/* 마스터북 상세 v8 */
.gc{--g:#1f9d55;--gd:#166534;--ink:#111;--gray:#5f6b64;--line:#e5ebe7;--red:#dc2626;color:var(--ink);text-align:center}
.gc-wrap{width:calc(100% - 48px);max-width:1080px;margin:auto}
.gc-sec{padding:100px 0}
.gc-mint{background:linear-gradient(180deg,#f3faf6,#e8f5ed);border-block:1px solid #dcefe3}
.gc h2{font-size:clamp(28px,4vw,44px);font-weight:900;line-height:1.3;letter-spacing:-.045em;text-wrap:balance}
.gc .g{color:var(--g)}.gc .r{color:var(--red)}
.gc-eye{display:inline-block;font-size:14px;font-weight:800;color:var(--g);background:#fff;border:1px solid #cfe9d9;padding:6px 14px;border-radius:999px;margin-bottom:16px}
.gc-note{margin-top:16px;font-size:13.5px;line-height:1.7;color:#8a968c;text-wrap:pretty}
.gc-note a{color:var(--g);font-weight:800}
.gc-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:56px;padding:0 30px;border:0;border-radius:999px;background:var(--g);color:#fff;font:inherit;font-size:17px;font-weight:800;cursor:pointer;box-shadow:0 14px 32px #1f9d5540;transition:transform .2s}
.gc-btn:hover{transform:translateY(-3px)}
.gc-btn.line{background:#fff;color:var(--gd);border:1.5px solid #bfe3cd;box-shadow:none}
.gc-ghost{display:inline-flex;align-items:center;min-height:56px;padding:0 26px;border-radius:999px;border:1.5px solid #d4dcd7;font-weight:800;color:var(--ink)}
/* 히어로 */
.gc-hero{padding:64px 0 80px;background:linear-gradient(180deg,#fff,#f3faf6);text-align:left}
.gc-hero-in{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.gc-tag{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:800;color:#03a64a;background:#fff;border:1px solid #bbf7d0;padding:6px 14px 6px 6px;border-radius:999px}
.gc-tag i{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:7px;background:#03c75a}
.gc-tag svg{width:11px;height:11px;fill:#fff}
.gc-hero h1{margin-top:18px;font-size:clamp(34px,5vw,58px);font-weight:900;line-height:1.25;letter-spacing:-.05em;text-wrap:balance}
.gc-lead{margin-top:18px;font-size:17px;line-height:1.8;color:var(--gray);text-wrap:pretty}
.gc-lead b{color:var(--ink)}
.gc-cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}
.gc-chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}
.gc-chips span{font-size:13.5px;font-weight:700;color:#4b5550;background:#fff;border:1px solid var(--line);padding:6px 12px;border-radius:999px}
.gc-hero-book{position:relative;justify-self:center;width:min(340px,80%)}
.gc-hero-book img{width:100%;border-radius:10px;box-shadow:0 34px 70px #0000004d;transform:perspective(1200px) rotateY(-12deg)}
.gc-seal{position:absolute;right:-14px;top:-14px;width:84px;height:84px;border-radius:50%;background:var(--red);color:#fff;font-size:26px;font-weight:900;display:flex;align-items:center;justify-content:center;box-shadow:0 12px 26px #dc262666;transform:rotate(10deg)}
.gc-seal small{font-size:14px}
/* 고민 */
.gc-pains{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:44px;text-align:left}
.gc-pains div{background:#fff;border:1px solid #dcefe3;border-radius:22px;padding:26px 22px;box-shadow:0 14px 34px #1f9d5512}
.gc-pains img{width:52px;height:52px;margin-bottom:12px;filter:drop-shadow(0 6px 8px #0000001f)}
