:root{
    --ink:#111214;
    --ink-2:#4a4d52;
    --ink-3:#8b8f96;
    --line:#e4e5e8;
    --line-2:#ededf0;
    --paper:#ffffff;
    --paper-2:#fafafb;
    --accent:#ff6600;
    --accent-ink:#ff660019;
    --maxw:1200px;
    --gut:40px;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{
    font-family:'Noto Sans KR',system-ui,sans-serif;
    background:var(--paper);
    color:var(--ink);
    line-height:1.6;
    font-weight:400;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gut)}

  .label{
    font-size:11px;font-weight:700;letter-spacing:.24em;
    text-transform:uppercase;color:var(--ink-3);
  }
  .label .dot{color:var(--accent)}

  /* ---------- NAV ---------- */
  header.nav{
    position:sticky;top:0;z-index:50;
    background:rgba(255,255,255,.86);
    backdrop-filter:saturate(180%) blur(12px);
    -webkit-backdrop-filter:saturate(180%) blur(12px);
    border-bottom:1px solid var(--line);
  }
  .nav-inner{
    display:flex;align-items:center;justify-content:space-between;
    height:72px;
  }
  .brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:-.01em}
  .brand img{width:34px;height:34px;border-radius:9px;object-fit:cover}
  .brand span{font-size:17px}
  .nav-menu{display:flex;align-items:center;gap:38px}
  .nav-menu a{
    font-size:14px;font-weight:500;color:var(--ink-2);
    position:relative;padding:4px 0;transition:color .2s;
  }
  .nav-menu .btn{display:none}
  .nav-menu a::after{
    content:"";position:absolute;left:0;right:100%;bottom:-2px;height:1.5px;
    background:var(--accent);transition:right .25s ease;
  }
  .nav-menu a:hover{color:var(--ink)}
  .nav-menu a:hover::after{right:0}
  .btn{
    display:inline-flex;align-items:center;gap:8px;
    font-family:inherit;font-size:14px;font-weight:700;letter-spacing:-.01em;
    padding:12px 22px;border-radius:999px;cursor:pointer;border:1px solid var(--ink);
    transition:transform .18s ease, background .2s, color .2s, border-color .2s;
  }
  .btn-solid{background:var(--ink);color:#fff;border-color:var(--ink)}
  .btn-solid:hover{background:var(--accent);border-color:var(--accent)}
  .btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
  .btn-ghost:hover{border-color:var(--ink)}
  .btn-accent{background:var(--accent);color:#fff;border-color:var(--accent)}
  .btn-accent:hover{transform:translateY(-1px);filter:brightness(1.08)}
  .nav .btn{padding:10px 20px}
  .nav-toggle{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
  .nav-toggle span{width:22px;height:2px;background:var(--ink);display:block}

  /* ---------- HERO ---------- */
  .hero{border-bottom:1px solid var(--line);position:relative;overflow:hidden}
  .hero-grid{
    display:grid;grid-template-columns:1.05fr .95fr;
    align-items:stretch;
  }
  .hero-left{padding:96px var(--gut) 96px 0;border-right:1px solid var(--line)}
  .hero-left-inner{max-width:560px;margin-left:auto;padding-left:var(--gut)}
  .kicker{
    display:inline-flex;align-items:center;gap:10px;margin-bottom:34px;
    padding:7px 14px;border:1px solid var(--line);border-radius:999px;
    font-size:11px;font-weight:700;letter-spacing:.18em;color:var(--ink-2);
  }
  .kicker b{color:var(--accent)}
  .hero h1{
    font-size:clamp(38px,5.4vw,68px);line-height:1.08;font-weight:800;
    letter-spacing:-.03em;margin-bottom:26px;
  }
  .hero h1 .hi{color:var(--accent)}
  .hero p.lead{
    font-size:17px;color:var(--ink-2);font-weight:400;max-width:460px;margin-bottom:38px;
  }
  .hero-cta{display:flex;gap:12px;flex-wrap:wrap}
  .hero-cta .btn{padding:15px 28px}
  .hero-stats{
    display:flex;gap:0;margin-top:56px;border-top:1px solid var(--line);
  }
  .hero-stats .st{padding:22px 26px 0 0;margin-right:26px;border-right:1px solid var(--line);flex:1}
  .hero-stats .st:last-child{border-right:none;margin-right:0}
  .hero-stats .num{font-size:28px;font-weight:800;letter-spacing:-.02em}
  .hero-stats .num em{color:var(--accent);font-style:normal}
  .hero-stats .cap{font-size:12px;color:var(--ink-3);font-weight:500;margin-top:2px}

