:root{--bc-blue:#146df5;--bc-dark:#14213d;--bc-orange:#ff7a1a;--bc-green:#26b96f;--bc-bg:#f6f9ff;--bc-muted:#6b7280}
*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Arial,sans-serif;background:var(--bc-bg);color:#1f2937}a{text-decoration:none;color:inherit}.container{width:min(1160px,94%);margin:auto}.topbar{background:#fff;border-bottom:1px solid #e5e7eb;position:sticky;top:0;z-index:30}.nav{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:20px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:24px;color:var(--bc-dark)}.brand img{height:42px}.navlinks{display:flex;gap:18px;align-items:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;padding:11px 18px;font-weight:700;cursor:pointer}.btn-primary{background:var(--bc-blue);color:white}.btn-orange{background:var(--bc-orange);color:white}.btn-light{background:#eef4ff;color:var(--bc-blue)}.hero{padding:58px 0;background:linear-gradient(135deg,#fff,#eef7ff)}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}.hero h1{font-size:54px;line-height:1.03;margin:0 0 16px;color:var(--bc-dark)}.hero h1 span{color:var(--bc-blue)}.hero p{font-size:19px;color:var(--bc-muted);max-width:680px}.hero-card{background:#fff;border-radius:24px;padding:24px;box-shadow:0 18px 50px rgba(34,75,140,.12)}.grid{display:grid;gap:18px}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.card{background:#fff;border:1px solid #e7ebf3;border-radius:18px;padding:20px;box-shadow:0 8px 24px rgba(32,58,96,.06)}.card h3{margin-top:0}.metric{font-size:32px;font-weight:800}.section{padding:40px 0}.form-group{margin-bottom:16px}.label{display:block;font-weight:700;margin-bottom:7px}.input,select,textarea{width:100%;padding:12px 14px;border:1px solid #d6dce7;border-radius:11px;background:#fff;font:inherit}.input:focus,select:focus,textarea:focus{outline:2px solid #cfe0ff;border-color:var(--bc-blue)}.login-wrap{max-width:500px;margin:52px auto}.alert{padding:12px 14px;border-radius:10px;margin:12px 0}.alert-danger{background:#fff0f0;color:#a61b1b}.alert-success{background:#eafaf1;color:#176b40}.dashboard{display:grid;grid-template-columns:230px 1fr;min-height:calc(100vh - 68px)}.sidebar{background:#fff;border-right:1px solid #e7ebf3;padding:20px}.sidebar a{display:block;padding:11px 12px;border-radius:10px;margin:4px 0}.sidebar a:hover{background:#eff5ff;color:var(--bc-blue)}.content{padding:26px}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse;background:#fff}.table th,.table td{padding:12px;border-bottom:1px solid #edf0f5;text-align:left}.badge{display:inline-block;padding:5px 9px;border-radius:99px;background:#eef4ff;color:var(--bc-blue);font-size:12px;font-weight:800}.option{display:flex;align-items:center;gap:12px;padding:14px;border:1px solid #dfe4ec;border-radius:12px;margin:10px 0;background:#fff}.option:has(input:checked){background:linear-gradient(90deg,#146df5,#1897f5);color:#fff;border-color:transparent}.timer{background:#17233c;color:white;border-radius:10px;padding:8px 12px;font-size:22px;font-weight:800}.progress{height:10px;background:#e9eef7;border-radius:99px;overflow:hidden}.progress>span{display:block;height:100%;background:var(--bc-green)}.voice-btn{margin-top:8px}.rich-editor{min-height:140px;background:#fff;border:1px solid #d6dce7;border-radius:11px;padding:12px}.toolbar{display:flex;gap:6px;margin:8px 0}.toolbar button{border:1px solid #d6dce7;background:#fff;border-radius:8px;padding:7px 10px}.check-row{display:flex;align-items:center;gap:10px;padding:12px;background:#fff;border-radius:12px;margin-bottom:8px}.done{text-decoration:line-through;color:#7b8492}
