius: 50%; align-items: center; justify-content: center; background: var(--kefiran-teal-dark); box-shadow: 0 24px 52px rgba(35,31,32,.18); transform: rotate(-12deg); }
.ktw-kefiran-lens::before { position: absolute; top: -105px; left: 78px; width: 28px; height: 115px; border-radius: 999px; background: var(--kefiran-ink); content: ""; }
.ktw-kefiran-lens span { width: 27px; height: 27px; margin-left: -5px; border: 4px solid #fff; border-radius: 50%; background: var(--kefiran-gold); }
.ktw-kefiran-lens span:nth-child(even) { background: var(--kefiran-coral); transform: translateY(26px); }
.ktw-kefiran-hero__visual small { position: absolute; right: 12px; bottom: 0; color: var(--kefiran-muted); font-size: 12px; }

.ktw-kefiran-plain { background: var(--kefiran-ink); color: #fff; }
.ktw-kefiran-plain__grid { display: grid; padding-block: 54px; grid-template-columns: minmax(280px,.62fr) repeat(2,minmax(0,.69fr)); gap: 0; }
.ktw-kefiran-plain h2 { max-width: 460px; margin: 0; padding: 20px 42px 20px 0; color: #fff; font-size: clamp(31px,3.8vw,48px); line-height: 1.06; }
.ktw-kefiran-plain article { min-height: 260px; padding: 28px 32px; border-left: 1px solid rgba(255,255,255,.23); }
.ktw-kefiran-plain article > span { color: #9ee4e6; font-size: 13px; font-weight: 850; letter-spacing: .07em; text-transform: uppercase; }
.ktw-kefiran-plain strong { display: block; margin: 50px 0 15px; font-size: 24px; line-height: 1.2; }
.ktw-kefiran-plain p { margin: 0; color: rgba(255,255,255,.8); font-size: 16px; line-height: 1.55; }

.ktw-kefiran-section { padding-block: 92px; }
.ktw-kefiran-heading { max-width: 820px; margin-bottom: 46px; }
.ktw-kefiran-heading h2 { margin: 0 0 16px; font-size: clamp(35px,4.5vw,56px); line-height: 1.04; letter-spacing: -.025em; }
.ktw-kefiran-heading p { max-width: 730px; margin: 0; color: var(--kefiran-muted); font-size: 19px; line-height: 1.56; }
.ktw-kefiran-zoom { background: var(--kefiran-sand); }
.ktw-kefiran-zoom__tool { display: grid; grid-template-columns: minmax(270px,.38fr) minmax(0,1fr); gap: 26px; }
.ktw-kefiran-zoom__tabs { display: grid; align-content: start; gap: 8px; }
.ktw-kefiran-zoom__tabs button { display: grid; min-height: 76px; padding: 12px 15px; border: 1px solid #aaa6a0; border-radius: 10px; align-items: center; grid-template-columns: 42px minmax(0,1fr); background: #fff; color: var(--kefiran-ink); text-align: left; cursor: pointer; gap: 12px; }
.ktw-kefiran-zoom__tabs button:hover { border-color: var(--kefiran-teal); background: var(--kefiran-pale); }
.ktw-kefiran-zoom__tabs button[aria-selected="true"] { border-color: var(--kefiran-ink); background: var(--kefiran-ink); color: #fff; }
.ktw-kefiran-zoom__tabs button span { color: var(--kefiran-teal-dark); font-size: 13px; font-weight: 850; }
.ktw-kefiran-zoom__tabs button[aria-selected="true"] span { color: var(--kefiran-gold); }
.ktw-kefiran-zoom__tabs button b { font-size: 16px; line-height: 1.18; }
.ktw-kefiran-zoom__panels { min-height: 570px; }
.ktw-kefiran-zoom__panels article { display: grid; min-height: 570px; padding: 46px; border-radius: 24px; align-items: center; grid-template-columns: minmax(220px,.36fr) minmax(0,1fr); background: #fff; box-shadow: 0 18px 44px rgba(35,31,32,.08); gap: 48px; }
