.estudos-app{--paper:#fbf8f1;--paper-line:#dde3ee;--ink:#16233f;--ink-soft:#3c4a68;--red:#d7263d;--gold:#f4b93e;--gold-soft:#fce9bd;--white:#fff;--green:#2e9e5b;--green-soft:#dff3e7;--red-soft:#fbe1e4;--radius:16px;--shadow:0 12px 30px #16233f24;background:var(--paper);min-height:100vh;color:var(--ink);background-image:linear-gradient(var(--paper-line) 1px, transparent 1px), linear-gradient(90deg, var(--paper-line) 1px, transparent 1px);background-size:28px 28px;flex-direction:column;align-items:center;padding:32px 16px 60px;font-family:Inter,sans-serif;display:flex}.estudos-app *,.estudos-app :before,.estudos-app :after{box-sizing:border-box}.estudos-app h1,.estudos-app h2,.estudos-app h3{color:var(--ink);margin:0;font-family:"Baloo 2",sans-serif}.estudos-app .mono{letter-spacing:.04em;text-transform:uppercase;font-family:JetBrains Mono,monospace}.estudos-app .hidden{display:none!important}.estudos-app .brand-bar{justify-content:center;align-items:center;width:100%;max-width:680px;margin-bottom:10px;display:flex}.estudos-app .brand-logo{width:auto;height:48px;display:block}.estudos-app .topbar{text-align:center;width:100%;max-width:680px;margin-bottom:12px}.estudos-app .topbar h1{font-size:1.9rem;line-height:1.15}.estudos-app .topbar p{color:var(--ink-soft);margin-top:6px;font-size:.95rem}.estudos-app .back-row{width:100%;max-width:680px;margin-bottom:14px}.estudos-app .back-btn{color:var(--ink-soft);cursor:pointer;background:0 0;border:none;align-items:center;gap:6px;padding:8px 0;font-family:Inter;font-size:.85rem;font-weight:700;display:inline-flex}.estudos-app .back-btn:hover{color:var(--ink)}.estudos-app #home{width:100%;max-width:680px}.estudos-app .panel-grid{grid-template-columns:1fr 1fr;gap:20px;display:grid}.estudos-app .panel-card{background:var(--white);border:2px solid var(--ink);text-align:left;cursor:pointer;box-shadow:0 10px 0 var(--ink);border-radius:20px;flex-direction:column;gap:14px;padding:30px 24px;transition:transform .12s;display:flex}.estudos-app .panel-card:hover{box-shadow:0 7px 0 var(--ink);transform:translateY(3px)}.estudos-app .panel-card .icon{border-radius:14px;justify-content:center;align-items:center;width:52px;height:52px;font-size:1.6rem;display:flex}.estudos-app .panel-card.flash .icon{background:var(--gold-soft)}.estudos-app .panel-card.quiz .icon{background:var(--red-soft)}.estudos-app .panel-card h3{font-size:1.25rem}.estudos-app .panel-card p{color:var(--ink-soft);margin:0;font-size:.88rem;line-height:1.45}.estudos-app .panel-card .cta{color:var(--red);align-items:center;gap:6px;margin-top:auto;font-family:JetBrains Mono;font-size:.7rem;font-weight:700;display:flex}.estudos-app .panel-card .stat{color:var(--ink-soft);font-size:.72rem;font-weight:600}@media (width<=560px){.estudos-app .panel-grid{grid-template-columns:1fr}}.estudos-app .progress-row{width:100%;max-width:640px;color:var(--ink-soft);justify-content:space-between;align-items:center;margin-bottom:18px;font-size:.78rem;display:flex}.estudos-app .progress-bar{background:var(--paper-line);border-radius:99px;flex:1;height:6px;margin:0 12px;overflow:hidden}.estudos-app .progress-fill{background:var(--red);width:0%;height:100%;transition:width .25s}.estudos-app .score-pill{background:var(--gold-soft);color:#7a5200;border-radius:999px;padding:5px 12px;font-family:JetBrains Mono;font-size:.72rem;font-weight:700}.estudos-app .controls{flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;width:100%;max-width:640px;margin-bottom:18px;display:flex}.estudos-app select{color:var(--ink);background:var(--white);border:1px solid var(--paper-line);cursor:pointer;border-radius:10px;padding:10px 14px;font-family:Inter;font-size:.88rem;font-weight:600}.estudos-app .btn-ghost{color:var(--ink);background:var(--white);border:1px solid