:root{
  --bg:#eef3f8;
  --surface:#ffffff;
  --surface-soft:#f7faff;
  --line:#d6e1ef;
  --line-strong:#c7d6ea;
  --text:#16345f;
  --muted:#68809f;
  --blue:#2e67dc;
  --blue-deep:#1d4db8;
  --kakao:#fee500;
  --shadow:0 18px 40px rgba(41,83,154,.10);
  --radius:28px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Apple SD Gothic Neo','Noto Sans KR',sans-serif;color:var(--text);background:linear-gradient(180deg,#f3f7fb 0%, #edf2f7 100%);}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.header,.hero,.refined-quick,.refined-section-head,.books,.talks-section,.cta,.footer-compact,.author-page,.policy-page{width:min(1180px,calc(100% - 32px));margin-inline:auto}
.header{display:flex;justify-content:space-between;align-items:center;padding:22px 0 16px;gap:16px;position:sticky;top:0;z-index:10;background:rgba(243,247,251,.88);backdrop-filter:blur(14px)}
.logo-horizontal{width:180px}.logo-stack{display:none;width:88px}
nav{display:flex;flex-wrap:wrap;gap:10px}
nav a{padding:10px 14px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.75);font-size:14px;font-weight:700;color:var(--text)}
nav a:hover{border-color:#aac4ea;color:var(--blue)}
.label{margin:0 0 12px;letter-spacing:.18em;font-size:14px;font-weight:800;color:#446891}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:center;padding:28px 0 26px}
.hero-copy,.visual,.section-head,.talks-section,.cta,.author-card,.footer-compact,.policy-page{background:rgba(255,255,255,.62);border:1px solid var(--line);box-shadow:var(--shadow)}
.hero-copy{padding:42px;border-radius:34px}
.hero h1{margin:0 0 18px;font-size:clamp(34px,4.3vw,56px);line-height:1.1;letter-spacing:-.03em}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}
.hero-tags span,.author-points span{padding:10px 14px;border-radius:999px;background:#f5f8fd;border:1px solid var(--line);font-size:14px;font-weight:700;color:#365986}
.desc{margin:0 0 24px;color:var(--muted);font-size:18px;line-height:1.65}
.actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:16px 22px;border-radius:18px;font-weight:800;transition:.18s transform ease,.18s box-shadow ease}
.btn:hover,.quick-card:hover,.talk-card:hover,.books article:hover{transform:translateY(-2px)}
.btn.primary{color:#fff;background:linear-gradient(135deg,var(--blue-deep),#3f7bff);box-shadow:0 16px 30px rgba(46,103,220,.26)}
.btn.hero-secondary{background:#fff;border:1px solid var(--line);color:var(--text)}
.play-dot,.play-mark{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;background:#eff5ff;color:var(--blue);font-size:12px}
.visual{min-height:420px;border-radius:34px;padding:26px;display:grid;place-items:center;position:relative;overflow:hidden}
.visual::before,.visual::after{content:"";position:absolute;border-radius:50%;background:radial-gradient(circle,#dce9fb,transparent 70%);opacity:.9}
.visual::before{width:220px;height:220px;top:-60px;right:-30px}.visual::after{width:180px;height:180px;left:-50px;bottom:-60px}
.cover-stack{position:relative;width:min(92%,420px);height:330px}
.cover{position:absolute;width:48%;border-radius:20px;box-shadow:0 18px 38px rgba(25,58,119,.15);border:1px solid rgba(210,223,240,.9);background:white}
.cover-written{left:7%;top:18px;transform:rotate(-4deg)}
.cover-practical{right:8%;top:34px;transform:rotate(5deg)}
.refined-quick{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;padding:0 0 26px}
.quick-card{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;min-height:176px;padding:26px 20px;border-radius:28px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}