.gc-pains b{display:block;font-size:19px;font-weight:900;letter-spacing:-.04em;line-height:1.4}
.gc-pains p{margin-top:8px;font-size:15px;line-height:1.7;color:var(--gray)}
/* 두 권 + 목차 */
.gc-two{display:grid;grid-template-columns:1fr auto 1fr;gap:16px;align-items:center;margin-top:40px;text-align:left}
.gc-two article{display:flex;gap:18px;align-items:center;background:#fff;border:2px solid var(--g);border-radius:22px;padding:18px}
.gc-two article.paid{border-color:var(--ink)}
.gc-two img{width:84px;border-radius:6px;box-shadow:0 10px 20px #00000033}
.gc-two .bd{display:inline-block;font-size:12.5px;font-weight:800;padding:4px 10px;border-radius:999px;background:#dcfce7;color:var(--gd)}
.gc-two .paid .bd{background:#f4f4f5;color:#3f3f46}
.gc-two h3{margin-top:6px;font-size:21px;font-weight:900;letter-spacing:-.04em}
.gc-two p{margin-top:4px;font-size:14.5px;color:var(--gray)}
.gc-two .plus{font-size:26px;color:var(--g);font-weight:900}
.gc-toc{margin-top:22px;text-align:left}
.gc-toc details{background:#fff;border:1px solid var(--line);border-radius:22px;padding:6px 22px 18px;box-shadow:0 14px 34px #0000000a}
.gc-toc summary{cursor:pointer;padding:14px 0;font-size:16px;font-weight:900;color:var(--gd)}
/* 성과 */
.gc-dark{background:linear-gradient(180deg,#0f2419d1,#0f2419b8 45%,#0f2419e6),url(../assets/apply-bg-ebook.webp) center/cover no-repeat,#0f2419;color:#fff;border:0}
.gc-dark .gc-eye{color:#fff;background:#ffffff1f;border-color:#ffffff38}
.gc-dark h2{color:#fff}.gc-dark .r{color:#ff6b6b}
.gc-big{margin-top:18px;font-size:clamp(56px,9vw,100px);font-weight:900;letter-spacing:-.05em;line-height:1;color:#ff4d4d}
.gc-big small{font-size:.4em;color:#fff}
.gc-sub{margin-top:8px;font-size:15px;color:#ffffffb3}
.gc-shot{display:block;margin:26px auto 0;max-width:900px;background:#fff;border-radius:14px;padding:8px;box-shadow:0 20px 44px #0000004d;cursor:zoom-in}
.gc-shot img{width:100%;border-radius:8px}
.gc-more{margin-top:18px}
.gc-more summary{cursor:pointer;font-weight:800;color:#86efac}
.gc-pair{display:grid;gap:10px}
.gc-dark .gc-note{color:#ffffff99}
/* 후기 */
.gc-reviews{columns:2;column-gap:14px;margin-top:36px}
.gc-reviews .gc-shot{break-inside:avoid;margin:0 0 14px;box-shadow:0 12px 28px #0000001a}
/* 혜택 */
.gc-bens{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:40px;text-align:left}
.gc-bens div{background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px 22px;box-shadow:0 14px 34px #0000000a}
.gc-bens b{font-size:18px;font-weight:900}
.gc-bens p{margin-top:8px;font-size:15px;line-height:1.7;color:var(--gray)}
.gc-bens a{display:inline-block;margin-top:12px;padding:6px 0;font-weight:800;color:var(--g)}
/* FAQ */
.gc-faq{max-width:760px;text-align:left}
.gc-faq h2{font-size:24px}
.gc-faq .faq-list details{border-bottom:1px solid var(--line);background:none}
.gc-faq .faq-list summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:12px;padding:16px 2px;font-size:16px;font-weight:800}
.gc-faq .faq-list summary::-webkit-details-marker{display:none}
.gc-faq .faq-list summary:after{content:"+";color:var(--g);font-size:20px;line-height:1}
.gc-faq .faq-list details[open] summary:after{content:"−"}
