.nslp{--nslp-blue:#1264e8;--nslp-ink:#102044;--nslp-line:#dce5f0;max-width:1160px;margin:24px auto;color:var(--nslp-ink);line-height:1.7}.nslp *{box-sizing:border-box}.nslp-hero{padding:28px;border:1px solid var(--nslp-line);border-radius:18px;background:linear-gradient(120deg,#eef5ff,#fff)}.nslp-badge{display:inline-block;border-radius:20px;background:#e8f2ff;color:#092b67;padding:4px 12px;font-size:13px;font-weight:700}.nslp-actions{display:flex;gap:12px;flex-wrap:wrap;padding:24px 0}.nslp-button,.nslp-unavailable{display:inline-block;padding:11px 16px;border-radius:9px;font-size:14px;font-weight:700}.nslp .nslp-button{background:var(--nslp-blue);color:#fff;text-decoration:none}.nslp-button:focus-visible,.nslp-topic-nav a:focus-visible{outline:3px solid #f5b51b;outline-offset:4px}.nslp-unavailable{background:#f1f5f9;color:#65738b}.nslp-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.nslp-card,.nslp-topic{border:1px solid var(--nslp-line);padding:24px;border-radius:16px;background:#fff}.nslp-card h2{font-size:22px}.nslp-topic{margin-top:24px;scroll-margin-top:100px}.nslp-topic h2{font-size:26px}.nslp-topic img{max-width:100%;height:auto}.nslp-topic-nav{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}.nslp-topic-nav a{padding:8px 12px;background:#eef5ff;border-radius:8px;color:#092b67}.nslp p{overflow-wrap:anywhere}.nslp table{width:100%;display:block;overflow:auto}@media(max-width:820px){.nslp-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:640px){.nslp{margin:16px 0}.nslp-grid{grid-template-columns:1fr}.nslp-card,.nslp-topic,.nslp-hero{padding:18px}.nslp-actions>*{width:100%;text-align:center}}
.nslp-single .entry-title{font-size:clamp(28px,4vw,44px);line-height:1.2;margin:24px 0;overflow-wrap:anywhere}.nslp-single .entry-header{padding-top:24px;padding-bottom:12px}.nslp h2,.nslp h3{line-height:1.3;margin:20px 0 12px}.nslp h3{font-size:22px}.nslp-breadcrumb{margin:0 0 24px;overflow-wrap:anywhere}.nslp-breadcrumb a{color:#092b67;text-decoration:underline}.nslp .nslp{margin:0}.nslp-card h3{margin-top:0}.nslp-topic-nav a{overflow-wrap:anywhere;max-width:100%}@media(max-width:640px){.nslp-single .entry-title{font-size:28px}.nslp-topic h2{font-size:23px}.nslp h3{font-size:20px}.nslp-topic-nav{flex-direction:column}}
.nslp h2 + .nslp-actions{padding-top:8px}.nslp-book-label{font-weight:700;color:#092b67}.nslp-hero p:empty{display:none}
/* Prototype-only spacing; verify against Tutor Starter on staging. */
.nslp-single .entry-header{margin-bottom:24px;padding-bottom:0;min-height:0}
.nslp-single .entry-content{margin-top:0;padding-top:0}
.nslp h2{font-size:clamp(24px,3vw,30px)}
.nslp .nslp-card h2{font-size:22px}
.nslp .nslp-topic h2{font-size:26px}
@media(max-width:640px){.nslp .nslp-topic h2{font-size:23px}.nslp-single .entry-header{margin-bottom:16px}}
.nslp [hidden]{display:none!important}.nslp-quiz-question{border:1px solid #dce5f0;border-radius:12px;padding:20px;margin:24px 0;min-width:0}.nslp-quiz-question legend{font-weight:700;font-size:18px;padding:0 6px;max-width:100%}.nslp-quiz-question label{display:block;padding:10px;cursor:pointer;overflow-wrap:anywhere}.nslp-quiz-question input{margin-right:8px}.nslp-quiz-question p{background:#eef5ff;padding:12px;border-radius:8px}.nslp [role=status]:not(:empty){background:#eef5ff;border:2px solid #1264e8;padding:18px;margin:20px 0;font-weight:700}.nslp button.nslp-button{border:0;cursor:pointer}

/* NSL Physical Science library — 2026-10-29 */
