:root{
    color-scheme:dark;
    --bg:#0b1118;
    --panel:#121b25;
    --panel-2:#182431;
    --card:#0e1721;
    --line:#2b3a49;
    --line-soft:rgba(145,163,181,.16);
    --text:#ecf3f8;
    --muted:#91a3b5;
    --accent:#64d8c5;
    --accent-hover:#7ae2d0;
    --accent-dark:#082019;
    --good:#56d79a;
    --warn:#ffd166;
    --down:#5eb5ff;
    --shadow:0 14px 34px rgba(0,0,0,.12);
}

/* 2026-09-11: Market에서 이동한 모바일 주식책 화면은 4개 탭만 유지 */
@media(max-width:760px){
    body.market-nav-context .signal-nav a[href^="/lead/"]{display:none!important}
}
*{box-sizing:border-box}
[hidden]{display:none!important}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","Noto Sans KR",sans-serif;letter-spacing:-.015em}
a{color:inherit}
.signal-header{position:sticky;top:0;z-index:900;width:100%;border-bottom:1px solid rgba(255,255,255,.07);background:rgba(15,23,42,.96);backdrop-filter:blur(12px);box-shadow:0 8px 28px rgba(0,0,0,.18)}
.signal-header-inner{width:min(1320px,calc(100% - 44px));max-width:none;min-height:66px;margin:auto;padding:0;display:flex;align-items:center;justify-content:space-between;gap:22px}
.signal-logo{display:inline-flex;align-items:center;flex:0 0 auto;color:inherit;text-decoration:none;font-size:22px;font-weight:950;line-height:1;letter-spacing:-.045em}
.signal-logo b{color:var(--accent)}.signal-logo span{color:#fff}
.signal-nav{display:flex;align-items:center;justify-content:flex-end;gap:8px}
.signal-nav a{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 20px;border:1px solid #344154;border-radius:999px;background:transparent;color:#b8c6d5;text-decoration:none;font-size:14.5px;font-weight:700;line-height:normal;letter-spacing:normal;white-space:nowrap;box-shadow:none;transition:border-color .18s ease,color .18s ease,background .18s ease,transform .18s ease}
.signal-nav a:hover{border-color:var(--accent);background:rgba(100,216,197,.1);color:#fff;transform:translateY(-1px)}
.signal-nav .nav-primary{border-color:var(--accent);background:var(--accent);color:var(--accent-dark)}
.signal-nav .nav-primary:hover{border-color:var(--accent-hover);background:var(--accent-hover);color:var(--accent-dark)}
.books-shell{width:min(1320px,calc(100% - 44px));margin:0 auto;padding:30px 0 50px}
.page-head{margin-bottom:18px}
.page-head-copy{min-width:0}
.affiliate-notice{margin:8px 0 0;color:#8299ad;font-size:11px;line-height:1.55}
.eyebrow,.section-kicker{display:block;margin:0 0 7px;color:var(--accent);font-size:12px;font-weight:800;line-height:normal;letter-spacing:.12em}
.page-head h1{margin:0;font-size:clamp(23px,4vw,38px);font-weight:700;line-height:normal;letter-spacing:normal}
.page-description{margin:9px 0 0;color:var(--muted);font-size:14px;line-height:1.65}
.guide-section,.faq-section{border:1px solid var(--line);border-radius:18px;background:var(--panel);box-shadow:var(--shadow)}
.section-heading h2{margin:0;font-size:22px;line-height:1.35;letter-spacing:-.035em}
.book-section{margin-bottom:18px}
.topic-links{display:flex;flex-wrap:nowrap;gap:8px;margin:0 0 16px;padding:0;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.topic-links::-webkit-scrollbar{display:none}
.topic-links a{--topic-color:#ffe094;--topic-rgb:255,209,102;display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 17px;border:1px solid #344154;border-radius:999px;background:transparent;color:#b8c8d6;text-decoration:none;font-size:13px;font-weight:800;white-space:nowrap;transition:border-color .18s ease,background .18s ease,color .18s ease}.topic-links a:hover{border-color:#506276;background:rgba(145,163,181,.07);color:#eef5fa}
.topic-links a:nth-child(2){--topic-color:#8bcaff;--topic-rgb:94,181,255}
.topic-links a:nth-child(3){--topic-color:#ff9ab1;--topic-rgb:255,111,145}
.topic-links a:nth-child(4){--topic-color:#83e7b5;--topic-rgb:86,215,154}
.topic-links a:nth-child(5){--topic-color:#ffb27d;--topic-rgb:255,155,90}
.topic-links a.is-current{border-color:rgba(var(--topic-rgb),.62);background:rgba(var(--topic-rgb),.1);color:var(--topic-color)}
.section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:16px}.section-heading p{margin:4px 0 0;color:#7f95a8;font-size:11px}
