:root{--bg:#07111f;--panel:#0c192b;--panel2:#101f33;--line:#1d314a;--text:#eef5ff;--muted:#91a4bb;--cyan:#28d8ff;--green:#35e0a1;--red:#ff667a;--shadow:0 20px 60px rgba(0,0,0,.28)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:radial-gradient(circle at 75% -10%,#123354 0,#07111f 38%);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}button,input,select{font:inherit}button{cursor:pointer}body{overflow-x:hidden}
.app{min-height:100vh;display:flex}.sidebar{width:270px;position:fixed;left:0;top:0;bottom:0;background:rgba(6,15,28,.94);border-right:1px solid var(--line);padding:26px 18px;display:flex;flex-direction:column;z-index:20;backdrop-filter:blur(16px)}.brand{display:flex;align-items:center;gap:11px;padding:0 10px 24px}.brand-icon{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--cyan),#5574ff);display:grid;place-items:center;color:#04111c;font-weight:900;font-size:20px;box-shadow:0 10px 30px rgba(40,216,255,.18)}.brand strong{display:block;letter-spacing:2px;font-size:14px}.brand span{display:block;color:var(--muted);font-size:10px;letter-spacing:3px;margin-top:2px}.dataset{border:1px solid var(--line);background:linear-gradient(135deg,rgba(40,216,255,.08),rgba(53,224,161,.04));padding:13px 14px;border-radius:14px;margin:0 0 20px}.dataset b{display:block;font-size:13px}.dataset span{display:block;color:var(--muted);font-size:11px;margin-top:4px;line-height:1.45}.nav{display:grid;gap:8px}.nav-btn{border:1px solid transparent;background:transparent;color:#b9c8d9;text-align:left;padding:14px 13px;border-radius:12px;display:flex;align-items:center;gap:12px;font-weight:700}.nav-btn span{font-size:10px;color:#5f748d;letter-spacing:1px}.nav-btn:hover{background:#0d1b2d;color:#fff}.nav-btn.active{background:linear-gradient(90deg,rgba(40,216,255,.14),rgba(40,216,255,.03));border-color:#21425e;color:#fff;box-shadow:inset 3px 0 0 var(--cyan)}.nav-btn.active span{color:var(--cyan)}.side-footer{margin-top:auto;color:#647990;font-size:10px;line-height:1.7;padding:12px 10px}
.main{margin-left:270px;min-height:100vh;width:calc(100% - 270px)}.topbar{height:78px;border-bottom:1px solid rgba(29,49,74,.7);display:flex;align-items:center;justify-content:space-between;padding:0 34px;position:sticky;top:0;background:rgba(7,17,31,.78);backdrop-filter:blur(16px);z-index:10}.kicker{font-size:9px;letter-spacing:2.5px;color:var(--cyan);font-weight:800}.crumb{font-size:20px;font-weight:800;margin-top:3px}.top-stat{font-size:12px;color:#b9c8d9;border:1px solid var(--line);padding:8px 12px;border-radius:999px;background:#0b1829}.menu{display:none;background:none;border:0;color:#fff;font-size:22px}.screen{max-width:1320px;margin:0 auto;padding:34px}
.hero{display:grid;grid-template-columns:1.4fr .6fr;gap:18px;margin-bottom:26px}.hero-panel{background:linear-gradient(135deg,#10243b,#0c1829);border:1px solid var(--line);border-radius:22px;padding:34px;box-shadow:var(--shadow);position:relative;overflow:hidden}.hero-panel:after{content:"";position:absolute;width:260px;height:260px;border-radius:50%;right:-100px;top:-130px;background:rgba(40,216,255,.12);filter:blur(3px)}.eyebrow{color:var(--cyan);font-size:10px;font-weight:900;letter-spacing:2px;text-transform:uppercase}.hero h1{font-size:40px;line-height:1.06;margin:12px 0}.hero p{color:var(--muted);max-width:700px;line-height:1.65}.stats{display:flex;gap:28px;margin-top:24px}.stat b{font-size:27px;display:block}.stat span{font-size:11px;color:var(--muted)}.quick-panel{display:flex;flex-direction:column;justify-content:center}.quick-panel .big{font-size:25px;font-weight:850;margin:9px 0}.quick-panel p{font-size:13px}.btn{border:1px solid #2c5873;background:linear-gradient(135deg,#16c9ee,#357cff);color:#04111c;padding:10px 15px;border-radius:10px;font-weight:850;box-shadow:0 8px 25px rgba(40,216,255,.12)}.btn:hover{filter:brightness(1.08);transform:translateY(-1px)}.btn.secondary{background:#122338;color:#dce9f7;border-color:#29445e;box-shadow:none}.btn.ghost{background:transparent;color:#b9c8d9;border-color:var(--line);box-shadow:none}.btn.danger{background:transparent;color:#ff8b99;border-color:#5c2936;box-shadow:none}.