.ktw-kefiran-zoom__panels small { color: var(--kefiran-teal-dark); font-size: 13px; font-weight: 850; letter-spacing: .06em; text-transform: uppercase; }
.ktw-kefiran-zoom__panels h3 { margin: 14px 0 20px; font-size: clamp(34px,4.1vw,52px); line-height: 1.05; }
.ktw-kefiran-zoom__panels p { margin: 0; color: var(--kefiran-muted); font-size: 19px; line-height: 1.58; }
.ktw-kefiran-stage-mark { position: relative; width: 220px; height: 220px; margin: auto; border: 2px solid var(--kefiran-teal); border-radius: 50%; background: var(--kefiran-pale); }
.ktw-kefiran-stage-mark i { position: absolute; border: 2px solid var(--kefiran-teal); background: #fff; }
.ktw-kefiran-stage-mark[data-stage="grain"] i { border-radius: 50% 42% 58% 46%; }
.ktw-kefiran-stage-mark[data-stage="grain"] i:nth-child(1) { inset: 42px 81px 84px 34px; }
.ktw-kefiran-stage-mark[data-stage="grain"] i:nth-child(2) { top: 34px; right: 38px; width: 82px; height: 76px; }
.ktw-kefiran-stage-mark[data-stage="grain"] i:nth-child(3) { right: 42px; bottom: 34px; width: 88px; height: 79px; }
.ktw-kefiran-stage-mark[data-stage="grain"] i:nth-child(4) { bottom: 36px; left: 24px; width: 73px; height: 81px; }
.ktw-kefiran-stage-mark[data-stage="compound"] { display: flex; padding: 44px 26px; align-items: center; }
.ktw-kefiran-stage-mark[data-stage="compound"] i { position: relative; width: 38px; height: 38px; margin-left: -5px; border-radius: 50%; background: var(--kefiran-gold); }
.ktw-kefiran-stage-mark[data-stage="compound"] i:nth-child(even) { background: var(--kefiran-coral); transform: translateY(30px); }
.ktw-kefiran-stage-mark[data-stage="material"] { border-radius: 18px; background: transparent; transform: rotate(-7deg); }
.ktw-kefiran-stage-mark[data-stage="material"]::before { position: absolute; inset: 22px; border: 1px dashed var(--kefiran-teal); border-radius: 12px; background: rgba(222,237,240,.6); content: ""; }
.ktw-kefiran-stage-mark[data-stage="material"] i { display: none; }
.ktw-kefiran-stage-mark[data-stage="product"] { border-radius: 18px; background: var(--kefiran-ink); }
.ktw-kefiran-stage-mark[data-stage="product"]::before { position: absolute; inset: 30px; border: 1px solid rgba(255,255,255,.5); border-radius: 10px; content: ""; }
.ktw-kefiran-stage-mark[data-stage="product"]::after { position: absolute; right: 54px; bottom: 50px; left: 54px; height: 48px; border-radius: 8px; background: var(--kefiran-gold); content: ""; }
.ktw-kefiran-stage-mark[data-stage="product"] i { display: none; }

.ktw-kefiran-material { overflow: hidden; background: var(--kefiran-teal-dark); color: #fff; }
.ktw-kefiran-material__intro { display: grid; margin-bottom: 52px; align-items: center; grid-template-columns: minmax(0,1fr) 350px; gap: 70px; }
.ktw-kefiran-material__intro h2 { max-width: 830px; margin: 0 0 20px; color: #fff; font-size: clamp(37px,4.7vw,60px); line-height: 1.03; }
.ktw-kefiran-material__intro p { max-width: 760px; margin: 0; color: rgba(255,255,255,.82); font-size: 19px; line-height: 1.56; }
.ktw-kefiran-sheet { position: relative; width: 300px; height: 250px; margin: auto; perspective: 700px; }
