/* Isolated visual system for the first expert expansion experiences. */
.ktw-expert {
  --expert-ink: #231f20;
  --expert-teal: #02838d;
  --expert-teal-dark: #17656d;
  --expert-pale: #deedf0;
  --expert-sand: #fbf5ed;
  --expert-yellow: #f3bf37;
  --expert-coral: #e98467;
  --expert-line: #d6d6d6;
  --expert-muted: #5c595a;
  background: #fff;
  color: var(--expert-ink);
}

.ktw-expert button,
.ktw-expert input { font: inherit; }

.ktw-expert [hidden] { display: none !important; }

.ktw-expert-hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--expert-line); }
.ktw-expert-hero::before,
.ktw-expert-hero::after { position: absolute; border-radius: 50%; content: ""; pointer-events: none; }
.ktw-expert-hero::before { top: -210px; right: -120px; width: 520px; height: 520px; border: 1px solid rgba(35,31,32,.12); }
.ktw-expert-hero::after { right: 130px; bottom: -280px; width: 460px; height: 460px; background: rgba(255,255,255,.25); }
.ktw-expert-hero--label { background: #f4d45f; }
.ktw-expert-hero--grains { background: var(--expert-pale); }
.ktw-expert-hero--timeline { background: #dce8c9; }
.ktw-expert-hero__grid { position: relative; z-index: 1; display: grid; min-height: 620px; padding-block: 76px; align-items: center; grid-template-columns: minmax(0,1.08fr) minmax(360px,.72fr); gap: 80px; }
.ktw-expert-hero h1 { max-width: 840px; margin-bottom: 26px; font-size: clamp(44px,5.4vw,74px); line-height: .98; }
.ktw-zh .ktw-expert-hero h1 { font-size: clamp(41px,5vw,68px); line-height: 1.1; }
.ktw-expert-lead { max-width: 760px; margin-bottom: 0; color: #393536; font-size: clamp(19px,1.8vw,23px); line-height: 1.55; }
.ktw-expert-jump { display: inline-flex; min-height: 50px; margin-top: 30px; padding: 11px 20px; border: 2px solid var(--expert-ink); border-radius: 999px; align-items: center; font-weight: 750; text-decoration: none !important; gap: 12px; }
.ktw-expert-jump:hover { background: var(--expert-ink); color: #fff; }
.ktw-expert-answer-card { position: relative; z-index: 2; display: flex; min-height: 330px; padding: 42px; border: 1px solid rgba(35,31,32,.12); border-radius: 150px 22px 22px 22px; flex-direction: column; justify-content: flex-end; background: #fff; box-shadow: 0 24px 60px rgba(35,31,32,.12); }
.ktw-expert-answer-card::before { position: absolute; top: 28px; left: 48px; width: 64px; height: 64px; border: 14px solid var(--expert-teal); border-radius: 50%; content: ""; }
.ktw-expert-answer-card span { margin-bottom: 12px; color: var(--expert-teal-dark); font-size: 14px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.ktw-expert-answer-card strong { font-size: clamp(24px,2.6vw,35px); line-height: 1.15; }

.ktw-expert-section { padding-block: 92px; }
.ktw-expert-section--sand { background: var(--expert-sand); }
.ktw-expert-section--teal { background: var(--expert-teal-dark); color: #fff; }
.ktw-expert-section--teal h2,
.ktw-expert-section--teal h3 { color: #fff; }
.ktw-expert-heading { max-width: 800px; margin-bottom: 48px; }
.ktw-expert-heading h2 { margin-bottom: 16px; font-size: clamp(34px,4.2vw,54px); line-height: 1.05; }
.ktw-expert-heading > p:last-child { max-width: 720px; margin-bottom: 0; color: var(--expert-muted); font-size: 19px; }
.ktw-expert-section--teal .ktw-kicker { color: #9ee4e6; }