  .hero-right{
    position:relative;background:var(--paper-2);
    display:flex;align-items:center;justify-content:center;
    padding:72px 40px;overflow:hidden;
  }
  .hero-right::before{
    content:"";position:absolute;inset:0;
    background-image:linear-gradient(var(--line-2) 1px,transparent 1px),linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
    background-size:40px 40px;opacity:.6;
  }
  .hero-visual{position:relative;z-index:2;text-align:center}
  .hero-visual img{
    width:auto;max-height:440px;filter:drop-shadow(0 30px 50px rgba(17,18,20,.16));
    transition:transform .5s cubic-bezier(.2,.7,.2,1);
  }
  .hero-visual img:hover{transform:translateY(-8px)}
  .hero-tagpill{
    position:absolute;z-index:3;top:64px;right:52px;
    background:var(--accent);color:#fff;border-radius:999px;
    font-size:12px;font-weight:700;letter-spacing:.02em;padding:9px 16px;
  }
  .hero-caption{
    position:absolute;z-index:3;bottom:40px;left:44px;
    font-size:11px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3);
  }

  /* ---------- SECTION SHELL ---------- */
  section{padding:110px 0}
  .sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:56px}
  .sec-head h2{font-size:clamp(28px,3.4vw,42px);font-weight:800;letter-spacing:-.03em;line-height:1.1}
  .sec-head .label{margin-bottom:14px;display:block}
  .sec-head .idx{font-size:13px;color:var(--ink-3);font-weight:500;white-space:nowrap}

  /* ---------- BOOKS ---------- */
  #books{background:var(--paper)}
  .books-grid{
    display:grid;grid-template-columns:repeat(3,1fr);
    border-top:1px solid var(--line);border-left:1px solid var(--line);
  }
  /* 소규모 시리즈(2권 이하)를 넓게 늘리지 않고 좌측 정렬 카드로 */
  .books-grid.compact{grid-template-columns:repeat(2,minmax(0,320px))}
  .book{
    border-right:1px solid var(--line);border-bottom:1px solid var(--line);
    padding:30px 26px 32px;background:var(--paper);
    transition:background .25s;position:relative;
  }
  .book:hover{background:var(--paper-2)}
  .book-cover{
    aspect-ratio:3/4;display:flex;align-items:center;justify-content:center;
    margin-bottom:24px;position:relative;
  }
  .book-cover img{
    max-height:100%;max-width:100%;width:auto;
    filter:drop-shadow(0 14px 24px rgba(17,18,20,.12));
    transition:transform .35s cubic-bezier(.2,.7,.2,1);
  }
  .book:hover .book-cover img{transform:translateY(-6px)}
  .badge{
    display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.14em;
    text-transform:uppercase;padding:5px 11px;border-radius:999px;margin-bottom:12px;
  }
  .badge.sale{background:var(--accent);color:#fff}
  .badge.soon{background:transparent;color:var(--ink-3);border:1px solid var(--line)}
  .book h3{font-size:19px;font-weight:700;letter-spacing:-.02em;margin-bottom:6px}
  .book .desc{font-size:13px;color:var(--ink-3);font-weight:400}
  .book .buy{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13px;font-weight:700;color:var(--accent);letter-spacing:-.01em;transition:gap .18s}
  .book .buy:hover{gap:10px}
  .book .buy .ar{font-size:14px}

  /* ---------- ABOUT ---------- */
  #about{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:start}
  .about-grid h2{font-size:clamp(28px,3.6vw,46px);font-weight:800;letter-spacing:-.03em;line-height:1.12}
  .about-grid h2 em{color:var(--accent);font-style:normal}
  .about-body p{font-size:16px;color:var(--ink-2);margin-bottom:22px}
  .about-body p:last-of-type{margin-bottom:0}
  .about-body .big{font-size:19px;color:var(--ink);font-weight:500}
  .flow{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin:34px 0 0}
  .flow .step{
    font-size:13px;font-weight:600;color:var(--ink);
    padding:9px 16px;border:1px solid var(--line);border-radius:8px;background:var(--paper);
  }
  .flow .arr{color:var(--accent);font-weight:700}
  .chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
  .chip{
    font-size:12.5px;font-weight:600;letter-spacing:.01em;
    padding:8px 15px;border-radius:999px;
    background:var(--accent-ink);color:var(--accent);
  }
  .about-label{margin-bottom:20px;display:block}
  .stat-50{
    margin-top:8px;padding:26px 0 0;border-top:1px solid var(--line);
  }
  .stat-50 .n{font-size:52px;font-weight:800;letter-spacing:-.03em;color:var(--accent);line-height:1}
  .stat-50 .c{font-size:13px;color:var(--ink-2);font-weight:500;margin-top:10px}

