:root{
    --serif:"Crimson Pro", Georgia, serif;
    --sans:"Poppins", system-ui, sans-serif;
    --blue:#6FCEF6; --orange:#FFAE5C; --side:#F7F7F7; --card:#F2F2F2; --grey:#7A7A7A;
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{margin:0;background:#fff;color:#000;font-family:var(--sans);font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased}
  a{color:inherit}

  /* sidebar */
  .side{position:fixed;top:0;left:0;bottom:0;width:300px;background:var(--side);padding:20px 20px 75px;overflow-y:auto}
  .brand{display:block;text-decoration:none;margin:6px 0 34px}
  .brand img{display:block;width:210px;height:auto}
  .av{width:26px;height:26px;border-radius:50%;flex:none}
  .side .label{font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;margin:0 0 10px}
  .grp{background:var(--card);border-radius:5px;padding:12px;margin-bottom:16px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.06)}
  .grp a{display:block;text-decoration:none;font-size:14px;line-height:1.65;margin-bottom:3.5px}
  .grp .g{font-weight:500;color:#000}
  .grp .s{color:var(--grey);font-weight:400}
  .grp .s:hover,.grp .s.on{color:#000}
  .side .book{display:block;text-align:center;margin-top:8px}

  /* main column */
  .main{margin-left:300px}
  .col{max-width:800px;margin:0 auto;padding:0 50px}
  .head{text-align:center;padding:84px 0 40px}
  .head h1{font-size:56px;line-height:1.15;font-weight:500;letter-spacing:-.5px;margin:0 0 26px}
  .head .site{font-size:20px;font-weight:500;margin:0 0 26px}
  .by{display:inline-flex;align-items:center;gap:12px;font-size:15px}
  .by .av{width:40px;height:40px}

  article{font-family:var(--serif);font-size:22px;line-height:1.65}
  article p{margin:0 0 22px}
  article strong{font-weight:600}
  article h2{font-family:var(--sans);font-size:36px;line-height:1.2;font-weight:500;margin:64px 0 24px;text-decoration:underline 4px var(--blue);text-underline-offset:4px;scroll-margin-top:24px}
  article h3{font-family:var(--sans);font-size:27px;line-height:1.375;font-weight:500;margin:44px 0 18px;text-decoration:underline 3px var(--orange);text-underline-offset:3px;scroll-margin-top:24px}
  article ul,article ol{margin:0 0 22px;padding-left:28px}
  article li{margin-bottom:8px}
  article blockquote{margin:30px 0;padding:4px 0 4px 22px;border-left:4px solid #000;font-style:italic}
  figure{margin:11px 0 26px}
  figure svg,.eng{display:block;width:100%;border-radius:5px;background:var(--side)}
  figure svg{height:auto}
  .fig-img{display:block;width:75%;max-width:420px;height:auto;margin:0 auto}
  .fig-img.wide{width:100%;max-width:560px}
  figcaption{font-family:var(--sans);font-size:14px;color:var(--grey);text-align:center;margin-top:8px}

  .eng{padding:26px;display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:10px;align-items:center;font-family:var(--sans)}
  .eng .e{border:2px solid #000;border-radius:5px;padding:18px 8px;text-align:center;background:#fff;min-height:104px;display:flex;flex-direction:column;justify-content:center;gap:4px}
  .eng .e b{font-size:14px;font-weight:600}
  .eng .e span{font-size:12px;line-height:1.4}
  .eng .e1{background:var(--blue)} .eng .e2{background:var(--orange)}
  .eng .plus{font-weight:600;font-size:22px}
  .eng .base{grid-column:1/-1;background:#000;color:#fff;border-radius:5px;padding:12px;text-align:center;font-weight:500;font-size:14px;margin-top:4px}

  .offer{font-family:var(--sans);border-radius:5px;background:var(--card);box-shadow:inset 0 0 0 1px rgba(0,0,0,.06);padding:22px 24px;margin:0 0 16px}
  .offer .tag{display:inline-block;font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;background:var(--orange);padding:2px 10px;border-radius:5px;margin-bottom:8px}
  .offer h4{font-size:20px;font-weight:600;margin:0 0 6px}
  .offer p{font-family:var(--serif);font-size:20px;margin:0 0 6px}
  .offer .meta{font-size:13px;color:var(--grey);margin:0}

