:root{color:#101828;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;background:#f5f7fb;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100dvh;margin:0}button,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}.app-shell{width:min(1180px,100%);margin:0 auto;padding:20px}.hero{color:#fff;background:radial-gradient(circle at 100% 0,#2563eb29,#0000 34%),linear-gradient(135deg,#101828 0%,#172554 100%);border:1px solid #d9e2f2;border-radius:24px;gap:20px;padding:24px;display:grid}.eyebrow,.section-title p{color:#7dd3fc;letter-spacing:.08em;text-transform:uppercase;margin:0;font-size:.78rem;font-weight:800}.hero h1{letter-spacing:0;margin:10px 0 8px;font-size:clamp(2.5rem,12vw,5.8rem);line-height:.92}.hero-copy{color:#dbeafe;max-width:680px;margin:0;font-size:1rem;line-height:1.6}.hero-actions,.study-actions{flex-wrap:wrap;gap:10px;margin-top:20px;display:flex}.hero-actions button,.study-actions button,.footer-actions button{color:#082f49;background:#38bdf8;border:0;border-radius:14px;min-height:48px;padding:0 18px;font-weight:900}button.secondary,.hero-actions .secondary,.study-actions .secondary{color:#fff;background:#ffffff1f;border:1px solid #fff3}.level-card{background:#ffffff1a;border:1px solid #ffffff29;border-radius:20px;flex-direction:column;justify-content:center;align-self:stretch;gap:8px;padding:18px;display:flex}.level-card span,.level-card small{color:#dbeafe;font-size:.85rem}.level-card strong{font-size:2rem}progress{background:#e5e7eb;border:0;border-radius:999px;width:100%;height:10px;overflow:hidden}progress::-webkit-progress-bar{background:#e5e7eb}progress::-webkit-progress-value{background:#22c55e}progress::-moz-progress-bar{background:#22c55e}.stats-grid,.mini-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:16px 0;display:grid}.stat-card,.panel,.mode-card,.question-card,.flashcard{background:#ffffffe6;border:1px solid #d9e2f2;border-radius:20px;box-shadow:0 16px 40px #1018280f}.stat-card{padding:16px}.stat-card span,.stat-card small{color:#667085;font-size:.8rem;display:block}.stat-card strong{margin-top:6px;font-size:1.6rem;display:block}.version-stats .stat-card strong{font-size:1.2rem}.panel{margin-top:16px;padding:18px}.section-title h2{margin:4px 0 16px;font-size:1.25rem}.subjects-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.subject-pill{text-align:left;color:#101828;background:#fff;border:1px solid #d9e2f2;border-radius:16px;min-height:74px;padding:12px;transition:transform .16s,border-color .16s,background .16s}.subject-pill.active{border-color:var(--subject,#101828);background:var(--subject-soft,#eef2ff)}.subject-pill:hover,.mode-card:hover,.subject-list button:hover{transform:translateY(-1px)}.subject-pill span,.subject-pill small{display:block}.subject-pill span{font-weight:900}.subject-pill small{color:#667085;margin-top:4px}.filter-grid{gap:12px;margin-top:16px;display:grid}label{color:#344054;gap:6px;font-size:.84rem;font-weight:800;display:grid}select{color:#101828;background:#fff;border:1px solid #cbd5e1;border-radius:12px;width:100%;min-height:48px;padding:0 12px}.available-row{color:#667085;align-items:baseline;gap:8px;margin:14px 2px;display:flex}.available-row strong{color:#101828;font-size:1.5rem}.app-tabs{z-index:10;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#fffffff0;border:1px solid #d9e2f2;border-radius:18px;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;margin:16px 0 4px;padding:6px;display:grid;position:sticky;top:0;box-shadow:0 10px 30px #10182814}.app-tabs button{color:#667085;background:0 0;border:0;border-radius:13px;min-height:44px;font-size:.85rem;font-weight:950}.app-tabs