.ktw-kefiran-sheet::before, .ktw-kefiran-sheet i { position: absolute; inset: 38px 18px; border: 1px solid rgba(255,255,255,.7); border-radius: 18px; background: rgba(222,237,240,.16); content: ""; transform: rotateX(50deg) rotateZ(-12deg); box-shadow: 0 18px 45px rgba(0,0,0,.2); }
.ktw-kefiran-sheet i:nth-child(1) { transform: translateY(-25px) rotateX(50deg) rotateZ(-12deg); }
.ktw-kefiran-sheet i:nth-child(2) { transform: translateY(-50px) rotateX(50deg) rotateZ(-12deg); }
.ktw-kefiran-sheet i:nth-child(3) { transform: translateY(-75px) rotateX(50deg) rotateZ(-12deg); }
.ktw-kefiran-property-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.ktw-kefiran-property-grid article { min-height: 330px; padding: 32px; border: 1px solid rgba(255,255,255,.25); border-radius: 18px; background: rgba(255,255,255,.08); }
.ktw-kefiran-property-grid span { color: #9ee4e6; font-size: 13px; font-weight: 850; letter-spacing: .06em; text-transform: uppercase; }
.ktw-kefiran-property-grid h3 { margin: 58px 0 17px; color: #fff; font-size: 26px; line-height: 1.14; }
.ktw-kefiran-property-grid p { margin: 0; color: rgba(255,255,255,.78); font-size: 16px; line-height: 1.56; }

.ktw-kefiran-checker { background: var(--kefiran-pale); }
.ktw-kefiran-checker__tool { display: grid; grid-template-columns: minmax(300px,.44fr) minmax(0,1fr); gap: 28px; }
.ktw-kefiran-checker__buttons { display: grid; align-content: start; gap: 8px; }
.ktw-kefiran-checker__buttons button { min-height: 62px; padding: 13px 17px; border: 1px solid #aaa6a0; border-radius: 8px; background: #fff; color: var(--kefiran-ink); font-weight: 800; text-align: left; cursor: pointer; }
.ktw-kefiran-checker__buttons button:hover, .ktw-kefiran-checker__buttons button[aria-pressed="true"] { border-color: var(--kefiran-teal); background: var(--kefiran-teal-dark); color: #fff; }
.ktw-kefiran-checker__answers, .ktw-kefiran-checker__answers article { min-height: 470px; }
.ktw-kefiran-checker__answers article { display: flex; padding: 46px; border-radius: 24px; flex-direction: column; justify-content: flex-end; background: #fff; box-shadow: 0 18px 42px rgba(35,31,32,.08); }
.ktw-kefiran-checker__answers article > span { width: fit-content; margin-bottom: auto; padding: 8px 12px; border-radius: 999px; background: var(--kefiran-pale); color: var(--kefiran-teal-dark); font-size: 13px; font-weight: 850; }
.ktw-kefiran-checker__answers article[data-result="gate"] > span, .ktw-kefiran-checker__answers article[data-result="separate"] > span { background: #f8e9aa; color: #604b0a; }
.ktw-kefiran-checker__answers article[data-result="measure"] > span { background: #f6d9cf; color: #783622; }
.ktw-kefiran-checker__answers h3 { max-width: 650px; margin: 56px 0 18px; font-size: clamp(31px,3.8vw,48px); line-height: 1.06; }
.ktw-kefiran-checker__answers p { max-width: 700px; margin: 0; color: var(--kefiran-muted); font-size: 19px; line-height: 1.56; }

.ktw-kefiran-passport { background: var(--kefiran-sand); }
.ktw-kefiran-passport__head { display: grid; margin-bottom: 52px; align-items: center; grid-template-columns: minmax(0,1fr) 190px; gap: 70px; }
.ktw-kefiran-passport__head h2 { max-width: 860px; margin: 0 0 18px; font-size: clamp(37px,4.7vw,60px); line-height: 1.03; }
