.quizrank-img,.free-premium-section,.free-chapters-showcase{padding:60px 0;}
.quizrank-img__header,.free-premium-section__header,.free-chapters-showcase__header{text-align:center;max-width:780px;margin:0 auto 40px;}
.quizrank-img__header .section-subtitle,.free-premium-section__header .section-subtitle,.free-chapters-showcase__header .section-subtitle{margin:16px auto 0;}
.quizrank-img__header .section-title span,.free-chapters-showcase__header .section-title span{color:#1565c0;}
.quizrank-img .quizrankSwiper{overflow:hidden;padding-bottom:0;}
.quizrank-img .swiper-slide img{display:block;width:100%;height:auto;border-radius:10px;}
.quizrank-img .quizrank-pagination{position:static!important;transform:none!important;width:100%!important;margin-top:22px;min-height:16px;display:flex;align-items:center;justify-content:center;gap:8px;}
.quizrank-pagination .swiper-pagination-bullet{margin:0!important;width:8px;height:8px;background:#c6ccd3;opacity:1;}
.quizrank-pagination .swiper-pagination-bullet-active{width:30px;border-radius:8px;background:#1565c0;}
.free-premium-section{background:linear-gradient(135deg,#f5faff 0%,#eef6ff 65%,#fff8f2 100%);}
.free-premium-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;max-width:none;margin:auto;align-items:stretch;}
.free-premium-card{position:relative;background:#fff;border:1px solid #d5e4fa;border-radius:26px;padding:34px;box-shadow:0 20px 45px #0d47841a;overflow:hidden;}
.free-premium-card--premium{border:1px solid #2378ca;background:linear-gradient(135deg,#123e83,#1765c0 65%,#2989eb);box-shadow:0 24px 48px #0d478433;color:#fff;}
.free-premium-card__top{display:flex;align-items:center;gap:16px;margin-bottom:28px;}
.free-premium-card__icon{width:54px;height:54px;flex-shrink:0;display:grid;place-items:center;border-radius:16px;background:#eaf3ff;color:#1565c0;font-size:26px;}
.free-premium-card--premium .free-premium-card__icon{background:#ff9400;color:#fff;}
.free-premium-card__eyebrow{display:block;font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#657795;margin-bottom:6px;}
.free-premium-card__top h3{font-size:28px;margin:0;line-height:1.2;}
.free-premium-card__top h3 span{display:block;font-size:14px;font-weight:500;margin-top:5px;}
.free-premium-card__ribbon{position:absolute;right:22px;top:20px;padding:8px 14px;border-radius:30px;background:#ffffff29;color:#fff;text-transform:uppercase;font-weight:700;font-size:12px;}
.free-premium-list{list-style:none;padding:0;margin:0;display:grid;gap:12px;}
.free-premium-list li{display:flex;gap:12px;align-items:flex-start;color:#42536b;font-size:15px;line-height:1.65;}
.free-premium-list li>i{display:grid;place-items:center;flex-shrink:0;width:14px;height:24px;background:transparent;color:#0da76d;font-size:14px;margin-top:2px;}
.free-premium-card--premium .free-premium-list li>i{background:transparent;color:#83edbe;}
.free-premium-list small{display:block;color:#8190a7;}
.free-premium-card__cta{margin-top:30px;display:flex;justify-content:center;gap:12px;}
.free-chapter-cards{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:20px;}
.free-chapter-card{position:relative;display:flex;flex-direction:column;align-items:flex-start;min-height:255px;padding:24px;background:#fff;border:1px solid #d5e4fa;border-radius:20px;box-shadow:0 8px 24px #0d47840a;text-decoration:none;color:#142238;transition:transform .2s,box-shadow .2s;}
.free-chapter-card:hover{transform:translateY(-5px);box-shadow:0 14px 30px #0d47841a;}
.free-chapter-card__number{font-size:11px;font-weight:800;letter-spacing:1px;color:#7c8ba2;margin-bottom:20px;}
.free-chapter-card__icon{width:54px;height:54px;display:grid;place-items:center;border-radius:14px;font-size:24px;margin-bottom:18px;}
.free-chapter-card__icon--science{background:#e9f8ee;color:#168e46;}.free-chapter-card__icon--math{background:#e8f1ff;color:#1565c0;}.free-chapter-card__icon--social{background:#fff2df;color:#dd8100;}.free-chapter-card__icon--hindi{background:#fff0f6;color:#cc1575;}.free-chapter-card__icon--english{background:#f2ebff;color:#7835d6;}
.free-chapter-card h3{font-size:18px;line-height:1.4;margin:0 0 8px;}.free-chapter-card h3+span{font-size:13px;color:#6b7e99;}.free-chapter-card__arrow{position:absolute;right:20px;top:24px;font-size:13px;color:#8291a6;}
