:root{--blue:#086bff;--dark:#102456;--violet:#864cff;--ink:#142554;--soft:#eff5ff}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#ffffff;color:var(--ink);font:15px/1.5 "Trebuchet MS",Arial,sans-serif;overflow-x:hidden}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
.scene{min-height:100vh;position:relative;isolation:isolate;overflow:visible;background:#fff}
.scene-left,.scene-right{position:fixed;top:0;bottom:0;height:100vh;width:clamp(210px,19vw,310px);background-repeat:no-repeat;background-size:cover;pointer-events:none;z-index:0;filter:drop-shadow(0 8px 28px rgba(42,87,147,.08))}
.scene-left{left:0;background-image:url("left-art.webp");background-position:center top}
.scene-right{right:0;background-image:url("right-art.webp");background-position:center top}
.shell{position:relative;z-index:1;width:min(1170px,calc(100% - 40px));margin:16px auto 30px;background:rgba(255,255,255,.98);border-radius:25px;box-shadow:0 14px 55px #2a579333;overflow:hidden;min-height:85vh}
.top{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px 28px 13px;background:#ffffffeb}
.brand{display:flex;align-items:center;min-width:250px;gap:10px}
.logo{font-size:43px;filter:drop-shadow(1px 3px 0 #8dd6ff)}
.brand strong{display:block;font-size:26px;letter-spacing:-1px;line-height:1.1;color:#14235a}
.brand strong span{color:#006aff}
.brand small{display:block;color:#8795b8;font-size:11px;margin-top:4px}
.search{display:flex;max-width:480px;flex:1;border:1px solid #e2e8f9;border-radius:14px;overflow:hidden;background:#f5f8ff;height:48px}
.search input{flex:1;min-width:0;background:transparent;border:0;padding:0 16px;outline:0;color:#253766}
.search button{background:linear-gradient(120deg,#16b8fa,#0864f5);border:0;color:white;font-size:27px;width:56px}
.account{display:flex;align-items:center;gap:8px;white-space:nowrap}
.hello{font-size:12px;max-width:110px;overflow:hidden;text-overflow:ellipsis}
.btn{border:0;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;padding:11px 17px;transition:transform .18s,box-shadow .18s}
.btn:hover{transform:translateY(-2px)}
.btn.primary{background:linear-gradient(120deg,#12b6ef,#005cf7);color:#fff;box-shadow:0 5px 14px #0f79ef25}
.btn.white{background:#fff;color:#0865e8;border:1px solid #c7d9ff}
.btn.wide{width:100%}
.nav{display:flex;gap:20px;justify-content:center;align-items:center;padding:12px;background:#fff;border-block:1px solid #edf1fa;flex-wrap:wrap}
.nav a{font-size:12px;font-weight:800;color:#153161}
.nav a:hover{color:var(--blue)}
.pagewrap{padding:16px 18px 30px}
.hero{position:relative;display:flex;overflow:hidden;isolation:isolate;min-height:203px;background:linear-gradient(105deg,#087fe9,#437af6 48%,#975bf3 77%,#d65de7);border-radius:23px;color:#fff}
.hero:after{content:"";position:absolute;inset:-70% 5% auto auto;width:430px;height:440px;border:70px solid #ffffff12;border-radius:50%;z-index:-1}
.hero-copy{position:relative;padding:28px 30px;z-index:2;max-width:68%}
.hero h1{font-size:31px;line-height:1.16;letter-spacing:-.9px;margin:0 0 9px;font-weight:900}
.hero p{margin:0 0 17px;font-size:14px}
.hero-pills{display:flex;gap:8px;flex-wrap:wrap}
.hero-pills a{color:#204194;font-size:12px;font-weight:800;background:#fff;border-radius:99px;padding:10px 13px;box-shadow:0 8px 18px #00185b14}
.hero-art{position:absolute;right:0;top:0;bottom:0;width:41%;background-image:linear-gradient(90deg,#805ef500,#805ef500 68%,#bd64d813),url("hero-boy.webp");background-size:cover;background-position:center;mask-image:linear-gradient(90deg,transparent,black 27%);-webkit-mask-image:linear-gradient(90deg,transparent,black 27%)}
.hero-spark{position:absolute;right:35%;top:19%;font-size:24px;color:#ffe55a}
.browse{display:grid;grid-template-columns:220px minmax(0,1fr);gap:18px;margin-top:19px}
.filters{border:1px solid #e4edfd;border-radius:20px;padding:18px 17px;background:#fff;align-self:start}
.filters h3{font-size:13px;margin:0 0 11px;font-weight:900}