button.active{color:#fff;background:#101828}.tab-panel{gap:16px;display:grid}.tab-panel>.panel{margin-top:12px}.mode-grid{gap:12px;display:grid}.mode-card{text-align:left;color:#101828;border-color:#d9e2f2;min-height:112px;padding:18px}.mode-card span{color:#2563eb;font-size:1.2rem;font-weight:950;display:block}.mode-card strong{color:#475467;margin-top:8px;line-height:1.45;display:block}.dashboard-grid{gap:16px;display:grid}.mission-list,.weak-list,.subject-list,.resource-grid{gap:10px;display:grid}.mission,.weak-list div,.subject-list button,.achievement{background:#f8fafc;border:1px solid #e4e7ec;border-radius:14px;padding:12px}.mission div,.weak-list div,.subject-list button{justify-content:space-between;align-items:center;gap:12px;display:flex}.mission strong,.weak-list span,.subject-list strong{color:#101828}.mission span,.weak-list strong,.subject-list small{color:#667085}.subject-list em{color:#2563eb;margin-top:5px;font-size:.78rem;font-style:normal;font-weight:900;display:block}.mission progress{margin-top:10px}.weak-list h3{margin:0 0 8px;font-size:1rem}.weak-list p{color:#667085;margin:0;line-height:1.6}.achievement-grid{gap:10px;display:grid}.achievement{opacity:.65}.achievement.unlocked{opacity:1;background:#f0fdf4;border-color:#86efac}.achievement span{color:#667085;text-transform:uppercase;font-size:.76rem;font-weight:800;display:block}.achievement strong{margin-top:5px;display:block}.subject-list button{text-align:left;width:100%;min-height:68px}.subject-list button>span{border-radius:999px;flex:none;width:12px;height:44px}.subject-list button>div{flex:1}.resources-panel{margin-top:12px;overflow:hidden}.resource-subject{background:linear-gradient(180deg, var(--resource-soft,#f8fafc) 0%, #fff 100%);border:1px solid #e4e7ec;border-radius:18px;gap:16px;min-width:0;padding:16px;display:grid}.resource-subject-head{align-items:flex-start;gap:12px;display:flex}.resource-subject-head>span{background:var(--resource-color,#2563eb);border-radius:999px;flex:none;width:12px;height:56px}.resource-subject-head p,.resource-subject-head h3,.resource-subject-head small{margin:0}.resource-subject-head p{color:var(--resource-color,#2563eb);letter-spacing:.08em;text-transform:uppercase;font-size:.76rem;font-weight:900}.resource-subject-head h3{margin-top:4px;font-size:1.08rem}.resource-subject-head small{color:#667085;margin-top:4px;display:block}.resource-tests{flex-wrap:wrap;gap:8px;display:flex}.resource-tests button{color:#fff;background:#101828;border:0;border-radius:999px;min-height:40px;padding:0 13px;font-size:.82rem;font-weight:900}.resource-sections,.resource-kind-list{gap:10px;display:grid}.resource-kind h4{color:#344054;letter-spacing:.08em;text-transform:uppercase;margin:0 0 6px;font-size:.82rem}.resource-item{background:#ffffffd1;border:1px solid #e4e7ec;border-radius:16px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px 14px;min-width:0;padding:12px;display:grid}.resource-thumb{aspect-ratio:1;background:#fff;border:1px solid #d9e2f2;border-radius:12px;grid-row:span 2;width:72px;overflow:hidden}.resource-thumb img{object-fit:cover;width:100%;height:100%}.resource-copy span{color:var(--resource-color,#2563eb);letter-spacing:.08em;text-transform:uppercase;font-size:.76rem;font-weight:900;display:block}.resource-copy h3{margin:6px 0;font-size:.98rem}.resource-copy p{color:#475467;margin:0;font-size:.9rem;line-height:1.45}.resource-image{background:#fff;border:1px solid #d9e2f2;border-radius:14px;max-height:360px;display:block;overflow:hidden}.resource-image img{width:100%;height:auto;display:block}.resource-item audio,.resource-item video{grid-column:1/-1;width:100%}.resource-item video{background:#101828;border:1px solid #d9e2f2;border-radius:14px;max-height:340px;display:block}.resource-document{color:#101828;background:#ffffffb8;border:1px