@font-face{font-family:ClassroomBangla;src:local('Noto Sans Bengali'),local('Nirmala UI');font-display:swap}
:root{--ink:#152d35;--muted:#6b7f84;--teal:#087f74;--border:#dfe8e6;--bg:#f5f8f7;--red:#b63c4a}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:ClassroomBangla,'Segoe UI',sans-serif;font-size:15px;line-height:1.7}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,.button{display:inline-flex;justify-content:center;align-items:center;gap:16px;border:0;border-radius:9px;background:var(--teal);color:white;padding:11px 20px;font-weight:600;cursor:pointer;text-align:center}button:hover,.button:hover{filter:brightness(.94)}button:disabled{opacity:.6;cursor:wait}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #f1b453;outline-offset:3px}header{min-height:92px;background:white;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:35px;padding:16px max(24px,calc((100vw - 1240px)/2));}.brand{display:flex;align-items:center;gap:11px;font-size:23px;font-weight:750;letter-spacing:-.5px;line-height:1.2}.brand small{font-size:9px;letter-spacing:2px;display:block;margin-top:7px}.brand-icon{background:var(--teal);color:white;width:44px;height:44px;border-radius:13px;display:grid;place-items:center;font-size:19px}.account{margin-left:auto;display:flex;align-items:center;gap:10px;font-size:13px}.avatar{width:35px;height:35px;display:grid;place-items:center;border-radius:50%;background:#e9f0dc;color:#446443}nav{display:flex;gap:26px;font-size:14px}nav a{color:var(--muted);white-space:nowrap}nav a.active{color:var(--teal);font-weight:700}main{max-width:1240px;margin:0 auto;padding:34px 24px 65px}h1,h2,h3,p{margin-top:0}h2{font-size:25px;line-height:1.4;margin-bottom:16px}h3{font-size:19px;line-height:1.6}p{margin-bottom:18px}.hero{overflow:hidden;position:relative;display:grid;grid-template-columns:1.15fr 1fr;align-items:center;background:#123c39;border-radius:22px;color:white;padding:48px 52px;min-height:376px}.hero h1{font-size:43px;line-height:1.45;font-weight:700;margin:14px 0 18px;letter-spacing:-1px}.hero h1 em{font-style:normal;color:#cae59e}.hero p{color:#d1ded9}.eyebrow{font-size:11px;letter-spacing:1.5px;font-weight:700}.hero .eyebrow{color:#b7d6c7}.teal{color:var(--teal)}.light{background:#e0f0c7;color:#214239;min-width:166px}.hero-art{height:270px;position:relative;display:grid;place-items:center}.orbit{position:absolute;border:1px solid #53756a;border-radius:50%;width:330px;height:330px;opacity:.55}.orbit:before{content:'';position:absolute;inset:28px;border:1px dashed #53756a;border-radius:50%}.art-card{position:relative;width:320px;border-radius:16px;transform:rotate(-5deg);background:#23564c;border:1px solid #6c8f71;box-shadow:15px 18px 0 #092f2c;padding:26px}.live-dot{color:#d1e6b4;font-size:10px;letter-spacing:2px}.chalk{font-family:Georgia,serif;font-size:28px;font-style:italic;margin:22px 0 9px;color:#ecedd6}.art-line{height:2px;background:#b8d790;width:180px}.art-card p{font-size:12px;margin:15px 0}.mini-avatars{font-size:23px;color:#d4ddad}.mini-avatars small{font-size:11px;color:#d5e1d8}.floating{position:absolute;bottom:-5px;right:-5px;border-radius:10px;background:#eef4da;color:#244b41;padding:12px 18px;font-size:13px;box-shadow:0 10px 25px #001b252b}.feature-strip{display:grid;grid-template-columns:repeat(4,1fr);padding:25px 8px;border-bottom:1px solid var(--border);margin-bottom:36px;gap:20px;color:#506463;font-size:14px}.feature-strip span{display:flex;align-items:center;justify-content:center;gap:12px}.feature-strip b{color:var(--teal);font-size:23px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:21px}.section-head h2,.section-head h1{margin-bottom:6px}.muted{color:var(--muted)}.small{font-size:13px}.search{display:flex;gap:10px;max-width:600px;margin-bottom:20px}.search input{margin:0}.tabs{display:flex;gap:9px;margin:20px 0 28px;flex-wrap:wrap}.tabs a{padding:8px 19px;border:1px solid var(--border);border-radius:8px;background:white;color:var(--muted);font-size:13px}.tabs a.selected{background:var(--teal);border-color:var(--teal);color:white}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.course{border:1px solid var(--border);border-radius:14px;overflow:hidden;background:white;transition:transform .2s,box-shadow .2s}.course:hover{transform:translateY(-3px);box-shadow:0 10px 30px #183e3510}.cover{height:190px;display:block;position:relative;overflow:hidden;background:#dce9de;padding:19px}.cover:after{content:'';position:absolute;width:160px;height:160px;border:1px