.filters label{display:flex;gap:7px;align-items:center;color:#44587c;font-size:13px;margin:9px 0}
.filters input{accent-color:#1375ff}
.filters hr{border:0;border-top:1px solid #ebeff7;margin:16px 0}
.clear{color:#166bff;font-weight:800;font-size:12px}
.heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:3px 0 17px}
.heading h2{font-size:24px;letter-spacing:-.6px;line-height:1.2;margin:0}
.heading p{color:#7b8baa;font-size:13px;margin:4px 0 0}
.counter{border-radius:12px;padding:9px 12px;background:#f0eaff;color:#7a3dec;font-weight:800;font-size:12px}
.tags{display:flex;gap:5px;flex-wrap:wrap}
.tags span,.tag{background:#eaf1ff;color:#2570e8;font-size:10px;font-weight:800;padding:5px 9px;border-radius:99px}
.tags span:nth-child(even){background:#ffe9f4;color:#f14498}
.empty{padding:55px 12px;text-align:center;color:#657494}
.empty span{font-size:55px}
.empty h3{color:#213869}
.notice{border-radius:12px;padding:14px 16px;margin:16px 0}
.notice.good{background:#ecfff4;color:#116d49}
.notice.bad{background:#ffebee;color:#ab2347}
.notice.warn{background:#f2f7ff;color:#31528a}
.auth-card{max-width:440px;margin:36px auto 70px;background:#fff;border:1px solid #e8effa;box-shadow:0 18px 40px #0951a31a;border-radius:25px;padding:32px}
.auth-icon{font-size:40px;text-align:center}
.auth-card h2,.auth-card p{text-align:center}
.auth-card h2{margin:8px 0}
.auth-card p{color:#7384a3;font-size:13px}
.auth-card form,.adminbox form:not(.review){display:grid;gap:14px}
.auth-card label,.adminbox label{font-weight:800;font-size:12px;color:#425679;display:grid;gap:7px}
.auth-card input,.adminbox input,.adminbox select,.adminbox textarea{min-width:0;width:100%;padding:12px;border-radius:10px;border:1px solid #dce6fa;background:#fcfdff;outline-color:#2384ff;color:#284069}
.swap{text-align:center;margin-top:18px;color:#176bee;font-weight:800}
.detail{display:grid;grid-template-columns:1.12fr 1fr;gap:26px;margin-top:20px}
.detail-media,.detail-info{border-radius:20px;background:#fff;border:1px solid #e8eafa;padding:20px}
.detail-media{display:flex;flex-direction:column;align-items:center;gap:20px}
.detail-media img{width:100%;min-height:300px;max-height:390px;object-fit:contain;background:linear-gradient(135deg,#e5f5ff,#f8eaff);border-radius:14px}
.detail-info h2{font-size:25px}
.detail-info p{line-height:1.8}
.detail-info form{margin-top:12px}
.muted{color:#8290a9;font-size:13px}
.inline-buttons{display:flex;gap:10px}
.panel{margin-top:20px}
.panel-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.adminbox{background:#fff;border:1px solid #e2ebfc;border-radius:18px;padding:22px;margin-bottom:18px;box-shadow:0 8px 22px #123c7a0d}
.adminbox h3{margin:0 0 16px;font-size:18px}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.adminbox .check{display:flex;align-items:center;gap:11px;font-size:14px}
.adminbox .check input{width:18px;height:18px}
.tablewrap{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:13px}
td,th{border-bottom:1px solid #e8edf7;text-align:left;padding:10px;white-space:nowrap}
th{color:#65789c}
.review{display:flex;align-items:center;gap:5px}
.review select{width:116px}
.review input{width:118px}
.review button{background:#116af0;border:0;border-radius:8px;color:white;padding:9px}
.modal-layer{position:fixed;inset:0;background:#102046aa;display:flex;justify-content:center;align-items:center;z-index:10;padding:20px}
.modal{background:#fff;width:min(400px,100%);padding:35px;border-radius:25px;text-align:center;box-shadow:0 20px 80px #091b5477}
.modal .lock{font-size:50px}
.modal p{color:#687895}
.modal .inline-buttons{justify-content:center}
.close{background:none;border:0;margin-top:22px;color:#8690a9}
footer{text-align:center;padding:25px;color:#98a3ba;font-size:12px}
@media(max-width:1250px){.scene-left,.scene-right{width:150px;opacity:.92}
.shell{width:min(1160px,calc(100% - 46px))}}
@media(max-width:930px){.shell{width:calc(100% - 20px)}
.top{flex-wrap:wrap}
.search{order:3;max-width:100%;flex-basis:100%}
.scene-left,.scene-right{opacity:.22}