/* Label decoder */
.ktw-expert-label-layout { display: grid; align-items: stretch; grid-template-columns: minmax(360px,.82fr) minmax(0,1.18fr); gap: 46px; }
.ktw-mock-label { position: sticky; top: 100px; min-height: 690px; padding: 42px 38px 36px; border: 2px solid var(--expert-ink); border-radius: 38px 38px 90px 38px; align-self: start; background: #fff; box-shadow: 14px 14px 0 var(--expert-pale); }
.ktw-mock-label__brand { display: grid; width: 64px; height: 64px; margin-bottom: 30px; border-radius: 50% 50% 50% 18px; background: var(--expert-teal); color: #fff; font-size: 31px; font-weight: 800; place-items: center; }
.ktw-mock-label > p { margin-bottom: 5px; color: var(--expert-teal-dark); font-size: 14px; font-weight: 800; text-transform: uppercase; }
.ktw-mock-label > h3 { margin-bottom: 28px; font-size: 32px; }
.ktw-mock-label > ul { margin: 0 0 32px; padding: 0; border-top: 1px solid var(--expert-line); list-style: none; }
.ktw-mock-label > ul li { padding: 11px 0; border-bottom: 1px solid var(--expert-line); font-size: 15px; }
.ktw-mock-label__dots { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px; }
.ktw-mock-label__dots button { display: flex; min-height: 60px; padding: 9px 12px; border: 1px solid #aaa6a0; border-radius: 10px; align-items: center; background: #fff; color: var(--expert-ink); text-align: left; cursor: pointer; gap: 10px; }
.ktw-mock-label__dots button:hover,
.ktw-mock-label__dots button[aria-selected="true"] { border-color: var(--expert-teal); background: var(--expert-pale); }
.ktw-mock-label__dots button span { display: grid; width: 28px; height: 28px; border-radius: 50%; flex: 0 0 auto; background: var(--expert-ink); color: #fff; font-size: 13px; font-weight: 800; place-items: center; }
.ktw-mock-label__dots button[aria-selected="true"] span { background: var(--expert-teal); }
.ktw-mock-label__dots button b { font-size: 14px; line-height: 1.15; }
.ktw-expert-label-explanations { min-height: 690px; }
.ktw-expert-label-explanations article { min-height: 690px; padding: 58px; border: 1px solid var(--expert-line); border-radius: 22px; background: var(--expert-sand); }
.ktw-expert-label-explanations article > span { display: grid; width: 62px; height: 62px; margin-bottom: 100px; border: 2px solid var(--expert-teal); border-radius: 50%; color: var(--expert-teal-dark); font-weight: 800; place-items: center; }
.ktw-expert-label-explanations h3 { max-width: 620px; margin-bottom: 24px; font-size: clamp(32px,4vw,52px); line-height: 1.04; }
.ktw-expert-label-explanations p { max-width: 660px; margin-bottom: 0; color: var(--expert-muted); font-size: 21px; line-height: 1.55; }
.ktw-expert-comparison { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 22px; }
.ktw-expert-comparison article { min-height: 310px; padding: 38px; border: 1px solid var(--expert-line); border-radius: 20px; background: #fff; }
.ktw-expert-comparison h3 { margin-bottom: 18px; font-size: 30px; }
.ktw-expert-comparison p { margin-bottom: 0; color: var(--expert-muted); font-size: 18px; }
.ktw-expert-state-dot { display: block; width: 54px; height: 54px; margin-bottom: 40px; border: 13px solid var(--expert-teal); border-radius: 50%; }
.ktw-expert-state-dot--warm { border-color: var(--expert-coral); }