@media(max-width:1024px){.free-chapter-cards{grid-template-columns:repeat(3,minmax(0,1fr));}}
@media(max-width:767px){.quizrank-img,.free-premium-section,.free-chapters-showcase{padding:48px 0;}.free-premium-grid{grid-template-columns:1fr;}.free-premium-card{padding:28px 22px;}.free-chapter-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}.free-chapter-card{padding:20px 16px;}.free-chapter-card h3{font-size:16px;}}
@media(max-width:380px){.free-chapter-cards{grid-template-columns:1fr;}}

.free-premium-section__header .section-label{display:inline-block;background:#deecfc;border-radius:30px;padding:10px 22px;}
.free-premium-section__header .section-label i{display:none;}
.free-premium-card--free .free-premium-card__top h3{color:#3cb967;}
.free-premium-card--premium .free-premium-card__top{margin-top:10px;}
.free-premium-card--premium h3,.free-premium-card--premium .free-premium-list li{color:#fff;}
.free-premium-card--premium .free-premium-card__eyebrow,.free-premium-card--premium h3 span{color:#bcd4f5;}
.free-premium-card--premium .free-premium-card__cta{background:#ff8b1c;color:#fff;border:0;min-height:54px;box-shadow:0 8px 18px #082f6126;}
.free-premium-card--premium .free-premium-card__cta:hover{background:#f57d0b;}
@media(max-width:767px){.free-premium-card--premium .free-premium-card__top{margin-top:24px;}}
/* Class 9 free chapters: reference layout. */
.class9-free-chapters{padding:90px 0 80px;background:linear-gradient(180deg,#fff,#f4f8ff);}
.class9-free-chapters__header{text-align:center;max-width:900px;margin:0 auto 40px;}
.class9-free-chapters__header .section-label,.class9-free-chapters__header .section-title span{color:#fb8c00;}
.class9-free-chapters__header .section-title{color:#05265e;}
.class9-free-chapters__subtitle{margin:14px auto 0;}
.class9-free-chapters__group-title{font-size:36px;font-weight:800;line-height:1.25;text-align:center;margin:36px 0 18px;color:#05265e;}
.class9-free-chapters__grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.class9-free-chapter{position:relative;display:flex;align-items:center;gap:20px;min-width:0;min-height:158px;padding:18px 22px;background:linear-gradient(120deg,#eaf6ff,#f3f8ff);border:1px solid #1677ff;border-radius:16px;text-decoration:none;color:#072766;box-shadow:0 14px 30px #0d47840d;transition:transform .2s,box-shadow .2s;}
.class9-free-chapter:hover{transform:translateY(-3px);box-shadow:0 16px 32px #0d47841a;}
.class9-free-chapter__book{flex:0 0 86px;display:flex;align-items:center;justify-content:center;}
.class9-free-chapter__book img{display:block;width:86px;height:120px;object-fit:contain;filter:drop-shadow(3px 5px 4px #26384933);}
.class9-free-chapter__content{position:relative;flex:1;min-width:0;min-height:96px;border:1px solid #b1d8ff;border-radius:12px;padding:30px 14px 14px;display:flex;align-items:center;justify-content:center;text-align:center;}
.class9-free-chapter__badge{position:absolute;z-index:2;right:-8px;top:-20px;width:64px;height:64px;object-fit:contain;}
.class9-free-chapter__number{position:absolute;top:-21px;left:50%;transform:translateX(-50%);white-space:nowrap;padding:11px 22px;border-radius:30px;background:#247ed6;color:#fff;font-size:14px;font-weight:800;line-height:18px;}
.class9-free-chapter__number--light{background:#a9dcff;color:#06437e;}
.class9-free-chapter__content h4{font-size:18px;font-weight:600;line-height:1.3;margin:0;color:#072766;overflow-wrap:anywhere;}
@media(max-width:1024px){.class9-free-chapters__grid{grid-template-columns:1fr;}.class9-free-chapter__content{min-height:96px;}}
@media(max-width:600px){.class9-free-chapters{padding:48px 0;}.class9-free-chapters__group-title{font-size:26px;}.class9-free-chapter{padding:18px 12px;gap:12px;}.class9-free-chapter__book{flex-basis:64px;}.class9-free-chapter__book img{width:64px;height:100px;}.class9-free-chapter__content{padding:30px 8px 12px;}.class9-free-chapter__content h4{font-size:15px;}.class9-free-chapter__badge{width:42px;height:42px;right:-5px;top:-22px;}.class9-free-chapter__number{padding:8px 10px;font-size:11px;top:-18px;left:40%;}}