  .btn{display:inline-block;font-family:var(--sans);font-size:15px;font-weight:500;text-decoration:none;background:var(--blue);color:#000;font-weight:600;padding:12px 22px;border-radius:5px;line-height:1.4}
  .btn:hover{background:#4FC3F2}
  .cta{margin:8px 0 30px}
  .note{font-family:var(--sans);font-size:13px;color:var(--grey);line-height:1.6}
  .end{text-align:center;padding:30px 0 10px}
  footer{font-size:13px;color:var(--grey);text-align:center;padding:50px 0 60px}
  .mbook{display:none}

  @media (max-width:991px){
    .side{display:none}
    .main{margin-left:0}
    .col{padding:0 15px}
    .head{padding:56px 0 30px}
    .head h1{font-size:34px}
    .head .site{font-size:17px}
    article{font-size:20px}
    article h2{font-size:26px;margin-top:48px}
    article h3{font-size:22px}
    .eng{grid-template-columns:1fr;padding:16px}
    .eng .plus{text-align:center;line-height:1}
    .eng .e{min-height:0}
    .mbook{display:block;position:fixed;left:15px;right:15px;bottom:14px;text-align:center;z-index:5;box-shadow:0 6px 20px rgba(0,0,0,.18)}
    footer{padding-bottom:100px}
  }

  /* shared: site nav + subpages */
  .grp.nav a{font-weight:500}
  .grp.nav a.here{text-decoration:underline 2px var(--blue);text-underline-offset:3px}
  .topbar{display:none}
  @media (max-width:991px){
    .topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 15px;border-bottom:1px solid #eee;flex-wrap:wrap}
    .topbar img{width:150px;height:auto;display:block}
    .topbar nav{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:14px;font-weight:500}
    .topbar nav a{text-decoration:none}
    .topbar nav a.here{text-decoration:underline 2px var(--blue);text-underline-offset:3px}
  }
  .head .meta{font-size:14px;color:var(--grey);margin-top:10px}
  .head.left{text-align:left;padding-bottom:20px}
  .elist{list-style:none;padding:0;margin:0}
  .elist li{padding:22px 0;border-bottom:1px solid #eee;margin:0}
  .elist a.t{font-family:var(--sans);font-size:24px;font-weight:500;text-decoration:underline 3px var(--orange);text-underline-offset:3px}
  .elist .m{font-family:var(--sans);font-size:13px;color:var(--grey);margin:6px 0 8px}
  .elist p{margin:0}
  .quote{margin:0 0 34px;padding:0 0 0 22px;border-left:4px solid var(--blue);font-style:normal}
  .quote p{font-style:italic;margin:0 0 10px}
  .quote cite{font-family:var(--sans);font-size:14px;font-style:normal;color:var(--grey)}
  .pn{display:flex;justify-content:space-between;gap:20px;font-family:var(--sans);font-size:15px;margin:40px 0 0;padding-top:24px;border-top:1px solid #eee}
  .pn a{text-decoration:none;font-weight:500}
  .pn span{display:block;font-size:12px;color:var(--grey);font-weight:400}
  .ventures{font-family:var(--sans);font-size:17px}
  .ventures a{font-weight:500}
  .models{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
  .models figure{margin:0}
  .models img{width:100%;height:auto;display:block}
  @media (max-width:640px){.models{grid-template-columns:1fr}}
  .tidy{min-height:600px}