/* Shared callouts and links */
.ktw-expert-safety { display: grid; margin-top: 34px; padding: 32px 36px; border-left: 7px solid var(--expert-coral); background: #fff; grid-template-columns: minmax(190px,.42fr) minmax(0,1fr); gap: 32px; }
.ktw-expert-safety strong { font-size: 23px; line-height: 1.2; }
.ktw-expert-safety p { margin-bottom: 0; color: var(--expert-muted); }
.ktw-expert-safety a { align-self: end; font-weight: 800; text-decoration: underline; }
.ktw-expert-safety--light { margin-top: 44px; background: rgba(255,255,255,.1); color: #fff; grid-template-columns: minmax(190px,.35fr) minmax(0,1fr) auto; }
.ktw-expert-safety--light p { color: rgba(255,255,255,.84); }
.ktw-expert-next { display: grid; margin-top: 70px; padding-top: 54px; border-top: 1px solid var(--expert-line); align-items: end; grid-template-columns: minmax(0,1fr) minmax(300px,.6fr); gap: 50px; }
.ktw-expert-next h2 { max-width: 720px; margin-bottom: 0; font-size: clamp(31px,4vw,48px); }
.ktw-expert-next > a { display: flex; padding: 22px 0; border-top: 3px solid var(--expert-teal); border-bottom: 1px solid var(--expert-line); align-items: center; justify-content: space-between; color: var(--expert-teal-dark); font-size: 19px; font-weight: 800; text-decoration: none; gap: 24px; }
.ktw-expert-next > a span { font-size: 30px; }
.ktw-expert-sources { margin-top: 60px; padding-top: 24px; border-top: 1px solid var(--expert-line); }
.ktw-expert-sources summary { width: fit-content; cursor: pointer; color: inherit; font-weight: 750; }
.ktw-expert-sources ul { display: grid; max-width: 820px; margin: 24px 0 0; padding: 0; list-style: none; gap: 12px; }
.ktw-expert-sources li { display: grid; padding-bottom: 12px; border-bottom: 1px solid currentColor; grid-template-columns: minmax(0,1fr) auto; gap: 20px; }
.ktw-expert-sources a { text-decoration: underline; }
.ktw-expert-sources span { opacity: .72; font-size: 15px; }

