:root{--ink:#202235;--muted:#6c7080;--primary:#176c8e;--primary-dark:#10536e;--accent:#cc4b68;--yellow:#f7c948;--aqua:#3ebbb2;--purple:#8d55d7;--paper:#f7f8fb;--white:#fff;--line:#dfe3ea;--shadow:0 10px 30px rgba(23,48,68,.09)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Hind Siliguri",system-ui,sans-serif;font-size:16px;line-height:1.5}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.container{width:min(1180px,calc(100% - 32px));margin:auto}.site-header{background:#fff;box-shadow:0 2px 12px rgba(24,40,58,.06);position:sticky;top:0;z-index:30}.header-topline{height:54px;display:flex;align-items:center;justify-content:space-between}.brand{font-size:1.45rem;font-weight:700;color:var(--primary)}.header-actions{display:flex;align-items:center;gap:22px}.header-actions a{display:flex;align-items:center;gap:7px;position:relative;font-weight:600}.user-circle{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#f0e8ff;color:var(--purple)}.cart-link b{position Magnify:absolute;top:-10px;left:12px;background:var(--accent);color:#fff;border-radius:99px;min-width:20px;height:20px;text-align:center;font-size:.75rem}.search-line{padding:8px 0 18px}.search{width:min(760px,100%);height:50px;margin:auto;border:1px solid #c9d3db;border-radius:7px;display:grid;grid-template-columns:48px 1fr 205px;overflow:hidden;background:#fff}.search>span{display:grid;place-items:center;font-size:1.6rem;color:#3f4952}.search input{border:0;outline:0;padding:0 10px;min-width:0}.search button{border:0;background:var(--primary);color:#fff;font-weight:600;cursor:pointer}.search button:hover{background:var(--primary-dark)}.main-nav{border-top:1px solid var(--line)}.nav-inner{min-height:88px;display:flex;align-content:center;justify-content:center;gap:0;flex-wrap:wrap}.nav-inner>a{padding:8px 17px;font-weight:600;white-space:nowrap;border-radius:7px}.nav-inner>a:hover{background:#eaf5f8;color:var(--primary)}.mobile-menu{display:none;border:0;background:none;font-weight:700;color:var(--primary)}
.sketch-layout{display:grid;grid-template-columns:235px minmax(0,1fr);align-items:stretch;margin-top:20px;border:1px solid #bfcbd3;background:#fff}.home-directory{border-right:1px solid #bfcbd3;padding:22px 19px;background:#fbfcfe}.directory-main{margin:0 0 20px;padding-left:25px}.directory-main li{margin:8px 0}.directory-main a{text-decoration:underline;text-underline-offset:3px}.home-directory h2{font-size:1rem;margin:18px 0 9px}.age-links{display:grid;gap:8px}.age-links a{display:grid;grid-template-columns:5px 1fr auto;gap:8px;align-items:center;padding:7px 8px;background:#fff;border:1px solid var(--line);border-radius:7px}.age-links i{height:100%;min-height:34px;border-radius:4px}.age-links span{font-weight:600;font-size:.92rem}.english-link{display:block;margin-top:20px;font-weight:600}.home-main{min-width:0;padding:0 10px 30px}.hero-slider{height:220px;position:relative;overflow:hidden}.hero-slide{display:none;position:absolute;inset:0;padding:30px 42px;align-items:center;justify-content:space-between;background:var(--banner-bg,#eef6f9);color:var(--banner-ink,var(--ink))}.hero-slide.active{display:flex}.hero-slide h1{font-size:2.15rem;line-height:1.15;margin:0 0 8px}.hero-slide p{margin:0 0 18px;max-width:540px}.hero-slide>img{width:42%;height:180px;object-fit:contain}.banner-books{display:flex;gap:9px;align-items:flex-end}.banner-books span{width:68px;height:130px;display:grid;place-items:center;color:#fff;font-size:2rem;font-weight:700;border:6px solid rgba(255,255,255,.8);background:var(--primary);box-shadow:5px 6px 10px rgba(0,0,0,.14)}.banner-books span:nth-child(2){height:155px;background:var(--accent)}.banner-books span:nth-child(3){height:115px;background:var(--aqua)}.slider-dots{position:absolute;left:50%;bottom:12px;display:flex;gap:7px}.slider-dots button{border:0;width:8px;height:8px;border-radius:99px;background:#fff;opacity:.7}.slider-dots button.active{width:25px;background:var(--primary);opacity:1}.primary-btn,.outline-btn,.outline-dark-btn{display:inline-flex;align-items:center;justify-content:center;border-radius:7px;padding:11px 19px;font-weight:700;cursor:pointer}.primary-btn{border:0;background:var(--primary);color:#fff}.primary-btn:hover{background:var(--primary-dark)}.outline-dark-btn{border:1px solid var(--primary);background:#fff;color:var(--primary)}