solid #ffffff80;border-radius:50%;right:-22px;top:12px;box-shadow:0 0 0 27px #ffffff25,0 0 0 54px #ffffff15}.tone-1{background:#e7e2f2;color:#605284}.tone-2{background:#f3e7ce;color:#9e7242}.tone-3{background:#dceaf2;color:#3d708c}.badge{display:inline-block;font-size:11px;background:#fffdf0;color:#425854;padding:4px 10px;border-radius:5px;position:relative;z-index:1}.badge.red{background:#d74750;color:white}.cover-symbol{position:absolute;right:50px;top:40px;font:italic 82px Georgia,serif;opacity:.55}.subject{position:absolute;bottom:22px;left:20px;font-size:19px;font-weight:700;max-width:72%;line-height:1.4}.play{position:absolute;bottom:18px;right:20px;width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:#ffffffb0;z-index:1}.course-body{padding:22px}.course-body h3{margin:8px 0 12px}.teacher-name{font-size:13px;color:#657572;margin-bottom:9px}.course-bottom{border-top:1px solid var(--border);padding-top:17px;display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--teal);margin-top:20px}.course-bottom a{font-size:12px}.empty{text-align:center;padding:55px 20px;border:1px dashed #c9d8d1;border-radius:14px;background:white}.empty>span{font-size:40px;color:var(--teal)}.empty p{color:var(--muted)}.pagination{display:flex;justify-content:center;gap:20px;padding:30px}.notice{padding:13px 18px;background:#e4f2e9;color:#285f43;border:1px solid #c9e1ce;border-radius:8px;margin-bottom:22px}.back{display:inline-block;color:var(--muted);margin-bottom:22px}.page-title{font-size:32px;line-height:1.5;margin:8px 0 16px}.panel{background:white;border:1px solid var(--border);border-radius:14px;padding:27px;margin-bottom:24px;overflow-wrap:anywhere}.panel h2{font-size:22px}.class-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:27px}.player-panel{background:#102c30;border-radius:14px;overflow:hidden;margin-bottom:22px}video{display:block;width:100%;max-height:510px;background:#07191b}.playlist{padding:12px;display:flex;gap:10px;flex-wrap:wrap}.video-choice{font-size:12px;padding:7px 11px;background:#31534f;max-width:100%;overflow-wrap:anywhere}.video-choice.selected{background:#cde5ac;color:#17372d}.video-placeholder,.locked{text-align:center;padding:65px 35px;color:#d7e6df}.video-placeholder>span,.locked>span{font-size:50px;color:#cfe4a9}.video-placeholder p{font-size:14px;color:#aabfb5}.locked{border-radius:14px;background:#153c37;margin-bottom:24px}.locked strong{font-size:32px;color:#dcebb9}.live-banner{border:1px solid #c7ddcf;background:#e9f3ec;display:flex;align-items:center;justify-content:space-between;padding:20px;border-radius:12px;margin-bottom:24px;gap:12px}.live-banner p{margin:4px 0 0;font-size:12px}.pulse{color:#d64848}.enrollment>p{line-height:2.2;color:var(--muted)}.full{width:100%}.preserve{white-space:pre-wrap;overflow-wrap:anywhere}.inline{display:flex;gap:12px;align-items:end;flex-wrap:wrap}.inline form{margin:0}.inline label{margin-bottom:0;flex:1;min-width:120px}.secondary{background:#edf4f1;color:var(--teal);border:1px solid #d3e3dc}.danger{color:#ae3644}.danger:not(.secondary):not(.text-button){background:#ae3644;color:white}.danger-zone{border-color:#e7cbce}.danger-zone p{color:var(--muted)}.error{color:#b6404a}label{display:block;font-size:13px;font-weight:600;margin-bottom:19px}input,select,textarea{display:block;width:100%;border:1px solid #cfddd7;border-radius:8px;background:#fbfcfb;color:var(--ink);padding:11px 12px;margin-top:7px;min-width:0}textarea{resize:vertical;line-height:1.8}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.form-grid.three{grid-template-columns:repeat(3,1fr)}.file-link{padding:15px 0;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:14px;overflow-wrap:anywhere}.file-link small,td small{display:block;color:var(--muted);font-size:11px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin:28px 0}.stats>div{padding:23px;background:white;border:1px solid var(--border);border-radius:12px}.stats span{color:var(--muted);font-size:13px}.stats strong{display:block;font-size:32px;color:var(--teal)}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;text-align:left;font-size:14px}th,td{padding:15px 12px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-size:12px;font-weight:500;background:#f7faf8}.pill{display:inline-block;font-size:11px;padding:3px 9px;background:#edf3ee;color:#4e7462;border-radius:5px;white-space:nowrap}.small-button{font-size:12px;padding:6px 