.browse{grid-template-columns:175px 1fr}
.hero-copy{max-width:72%}
.hero h1{font-size:26px}}
@media(max-width:650px){.shell{margin:8px auto;width:calc(100% - 12px);border-radius:14px}
.top{padding:15px}
.brand{min-width:auto}
.brand strong{font-size:21px}
.logo{font-size:31px}
.account{margin-left:auto}
.hello{display:none}
.nav{gap:13px;padding:10px}
.pagewrap{padding:11px}
.hero{min-height:243px}
.hero-copy{max-width:100%;padding:25px 18px}
.hero h1{font-size:26px}
.hero p{font-size:12px;max-width:63%}
.hero-pills{max-width:70%}
.hero-pills a{font-size:10px;padding:8px}
.hero-art{width:51%;opacity:.7}
.hero-spark{display:none}
.browse{display:block}
.filters{margin-bottom:15px}
.filters form{display:flex;flex-wrap:wrap;gap:0 12px}
.filters h3,.filters hr{flex-basis:100%;margin:10px 0}
.filters label{margin:6px 0}
.heading h2{font-size:21px}
.btn{padding:10px 9px;font-size:11px}
.detail,.panel-grid{grid-template-columns:1fr}
.detail-media img{min-height:160px}
.auth-card{padding:22px;margin:18px auto}
.fields{grid-template-columns:1fr}}
@media(max-width:400px){.brand small{display:none}
.nav{font-size:10px}
.account .btn{font-size:10px}}
.adminhint{margin-top:8px;color:#6d7c9f;font-size:12px;line-height:1.55;background:#f7f9ff;border:1px solid #e3ebfb;border-radius:12px;padding:10px 12px}
html,body{height:100%;overflow:hidden!important;background:#fff!important}
.scene{height:100dvh;min-height:0;overflow:hidden!important;background:#fff!important}
.scene-left,.scene-right{position:fixed!important;top:0!important;height:100dvh!important;bottom:0;z-index:0;background-size:cover;background-repeat:no-repeat}
.shell{height:calc(100dvh - 32px);min-height:0!important;overflow-y:auto!important;overflow-x:hidden!important;overscroll-behavior:contain;scrollbar-gutter:stable;scroll-behavior:smooth}
.shell::-webkit-scrollbar{width:9px}
.shell::-webkit-scrollbar-thumb{background:#bed2f9;border-radius:20px;border:2px solid #fff}
.class-landing{padding:16px 6px 30px}
.crumb{display:inline-block;margin:0 0 20px;color:#296ce8;font-weight:800;font-size:13px}
.class-header{padding:20px 25px;border-radius:22px;background:linear-gradient(105deg,#eaf5ff,#f4edff,#ffeef7)}
.class-header h2{font-size:30px;margin:0 0 5px}
.class-header p{color:#637597;margin:0}
.class-tabs{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}
.class-tab{border-radius:999px;padding:11px 23px;border:1px solid #dce5fa;background:white;color:#54678b;font-weight:800}
.class-tab.active,.class-tab:hover{color:white;background:linear-gradient(110deg,#2798ff,#8456f8);border-color:transparent}
.class-foot{margin-top:25px;display:flex;justify-content:center}
@media(max-width:950px){.shell{height:calc(100dvh - 16px)}}
@media(max-width:620px){.class-header h2{font-size:23px}
.shell{height:calc(100dvh - 12px)}
.class-tab{padding:9px 12px}}
.scene-left,.scene-right{width:clamp(82px,calc((100vw - 1020px)/2),310px)!important;background-size:cover!important;background-position:center top!important}
.shell{width:min(1170px,calc(100% - 2 * clamp(82px,calc((100vw - 1020px)/2),310px)))!important;min-width:0;scrollbar-gutter:stable}
@media(max-width:1050px){.scene-left,.scene-right{width:clamp(68px,9vw,115px)!important;opacity:.9!important}
.shell{width:calc(100% - 2 * clamp(68px,9vw,115px))!important}
.top{gap:9px;padding:13px 14px}
.brand{min-width:0}
.brand strong{font-size:20px}
.search{max-width:330px}
.browse{grid-template-columns:170px minmax(0,1fr)}}
@media(max-width:730px){.scene-left,.scene-right{width:35px!important;opacity:.65!important}
.shell{width:calc(100% - 70px)!important;margin:6px auto!important;height:calc(100dvh - 12px)!important}
.browse{display:block}
.top{flex-wrap:wrap}
.search{flex-basis:100%;max-width:none}}
.content-filter{display:grid!important;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px!important;margin:0 0 18px;align-items:end}
.content-filter .btn{align-self:end}
.editlink{color:#2167d8;font-weight:800}
.editlink:hover{text-decoration:underline}