.book-section{margin-top:18px}.exact-shelf{border:1px solid #bfcbd3;padding:15px;background:#fff}.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:13px}.section-head h1,.section-head h2{margin:0}.section-head h2{font-size:1.25rem}.section-head>a{color:var(--primary);font-weight:600}.book-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.book-card{min-width:0;background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;transition:.2s}.book-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.cover-wrap{height:220px;display:block;position:relative;padding:16px;background:#f0f3f6}.book-cover{width:100%;height:100%;object-fit:contain}.cover-fallback{display:flex;flex-direction:column;justify-content:center;text-align:center;padding:16px;color:#fff;background:linear-gradient(150deg,hsl(var(--cover-hue) 48% 47%),hsl(var(--cover-hue) 48% 25%));border:6px solid rgba(255,255,255,.83);box-shadow:4px 6px 8px rgba(0,0,0,.16);font-weight:700}.cover-fallback small{margin-top:14px;font-weight:400}.discount{position:absolute;top:9px;right:9px;background:var(--accent);color:#fff;padding:3px 7px;border-radius:5px;font-size:.78rem;font-weight:700}.card-body{padding:12px}.book-title{font-weight:700;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.author{display:block;color:var(--muted);font-size:.86rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.price{display:flex;align-items:center;gap:7px;margin-top:6px}.price strong{color:var(--primary)}.price del{color:#9096a0;font-size:.82rem}.add-cart{width:100%;border:1px solid var(--primary);color:var(--primary);background:#fff;border-radius:6px;padding:8px;margin-top:8px;font-weight:700;cursor:pointer}.add-cart:hover{background:var(--primary);color:#fff}.add-cart:disabled{opacity:.5}.empty-inline{color:var(--muted);text-align:center;padding:25px}
.shop-page{display:grid;grid-template-columns:220px 1fr;gap:24px;padding-top:30px}.filters,.panel{background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px;box-shadow:var(--shadow)}.filters{height:max-content}.filters h2{margin-top:0}.filters h3{font-size:.95rem;border-top:1px solid var(--line);padding-top:14px}.filters a{display:block;padding:6px;color:#545968}.filters a.active,.filters a:hover{color:var(--primary);font-weight:600}.catalog-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:16px}.catalog-head h1{margin:0}.product-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}select,input,textarea{border:1px solid #cbd3dc;border-radius:7px;padding:10px;background:#fff}.empty-state{text-align:center;padding:55px}
.breadcrumb{display:flex;gap:8px;color:var(--muted);padding-top:22px;font-size:.9rem}.product-detail{display:grid;grid-template-columns:300px minmax(0,1fr) 245px;gap:34px;background:#fff;border:1px solid var(--line);border-radius:12px;margin-top:14px;padding:30px}.main-cover{height:400px}.detail-cover{max-width:275px;margin:auto}.video-link{display:block;text-align:center;border:1px solid var(--line);padding:10px;border-radius:6px;margin-top:10px;color:var(--primary)}.product-copy h1{font-size:1.9rem;line-height:1.25;margin:10px 0}.byline,.delivery-note{color:var(--muted)}.rating{color:#e8a018}.rating span{color:var(--muted)}.stock{border-radius:20px;padding:4px 10px;font-size:.82rem;font-weight:700}.stock.in{background:#e3f5ea;color:#197148}.stock.out{background:#fee9e9;color:#aa3333}.detail-price{display:flex;align-items:center;gap:12px;margin:18px 0}.detail-price strong{font-size:1.7rem;color:var(--primary)}.detail-price del{color:var(--muted)}.detail-price span{font-size:.8rem;background:#ffefea;color:#b8442e;padding:4px 7px;border-radius:4px}.quick-meta{list-style:none;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line)}.quick-meta