@media(max-width:900px){.hero-grid,.grid-4,.grid-3{grid-template-columns:1fr 1fr}.dashboard{grid-template-columns:1fr}.sidebar{display:flex;overflow:auto;gap:6px;border-right:0;border-bottom:1px solid #e7ebf3}.sidebar a{white-space:nowrap}.hero h1{font-size:42px}.navlinks a.hide-mobile{display:none}}
@media(max-width:600px){.hero-grid,.grid-4,.grid-3{grid-template-columns:1fr}.hero{padding:32px 0}.hero h1{font-size:36px}.content{padding:16px}.nav{min-height:60px}.brand{font-size:20px}.brand img{height:36px}.btn{padding:10px 14px}.table th,.table td{padding:9px;font-size:13px}}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:600px){.grid-2{grid-template-columns:1fr}}

/* magazine */
.feature-link{display:block;transition:.25s transform,.25s box-shadow}.feature-link:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(22,50,100,.10)}
.magazine-home{padding:28px 0 40px}
.magazine-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:center;margin-bottom:18px;background:linear-gradient(135deg,#fefefe,#eff6ff);overflow:hidden}
.magazine-hero.compact{grid-template-columns:1fr auto}
.magazine-hero h1{font-size:48px;line-height:1.06;margin:8px 0 12px;color:#11284f}.magazine-hero h1 span{color:var(--bc-blue)}
.magazine-hero p{color:#5f6f87;font-size:18px;line-height:1.7;margin:0 0 16px}
.magazine-hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.mag-hero-art{display:flex;justify-content:center}.mag-hero-card{width:min(100%,380px);min-height:290px;border-radius:28px;background:linear-gradient(145deg,#1f59d9,#39a8ff);padding:20px;position:relative;overflow:hidden;box-shadow:0 18px 45px rgba(20,75,160,.22)}
.mag-hero-card:before,.mag-hero-card:after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.15)}.mag-hero-card:before{width:180px;height:180px;right:-40px;top:-40px}.mag-hero-card:after{width:140px;height:140px;left:-25px;bottom:-25px}
.mag-hero-badge{display:inline-flex;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.24);color:#fff;padding:8px 14px;border-radius:999px;font-weight:700}
.mag-hero-book{margin-top:18px;height:205px;border-radius:18px;background:linear-gradient(135deg,#fff6db,#ffffff);position:relative;box-shadow:inset 0 0 0 6px rgba(255,255,255,.35),0 14px 30px rgba(14,35,80,.18)}
.mag-hero-book:before{content:"BrainCheck Kids\A Magazine";white-space:pre;position:absolute;left:26px;top:26px;font-weight:900;font-size:34px;line-height:1.1;color:#17305f}.mag-hero-book:after{content:"Read • Learn • Explore";position:absolute;left:28px;bottom:24px;font-size:16px;font-weight:700;color:#ff7a1a}
.magazine-strip{display:flex;gap:12px;flex-wrap:wrap;margin:0 0 18px}
.magazine-layout{display:grid;grid-template-columns:320px 1fr;gap:18px;align-items:start}
.magazine-sidebar{position:sticky;top:84px}.magazine-side-title{font-size:20px;font-weight:800;color:#12294d;margin-bottom:14px}
.mag-thumb{width:100%;display:flex;align-items:center;gap:12px;padding:12px;border:1px solid #dbe5f4;border-radius:16px;background:#fff;margin-bottom:10px;cursor:pointer;text-align:left;transition:.2s}.mag-thumb:hover{transform:translateY(-2px);box-shadow:0 10px 20px rgba(28,60,100,.08)}.mag-thumb.active{border-color:#146df5;background:#eef4ff}.mag-thumb-img{width:74px;height:74px;border-radius:14px;overflow:hidden;flex:0 0 74px;background:#f7fbff}.mag-thumb-img img{width:100%;height:100%;object-fit:cover}.mag-thumb-text strong{display:block;color:#152b50;margin-bottom:4px;font-size:15px}.mag-thumb-text span{display:block;color:#6d7a8f;font-size:12px;line-height:1.45}