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:28px 0 15px}.section-head h2{font-size:20px;margin:0}.muted{color:var(--muted);font-size:12px;line-height:1.5}.cards,.test-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.card{background:rgba(13,27,45,.88);border:1px solid var(--line);border-radius:16px;padding:18px}.subject-card{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:115px}.subject-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:#112941;border:1px solid #244761;color:var(--cyan);font-weight:900;margin-bottom:11px}.subject-card h3,.test-card h3{margin:0 0 5px;font-size:15px}.subject-card p,.test-card p{margin:0;color:var(--muted);font-size:11px}.test-card{display:flex;flex-direction:column;min-height:178px}.tag-row{display:flex;gap:7px;margin-bottom:10px}.tag{font-size:9px;color:#9eb2c7;border:1px solid #243a52;padding:5px 7px;border-radius:999px}.tag.cyan{color:#68e6ff;border-color:#24566d}.test-card h3{font-size:15px;line-height:1.4;flex:1}.actions{display:flex;gap:8px;margin-top:14px}.actions .btn{flex:1}.toolbar{display:flex;gap:10px;margin:16px 0}.search,.select{width:100%;background:#0c192b;border:1px solid var(--line);color:#eaf2fc;border-radius:11px;padding:12px 13px;outline:none}.select{max-width:220px}.search:focus,.select:focus{border-color:#2b6885;box-shadow:0 0 0 3px rgba(40,216,255,.06)}.empty{border:1px dashed #29435c;border-radius:16px;padding:50px;text-align:center;color:var(--muted)}.notice{border:1px solid #28425a;background:#0c1c2e;padding:11px 13px;border-radius:10px;color:#a9bdd1;font-size:12px;line-height:1.55;margin:14px 0}.footer-space{height:80px}
.quiz-layer{position:fixed;inset:0;background:rgba(2,8,16,.88);backdrop-filter:blur(10px);z-index:50;overflow:auto;padding:30px}.quiz-box{max-width:900px;margin:0 auto;background:#0a1727;border:1px solid #27415b;border-radius:22px;box-shadow:0 30px 100px rgba(0,0,0,.5);min-height:calc(100vh - 60px);padding:25px}.quiz-top{display:flex;justify-content:space-between;align-items:center;gap:15px;border-bottom:1px solid var(--line);padding-bottom:18px}.quiz-title{font-weight:850}.quiz-count{font-size:12px;color:var(--muted)}.bar{height:6px;background:#14283d;border-radius:999px;margin:18px 0 25px;overflow:hidden}.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--cyan),var(--green));border-radius:999px}.q-card{background:#0d1c2d;border:1px solid #20384f;border-radius:16px;padding:22px}.q-meta{font-size:10px;color:#71869c;margin-bottom:12px}.q-text{font-size:18px;line-height:1.65}.q-text img,.answer img{max-width:100%;height:auto;border-radius:10px}.options{display:grid;gap:10px;margin-top:20px}.option{display:flex;gap:12px;align-items:flex-start;text-align:left;width:100%;background:#0a1726;border:1px solid #20384f;color:#dce7f3;padding:13px;border-radius:12px;line-height:1.5}.option:hover{border-color:#35627e;background:#0e2034}.option.selected{border-color:#2c9fc0;background:#0c2a3b}.option.correct{border-color:#278a6d;background:#0d2b26}.option.wrong{border-color:#9b3e4f;background:#2a1018}.letter{width:28px;height:28px;flex:0 0 28px;border-radius:8px;background:#142b42;display:grid;place-items:center;font-size:11px;font-weight:900;color:#9db4ca}.option.correct .letter{background:#1d6e58;color:#d8fff1}.option.wrong .letter{background:#773040;color:#ffe1e5}.quiz-actions{display:flex;justify-content:space-between;gap:10px;margin-top:20px}.quiz-actions .right{display:flex;gap:8px}.result{max-width:700px;margin:70px auto;text-align:center}.result-score{font-size:72px;font-weight:950;letter-spacing:-4px;background:linear-gradient(135deg,var(--cyan),var(--green));-webkit-background-clip:text;color:transparent}.result h1{font-size:28px}.result p{color:var(--muted);line-height:1.6}.review{margin-top:25px;text-align:left}.review-item{border:1px solid var(--line);background:#0c1929;border-radius:12px;padding:13px;margin:9px 0;font-size:12px}.review-item.good{border-color:#236f5b}.review-item.bad{border-color:#713240}.hidden{display:none!important}.mobile-close{display:none}
@media(max-width:1050px){.cards,.test-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{grid-template-columns:1fr}.sidebar{width:235px}.main{margin-left:235px;width:calc(100% - 235px)}}
@media(max-width:760px){.sidebar{transform:translateX(-100%);transition:.2s;width:270px}.sidebar.open{transform:translateX(0)}.main{margin-left:0;width:100%}.topbar{padding:0 17px}.menu{display:block}.screen{padding:20px 14px}.cards,.test-grid{grid-template-columns:1fr}.hero-panel{padding:24px}.hero h1{font-size:31px}.stats{gap:18px}.toolbar{flex-direction:column}.select{max-width:none}.quiz-layer{padding:10px}.quiz-box{min-height:calc(100vh - 20px);padding:17px}.q-text{font-size:16px}.quiz-top{align-items:flex-start}.quiz-actions{flex-wrap:wrap}.quiz-actions .right{width:100%}.quiz-actions .right .btn{flex:1}.result-score{font-size:58px}}