li{background:#fff;padding:9px;display:flex;flex-direction:column}.quick-meta span{font-size:.78rem;color:var(--muted)}.buy-row{display:flex;gap:9px}.qty{display:flex;border:1px solid var(--line);border-radius:7px}.qty button{border:0;width:34px}.qty input{width:38px;border:0;text-align:center}.detail-add{flex:1}.similar-mini{border-left:1px solid var(--line);padding-left:18px}.similar-mini h2{font-size:1rem}.similar-mini>a{display:grid;grid-template-columns:50px 1fr;gap:8px;margin:11px 0}.similar-mini .book-cover{height:67px}.similar-mini span{display:flex;flex-direction:column;min-width:0}.similar-mini b,.similar-mini small{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.similar-mini small{color:var(--muted)}.similar-mini strong{color:var(--primary)}.product-tabs{background:#fff;margin-top:22px;border:1px solid var(--line);border-radius:10px;padding:0 26px 26px}.tabs{display:flex;gap:18px;border-bottom:1px solid var(--line)}.tabs button{border:0;background:none;padding:15px 4px;border-bottom:3px solid transparent}.tabs button.active{color:var(--primary);border-color:var(--primary)}.tab-panel{display:none;padding-top:18px}.tab-panel.active{display:block}.spec-grid{display:grid;grid-template-columns:160px 1fr;gap:1px;background:var(--line)}.spec-grid>*{background:#fff;padding:11px}.spec-grid span{color:var(--muted)}
.auth-page{min-height:60vh;display:grid;place-items:center;padding:40px 16px}.auth-card{background:#fff;width:min(460px,100%);padding:30px;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}.auth-card h1{margin:0}.auth-card label{display:block;font-weight:600;margin:13px 0 5px}.auth-card input{width:100%}.auth-card .primary-btn{width:100%;margin-top:18px}.hint{color:var(--muted);font-size:.9rem}.otp-code{letter-spacing:.45em;text-align:center;font-size:1.35rem}.honeypot{position:absolute!important;left:-9999px!important}.link-btn{border:0;background:none;color:var(--primary);padding:11px 0}.toast{position:fixed;top:20px;right:20px;z-index:99;color:#fff;padding:12px 18px;border-radius:8px;box-shadow:var(--shadow)}.toast.error{background:#a83342}.toast.success{background:#207450}
.cart-layout,.checkout-layout{display:grid;grid-template-columns:1fr 335px;gap:24px;padding-top:32px}.cart-item{display:grid;grid-template-columns:72px 1fr auto;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}.cart-item .book-cover{height:92px}.summary-row{display:flex;justify-content:space-between;padding:8px 0}.summary-row.total{font-size:1.2rem;border-top:1px solid var(--line);margin-top:7px;padding-top:13px}.wide{width:100%}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}.form-grid label{display:flex;flex-direction:column;gap:4px}.form-grid .full{grid-column:1/-1}.payment-box{background:#edf7fa;padding:14px;border-radius:8px}.account-page{padding-top:32px}.orders{width:100%;border-collapse:collapse}.orders th,.orders td{text-align:left;padding:11px;border-bottom:1px solid var(--line)}.status{background:#eaf5f8;color:var(--primary);border-radius:20px;padding:4px 9px}.center{text-align:center}.success-icon{width:64px;height:64px;border-radius:50%;display:grid;place-items:center;margin:auto;background:#e3f5ea;color:#197148;font-size:2rem}
footer{margin-top:50px;background:#172d38;color:#d8e3e8;padding-top:40px}.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:30px}.footer-grid h3{color:#fff}.footer-grid a{display:block;margin:6px 0}.footer-brand{color:#fff}.footer-bottom{text-align:center;border-top:1px solid #35505d;margin-top:30px;padding:17px}
@media(max-width:1000px){.sketch-layout{grid-template-columns:210px minmax(0,1fr)}.book-row,.product-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.book-card:nth-child(4){display:none}.product-detail{grid-template-columns:260px 1fr}.similar-mini{grid-column:1/-1;border-left:0;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(2,1fr)}.similar-mini h2{grid-column:1/-1}}