.quick-card.main{background:linear-gradient(135deg,var(--blue-deep),#5f8ef3);color:#fff;border:none}
.quick-card b{display:block;margin:14px 0 8px;font-size:18px}
.quick-card span:last-child{font-size:14px;color:var(--muted)}
.quick-card.main span:last-child{color:#eef4ff}
.mini-icon{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:#f2f6fd;border:1px solid var(--line);font-size:22px}
.quick-card.main .mini-icon{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.16);color:#fff}
.refined-section-head,.talks-section,.cta,.footer-compact,.author-card{border-radius:32px}
.refined-section-head{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:34px;margin-bottom:18px}
.section-head-copy h2,.talk-head h2,.cta h2,.author-card h2{margin:0 0 14px;font-size:clamp(32px,3.7vw,48px);line-height:1.08;letter-spacing:-.03em}
.section-head-copy p:not(.label),.talk-head p:not(.label){margin:0;color:var(--muted);font-size:18px;line-height:1.6}
.section-head-actions{display:flex;gap:12px;flex-wrap:wrap}
.mini-btn{display:inline-flex;align-items:center;justify-content:center;padding:16px 18px;border-radius:18px;font-weight:800;border:1px solid var(--line);background:#fff;min-width:150px}
.mini-btn.solid{background:linear-gradient(135deg,var(--blue-deep),#3e73ea);border:none;color:#fff;box-shadow:0 14px 28px rgba(46,103,220,.22)}
.books{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:18px}
.books article{min-height:220px;padding:28px;border-radius:28px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);display:flex;flex-direction:column}
.books article span{align-self:flex-start;padding:8px 12px;border-radius:999px;background:#edf3ff;color:#4e74d8;font-size:13px;font-weight:800}
.books article h3{margin:22px 0 18px;font-size:23px;line-height:1.18;letter-spacing:-.03em}
.books article p{margin:0;font-size:18px;line-height:1.75;color:#244a78}
.books article em{font-style:normal;color:#f28b34;font-weight:800;background:#fff4ea;padding:2px 8px;border-radius:999px;margin-left:4px;font-size:14px}
.talks-section{padding:34px;margin-bottom:18px}
.talk-head{display:block;padding:0;background:none;border:none;box-shadow:none;margin-bottom:20px}
.talk-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.talk-card{display:flex;align-items:center;gap:16px;padding:22px;border-radius:24px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}
.talk-icon{flex:0 0 58px;width:58px;height:58px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(180deg,#f5f9ff 0%, #e7f0ff 100%);border:1px solid #cddcf5;box-shadow:inset 0 1px 0 rgba(255,255,255,.9)}
.talk-copy h3{margin:0 0 7px;font-size:22px;letter-spacing:-.03em}
.talk-copy p{margin:0 0 4px;font-size:15px;font-weight:800;color:#2f5fb6}
.talk-copy .talk-hint{font-size:14px;color:var(--muted)}
.talk-glyph{display:inline-grid;place-items:center;width:34px;height:26px;border-radius:14px;background:linear-gradient(135deg,#4f7fe6,#2e67dc);color:#fff;font-size:16px;font-weight:900;letter-spacing:1px;position:relative;line-height:1}
.talk-glyph::after{content:"";position:absolute;left:7px;bottom:-5px;border:6px solid transparent;border-top-color:#3f74e2;border-right:0;transform:rotate(24deg)}
.cta{padding:34px;text-align:center;margin-bottom:24px;background:linear-gradient(135deg,var(--blue-deep),#4e7feb);color:#fff}
.cta-label{margin:0 0 12px;font-size:13px;font-weight:800;letter-spacing:.18em;color:#e6edff}
.cta p:not(.cta-label){margin:0 0 20px;font-size:18px;color:#eef4ff}.btn.white{background:#fff;color:var(--blue-deep)}