/* Grain ecology */
.ktw-grain-orbit { position: relative; z-index: 2; min-height: 440px; }
.ktw-grain-orbit::before,
.ktw-grain-orbit::after { position: absolute; top: 50%; left: 50%; border: 1px solid rgba(35,31,32,.28); border-radius: 50%; content: ""; transform: translate(-50%,-50%); }
.ktw-grain-orbit::before { width: 330px; height: 330px; }
.ktw-grain-orbit::after { width: 230px; height: 230px; }
.ktw-grain-orbit__core { position: absolute; z-index: 2; top: 50%; left: 50%; display: grid; width: 155px; height: 155px; border-radius: 54% 46% 58% 42%; background: var(--expert-sand); box-shadow: inset 0 0 0 20px rgba(243,191,55,.45), 0 22px 50px rgba(35,31,32,.13); place-items: center; text-align: center; transform: translate(-50%,-50%) rotate(-8deg); }
.ktw-grain-orbit__core span { max-width: 90px; font-weight: 800; transform: rotate(8deg); }
.ktw-grain-orbit__node { position: absolute; z-index: 3; max-width: 150px; padding: 12px 15px; border: 1px solid var(--expert-ink); border-radius: 999px; background: #fff; font-size: 14px; font-weight: 800; line-height: 1.15; text-align: center; }
.ktw-grain-orbit__node--lab { top: 8%; left: 4%; }
.ktw-grain-orbit__node--yeast { top: 24%; right: 0; }
.ktw-grain-orbit__node--aab { bottom: 12%; left: 2%; }
.ktw-grain-orbit small { position: absolute; right: 0; bottom: 4%; left: 0; color: var(--expert-muted); font-size: 13px; text-align: center; }
.ktw-expert-role-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; }
.ktw-expert-role-grid article { min-height: 290px; padding: 34px; border: 1px solid var(--expert-line); border-radius: 18px; background: #fff; }
.ktw-expert-role-grid article > span { display: grid; width: 54px; height: 54px; margin-bottom: 42px; border-radius: 50%; background: var(--expert-pale); color: var(--expert-teal-dark); font-weight: 800; place-items: center; }
.ktw-expert-role-grid article:nth-child(2) > span { background: #f4d45f; color: var(--expert-ink); }
.ktw-expert-role-grid article:nth-child(3) > span { background: #f6cfbd; color: var(--expert-ink); }
.ktw-expert-role-grid article:nth-child(4) > span { background: #dce8c9; color: var(--expert-ink); }
.ktw-expert-role-grid h3 { margin-bottom: 14px; font-size: 27px; }
.ktw-expert-role-grid p { margin-bottom: 0; color: var(--expert-muted); }
.ktw-expert-tabs { display: inline-flex; margin-bottom: 38px; padding: 5px; border: 1px solid #aaa6a0; border-radius: 999px; background: var(--expert-sand); }
.ktw-expert-tabs button { min-height: 48px; padding: 10px 22px; border: 0; border-radius: 999px; background: transparent; color: var(--expert-ink); font-weight: 800; cursor: pointer; }
.ktw-expert-tabs button[aria-selected="true"] { background: var(--expert-ink); color: #fff; }
.ktw-grain-system { padding: 44px; border: 1px solid var(--expert-line); border-radius: 24px; background: #fff; }
.ktw-grain-system__intro { display: grid; padding-bottom: 46px; border-bottom: 1px solid var(--expert-line); align-items: center; grid-template-columns: 260px minmax(0,1fr); gap: 58px; }
.ktw-grain-system__intro h3 { margin-bottom: 16px; font-size: clamp(31px,4vw,48px); }
.ktw-grain-system__intro p:last-child { max-width: 680px; margin-bottom: 0; color: var(--expert-muted); font-size: 19px; }
.ktw-grain-shape { position: relative; width: 220px; height: 220px; margin: auto; filter: drop-shadow(0 18px 20px rgba(35,31,32,.12)); }
.ktw-grain-shape i { position: absolute; border: 2px solid rgba(35,31,32,.18); background: #fff9dc; }
.ktw-grain-shape i:nth-child(1) { inset: 32px 48px 52px 28px; border-radius: 58% 42% 51% 49%; }
.ktw-grain-shape i:nth-child(2) { top: 19px; right: 22px; width: 100px; height: 106px; border-radius: 48% 52% 42% 58%; }
.ktw-grain-shape i:nth-child(3) { right: 30px; bottom: 24px; width: 112px; height: 94px; border-radius: 62% 38% 54% 46%; }
.ktw-grain-shape i:nth-child(4) { bottom: 18px; left: 14px; width: 95px; height: 102px; border-radius: 42% 58% 47% 53%; }
.ktw-grain-shape--water i { border-radius: 36% 64% 42% 58%; background: rgba(218,242,240,.88); }
.ktw-grain-shape--water i:nth-child(2) { transform: rotate(18deg); }
.ktw-grain-shape--water i:nth-child(3) { transform: rotate(-13deg); }

/* Shared range interaction */
.ktw-expert-range { margin-top: 48px; }
.ktw-expert-range > label { display: block; margin-bottom: 20px; font-size: 17px; font-weight: 800; }
.ktw-expert-range input[type="range"] { width: 100%; height: 10px; margin: 0; border-radius: 999px; appearance: none; background: linear-gradient(90deg,var(--expert-teal),var(--expert-pale)); cursor: pointer; }
.ktw-expert-range input[type="range"]::-webkit-slider-thumb { width: 30px; height: 30px; border: 4px solid #fff; border-radius: 50%; appearance: none; background: var(--expert-teal); box-shadow: 0 0 0 2px var(--expert-ink); }
.ktw-expert-range input[type="range"]::-moz-range-thumb { width: 24px; height: 24px; border: 4px solid #fff; border-radius: 50%; background: var(--expert-teal); box-shadow: 0 0 0 2px var(--expert-ink); }
.ktw-expert-range__scale { display: flex; margin: 12px 0 32px; justify-content: space-between; color: var(--expert-muted); font-size: 14px; font-weight: 700; }
.ktw-expert-range__stages article { display: grid; min-height: 240px; padding: 34px; border-radius: 18px; background: var(--expert-sand); align-items: start; grid-template-columns: 60px minmax(0,1fr); gap: 24px; }
.ktw-expert-range__stages article > span { display: grid; width: 52px; height: 52px; border: 2px solid var(--expert-teal); border-radius: 50%; color: var(--expert-teal-dark); font-weight: 800; place-items: center; }
.ktw-expert-range__stages h3 { margin-bottom: 16px; font-size: 32px; }
.ktw-expert-range__stages p { margin-bottom: 0; color: var(--expert-muted); font-size: 18px; }
.ktw-expert-plain-answer { max-width: 880px; }
.ktw-expert-plain-answer h2 { margin-bottom: 26px; font-size: clamp(36px,5vw,59px); line-height: 1.03; }
.ktw-expert-plain-answer > p:last-child { max-width: 760px; margin-bottom: 0; color: rgba(255,255,255,.84); font-size: 20px; }