10px}.message-form{padding-bottom:22px;border-bottom:1px solid var(--border)}.message{border-bottom:1px solid var(--border);padding:20px 0}.message.answer{padding-left:18px;border-left:3px solid #95c7a9;margin-top:10px}.message p{margin:10px 0}.message-head{display:flex;align-items:center;gap:12px}.message small{font-size:11px}summary{cursor:pointer;color:var(--teal);font-size:13px;margin-top:10px}.text-button{padding:3px 0;background:none;font-size:11px}.upload-status{font-size:12px;color:var(--teal)}footer{display:flex;justify-content:space-between;gap:20px;max-width:1192px;margin:auto;border-top:1px solid var(--border);padding:26px 0;color:var(--muted);font-size:12px}footer b{color:var(--teal)}
@media(min-width:1500px){main{padding-top:45px}.hero{min-height:410px}.hero h1{font-size:46px}}
@media(max-width:1050px){header{gap:20px;flex-wrap:wrap}nav{order:3;width:100%;justify-content:center;gap:25px}.hero{padding:35px;grid-template-columns:1.2fr 1fr}.hero h1{font-size:34px}.art-card{width:255px;padding:20px}.chalk{font-size:23px}.orbit{width:270px;height:270px}.floating{font-size:11px;right:-15px}.cards{gap:15px}.course-body{padding:18px}.class-layout{grid-template-columns:minmax(0,1fr) 285px}footer{margin:0 24px}}
@media(max-width:760px){header{padding:16px 20px}.account>span:last-child{max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}nav{justify-content:flex-start;overflow:auto;gap:22px;font-size:12px}.brand{font-size:20px}main{padding:22px 18px 40px}.hero{padding:30px;grid-template-columns:1fr}.hero h1{font-size:34px}.hero-art{height:245px;margin:28px 0 10px}.floating{right:10px;bottom:0}.feature-strip{grid-template-columns:1fr 1fr;gap:12px;padding:22px 0;font-size:12px}.feature-strip span{justify-content:flex-start}.cards{grid-template-columns:1fr 1fr}.course-bottom{align-items:flex-start;flex-direction:column;gap:8px}.section-head{align-items:flex-start;flex-wrap:wrap}.section-head h2{font-size:23px}.page-title{font-size:26px}.class-layout{grid-template-columns:1fr}.class-layout aside{display:flex;flex-direction:column}.stats{grid-template-columns:1fr 1fr;gap:12px}.panel{padding:20px}.form-grid,.form-grid.three{grid-template-columns:1fr;gap:0}.live-banner{flex-wrap:wrap}.live-banner .button{width:100%}.tabs{gap:6px}.tabs a{padding:7px 12px}.inline>button{margin-top:8px}.hero h1 em{display:block}footer{flex-direction:column;gap:8px}}
@media(max-width:450px){.cards{grid-template-columns:1fr}.course-bottom{flex-direction:row;align-items:center}.hero{padding:25px}.hero h1{font-size:30px}.hero-art{height:235px}.search button{white-space:nowrap;padding:10px 15px}.cover{height:195px}.feature-strip{font-size:11px}.feature-strip b{font-size:19px}.account .button{padding:8px 12px;font-size:12px}}

/* Enrollment and teacher workspace */
.hero-guide{padding:28px;margin-left:32px;border:1px solid #719989;border-radius:16px;background:#ffffff0a;color:#e0efdc}.hero-guide h2{font-size:23px}.hero-guide a{color:#d3edaa}.steps{padding-left:24px;line-height:2.1}.steps li{padding:5px 0}.card-actions{display:grid;gap:12px;margin-top:18px;text-align:center;font-size:13px}.empty-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.contact-actions{display:grid;gap:10px;margin:18px 0}.contact-actions a{overflow-wrap:anywhere;font-size:13px}.contact-box{border-top:1px solid var(--border);margin-top:22px;padding-top:22px}.contact-box h3{margin-bottom:8px}.narrow{max-width:820px;margin-left:auto;margin-right:auto}.payment-instructions,.teacher-reply{border-left:4px solid var(--teal);background:#edf5ef;padding:20px;margin:20px 0}.payment-instructions p,.teacher-reply p{margin-bottom:0}.setup-help,.lesson-editor{padding:18px;border:1px solid var(--border);border-radius:10px;margin-top:20px}.lesson-editor form{margin-top:16px}.youtube-frame{position:relative;aspect-ratio:16/9;background:#102c30;border-radius:10px;overflow:hidden}.youtube-frame iframe{display:block;width:100%;height:100%;border:0;min-height:200px}.light-playlist{padding:16px 0}.light-playlist button{font-size:13px;padding:8px 12px}.light-playlist button.selected{background:#153c37}.share-status{margin:12px 0 0;overflow-wrap:anywhere}pre{white-space:pre-wrap;overflow-wrap:anywhere}.panel>form{scroll-margin-top:20px}
@media(max-width:760px){.hero-guide{margin:24px 0 0;padding:20px}.hero .inline{align-items:stretch}.hero .inline a{width:100%}.youtube-frame{aspect-ratio:auto}.youtube-frame iframe{aspect-ratio:16/9;height:auto;min-height:200px}}