  /* ---------- CONTACT ---------- */
  #contact .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:14px;overflow:hidden}
  .contact-left{padding:52px 48px;border-right:1px solid var(--line)}
  .contact-right{padding:52px 48px;background:var(--paper-2);display:flex;flex-direction:column;justify-content:space-between}
  .contact-left h2{font-size:32px;font-weight:800;letter-spacing:-.03em;margin-bottom:8px}
  .contact-left .sub{font-size:15px;color:var(--ink-2);margin-bottom:36px}
  .cinfo{display:flex;flex-direction:column;gap:0}
  .cinfo .row{
    display:flex;align-items:baseline;gap:18px;padding:18px 0;border-top:1px solid var(--line);
  }
  .cinfo .row:last-child{border-bottom:1px solid var(--line)}
  .cinfo .k{font-size:11px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3);width:80px;flex-shrink:0}
  .cinfo .v{font-size:16px;font-weight:500;color:var(--ink)}
  .cinfo .v a:hover{color:var(--accent)}
  .contact-right .sns-label{margin-bottom:22px;display:block}
  .sns{display:flex;flex-direction:column;gap:12px}
  .sns a{
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 22px;border:1px solid var(--line);border-radius:12px;background:var(--paper);
    font-weight:700;font-size:15px;transition:border-color .2s,transform .18s,color .2s;
  }
  .sns a:hover{border-color:var(--accent);color:var(--accent);transform:translateX(4px)}
  .sns a .arrow{font-size:18px;color:var(--ink-3);transition:color .2s}
  .sns a:hover .arrow{color:var(--accent)}
  .contact-right .cta-note{font-size:13px;color:var(--ink-3);margin-top:28px}

  /* ---------- FOOTER ---------- */
  footer{border-top:1px solid var(--line);padding:44px 0}
  .foot-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
  .foot-brand{display:flex;align-items:center;gap:11px;font-weight:800}
  .foot-brand img{width:28px;height:28px;border-radius:8px;object-fit:cover}
  .foot-inner .copy{font-size:13px;color:var(--ink-3);font-weight:400}
  .foot-inner .copy b{color:var(--ink-2);font-weight:600}

  /* ---------- RESPONSIVE ---------- */
  @media(max-width:1000px){
    :root{--gut:28px}
    .hero-grid{grid-template-columns:1fr}
    .hero-left{border-right:none;border-bottom:1px solid var(--line);padding:72px 0 66px}
    .hero-left-inner{margin:0 auto;padding:0 var(--gut);max-width:var(--maxw)}
    .hero-right{padding:56px 30px}
    .books-grid{grid-template-columns:repeat(2,1fr)}
    .about-grid{grid-template-columns:1fr;gap:44px}
  }
  @media(max-width:860px){
    .nav-menu{
      position:absolute;top:72px;left:0;right:0;
      flex-direction:column;align-items:stretch;gap:0;
      background:#fff;border-bottom:1px solid var(--line);
      padding:8px var(--gut) 20px;display:none;
    }
    .nav-menu.open{display:flex}
    .nav-menu a{padding:14px 0;border-bottom:1px solid var(--line-2);font-size:15px}
    .nav-menu a::after{display:none}
    .nav-menu .btn{display:flex;margin-top:14px;justify-content:center}
    .nav-toggle{display:flex}
    .nav .btn.desk{display:none}
    section{padding:76px 0}
    .sec-head{flex-direction:column;align-items:flex-start;gap:6px}
    #contact .contact-grid{grid-template-columns:1fr}
    .contact-left{border-right:none;border-bottom:1px solid var(--line);padding:40px 30px}
    .contact-right{padding:40px 30px}
    .hero-stats{flex-wrap:wrap}
  }
  @media(max-width:520px){
    .books-grid{grid-template-columns:1fr}
    .books-grid.compact{grid-template-columns:min(320px,100%)}
    .hero-stats .st{border-right:none;margin-right:0;padding-right:0}
    .hero h1{font-size:clamp(34px,10vw,46px)}
    .contact-left,.contact-right{padding:32px 24px}
  }