.gc-faq .answer{padding:0 2px 16px;color:var(--gray);font-size:15px;line-height:1.8}
/* 구매 */
.gc-buy{background:#fff}
.gc-cards{display:grid;grid-template-columns:1fr 1.15fr;gap:16px;margin:40px auto 0;max-width:820px;text-align:left}
.gc-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:26px;padding:28px 26px;box-shadow:0 16px 40px #0000000d}
.gc-card.main{border:2px solid var(--ink);box-shadow:0 24px 54px #0000001f}
.gc-card .bd{font-size:12.5px;font-weight:800;color:var(--gray)}
.gc-card h3{margin-top:6px;font-size:22px;font-weight:900;letter-spacing:-.04em}
.gc-card .price{margin-top:6px;font-size:44px;font-weight:900;letter-spacing:-.04em;color:var(--g)}
.gc-card.main .price{color:var(--red)}
.gc-card .price small{font-size:18px;color:var(--ink)}
.gc-card>p{font-size:15px;color:var(--gray)}
.gc-card ol{margin:10px 0 0 18px;font-size:14.5px;line-height:1.9;color:var(--gray)}
.gc-card .gc-btn{margin-top:auto;width:100%}
.gc-card>*:last-child{margin-top:20px}
/* 모바일 */
body[data-page=master] .mobile-bar{display:none!important}
@media(max-width:900px){
 .gc-sec{padding:72px 0}.gc-wrap{width:calc(100% - 32px)}
 .gc-hero{padding:36px 0 56px;text-align:center}
 .gc-hero-in{grid-template-columns:1fr;gap:30px}
 .gc-hero-book{order:-1;width:200px}.gc-hero-book img{transform:none}.gc-seal{width:64px;height:64px;font-size:20px}
 .gc-cta,.gc-chips{justify-content:center}
 .gc-lead br{display:none}
 .gc-pains,.gc-bens,.gc-cards{grid-template-columns:1fr}
 .gc-two{grid-template-columns:1fr}.gc-two .plus{transform:rotate(90deg);justify-self:center}
 .gc-reviews{columns:1}
 body[data-page=master] .mobile-bar{display:flex!important;gap:8px}body[data-page=master] .mobile-bar>*{flex:1}body[data-page=master] footer{padding-bottom:96px}
 footer a,footer p,footer span,footer summary{font-size:12.5px!important}footer a{display:inline-block;padding:10px 2px}
}
/* 개선 전·후 바로 보기 */
.gc-ba-t{margin-top:56px;font-size:clamp(20px,2.6vw,26px);font-weight:900;letter-spacing:-.04em;color:#fff}
.gc-ba{display:grid;gap:10px;margin:22px auto 0;max-width:900px;text-align:left}
.gc-ba figure{margin:0}
.gc-ba figcaption{display:inline-block;margin-bottom:8px;font-size:14px;font-weight:800;padding:5px 14px;border-radius:999px;background:#ffffff26;color:#fff}
.gc-ba .af figcaption{background:#ff4d4d}
.gc-ba .af .gc-shot{outline:3px solid #ff4d4d}
.gc-ba .gc-shot{margin:0}
.gc-ba-arrow{justify-self:center;font-size:28px;font-weight:900;color:#ff6b6b}
/* 첫 화면을 화면 끝까지 채움 */
.gc-hero{min-height:calc(100svh - 72px);display:flex;align-items:center;padding:48px 0}
.gc-hero-in{width:calc(100% - 48px);max-width:1200px}
.gc-hero h1{font-size:clamp(38px,5.4vw,68px)}
.gc-lead{font-size:18.5px}
.gc-hero-book{width:min(400px,90%)}
@media(max-width:900px){.gc-hero{min-height:auto;padding:32px 0 56px}.gc-hero h1{font-size:clamp(30px,8vw,40px)}.gc-lead{font-size:16px}.gc-hero-book{width:210px}}
@media(max-width:900px){.gc-big{font-size:48px;white-space:nowrap}.gc-toc .tc,.gc-toc .tc *,.gc-toc .tc-book,.gc-toc .tc-book *{font-size:12.5px!important}.gc-note a,.gc-reviews+.gc-note a{display:inline-block;padding:10px 2px}}
@media(max-width:420px){.gc-big{font-size:40px!important}}