@media(max-width:740px){.container{width:min(100% - 22px,1180px)}.site-header{position:static}.header-topline{height:60px}.search{grid-template-columns:42px 1fr 90px}.main-nav .nav-inner{display:block;min-height:44px}.mobile-menu{display:block;padding:11px}.nav-inner>a{display:none}.nav-inner.open>a{display:block}.sketch-layout{grid-template-columns:1fr;border:0;background:transparent}.home-directory{border:1px solid var(--line);border-radius:9px;margin-bottom:12px}.directory-main{display:flex;gap:25px;flex-wrap:wrap;padding-left:18px}.age-links{grid-template-columns:1fr 1fr}.home-main{padding:0}.hero-slider{height:270px;border:1px solid var(--line)}.hero-slide{padding:28px 24px}.hero-slide h1{font-size:1.75rem}.banner-books,.hero-slide>img{display:none}.book-row,.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.book-card:nth-child(3),.book-card:nth-child(4){display:none}.cover-wrap{height:205px}.shop-page{grid-template-columns:1fr}.filters{display:none}.product-detail{grid-template-columns:1fr;padding:19px}.main-cover{height:340px}.similar-mini{grid-template-columns:1fr}.product-tabs{padding:0 17px 20px}.tabs{overflow-x:auto}.tabs button{white-space:nowrap}.cart-layout,.checkout-layout{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.form-grid .full{grid-column:auto}.footer-grid{grid-template-columns:1fr 1fr}.orders{display:block;overflow-x:auto}}
@media(max-width:430px){.header-actions a span:not(.user-circle){display:none}.age-links{grid-template-columns:1fr}.exact-shelf{padding:10px}.cover-wrap{height:185px;padding:10px}.card-body{padding:9px}.footer-grid{grid-template-columns:1fr}}
.cart-link b{position:absolute}
.review-list{display:grid;gap:12px;margin:16px 0 24px}.review{border:1px solid var(--line);border-radius:8px;padding:14px}.review>div{display:flex;justify-content:space-between;gap:15px}.review span{color:#e8a018}.review p{margin:8px 0}.review small,.review-form small{color:var(--muted)}.review-form{display:grid;grid-template-columns:180px 1fr;gap:12px;border-top:1px solid var(--line);padding-top:20px}.review-form label{display:flex;flex-direction:column;gap:5px}.review-form label:nth-of-type(2){grid-row:span 2}.review-form .primary-btn{align-self:end}.link-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.link-grid a{background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px;font-weight:600}.link-grid a:hover{border-color:var(--primary);color:var(--primary)}
@media(max-width:740px){.review-form{grid-template-columns:1fr}.review-form label:nth-of-type(2){grid-row:auto}.link-grid{grid-template-columns:1fr 1fr}}
.header-topline{height:78px}.brand-logo{display:flex;align-items:center}.brand-logo img{display:block;width:190px;height:68px;object-fit:contain;object-position:left center}.gallery-thumbs{display:flex;gap:8px;overflow-x:auto;margin-top:12px;padding-bottom:4px}.gallery-thumbs button{flex:0 0 62px;height:74px;border:2px solid transparent;border-radius:7px;background:#fff;padding:4px;cursor:pointer}.gallery-thumbs button.active{border-color:var(--primary)}.gallery-thumbs img{width:100%;height:100%;object-fit:contain}.book-video{display:block;width:100%;max-height:260px;margin-top:14px;border-radius:8px;background:#111}.save-book-form{margin-top:10px}.save-book-btn{display:inline-flex;width:100%;align-items:center;justify-content:center;border:1px solid var(--purple);border-radius:7px;background:#fff;color:var(--purple);padding:10px 16px;font-weight:700;cursor:pointer;margin-top:10px}.save-book-btn.saved{background:#f3eaff}.account-section{margin-top:20px}.saved-books-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.saved-book{display:grid;grid-template-columns:78px 1fr;gap:12px;border:1px solid var(--line);border-radius:8px;padding:10px}.saved-book .book-cover{height:105px}.saved-book>div{display:flex;flex-direction:column;min-width:0}.saved-book strong{color:var(--primary)}.saved-book form{margin-top:auto}.saved-book button{border:0;background:none;color:var(--accent);padding:4px 0;cursor:pointer}
@media(max-width:740px){.header-topline{height:68px}.brand-logo img{width:145px;height:56px}.saved-books-grid{grid-template-columns:1fr}.product-gallery{min-width:0}}