.footer-compact{padding:24px 28px 30px;display:flex;justify-content:space-between;gap:24px;align-items:flex-start;margin-bottom:26px}
.footer-compact-brand{display:flex;gap:14px;align-items:center}.footer-logo{width:54px;height:auto}.footer-compact-brand b{display:block;font-size:20px}.footer-compact-brand span,.footer-compact-info p{color:var(--muted)}
.footer-compact-info{font-size:15px;line-height:1.75}.divider{margin:0 10px;color:#b1c3da}.policy-links a{font-weight:800;color:var(--text)}
.popup{position:fixed;inset:0;display:grid;place-items:center;background:rgba(7,21,41,.42);padding:18px;z-index:50}
.popup.hidden{display:none}.popup-card{position:relative;width:min(470px,100%);padding:28px;border-radius:28px;background:#fff;border:1px solid var(--line);box-shadow:0 26px 50px rgba(10,24,49,.25)}
.popup-card #close{position:absolute;right:16px;top:12px;border:none;background:none;font-size:28px;line-height:1;cursor:pointer;color:#6d84a3}
.popup-card h2{margin:8px 0 14px;font-size:30px;line-height:1.1;letter-spacing:-.03em}.popup-card p{color:var(--muted);line-height:1.6}.full{width:100%;margin-top:14px}.today{margin-top:12px;border:none;background:none;color:#7992b1;cursor:pointer;font-weight:700}
.author-page{padding:16px 0 28px}.author-card{padding:40px}.author-main{margin:0 0 12px;font-size:28px;font-weight:900;letter-spacing:-.03em}.author-desc{margin:0 0 20px;font-size:20px;line-height:1.7;color:var(--muted)}
.author-points{display:flex;flex-wrap:wrap;gap:10px 12px;margin-bottom:26px}.cert-section{padding:20px;border:1px solid var(--line);border-radius:26px;background:rgba(255,255,255,.6)}
.cert-section h3{margin:0 0 14px;font-size:32px;letter-spacing:-.03em}.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.cert-item{padding:15px 16px;border-radius:18px;background:#f7faff;border:1px solid var(--line);font-weight:800}
.author-cta{margin-top:28px}.author-cta.refined{width:max-content;background:linear-gradient(135deg,#ff626b,#566cff);color:#fff;box-shadow:0 16px 34px rgba(95,111,240,.28)}
.policy-page{padding:26px 28px 34px;border-radius:32px;margin-top:28px;margin-bottom:28px}.policy-back{display:inline-flex;padding:11px 16px;border-radius:999px;background:#edf4ff;border:1px solid var(--line);font-weight:800;color:var(--blue-deep)}
.policy-page h1{margin:24px 0 16px;font-size:clamp(36px,5vw,60px);line-height:1.06;letter-spacing:-.04em}.policy-page > p{font-size:18px;color:var(--muted);line-height:1.7}
.policy-page section{padding-top:10px}.policy-page h2{margin:22px 0 10px;font-size:26px;letter-spacing:-.03em}.policy-page section p{font-size:17px;color:#35547c;line-height:1.8}
@media (max-width:1100px){
  .hero{grid-template-columns:1fr}.refined-quick,.books{grid-template-columns:repeat(2,1fr)}.talk-grid{grid-template-columns:1fr}.footer-compact{flex-direction:column}.refined-section-head{flex-direction:column;align-items:flex-start}.section-head-actions{width:100%}.section-head-actions .mini-btn{flex:1}
}
@media (max-width:760px){
  .header{position:static;flex-direction:column;align-items:flex-start}.logo-horizontal{display:none}.logo-stack{display:block}nav{width:100%}
  nav a{font-size:14px;padding:10px 13px;font-weight:800;letter-spacing:-.01em}.hero-copy,.visual,.talks-section,.refined-section-head,.cta,.author-card,.footer-compact,.policy-page{border-radius:24px}
  .hero-copy{padding:28px}.desc,.section-head-copy p:not(.label),.talk-head p:not(.label),.author-desc,.policy-page > p{font-size:16px}.refined-quick,.books,.cert-grid{grid-template-columns:1fr}