.magazine-reader-wrap{min-width:0}.issue-wrap{display:none}.issue-wrap.active{display:block}
.issue-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:14px}.issue-head h2{font-size:30px;margin:8px 0;color:#10284c}.issue-head p{margin:0;color:#5e7088;line-height:1.65}.issue-meta{background:#fff;border:1px solid #dbe6f6;border-radius:16px;padding:14px 16px;display:flex;flex-direction:column;gap:6px;min-width:180px}.issue-meta strong{font-size:18px;color:#183566}.issue-meta span{font-size:14px;color:#72829a}
.flipbook{position:relative;min-height:620px;perspective:1400px}.mag-page{display:none}.mag-page.active{display:block;animation:magFade .38s ease}.mag-page.left,.mag-page.right{display:none}
@keyframes magFade{from{opacity:.4;transform:rotateY(10deg) translateX(15px)}to{opacity:1;transform:rotateY(0deg) translateX(0)}}
.mag-page-inner{background:#fff;border:1px solid #dfe8f6;border-radius:24px;min-height:580px;padding:28px;box-shadow:0 18px 35px rgba(26,53,89,.08);position:relative;overflow:hidden}.mag-page-inner:before{content:"";position:absolute;top:0;left:0;bottom:0;width:12px;background:linear-gradient(180deg,var(--accent,#146df5),rgba(20,109,245,.08))}.cover .mag-page-inner{background:linear-gradient(135deg,#ffffff,#f4f8ff)}
.cover-inner{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:center}.cover-visual{background:linear-gradient(135deg,#f3fbff,#fffdf1);border-radius:24px;padding:18px;box-shadow:inset 0 0 0 1px #e8eff9}.cover-visual img{width:100%;height:100%;max-height:420px;object-fit:cover;border-radius:18px}.cover-content h3{font-size:38px;line-height:1.15;margin:12px 0;color:#13284d}.cover-content p{font-size:18px;line-height:1.7;color:#5f6d84}.cover-tag{display:inline-flex;background:rgba(20,109,245,.1);color:var(--accent,#146df5);padding:8px 14px;border-radius:999px;font-weight:800}.cover-points{margin:18px 0 0;padding-left:18px;color:#20375e;font-weight:600;line-height:1.8}
.page-ribbon{display:inline-flex;padding:7px 12px;border-radius:999px;background:rgba(20,109,245,.08);color:var(--accent,#146df5);font-size:12px;font-weight:800;margin-bottom:14px}.mag-page-inner h1,.mag-page-inner h2,.mag-page-inner h3,.mag-page-inner h4{color:#112a4b;margin:0 0 12px}.mag-page-inner p,.mag-page-inner li{font-size:18px;line-height:1.8;color:#334155}.mag-page-inner img{max-width:100%;border-radius:18px;margin:12px 0}.mag-page-inner ul{padding-left:22px}
.flip-controls{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-top:16px;flex-wrap:wrap}.flip-status{font-weight:800;color:#143362;background:#fff;padding:10px 16px;border-radius:999px;border:1px solid #dfe8f6}.muted{color:#6a7991}.split{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.toolbar-bottom{margin-top:8px}.rich-mag-editor{min-height:220px}.admin-sidebar a.active{background:#eff5ff;color:var(--bc-blue);font-weight:700}
@media(max-width:1000px){.magazine-layout{grid-template-columns:1fr}.magazine-sidebar{position:relative;top:auto}.cover-inner,.magazine-hero{grid-template-columns:1fr}.magazine-hero.compact{grid-template-columns:1fr}.issue-head{flex-direction:column}.flipbook{min-height:unset}.mag-page-inner{min-height:500px}}
@media(max-width:700px){.magazine-home{padding-top:14px}.magazine-hero h1{font-size:34px}.issue-head h2{font-size:26px}.mag-page-inner{padding:18px;border-radius:18px}.mag-page-inner p,.mag-page-inner li{font-size:16px}.cover-content h3{font-size:30px}.mag-thumb{padding:10px}.mag-thumb-img{width:62px;height:62px;flex-basis:62px}.flip-controls{justify-content:center}.magazine-side-title{font-size:18px}}