.ktw-kefiran-passport__head p { max-width: 730px; margin: 0; color: var(--kefiran-muted); font-size: 19px; }
.ktw-kefiran-passport__stamp { display: grid; width: 160px; height: 190px; margin: auto; border: 2px solid var(--kefiran-ink); border-radius: 12px; place-items: center; background: #fff; box-shadow: 9px 9px 0 var(--kefiran-pale); }
.ktw-kefiran-passport__stamp span { display: grid; width: 84px; height: 84px; border: 5px double var(--kefiran-teal); border-radius: 50%; color: var(--kefiran-teal-dark); font-size: 42px; font-weight: 850; place-items: center; transform: rotate(-11deg); }
.ktw-kefiran-passport__gates { margin: 0; padding: 0; border-top: 1px solid var(--kefiran-line); list-style: none; }
.ktw-kefiran-passport__gates li { display: grid; min-height: 116px; padding: 24px 4px; border-bottom: 1px solid var(--kefiran-line); align-items: center; grid-template-columns: 62px minmax(0,1fr) auto; gap: 18px; }
.ktw-kefiran-passport__gates li > span { color: var(--kefiran-teal-dark); font-size: 13px; font-weight: 850; }
.ktw-kefiran-passport__gates strong { display: block; margin-bottom: 5px; font-size: 22px; }
.ktw-kefiran-passport__gates p { margin: 0; color: var(--kefiran-muted); }
.ktw-kefiran-passport__gates li > b { padding: 7px 10px; border: 1px solid var(--kefiran-teal); border-radius: 999px; color: var(--kefiran-teal-dark); font-size: 12px; }

.ktw-kefiran-research { background: #fff; }
.ktw-kefiran-sources { border-top: 1px solid var(--kefiran-line); border-bottom: 1px solid var(--kefiran-line); }
.ktw-kefiran-sources summary { display: flex; min-height: 80px; padding: 18px 4px; align-items: center; justify-content: space-between; font-weight: 850; cursor: pointer; }
.ktw-kefiran-sources summary small { color: var(--kefiran-muted); }
.ktw-kefiran-sources ol { margin: 0; padding: 0 0 26px; list-style: none; }
.ktw-kefiran-sources li { display: grid; padding: 21px 4px; border-top: 1px solid var(--kefiran-line); grid-template-columns: minmax(0,1fr) auto; gap: 24px; }
.ktw-kefiran-sources a { color: var(--kefiran-teal-dark); font-weight: 800; text-decoration: underline; }
.ktw-kefiran-sources span { color: var(--kefiran-muted); font-size: 14px; }
.ktw-kefiran-next { display: grid; margin-top: 72px; padding: 46px; border-radius: 22px; align-items: end; grid-template-columns: minmax(0,1fr) auto; background: var(--kefiran-pale); gap: 48px; }
.ktw-kefiran-next span { color: var(--kefiran-teal-dark); font-size: 13px; font-weight: 850; letter-spacing: .06em; text-transform: uppercase; }
.ktw-kefiran-next h2 { max-width: 760px; margin: 10px 0 10px; font-size: clamp(31px,4vw,48px); line-height: 1.05; }
.ktw-kefiran-next p { max-width: 700px; margin: 0; color: var(--kefiran-muted); }
.ktw-kefiran-next a { display: inline-flex; min-height: 50px; padding: 11px 18px; border-radius: 999px; align-items: center; background: var(--kefiran-teal-dark); color: #fff; font-weight: 800; text-decoration: none; }
.ktw-kefiran-next a:hover { background: var(--kefiran-ink); }

@media (max-width: 960px) {
  .ktw-kefiran-hero__grid { min-height: 0; padding-block: 60px; grid-template-columns: 1fr; gap: 40px; }