.book-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.book-card{display:grid;grid-template-columns:minmax(210px,40%) minmax(0,60%);min-width:0;overflow:hidden;border:1px solid var(--line);border-radius:18px;background:var(--panel);box-shadow:var(--shadow);color:inherit;text-decoration:none;scroll-margin-top:84px;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.book-card.is-linked{cursor:pointer}
.book-card:nth-child(1){--label:#ffd166;--label-rgb:255,209,102}
.book-card:nth-child(2){--label:#ff6f91;--label-rgb:255,111,145}
.book-card:nth-child(3){--label:#5eb5ff;--label-rgb:94,181,255}
.book-card:nth-child(4){--label:#b9afff;--label-rgb:185,175,255}
.book-card:nth-child(5){--label:#56d79a;--label-rgb:86,215,154}
.book-card:nth-child(6){--label:#ff9b5a;--label-rgb:255,155,90}
.book-card:nth-child(7){--label:#ffd166;--label-rgb:255,209,102}
.book-card:nth-child(8){--label:#ff8f7a;--label-rgb:255,143,122}
.book-card:hover{transform:translateY(-3px);border-color:rgba(var(--label-rgb),.6);box-shadow:0 20px 46px rgba(0,0,0,.23)}
.book-card.is-linked:focus-visible{outline:2px solid var(--label);outline-offset:3px}
.book-card.is-focused{transform:translateY(-2px);border-color:rgba(var(--label-rgb),.9);box-shadow:0 0 0 2px rgba(var(--label-rgb),.2),0 20px 46px rgba(0,0,0,.24)}
.book-cover{position:relative;display:grid;place-items:center;min-height:390px;padding:42px 22px 24px;background:radial-gradient(circle at 50% 38%,rgba(100,216,197,.08),transparent 46%),var(--card);border-right:1px solid var(--line-soft)}
.book-card:nth-child(4) .book-cover{background:radial-gradient(circle at 50% 38%,rgba(185,175,255,.1),transparent 46%),var(--card)}
.book-cover img{display:block;width:min(100%,230px);height:auto;aspect-ratio:2/3;object-fit:contain;filter:drop-shadow(0 16px 18px rgba(0,0,0,.34))}
.book-category{position:absolute;top:15px;left:15px;z-index:1;display:inline-flex;align-items:center;min-height:27px;padding:0 9px;border:1px solid rgba(var(--label-rgb),.58);border-radius:999px;background:rgba(var(--label-rgb),.1);color:var(--label);font-size:11px;font-weight:900;letter-spacing:.02em;backdrop-filter:blur(8px)}
.book-content{display:flex;min-height:390px;flex-direction:column;padding:20px}
.book-content h3{margin:0;color:#f2f7fc;font-size:19px;line-height:1.42;letter-spacing:-.035em}
.book-audience{margin:14px 0 0;padding:10px 11px;border-left:2px solid var(--label);background:rgba(var(--label-rgb),.055)}.book-audience dt{color:var(--label);font-size:11px;font-weight:900}.book-audience dd{margin:4px 0 0;color:#d0dbe4;font-size:13px;line-height:1.5}
.book-summary{margin:12px 0 0;color:#91a5b7;font-size:13px;line-height:1.65}
.book-points{display:flex;flex-wrap:nowrap;gap:4px;margin:14px 0 18px;padding:0;list-style:none}.book-points li{min-width:0;padding:4px 6px;border:1px solid rgba(var(--label-rgb),.34);border-radius:999px;background:rgba(var(--label-rgb),.055);color:var(--label);font-size:13px;letter-spacing:-.045em;white-space:nowrap}
.book-button{display:flex;align-items:center;justify-content:space-between;min-height:48px;margin-top:auto;padding:0 14px;border:1px solid var(--accent);border-radius:11px;background:var(--accent);color:var(--accent-dark);text-decoration:none;font-size:17px;font-weight:850;transition:border-color .18s ease,background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease}.book-card.is-linked:hover .book-button,.book-card.is-linked:focus-visible .book-button{border-color:var(--accent-hover);background:var(--accent-hover)}.book-button span{font-size:28px;line-height:1;transition:transform .18s ease}
@media(hover:hover) and (pointer:fine){.book-card.is-linked .book-button:hover{border-color:var(--accent-hover);background:var(--accent-dark);color:var(--accent-hover);transform:translateY(-2px);box-shadow:0 8px 18px rgba(100,216,197,.16)}.book-card.is-linked .book-button:hover span{transform:translateX(3px)}}
.book-button.is-disabled{justify-content:center;border-color:#2b3a49;background:#182431;color:#788b9c;cursor:not-allowed}