.edit-panel{max-width:700px;margin:25px auto}
.edit-panel form{display:grid;gap:12px}
@media(max-width:730px){.content-filter{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:450px){.content-filter{grid-template-columns:1fr}}
.managed-items{display:grid;gap:10px;margin-top:15px}
.managed-item{display:grid;grid-template-columns:22px 82px minmax(0,1fr) auto;align-items:center;gap:13px;border:1px solid #e7eefa;border-radius:14px;background:#fff;padding:10px 13px;min-width:0}
.managed-item>img{width:82px;height:78px;object-fit:contain;background:linear-gradient(135deg,#edf8ff,#f7edff);border-radius:10px}
.managed-main{min-width:0;overflow:hidden}
.managed-main strong{display:block;overflow-wrap:anywhere;font-size:14px;line-height:1.4}
.managed-path,.managed-meta{font-size:11px;color:#71829e;line-height:1.6;overflow-wrap:anywhere;margin-top:4px}
.managed-edit{align-self:center}
.bulkbar,.tree-form,.block-form{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px;align-items:end;background:#f5f8ff;border-radius:14px;padding:15px;margin-top:14px}
.bulkbar>b{grid-column:1/-1}
.bulkbar input,.bulkbar select{padding:11px;border:1px solid #dce6fa;border-radius:10px;width:100%;min-width:0}
.tree-list{margin-top:15px;display:grid;gap:7px}
.tree-list details{border:1px solid #e1eafa;border-radius:11px;padding:10px}
.tree-list summary{cursor:pointer;font-weight:700}
.tree-topics{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tree-topics span{background:#eaf2ff;border-radius:20px;padding:5px 10px;font-size:12px}
.home-blocks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}
.home-block{display:flex;gap:14px;min-height:104px;padding:14px;background:#f1f7ff;border:1px solid #dce9ff;border-radius:16px}
.home-block.ad-block{background:#fff8ec;border-color:#fbe7c6}
.home-block>img{width:105px;object-fit:cover;border-radius:12px}
.home-block h3{font-size:16px;margin:4px 0}
.home-block p{font-size:12px;color:#62728e;margin:0}
.home-block a{font-size:12px;color:#1856ce;font-weight:800}
.block-label{font-size:10px;letter-spacing:.04em;color:#647ba8;font-weight:900;text-transform:uppercase}
.blocks-admin{display:grid;gap:7px;margin-top:16px}
.block-entry{display:flex;flex-wrap:wrap;align-items:center;gap:9px;padding:10px;border:1px solid #e4eafa;border-radius:12px}
.block-entry span{color:#7785a4;font-size:12px;margin-right:auto}
.block-entry form{display:block!important}
.block-entry .btn{padding:7px 10px}
@media(max-width:740px){.managed-item{grid-template-columns:19px 60px minmax(0,1fr);gap:8px}
.managed-item>img{width:60px;height:60px}
.managed-edit{grid-column:3;justify-self:start}
.home-blocks{grid-template-columns:1fr}}
.tags{min-height:26px!important}
.class-landing{padding-top:6px}
.class-landing .class-header h2{font-size:28px;line-height:1.15;margin:0 0 4px;color:#17306b}
.class-landing .class-foot{margin-top:16px}
.class-landing .class-foot .btn{min-height:46px;border-radius:14px}

/* EsraÖğretmenim V21: Single source of truth for category and material cards */
.class-landing { padding:10px 4px 28px; }
.class-landing .crumb{display:inline-flex;align-items:center;margin:0 0 12px;font-size:12px;font-weight:700;color:#2865d8;}
.class-landing .class-header{padding:15px 20px;margin:0 0 16px;border-radius:18px;background:linear-gradient(115deg,#eaf5ff,#fff0f7);}
.class-landing .class-header h2{font-size:25px;line-height:1.25;letter-spacing:-.4px;margin:0;color:#152d65;}
.class-landing .class-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;align-items:stretch;width:100%;}
.class-landing .class-card{min-width:0;display:flex;flex-direction:column;align-items:stretch;padding:0;margin:0;background:#fff;border:1px solid #e7ecf8;border-radius:17px;overflow:hidden;box-shadow:0 7px 22px rgba(26,59,115,.085);transition:transform .2s,box-shadow .2s;text-align:left;}
.class-landing .class-card:hover,.class-landing .class-card:focus-visible{transform:translateY(-3px);box-shadow:0 12px 29px rgba(26,59,115,.15);outline-offset:3px;}