  /* phone contents drop-down (homepage) */
  .mtoc{display:none}
  @media (max-width:991px){
    .mtoc{display:block;position:sticky;top:0;z-index:6;background:#fff;border-bottom:1px solid #eee}
    .mtoc button{all:unset;box-sizing:border-box;width:100%;display:flex;align-items:center;gap:10px;padding:12px 15px;font-family:var(--sans);font-size:15px;cursor:pointer}
    .mtoc button b{font-weight:600;flex:none}
    .mtoc button span{flex:1;min-width:0;color:var(--grey);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:14px}
    .mtoc button i{flex:none;width:9px;height:9px;border-right:2px solid #000;border-bottom:2px solid #000;transform:rotate(45deg);margin:-4px 4px 0 0;transition:transform .15s}
    .mtoc button[aria-expanded="true"] i{transform:rotate(-135deg);margin-top:4px}
    .mtoc button:focus-visible{outline:2px solid var(--blue);outline-offset:-2px}
    #mtoc-panel{max-height:70vh;overflow-y:auto;padding:12px 15px 6px;background:var(--side);border-top:1px solid #eee;box-shadow:0 10px 20px rgba(0,0,0,.08)}
    #mtoc-panel .grp{margin-bottom:12px}
    #mtoc-panel a{font-size:15px;padding:3px 0}
    article h2,article h3{scroll-margin-top:64px}
  }
  .head .kicker{font-family:var(--sans);font-size:15px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--grey);margin:0 0 10px}
  .offer .price{font-family:var(--sans);font-size:22px;font-weight:700;margin:14px 0 0}
  article p.lead{font-size:24px;line-height:1.5}
  .placeholder{font-family:var(--sans);font-size:14px;font-weight:600;color:#7A4A06;background:#FFF4E5;border:2px dashed var(--orange);border-radius:5px;padding:28px 20px;text-align:center;margin:8px 0 26px}
  .by a{text-decoration:none}
  .by a:hover{text-decoration:underline 2px var(--blue);text-underline-offset:3px}
  .howi{font-family:var(--serif);font-size:18px;line-height:1.6;color:#333;border-top:1px solid #eee;margin-top:56px;padding-top:28px;scroll-margin-top:24px}
  .howi p{margin:0 0 12px}
  @media (max-width:991px){.howi{scroll-margin-top:64px}}
  .cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:8px 0 26px}
  .cards.three{grid-template-columns:1fr 1fr 1fr}
  .card{font-size:19px;line-height:1.5;background:var(--card);box-shadow:inset 0 0 0 1px rgba(0,0,0,.06);border-radius:5px;padding:20px 22px}
  .card h4,.cards .offer h4{font-family:var(--sans);font-size:18px;font-weight:600;margin:0 0 8px}
  .cards .offer{margin:0}
  .cards .placeholder{padding:14px 12px;margin:8px 0 0;font-size:12px}
  .tools a{font-weight:600;text-decoration:underline 3px var(--orange);text-underline-offset:3px}
  @media (max-width:760px){.cards,.cards.three{grid-template-columns:1fr}}
  .glance{list-style:none;padding:0;margin:0 0 26px}
  .glance li{padding:12px 0;border-bottom:1px solid #eee;margin:0}
  .glance b{font-family:var(--sans);font-size:16px;font-weight:600;margin-right:4px}
  .placeholder.inline{display:inline-block;padding:4px 10px;margin:0;font-size:12px}
  .tidy{min-height:700px;margin:10px 0 20px;border-radius:5px;overflow:hidden}
  .tidy iframe{border:0 !important;width:100% !important}

  /* KO logo */
  .brand img{width:150px;height:auto}
  @media (max-width:991px){.topbar img{width:96px}}

  /* dark mode: follows the visitor's system setting, no toggle */
  @media (prefers-color-scheme: dark){
    :root{--side:#161616;--card:#1F1F1F;--grey:#A3A3A3}
    body{background:#0E0E0E;color:#EDEDED}
    .grp{box-shadow:inset 0 0 0 1px rgba(255,255,255,.08)}
    .grp .g,.grp.nav a{color:#EDEDED}
    .grp .s:hover,.grp .s.on{color:#fff}
    .topbar,.mtoc{background:#0E0E0E;border-color:#262626}
    #mtoc-panel{border-color:#262626}
    .mtoc button i{border-color:#EDEDED}
    article blockquote{border-left-color:#EDEDED}
    .card,.offer{box-shadow:inset 0 0 0 1px rgba(255,255,255,.08)}
    .glance li,.elist li,.pn,.howi{border-color:#262626}
    .howi{color:#C9C9C9}
    .quote{border-left-color:var(--blue)}
    .fig-img{background:#fff;border-radius:6px;padding:10px}
    figure svg{background:#fff}
    .placeholder{background:#2A1E0E;color:#FFD39A}
    .btn:hover{background:#8AD8F8}
    .mbook{box-shadow:0 6px 20px rgba(0,0,0,.6)}
  }

  /* photos */
  .photo{display:block;width:100%;height:auto;border-radius:5px}
  .photo.narrow{max-width:420px;margin:0 auto}
  .av{object-fit:cover}
  .hero-photo{margin:0 0 34px}
  .photos{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:8px 0 14px}
  .photos figure{margin:0}
  .photos .photo{aspect-ratio:1/1;object-fit:cover}
  @media (max-width:640px){.photos{grid-template-columns:1fr}.photos .photo{aspect-ratio:auto}}
  footer a{font-weight:500}
  .card p{margin:0;font-size:18px;line-height:1.5}
  footer .soc{margin:0 0 10px;font-size:14px}
  footer .soc a{font-weight:500}

  @media (max-width:991px){.topbar nav{width:100%;flex-wrap:nowrap;justify-content:space-between;gap:4px;font-size:14px;font-weight:600}.topbar nav a{white-space:nowrap}}