/* 2028 한완수·한완기 도서 상세 페이지 (scripts/build_book_pages.py). hanwansu-product.css 위에 얹는다.
   색은 과목별 테마: 대수 .hw-m1(청록), 미적분Ⅰ .hw-m2(자주), 확률과 통계 .hw-m3(호박), 실전 20회 .hw-m4(남색). */
.hw-m3{--hw-bg:#f9f6f2;--hw-paper:#fff;--hw-ink:#231e19;--hw-muted:#665c52;--hw-body:#40382f;--hw-accent:#8f4511;--hw-accent-soft:#b8641c14;
 --hw-shape-1:#f1cfa8;--hw-shape-2:#f3e2a6;--hw-shape-3:#c7dcc3;--hw-line:#e9e0d6;--hw-hover-line:#c4b09c;--hw-shadow:#2a1f1566;--hw-shadow-2:#2a1f1559;
 --hw-dark:#2a2016;--hw-on-dark:#f8f4ef;--hw-on-dark-body:#d4c6b6;--hw-on-dark-muted:#b5a594;--hw-on-dark-link:#f0bf8a;--hw-on-dark-line:#4a3b2d;--hw-on-dark-line-2:#3b2f24}
.hw-m4{--hw-bg:#f4f6f9;--hw-paper:#fff;--hw-ink:#1b1f26;--hw-muted:#56606d;--hw-body:#363e49;--hw-accent:#24508f;--hw-accent-soft:#2f63b014;
 --hw-shape-1:#b9cdea;--hw-shape-2:#d5d9e4;--hw-shape-3:#e9d6b8;--hw-line:#dde3eb;--hw-hover-line:#a3b2c6;--hw-shadow:#161d2866;--hw-shadow-2:#161d2859;
 --hw-dark:#161d28;--hw-on-dark:#f2f5f9;--hw-on-dark-body:#bcc6d4;--hw-on-dark-muted:#9eabbc;--hw-on-dark-link:#9ec2f2;--hw-on-dark-line:#323d4d;--hw-on-dark-line-2:#29323f}

.bk-section{padding:var(--section-space) 0}
.bk-section.is-paper{background:var(--hw-paper)}
.bk-section.is-tint{background:var(--hw-bg)}
.bk-section h2{max-width:14em}

/* 이 책의 자리: 시리즈 안에서의 위치 */
.bk-path{list-style:none;padding:0;margin:48px 0 0;display:grid;grid-template-columns:repeat(var(--n,3),minmax(0,1fr));gap:14px}
.bk-path li{display:flex}
.bk-path a,.bk-path div{flex:1;display:flex;flex-direction:column;gap:6px;padding:20px 22px;border:1px solid var(--hw-line);border-radius:var(--ui-radius-selection);background:var(--hw-paper);color:inherit}
.bk-path a:hover{text-decoration:none;border-color:var(--hw-hover-line)}
.bk-path .is-current{border:2px solid var(--hw-accent)}
.bk-path span{font-size:var(--type-note);font-weight:650;color:var(--hw-accent);line-height:var(--leading-body)}
.bk-path strong{font-size:var(--type-body);letter-spacing:normal;line-height:var(--leading-body)}
.bk-path small{font-size:var(--type-note);line-height:var(--leading-body);color:var(--hw-muted)}

/* 특징 목록 */
.bk-features{list-style:none;padding:0;margin:56px 0 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 48px}
.bk-features li{padding:24px 0 26px;border-top:1px solid var(--hw-line)}
.bk-features h3{font-size:var(--type-card);line-height:var(--leading-heading);font-weight:600}
.bk-features p{font-size:var(--type-body);line-height:var(--leading-body);color:var(--hw-body);margin-top:10px}
.bk-counts{display:grid;grid-template-columns:repeat(var(--n,3),minmax(0,1fr));margin:64px 0 0;border-top:1px solid var(--hw-line);border-bottom:1px solid var(--hw-line)}
.bk-counts div{padding:28px 0 32px}
.bk-counts div+div{padding-left:28px;border-left:1px solid var(--hw-line)}
.bk-counts dt{font-size:var(--type-body);font-weight:650;color:var(--hw-body);line-height:var(--leading-body)}
.bk-counts dd{margin:10px 0 0;font-size:var(--type-card);font-weight:600;white-space:nowrap;line-height:var(--leading-heading);font-weight:600}
.bk-counts b{font-size:var(--type-metric);line-height:var(--leading-heading);letter-spacing:var(--tracking-heading);margin-right:4px;font-family:var(--font-display);font-weight:700}

/* 목록(TOPIC·Thema·Part) */
.bk-lists{display:grid;grid-template-columns:repeat(var(--n,3),minmax(0,1fr));gap:0 32px;margin-top:40px}
.bk-list h3{font-size:var(--type-card);padding-top:18px;border-top:4px solid var(--hw-shape-1);line-height:var(--leading-heading);font-weight:600}
.bk-list:nth-child(2) h3{border-top-color:var(--hw-shape-2)}
.bk-list:nth-child(3) h3{border-top-color:var(--hw-shape-3)}
.bk-list ol,.bk-list ul{list-style:none;padding:0;margin:12px 0 0}
.bk-list li{display:flex;gap:10px;font-size:var(--type-body);line-height:var(--leading-body);padding:6px 0;color:var(--hw-body)}
.bk-list li b{flex:none;min-width:1.6em;color:var(--hw-accent);font-weight:650;font-variant-numeric:tabular-nums}
.hw-toc .bk-lists{margin-top:8px}

/* 2028판 지면이 들어갈 자리 */
.bk-slots{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:48px}
.bk-slot{margin:0}
.bk-slot-frame{aspect-ratio:210/297;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:20px;text-align:center;
 border:2px dashed var(--hw-hover-line);border-radius:6px;background:repeating-linear-gradient(135deg,var(--hw-bg) 0 14px,var(--hw-paper) 14px 28px);color:var(--hw-muted)}
.bk-slot-frame strong{font-size:var(--type-body);color:var(--hw-ink);line-height:var(--leading-body)}
.bk-slot-frame span{font-size:var(--type-note);line-height:var(--leading-body)}
.bk-slot figcaption{font-size:var(--type-note);line-height:var(--leading-body);color:var(--hw-muted);margin-top:12px}

/* 함께 보면 좋은 책 */
.bk-related{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:28px 22px;margin-top:44px}
.bk-related a{display:flex;flex-direction:column;gap:6px;color:inherit}
.bk-related a:hover{text-decoration:none}
.bk-related img{width:100%;height:auto;aspect-ratio:248/351;object-fit:cover;background:var(--hw-bg);box-shadow:0 1px 2px #0000001a,0 14px 26px -18px var(--hw-shadow)}
.bk-related span{font-size:var(--type-note);font-weight:650;color:var(--hw-accent);margin-top:8px;line-height:var(--leading-body)}
.bk-related strong{font-size:var(--type-card);line-height:var(--leading-heading);letter-spacing:var(--tracking-heading);font-weight:600}

@media(max-width:1060px){.bk-path{grid-template-columns:repeat(2,minmax(0,1fr))}.bk-lists{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:800px){
 .bk-section{padding:var(--section-space) 0}
 .bk-path,.bk-features,.bk-lists{grid-template-columns:1fr}
 .bk-counts{grid-template-columns:1fr}
 .bk-counts div+div{padding-left:0;border-left:0;border-top:1px solid var(--hw-line)}
 .bk-counts div{padding:20px 0}
 .bk-slots{grid-template-columns:1fr 1fr;gap:14px}
}