/* Fermentation timeline */
.ktw-timeline-dial { position: relative; z-index: 2; display: grid; width: 390px; height: 390px; margin: auto; padding: 70px; border: 1px solid rgba(35,31,32,.25); border-radius: 50%; background: rgba(255,255,255,.65); align-content: center; text-align: center; }
.ktw-timeline-dial::before { position: absolute; inset: 26px; border: 2px dotted rgba(35,31,32,.3); border-radius: 50%; content: ""; }
.ktw-timeline-dial span { color: var(--expert-teal-dark); font-size: 15px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.ktw-timeline-dial b { font-size: 33px; line-height: 1.1; }
.ktw-timeline-dial i { position: absolute; top: 42px; left: calc(50% - 4px); width: 8px; height: 132px; border-radius: 999px; background: var(--expert-coral); box-shadow: 0 0 0 5px #fff; transform: rotate(42deg); transform-origin: 50% 153px; }
.ktw-timeline-system { padding: 42px; border: 1px solid var(--expert-line); border-radius: 24px; }
.ktw-timeline-system__intro { max-width: 780px; margin-bottom: 0; color: var(--expert-muted); font-size: 20px; }
.ktw-timeline-system .ktw-expert-range__stages article { min-height: 290px; background: var(--expert-pale); }
.ktw-timeline-system .ktw-expert-range__stages article > div > p { margin-bottom: 10px; color: var(--expert-teal-dark); font-size: 14px; font-weight: 800; text-transform: uppercase; }
.ktw-timeline-system .ktw-expert-range__stages article strong { display: block; max-width: 760px; font-size: 20px; font-weight: 500; line-height: 1.55; }
.ktw-variable-tool { display: grid; grid-template-columns: 300px minmax(0,1fr); gap: 40px; }
.ktw-variable-tool__buttons { display: grid; align-content: start; gap: 8px; }
.ktw-variable-tool__buttons button { min-height: 58px; padding: 13px 18px; border: 1px solid #aaa6a0; border-radius: 8px; background: #fff; color: var(--expert-ink); font-weight: 800; text-align: left; cursor: pointer; }
.ktw-variable-tool__buttons button:hover,
.ktw-variable-tool__buttons button[aria-pressed="true"] { border-color: var(--expert-teal); background: var(--expert-pale); color: var(--expert-teal-dark); }
.ktw-variable-tool__answers article { min-height: 322px; padding: 44px; border-top: 6px solid var(--expert-teal); background: #fff; }
.ktw-variable-tool__answers article span { display: block; margin-bottom: 90px; color: var(--expert-teal-dark); font-weight: 800; }
.ktw-variable-tool__answers article p { max-width: 700px; margin-bottom: 0; font-size: clamp(23px,3vw,34px); font-weight: 700; line-height: 1.25; }

