/* 이러닝 콘텐츠 개발 — 콘텐츠 제작 기법 (탭 + 미리보기 카드)
   문구·이미지: 기존 홈페이지(sangs.co.kr) 자료 / 이미지는 assets/produce-1~8.webp 교체로 변경 가능 */
.pd{--c:#2A5FE0;--c2:#E4ECFF;--ink:#14234B;--mut:#5F6E8C;word-break:keep-all}
.pd-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:8px;border-radius:22px;background:rgba(255,255,255,.7);border:1px solid #E4EAF5;box-shadow:0 10px 26px rgba(80,105,200,.07)}
.pd-tabs button{display:flex;align-items:center;justify-content:center;gap:8px;height:50px;border:0;border-radius:15px;background:transparent;font:inherit;font-size:15.5px;font-weight:700;color:#4A5C80;cursor:pointer;transition:background .3s,color .3s,box-shadow .3s}
.pd-tabs button i{font-style:normal;font-size:11.5px;font-weight:800;letter-spacing:.04em;color:#9AABCF;transition:color .3s}
.pd-tabs button:hover{background:#F1F5FF;color:var(--ink)}
.pd-tabs button.on{background:var(--c);color:#fff;box-shadow:0 10px 22px rgba(42,95,224,.28)}
.pd-tabs button.on i{color:rgba(255,255,255,.75)}
.pd-tabs button:focus-visible{outline:2px solid var(--c);outline-offset:2px}

.pd-stage{position:relative;margin-top:22px}
.pd-pane{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:44px;align-items:center;padding:30px;border-radius:28px;background:#fff;border:1px solid #E4EAF5;box-shadow:0 18px 44px rgba(80,105,200,.1)}
.pd-pane[hidden]{display:none}
.pd-pane.on{animation:pdIn .6s cubic-bezier(.33,0,.15,1) both}
@keyframes pdIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.pd-shot{margin:0;border-radius:18px;overflow:hidden;aspect-ratio:16/9;background:#EEF2FA;box-shadow:0 12px 28px rgba(20,35,75,.12)}
.pd-shot img{display:block;width:100%;height:100%;object-fit:cover;transition:transform 1.2s cubic-bezier(.33,0,.15,1)}
.pd-pane.on .pd-shot img{animation:pdZoom 1.2s cubic-bezier(.33,0,.15,1) both}
@keyframes pdZoom{from{transform:scale(1.05)}to{transform:none}}
.pd-txt small{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.14em;color:var(--c);background:var(--c2);padding:5px 11px;border-radius:99px}
.pd-txt h3{margin:14px 0 0;font-size:clamp(24px,2.2vw,30px);letter-spacing:-.04em;color:var(--ink)}
.pd-desc{margin:14px 0 0;padding-bottom:22px;border-bottom:1px solid #E6ECF6;font-size:16px;line-height:1.75;color:#3E4E70}
.pd-txt dl{margin:20px 0 0;display:grid;gap:12px}
.pd-txt dl>div{display:grid;grid-template-columns:58px 1fr;gap:12px;align-items:baseline}
.pd-txt dt{display:inline-flex;justify-content:center;font-size:12.5px;font-weight:800;color:var(--c);background:var(--c2);border-radius:8px;padding:5px 0}
.pd-txt dd{margin:0;font-size:15px;line-height:1.7;color:var(--mut)}

.pd-arrow{position:absolute;top:50%;z-index:2;display:grid;place-items:center;width:48px;height:48px;margin-top:-24px;border:1px solid #E4EAF5;border-radius:50%;background:#fff;color:var(--ink);cursor:pointer;box-shadow:0 10px 24px rgba(20,35,75,.12);transition:background .25s,color .25s,transform .25s}
.pd-arrow svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.pd-prev{left:-24px}.pd-next{right:-24px}.pd-next svg{transform:scaleX(-1)}
.pd-arrow:hover{background:var(--c);color:#fff;transform:scale(1.06)}
.pd-dots{display:none;justify-content:center;gap:6px;margin-top:16px}
.pd-dots i{width:7px;height:7px;border-radius:99px;background:#CFD9EE;transition:width .3s,background .3s}
.pd-dots i.on{width:22px;background:var(--c)}

@media(max-width:1000px){
 .pd-tabs{display:flex;overflow-x:auto;scrollbar-width:none;padding:6px}
 .pd-tabs::-webkit-scrollbar{display:none}
 .pd-tabs button{flex:none;padding:0 16px;height:44px;font-size:14.5px}
 .pd-pane{grid-template-columns:1fr;gap:24px;padding:20px}
 .pd-arrow{display:none}
 .pd-dots{display:flex}
}
@media(prefers-reduced-motion:reduce){.pd-pane.on,.pd-pane.on .pd-shot img{animation:none}}