.guide-section{margin-bottom:14px;padding:22px}.guide-section .section-kicker{color:#65dcae}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.guide-grid article{padding:18px;border:1px solid #23384b;border-radius:14px;background:#09141f}.guide-grid article:nth-child(1){border-top:2px solid #a899ff}.guide-grid article:nth-child(2){border-top:2px solid #ffb45f}.guide-grid article:nth-child(3){border-top:2px solid #5ed9a8}.guide-grid article>span{color:#5ba4f4;font-size:11px;font-weight:900}.guide-grid article:nth-child(1)>span{color:#b9afff}.guide-grid article:nth-child(2)>span{color:#ffc47a}.guide-grid article:nth-child(3)>span{color:#7fe4ba}.guide-grid h3{margin:9px 0 7px;font-size:17px}.guide-grid p{margin:0;color:#9eb0c0;font-size:12px;line-height:1.7}.guide-grid a{display:inline-block;margin-top:13px;color:#8cc2ff;font-size:11px;font-weight:850;text-decoration:none}.guide-grid a:hover{text-decoration:underline}
.faq-section{padding:22px}.faq-section .section-kicker{color:var(--accent)}.faq-list{display:grid;gap:8px}.faq-list details{border:1px solid #2b3a49;border-radius:12px;background:var(--card)}.faq-list summary{position:relative;padding:15px 44px 15px 15px;color:#dce8f2;font-size:14px;font-weight:800;line-height:1.45;cursor:pointer;list-style:none}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";position:absolute;top:50%;right:16px;transform:translateY(-50%);color:var(--accent);font-size:19px;font-weight:500}.faq-list details[open] summary:after{content:"−"}.faq-list details p{margin:0;padding:0 15px 16px;color:#96aabb;font-size:12px;line-height:1.75}.faq-list details p strong{color:var(--warn)}
.books-footer{padding:24px 4px 0;color:#647d91;font-size:11px;line-height:1.65;text-align:center}.books-footer p{margin:4px 0}
@media(max-width:1100px){.book-grid{grid-template-columns:1fr}.book-card{grid-template-columns:minmax(220px,38%) minmax(0,62%)}.book-cover{min-height:360px}.book-content{min-height:360px}.guide-grid{grid-template-columns:1fr}}
@media(max-width:720px){
    .signal-header-inner{width:min(1320px,calc(100% - 20px));max-width:none;min-height:58px;margin:auto;padding:0 8px 0 7px;gap:6px}
    .signal-logo{font-size:20px}
    .signal-nav{gap:4px}
    .signal-nav a{min-height:32px;padding:0 8px;border-radius:999px;font-size:12px}
    .books-shell{width:100%;max-width:1320px;margin:0 auto;padding:18px 10px 32px}
    .page-head{display:block;margin-bottom:14px;padding:0}.eyebrow{margin-bottom:7px;font-size:12px}.page-head h1{font-size:23px;font-weight:700}.page-description{margin-top:7px;font-size:10px;line-height:1.5}
    .topic-links{gap:6px;margin:0 0 12px;padding:0}.topic-links a{min-height:36px;padding:0 13px;border-radius:999px;font-size:12px}
    .section-heading{display:block;margin:0 0 11px}.section-heading p{margin-top:6px;line-height:1.5}
    .book-grid{grid-template-columns:1fr;gap:10px}.book-card{grid-template-columns:minmax(145px,40%) minmax(0,60%);border-radius:15px;scroll-margin-top:62px}.book-card:hover{transform:none}.book-cover{min-height:100%;padding:42px 14px 18px}.book-cover img{width:100%;max-width:190px;height:auto;aspect-ratio:2/3}.book-category{top:11px;left:10px;min-height:24px;padding:0 7px;font-size:9px}.book-content{min-height:0;padding:15px}.book-content h3{font-size:16px;line-height:1.4}.book-audience{margin-top:10px;padding:8px 9px}.book-audience dt{font-size:10px}.book-audience dd{font-size:11px;line-height:1.5}.book-summary{margin-top:9px;font-size:11px;line-height:1.55}.book-points{gap:3px;margin:10px 0 13px}.book-points li{padding:3px 4px;font-size:8.5px}.book-button{min-height:40px;padding:0 11px;font-size:13px}
    .guide-section,.faq-section{padding:16px;border-radius:15px}.guide-grid{gap:7px}.guide-grid article{padding:14px}.faq-list details:nth-child(3){display:none}.faq-list summary{padding:14px 40px 14px 13px;font-size:12px}.faq-list details p{padding:0 13px 14px;font-size:11px}.books-footer{font-size:10px}
}
@media(max-width:420px){.book-card{grid-template-columns:minmax(132px,40%) minmax(0,60%)}.book-cover{padding-right:10px;padding-left:10px}.book-cover img{max-width:165px}.book-content{padding:13px}.signal-logo{font-size:20px}.signal-nav a{padding:0 8px;font-size:12px}}
@media(max-width:350px){.book-card{grid-template-columns:minmax(118px,40%) minmax(0,60%)}.book-cover img{max-width:145px}.signal-nav{gap:3px}.signal-nav a{padding:0 6px;font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.book-card,.book-button,.signal-nav a{transition:none}}