  .ktw-kefiran-hero__visual { max-width: 570px; }
  .ktw-kefiran-plain__grid { grid-template-columns: 1fr 1fr; }
  .ktw-kefiran-plain h2 { grid-column: 1 / -1; }
  .ktw-kefiran-zoom__tool, .ktw-kefiran-checker__tool { grid-template-columns: 1fr; }
  .ktw-kefiran-zoom__tabs { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .ktw-kefiran-material__intro { grid-template-columns: minmax(0,1fr) 280px; gap: 40px; }
  .ktw-kefiran-sheet { width: 260px; }
  .ktw-kefiran-checker__buttons { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 640px) {
  .ktw-kefiran-hero__grid { padding-block: 38px 48px; }
  .ktw-kefiran-hero h1 { font-size: 44px; line-height: 1; }
  .ktw-zh .ktw-kefiran-hero h1 { font-size: 38px; line-height: 1.12; }
  .ktw-kefiran-hero__grid > div:first-child > p { font-size: 18px; }
  .ktw-kefiran-hero nav { display: grid; grid-template-columns: 1fr; }
  .ktw-kefiran-hero nav a { justify-content: center; }
  .ktw-kefiran-hero__visual { min-height: 390px; }
  .ktw-kefiran-grain { top: 64px; left: 0; width: 210px; height: 210px; }
  .ktw-kefiran-lens { right: 0; bottom: 40px; width: 190px; height: 190px; }
  .ktw-kefiran-lens::before { top: -82px; left: 62px; height: 90px; }
  .ktw-kefiran-lens span { width: 22px; height: 22px; }
  .ktw-kefiran-plain__grid { grid-template-columns: 1fr; }
  .ktw-kefiran-plain h2 { padding-right: 0; grid-column: auto; }
  .ktw-kefiran-plain article { min-height: 0; padding-inline: 0; border-top: 1px solid rgba(255,255,255,.23); border-left: 0; }
  .ktw-kefiran-plain strong { margin-top: 32px; }
  .ktw-kefiran-section { padding-block: 62px; }
  .ktw-kefiran-heading { margin-bottom: 32px; }
  .ktw-kefiran-heading h2 { font-size: 34px; }
  .ktw-kefiran-heading p { font-size: 17px; }
  .ktw-kefiran-zoom__tabs, .ktw-kefiran-checker__buttons { grid-template-columns: 1fr; }
  .ktw-kefiran-zoom__panels, .ktw-kefiran-zoom__panels article { min-height: 0; }
  .ktw-kefiran-zoom__panels article { padding: 30px 24px; grid-template-columns: 1fr; gap: 30px; }
  .ktw-kefiran-stage-mark { width: 190px; height: 190px; }
  .ktw-kefiran-zoom__panels h3 { font-size: 32px; }
  .ktw-kefiran-zoom__panels p { font-size: 17px; }
  .ktw-kefiran-material__intro { grid-template-columns: 1fr; }
  .ktw-kefiran-sheet { display: none; }
  .ktw-kefiran-property-grid { grid-template-columns: 1fr; }
  .ktw-kefiran-property-grid article { min-height: 0; }
  .ktw-kefiran-property-grid h3 { margin-top: 34px; }
  .ktw-kefiran-checker__answers, .ktw-kefiran-checker__answers article { min-height: 0; }
  .ktw-kefiran-checker__answers article { padding: 30px 24px; }
  .ktw-kefiran-checker__answers h3 { margin-top: 72px; font-size: 31px; }
  .ktw-kefiran-checker__answers p { font-size: 17px; }
  .ktw-kefiran-passport__head { grid-template-columns: 1fr; }
  .ktw-kefiran-passport__stamp { display: none; }
  .ktw-kefiran-passport__gates li { grid-template-columns: 38px minmax(0,1fr); }
  .ktw-kefiran-passport__gates li > b { width: fit-content; grid-column: 2; }
  .ktw-kefiran-sources li { grid-template-columns: 1fr; gap: 6px; }
  .ktw-kefiran-next { padding: 30px 24px; grid-template-columns: 1fr; gap: 28px; }
}

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