var(--paper-line);cursor:pointer;border-radius:10px;align-items:center;gap:6px;padding:10px 16px;font-family:Inter;font-size:.85rem;font-weight:700;display:flex}.estudos-app .btn-ghost:hover{border-color:var(--ink)}.estudos-app .scene{perspective:1400px;width:100%;max-width:640px;height:340px;margin-bottom:22px}.estudos-app .fcard{width:100%;height:100%;transform-style:preserve-3d;cursor:pointer;transition:transform .5s cubic-bezier(.4,.2,.2,1);position:relative}.estudos-app .fcard.flipped{transform:rotateY(180deg)}.estudos-app .face{backface-visibility:hidden;box-shadow:var(--shadow);border:1px solid var(--paper-line);border-radius:20px;flex-direction:column;padding:34px 32px;display:flex;position:absolute;inset:0}.estudos-app .face.front{background:var(--white)}.estudos-app .face.back{background:var(--ink);color:var(--white);transform:rotateY(180deg)}.estudos-app .face .cat{border-radius:999px;align-self:flex-start;margin-bottom:18px;padding:5px 12px;font-size:.66rem;font-weight:700}.estudos-app .face.front .cat{background:var(--gold-soft);color:#7a5200}.estudos-app .face.back .cat{color:var(--gold);background:#ffffff1f}.estudos-app .face .qa-label{opacity:.55;margin-bottom:8px;font-size:.68rem;font-weight:700}.estudos-app .face .content{flex:1;align-items:center;font-family:"Baloo 2";font-size:1.4rem;font-weight:600;line-height:1.3;display:flex}.estudos-app .face.back .content{font-family:Inter;font-size:1.15rem;font-weight:500}.estudos-app .hint{color:var(--ink-soft);align-self:center;margin-top:auto;padding-top:10px;font-size:.75rem}.estudos-app .face.back .hint{color:#b9c2d8}.estudos-app .nav-row{flex-wrap:wrap;justify-content:center;align-items:center;gap:14px;width:100%;max-width:640px;margin-bottom:8px;display:flex}.estudos-app .nav-btn{border:2px solid var(--ink);background:var(--white);cursor:pointer;width:52px;height:52px;color:var(--ink);box-shadow:0 6px 0 var(--ink);border-radius:50%;justify-content:center;align-items:center;font-size:1.3rem;font-weight:800;transition:transform .1s;display:flex}.estudos-app .nav-btn:hover{box-shadow:0 4px 0 var(--ink);transform:translateY(2px)}.estudos-app .nav-btn:disabled{opacity:.35;cursor:not-allowed;box-shadow:none}.estudos-app .rate-row{gap:10px;display:flex}.estudos-app .rate-wrap{justify-content:center;width:100%;max-width:640px;margin-top:14px;display:flex}.estudos-app .rate-btn{cursor:pointer;color:var(--white);border:none;border-radius:12px;padding:14px 22px;font-family:Inter;font-size:.9rem;font-weight:800}.estudos-app .rate-btn.easy{background:var(--green);box-shadow:0 6px #1f7a44}.estudos-app .rate-btn.hard{background:var(--red);box-shadow:0 6px #9d1728}.estudos-app .rate-btn:hover{transform:translateY(2px)}.estudos-app .rate-btn.easy:hover{box-shadow:0 4px #1f7a44}.estudos-app .rate-btn.hard:hover{box-shadow:0 4px #9d1728}.estudos-app .quiz-tabs{background:var(--white);border:1px solid var(--paper-line);border-radius:12px;gap:8px;width:100%;max-width:640px;margin-bottom:18px;padding:5px;display:flex}.estudos-app .quiz-tab{text-align:center;color:var(--ink-soft);cursor:pointer;background:0 0;border:none;border-radius:9px;flex:1;padding:10px 12px;font-family:Inter;font-size:.85rem;font-weight:700}.estudos-app .quiz-tab.active{background:var(--ink);color:var(--white)}.estudos-app .qlist{flex-direction:column;gap:10px;width:100%;max-width:640px;display:flex}.estudos-app .qlist-item{text-align:left;background:var(--white);border:1px solid var(--paper-line);cursor:pointer;border-radius:12px;align-items:flex-start;gap:14px;padding:16px 18px;transition:border-color .12s;display:flex}.estudos-app .qlist-item:hover{border-color:var(--ink)}.estudos-app .qlist-item .qlist-num{color:var(--red);flex-shrink:0;width:26px;font-family:JetBrains Mono;font-size:.78rem;font-weight:700}.estudos-app .qlist-item .qlist-text{color:var(--ink);font-size:.92rem;line-height:1.45}.estudos-app .qlist-item .qlist-badge{border-radius:999px;flex-shrink:0;align-self:center;margin-left:auto;padding:3px 9px;font-family:JetBrains Mono;font-size:.65rem;font-weight:700}.estudos-app .qlist-item .qlist-badge.correct{background:var(--green-soft);color:var(--green)}.estudos-app .qlist-item .qlist-badge.wrong{background:var(--red-soft);color:var(--red)}.estudos-app .qlist-item .qlist-badge.pending{background:var(--paper-line);color:var(--ink-soft)}.estudos-app .quiz-card{background:var(--white);border:1px solid var(--paper-line);width:100%;max-width:640px;box-shadow:var(--shadow);border-radius:20px;padding:32px 30px}.estudos-app .qnum{color:var(--red);margin-bottom:8px;font-size:.7rem;font-weight:700}.estudos-app .qtext{margin-bottom:22px;font-family:"Baloo 2";font-size:1.28rem;font-weight:600;line-height:1.35}.estudos-app .options{flex-direction:column;gap:10px;display:flex}.estudos-app .opt{text-align:left;border:1.5px solid var(--paper-line);background:var(--paper);cursor:pointer;color:var(--ink);border-radius:12px;align-items:center;gap:12px;padding:14px 16px;font-family:Inter;font-size:.95rem;font-weight:500;transition:all .12s;display:flex}.estudos-app .opt:hover:not(.locked){border-color:var(--ink);background:var(--white)}.estudos-app .opt .letter{background:var(--white);border:1.5px solid var(--paper-line);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-family:JetBrains Mono;font-size:.8rem;font-weight:700;display:flex}.estudos-app .opt.correct{background:var(--green-soft);border-color:var(--green)}.estudos-app .opt.correct .letter{background:var(--green);border-color:var(--green);color:var(--white)}.estudos-app .opt.wrong{background:var(--red-soft);border-color:var(--red)}.estudos-app .opt.wrong .letter{background:var(--red);border-color:var(--red);color:var(--white)}.estudos-app .opt.dim{opacity:.5}.estudos-app .opt.locked{cursor:default}.estudos-app .explanation{background:var(--ink);color:#fff;border-radius:12px;margin-top:22px;padding:18px 20px;display:none}.estudos-app .explanation.show{display:block}.estudos-app .explanation .tag{color:var(--gold);margin-bottom:8px;font-size:.68rem;font-weight:700}.estudos-app .explanation p{color:#dce2ee;margin:0;font-size:.9rem;line-height:1.5}.estudos-app .actions{justify-content:space-between;align-items:center;gap:12px;margin-top:22px;display:flex}.estudos-app .btn-primary{background:var(--red);color:var(--white);cursor:pointer;border:none;border-radius:12px;padding:13px 24px;font-family:Inter;font-size:.9rem;font-weight:800;text-decoration:none;display:inline-block;box-shadow:0 6px #9d1728}.estudos-app .btn-primary:hover{transform:translateY(2px);box-shadow:0 4px #9d1728}.estudos-app .summary{background:var(--white);border:2px solid var(--ink);width:100%;max-width:640px;box-shadow:0 12px 0 var(--ink);text-align:center;border-radius:20px;padding:40px 34px}.estudos-app .summary .big-score{margin:4px 0;font-family:"Baloo 2";font-size:3.4rem;font-weight:800}.estudos-app .summary .big-score span{color:var(--ink-soft);font-size:1.6rem}.estudos-app .summary h2{margin-bottom:6px;font-size:1.5rem}.estudos-app .summary p.msg{color:var(--ink-soft);margin-bottom:24px}.estudos-app .summary-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.estudos-app .btn-outline{background:var(--white);color:var(--ink);border:2px solid var(--ink);cursor:pointer;border-radius:12px;padding:12px 22px;font-family:Inter;font-size:.9rem;font-weight:800}.estudos-app footer{color:var(--ink-soft);text-align:center;margin-top:32px;font-size:.78rem}@media (width<=480px){.estudos-app .scene{height:380px}.estudos-app .face{padding:26px 22px}.estudos-app .face .content{font-size:1.2rem}.estudos-app .quiz-card{padding:24px 20px}.estudos-app .qtext{font-size:1.1rem}}