.class-landing .class-illustration{display:block;width:100%;aspect-ratio:1.41/1;overflow:hidden;background:var(--card-tint,#f1f6ff);flex:none;}
.class-landing .class-illustration img{display:block;width:100%;height:100%;max-width:100%;max-height:100%;object-fit:contain;object-position:center center;}
.class-landing .class-card-body{position:relative;box-sizing:border-box;display:flex;flex:1 1 auto;flex-direction:column;min-width:0;padding:13px 14px 14px;background:#fff;min-height:113px;}
.class-landing .class-card-body strong{display:block;color:#16336a;font-size:17px;font-weight:900;line-height:1.3;min-height:25px;margin:0 0 6px;overflow-wrap:break-word;white-space:normal;text-align:left;}
.class-landing .class-card-body .class-card-sub{display:block;color:#78839b;font-size:12px;line-height:1.45;overflow-wrap:break-word;white-space:normal;margin:0;padding:0 36px 0 0;text-align:left;}
.class-landing .class-card-body .class-card-go{position:absolute;right:12px;bottom:12px;width:33px;height:33px;display:flex;align-items:center;justify-content:center;border-radius:100%;background:var(--accent,#278afe);color:#fff;font-weight:900;font-size:19px;line-height:1;box-shadow:0 5px 13px rgba(29,85,155,.12);margin:0;}
.class-landing .class-foot{margin:18px 0 0;display:flex;justify-content:center;}
/* A4 portrait document previews, separate from square-corner lesson illustrations */
.browse .cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;align-items:stretch;}
.browse .material-card{min-width:0;display:flex;flex-direction:column;border:1px solid #e6edfa;border-radius:16px;background:#fff;box-shadow:0 7px 22px rgba(29,60,118,.09);overflow:hidden;}
.browse .cover{height:auto;aspect-ratio:1/1.34;display:flex;align-items:center;justify-content:center;padding:12px;position:relative;background:linear-gradient(155deg,#f4f9ff,#fff0fa);overflow:hidden;}
.browse .cover img{display:block;width:100%;height:100%;max-width:100%;max-height:100%;object-fit:contain;object-position:center;background:transparent;margin:0;padding:0;mix-blend-mode:normal;}
.browse .cover .popular{position:absolute;top:9px;left:9px;border-radius:100px;padding:5px 9px;background:#fff;color:#7551c5;font-size:10px;font-weight:800;box-shadow:0 4px 12px rgba(25,60,115,.12);}
.browse .cardinfo{display:flex;flex:1;flex-direction:column;padding:12px;}
.browse .cardinfo h3{font-size:14px;line-height:1.36;font-weight:800;margin:10px 0 4px;min-height:38px;color:#16356d;overflow-wrap:anywhere;}
.browse .card-author{color:#96a1b5;margin:0;font-size:11px;min-height:28px;}
.browse .stats{display:flex;justify-content:space-between;flex-wrap:wrap;gap:7px;margin:auto 0 10px;padding-top:12px;color:#7787a3;font-size:11px;}
.browse .material-card .btn{width:100%;min-height:39px;margin:0;}
@media(max-width:1040px){
 .class-landing .class-cards{grid-template-columns:repeat(3,minmax(0,1fr));gap:13px;}
}
@media(max-width:760px){
 .class-landing .class-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px;}
 .class-landing .class-header h2{font-size:22px;}
 .class-landing .class-card-body{min-height:112px;padding:11px 12px 13px;}
 .class-landing .class-card-body strong{font-size:15px;}
 .class-landing .class-card-body .class-card-sub{font-size:11px;}
 .browse .cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px;}
}
@media(max-width:450px){
 .class-landing .class-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;}
 .class-landing .class-card{border-radius:13px;}
 .class-landing .class-card-body{padding:9px 9px 12px;min-height:106px;}
 .class-landing .class-card-body strong{font-size:13px;}
 .class-landing .class-card-body .class-card-sub{font-size:10px;padding-right:27px;}
 .class-landing .class-card-body .class-card-go{right:8px;bottom:9px;width:26px;height:26px;font-size:15px;}
 .browse .cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;}
 .browse .cardinfo{padding:9px;}
 .browse .cardinfo h3{font-size:12px;min-height:34px;}
 .browse .cover{padding:7px;}
}