.nsl-ps{font-family:Arial,'Noto Sans Bengali',sans-serif;color:#172d4d;font-size:19px;line-height:1.75;max-width:1160px;margin:auto;padding:24px 8px}.nsl-ps *{box-sizing:border-box;min-width:0}.nsl-ps h1{font-size:clamp(30px,4vw,43px);line-height:1.3;color:#082b62;margin:12px 0}.nsl-ps h2{font-size:27px;line-height:1.4;color:#082b62}.nsl-ps h3{font-size:23px;line-height:1.5}.nsl-ps p,.nsl-ps li{font-size:19px;line-height:1.8}.nsl-ps a{overflow-wrap:anywhere}.nsl-ps nav{font-size:16px;line-height:1.8}.nsl-ps nav a{display:inline-block;padding:6px 0}.nsl-ps-hero{background:#edf6ff;border:1px solid #d1e4fa;border-radius:20px;padding:28px;margin:20px 0 26px}.nsl-ps-label{font-size:16px!important;font-weight:700;color:#235891}.nsl-ps-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(280px,1fr);gap:26px;align-items:start}.nsl-ps-side{border:1px solid #d7e3ef;padding:22px;border-radius:18px;background:#f8fbff;position:sticky;top:36px}.nsl-ps-side h2{margin-top:0}.nsl-ps-tools{display:grid;gap:12px}.nsl-ps-tools a,.nsl-ps-button{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:52px;padding:13px 16px;border:1px solid #bfd8f5;border-radius:12px;background:white;color:#092b67;text-decoration:none;font-size:18px;font-weight:700;line-height:1.5}.nsl-ps-tools a:hover,.nsl-ps-button:hover{background:#e3f0ff}.nsl-ps a:focus-visible,.nsl-ps summary:focus-visible{outline:3px solid #1264e8;outline-offset:4px}.nsl-ps .nslp{font-size:19px;line-height:1.8;padding:0;max-width:none}.nsl-ps .nslp-grid{display:grid!important;grid-template-columns:minmax(0,1fr)!important;gap:16px}.nsl-ps .nslp-card{padding:22px;border:1px solid #d6e3f1;border-radius:16px;background:white}.nsl-ps .nslp-card h2{font-size:24px;line-height:1.5;margin:12px 0}.nsl-ps .nslp-card p{font-size:19px}.nsl-ps .nslp-badge,.nsl-ps .nslp-book-label{font-size:16px!important;line-height:1.7!important}.nsl-ps .nslp-card a{display:inline-flex;align-items:center;min-height:48px;font-size:18px;padding:10px 16px}.nsl-ps-guide{scroll-margin-top:30px;padding:26px;border:1px solid #d6e3f1;border-radius:18px;margin-top:24px;background:#fff}.nsl-ps-guide h2{margin-top:0}.nsl-ps-note{background:#fff8e8;padding:18px;border-left:4px solid #c58919;border-radius:8px}.nsl-ps-premium{background:#edf5ff;padding:24px;border:1px solid #c9ddf6;border-radius:16px;margin-top:24px}.nsl-ps ul{padding-left:24px}.nsl-ps-footer{margin-top:26px}.nsl-ps summary{cursor:pointer;font-size:19px;font-weight:700;padding:12px 0;min-height:48px}@media(max-width:767px){.nsl-ps{padding:16px 0;font-size:19px}.nsl-ps-layout{display:flex;flex-direction:column;gap:20px}.nsl-ps-side{order:-1;position:static;width:100%;padding:18px}.nsl-ps-chapters{width:100%}.nsl-ps-tools{grid-template-columns:minmax(0,1fr)}.nsl-ps h1{font-size:31px}.nsl-ps h2{font-size:26px}.nsl-ps .nslp-card h2{font-size:23px}.nsl-ps-hero,.nsl-ps-guide,.nsl-ps-premium{padding:20px}.nsl-ps nav{font-size:17px}.nsl-ps .nslp-card{padding:19px}.nsl-ps p,.nsl-ps li{font-size:19px!important;line-height:1.85!important}.nsl-ps-tools a,.nsl-ps-button{font-size:18px;min-height:54px}}
body:has(.nsl-ps) .site-branding a{font-size:23px!important;font-weight:750!important;line-height:1.3!important}body:has(.nsl-ps) .site-footer{font-size:17px;line-height:1.7}
.nslp-single:has(.nsl-ps-chapter) .entry-title{font-size:clamp(29px,4vw,42px);line-height:1.45;word-break:normal;overflow-wrap:break-word}.nslp-single:has(.nsl-ps-chapter) .nslp{font-size:19px;line-height:1.85}.nslp-single:has(.nsl-ps-chapter) .nslp p{font-size:19px;line-height:1.85}.nslp-single:has(.nsl-ps-chapter) .nslp-badge,.nslp-single:has(.nsl-ps-chapter) .nslp-book-label{font-size:16px}.nslp-single:has(.nsl-ps-chapter) .nslp-button{font-size:18px;min-height:50px;display:inline-flex;align-items:center;justify-content:center}.nslp-single:has(.nsl-ps-chapter) .nslp-unavailable{display:none}.nslp-single:has(.nsl-ps-chapter) .nslp-breadcrumb{font-size:17px;line-height:1.8}.nslp-single:has(.nsl-ps-chapter) .nslp-breadcrumb a{display:inline-block;padding:8px 0}.nsl-ps-chapter{padding-top:0}