  .quick-card{min-height:150px}.books article{min-height:unset}.cover-stack{height:280px}.talk-card{padding:18px}.talk-copy h3{font-size:19px}.footer-compact{padding:20px}.policy-page{padding:22px}
}


/* v20 force fix: openchat card rendering */
.talks-section{
  padding:34px !important;
  margin-bottom:18px !important;
  border-radius:32px !important;
  background:rgba(255,255,255,.62) !important;
  border:1px solid var(--line) !important;
  box-shadow:var(--shadow) !important;
}
.talk-grid{
  display:grid !important;
  grid-template-columns:repeat(2, minmax(0,1fr)) !important;
  gap:16px !important;
}
.talk-card{
  display:flex !important;
  align-items:center !important;
  gap:16px !important;
  padding:22px !important;
  border-radius:24px !important;
  background:#fff !important;
  border:1px solid var(--line) !important;
  box-shadow:var(--shadow) !important;
}
.talk-icon{
  flex:0 0 58px !important;
  width:58px !important;
  height:58px !important;
  border-radius:18px !important;
  display:grid !important;
  place-items:center !important;
  background:linear-gradient(180deg,#f5f9ff 0%, #e7f0ff 100%) !important;
  border:1px solid #cddcf5 !important;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.9) !important;
}
.talk-glyph{
  display:inline-grid !important;
  place-items:center !important;
  width:34px !important;
  height:26px !important;
  border-radius:14px !important;
  background:linear-gradient(135deg,#4f7fe6,#2e67dc) !important;
  color:#fff !important;
  font-size:0 !important;
  font-weight:900 !important;
  position:relative !important;
  line-height:1 !important;
}
.talk-glyph::before{
  content:"•••" !important;
  font-size:14px !important;
  letter-spacing:1px !important;
  transform:translateY(-1px) !important;
}
.talk-glyph::after{
  content:"" !important;
  position:absolute !important;
  left:7px !important;
  bottom:-5px !important;
  border:6px solid transparent !important;
  border-top-color:#3f74e2 !important;
  border-right:0 !important;
  transform:rotate(24deg) !important;
}
.talk-copy h3{
  margin:0 0 7px !important;
  font-size:22px !important;
  letter-spacing:-.03em !important;
}
.talk-copy p{
  margin:0 0 4px !important;
  font-size:15px !important;
  font-weight:800 !important;
  color:#2f5fb6 !important;
}
.talk-copy .talk-hint{
  font-size:14px !important;
  color:var(--muted) !important;
  word-break:keep-all !important;
}
@media(max-width:1100px){
  .talk-grid{grid-template-columns:1fr !important;}
}
@media(max-width:760px){
  nav a{
    font-size:14px !important;
    padding:10px 13px !important;
    font-weight:850 !important;
    letter-spacing:-.01em !important;
  }
  .talk-card{padding:18px !important;}
  .talk-copy h3{font-size:19px !important;}
}


/* v22 popup '오늘 하루 보지 않기' right alignment */
.popup-card .today{
  display:block !important;
  width:auto !important;
  margin:12px 0 0 auto !important;
  padding:0 !important;
  text-align:right !important;
}


/* v23 logo transparency + popup today right */
.logo,
.logo img,
.footer-logo{
  background:transparent !important;
  box-shadow:none !important;
}
.logo{
  padding:0 !important;
  border:0 !important;
}
.popup-card .today,
#today{
  display:block !important;
  width:max-content !important;
  margin:12px 0 0 auto !important;
  padding:0 !important;
  text-align:right !important;
  background:transparent !important;
  border:0 !important;
}


/* v25 mobile nav fix: hide contact nav item in header */
header nav a[href="https://pf.kakao.com/_Xhxdxon"],
.header nav a[href="https://pf.kakao.com/_Xhxdxon"]{
  display:none !important;
}