dashed #94a3b8;border-radius:14px;align-content:center;gap:6px;min-height:120px;padding:18px;text-decoration:none;display:grid}.resource-document strong{color:var(--resource-color,#2563eb);font-size:1.8rem}.resource-document span{color:#475467;font-weight:800}.resource-link{color:#fff;white-space:nowrap;background:#101828;border-radius:12px;justify-self:end;align-items:center;min-height:42px;padding:0 13px;font-size:.82rem;font-weight:900;text-decoration:none;display:inline-flex}.resource-empty{color:#667085;border:1px dashed #cbd5e1;border-radius:14px;margin:0;padding:14px;line-height:1.55}.version-panel{gap:14px;display:grid}.version-head{justify-content:space-between;align-items:flex-start;gap:14px;display:flex}.version-head strong,.version-head span{display:block}.version-head strong{font-size:1.15rem}.version-head span,.version-panel p{color:#667085;line-height:1.55}.version-head a{color:#fff;background:#101828;border-radius:999px;align-items:center;min-height:40px;padding:0 14px;font-size:.82rem;font-weight:900;text-decoration:none;display:inline-flex}.version-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.version-list{color:#344054;margin:0;padding-left:18px;line-height:1.6}.version-types{flex-wrap:wrap;gap:8px;display:flex}.version-types span{color:#2563eb;background:#eff6ff;border-radius:999px;padding:7px 10px;font-size:.78rem;font-weight:900}.footer-actions{justify-content:center;padding:24px 0 8px;display:flex}.footer-actions .danger{color:#991b1b;background:#fee2e2}.study-shell{flex-direction:column;justify-content:center;width:min(900px,100%);min-height:100dvh;margin:0 auto;padding:18px;display:flex}.study-topbar{justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.study-topbar button{color:#101828;background:#fff;border:1px solid #cbd5e1;border-radius:12px;min-height:44px;padding:0 14px;font-weight:800}.study-topbar span{color:#667085;font-weight:800}.question-card,.flashcard{padding:20px}.question-meta{flex-wrap:wrap;gap:8px;display:flex}.question-meta span{color:#475467;background:#eef2ff;border-radius:999px;padding:6px 10px;font-size:.76rem;font-weight:900}.question-card h1,.flashcard h1{margin:18px 0;font-size:clamp(1.5rem,6vw,2.6rem);line-height:1.15}.options{gap:10px;display:grid}.options button{color:#101828;text-align:left;background:#fff;border:1px solid #d9e2f2;border-radius:14px;align-items:center;gap:12px;width:100%;min-height:58px;padding:12px;line-height:1.35;display:flex}.options button span{color:#2563eb;background:#eff6ff;border-radius:50%;flex:none;justify-content:center;align-items:center;width:32px;height:32px;font-weight:950;display:flex}.options button.correct{background:#f0fdf4;border-color:#22c55e}.options button.wrong{background:#fef2f2;border-color:#ef4444}.answer-box{border-radius:16px;margin-top:16px;padding:14px;line-height:1.55}.answer-box.ok{background:#f0fdf4;border:1px solid #86efac}.answer-box.bad{background:#fef2f2;border:1px solid #fecaca}.answer-box p,.flashcard p{color:#344054;margin:8px 0 0;line-height:1.65}.flashcard small{text-transform:uppercase;letter-spacing:.06em;font-weight:900}@media (width>=760px){.app-shell{padding:32px}.hero{grid-template-columns:1fr 280px;padding:36px}.stats-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.subjects-row,.mode-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.filter-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.dashboard-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.resources-panel,.version-panel{grid-column:1/-1}.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.version-stats{grid-template-columns:repeat(4,minmax(0,1fr))}.question-card,.flashcard{padding:32px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}