@media (max-width: 900px) {
  .ktw-expert-hero__grid { min-height: 0; padding-block: 60px; grid-template-columns: 1fr; gap: 46px; }
  .ktw-expert-answer-card { min-height: 250px; border-radius: 90px 20px 20px 20px; }
  .ktw-expert-label-layout { grid-template-columns: 1fr; }
  .ktw-mock-label { position: relative; top: auto; min-height: 0; }
  .ktw-expert-label-explanations,
  .ktw-expert-label-explanations article { min-height: 440px; }
  .ktw-expert-label-explanations article > span { margin-bottom: 54px; }
  .ktw-grain-system__intro { grid-template-columns: 210px minmax(0,1fr); gap: 34px; }
  .ktw-grain-shape { width: 190px; height: 190px; }
  .ktw-variable-tool { grid-template-columns: 1fr; }
  .ktw-variable-tool__buttons { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .ktw-expert-safety--light { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .ktw-expert-hero__grid { padding-block: 42px 50px; }
  .ktw-expert-hero h1 { font-size: 40px; line-height: 1.04; }
  .ktw-zh .ktw-expert-hero h1 { font-size: 38px; }
  .ktw-expert-lead { font-size: 18px; }
  .ktw-expert-answer-card { min-height: 220px; padding: 30px; }
  .ktw-expert-answer-card::before { top: 26px; left: 34px; width: 56px; height: 56px; border-width: 12px; }
  .ktw-expert-answer-card strong { font-size: 25px; }
  .ktw-expert-section { padding-block: 64px; }
  .ktw-expert-heading { margin-bottom: 34px; }
  .ktw-expert-heading h2 { font-size: 34px; }
  .ktw-mock-label { padding: 28px 22px; border-radius: 26px 26px 58px 26px; box-shadow: 8px 8px 0 var(--expert-pale); }
  .ktw-mock-label__dots { grid-template-columns: 1fr; }
  .ktw-expert-label-explanations,
  .ktw-expert-label-explanations article { min-height: 0; }
  .ktw-expert-label-explanations article { padding: 30px 24px; }
  .ktw-expert-label-explanations article > span { margin-bottom: 44px; }
  .ktw-expert-label-explanations h3 { font-size: 33px; }
  .ktw-expert-label-explanations p { font-size: 18px; }
  .ktw-expert-comparison,
  .ktw-expert-role-grid { grid-template-columns: 1fr; }
  .ktw-expert-role-grid article { min-height: 0; padding: 26px 24px; }
  .ktw-expert-role-grid article > span { margin-bottom: 24px; }
  .ktw-expert-safety { padding: 26px 24px; grid-template-columns: 1fr; gap: 14px; }
  .ktw-expert-next { margin-top: 52px; padding-top: 38px; grid-template-columns: 1fr; gap: 28px; }
  .ktw-expert-sources li { grid-template-columns: 1fr; gap: 4px; }
  .ktw-grain-orbit { min-height: 390px; }
  .ktw-grain-orbit::before { width: 300px; height: 300px; }
  .ktw-grain-orbit::after { width: 210px; height: 210px; }
  .ktw-grain-orbit__node { max-width: 125px; font-size: 12px; }
  .ktw-grain-system,
  .ktw-timeline-system { padding: 24px 20px; }
  .ktw-grain-system__intro { grid-template-columns: 1fr; gap: 24px; }
  .ktw-expert-tabs { display: grid; width: 100%; border-radius: 18px; grid-template-columns: 1fr 1fr; }
  .ktw-expert-tabs button { padding-inline: 12px; border-radius: 13px; }
  .ktw-expert-range__scale { font-size: 12px; }
  .ktw-expert-range__stages article { min-height: 0; padding: 24px 20px; grid-template-columns: 44px minmax(0,1fr); gap: 14px; }
  .ktw-expert-range__stages article > span { width: 40px; height: 40px; }
  .ktw-expert-range__stages h3 { font-size: 27px; }
  .ktw-timeline-dial { width: 310px; height: 310px; padding: 52px; }
  .ktw-timeline-dial i { top: 37px; height: 94px; transform-origin: 50% 118px; }
  .ktw-variable-tool__buttons { grid-template-columns: 1fr; }
  .ktw-variable-tool__answers article { min-height: 280px; padding: 30px 24px; }
  .ktw-variable-tool__answers article span { margin-bottom: 60px; }
  .ktw-variable-tool__answers article p { font-size: 25px; }
}

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