*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--yellow:#f5c200;--yellow-hover:#e0b000;--bg:#f6f5f1;--bg-card:#fff;--text:#2a2824;--text2:#7a7670;--border:#00000014;--border2:#00000024;--radius:10px;--radius-lg:10px;--radius-xl:10px;--correct-bg:#e8f5d8;--correct:#3a6e12;--correct-border:#5a9e22;--wrong-bg:#fce8e0;--wrong:#9e3a1a;--wrong-border:#d0602a}@media (prefers-color-scheme:dark){:root{--bg:#1e1d1a;--bg-card:#272521;--text:#f0ede4;--text2:#8a8780;--border:#ffffff14;--border2:#ffffff26;--correct-bg:#1a2e0a;--correct:#7dc43a;--correct-border:#4a8a18;--wrong-bg:#2e1208;--wrong:#e07858;--wrong-border:#a34028}}body{background:var(--bg);color:var(--text);min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;line-height:1.6}.app{max-width:680px;min-height:calc(100vh - 200px);margin:0 auto;padding:0 1rem 4rem}.header-wrapper{justify-content:center;padding:1.25rem 1rem 2rem;display:flex}.header-card{background:#2a2824;border-radius:10px;align-items:center;gap:.75rem;width:90vw;max-width:1200px;padding:.85rem 1.25rem;display:flex}.logo{color:#fff;white-space:nowrap;flex-shrink:0;font-size:17px;font-weight:700}.logo-dot{color:var(--yellow)}.nav-links{flex:1;gap:2px;padding:0 .75rem;display:flex}.site-nav{flex:1;gap:4px;padding:0 .75rem;display:flex}.site-nav-link{color:#ffffffb8;border-radius:8px;padding:8px 12px;font-size:13px;font-weight:500;text-decoration:none;transition:all .15s}.site-nav-link:hover{color:#fff;background:#ffffff1a}.app-tabs-wrapper{justify-content:center;padding:0 1rem 1.5rem;display:flex}.app-tabs{background:var(--bg-card);border:1.5px solid var(--border);border-radius:10px;gap:6px;padding:5px;display:flex}a.logo{color:#fff;text-decoration:none}.app-tab{color:var(--text2);cursor:pointer;background:0 0;border:none;border-radius:7px;padding:7px 18px;font-size:13px;font-weight:500;transition:all .15s}.app-tab:hover{color:var(--text)}.app-tab.active{background:var(--yellow);color:#2a2824;font-weight:700}.nav-link{text-align:center;color:#ffffffb8;cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:8px;flex:1;padding:8px 10px;font-size:13px;font-weight:500;transition:all .15s}.nav-link:hover{color:#fff;background:#ffffff1a}.nav-link.active{background:var(--yellow);color:#2a2824;font-weight:700}.lang-dropdown{flex-shrink:0;position:relative}.lang-trigger{color:#fffc;cursor:pointer;white-space:nowrap;background:#ffffff1f;border:1px solid #ffffff40;border-radius:8px;align-items:center;gap:5px;padding:7px 14px;font-size:12px;font-weight:600;transition:all .15s;display:flex}.lang-trigger:hover{background:#ffffff1f}.lang-code{letter-spacing:.04em}.lang-chevron{opacity:.6;font-size:9px}.lang-menu{border-radius:var(--radius);z-index:100;background:#2a2824;border:1px solid #ffffff1f;min-width:150px;padding:4px;position:absolute;top:calc(100% + 8px);right:0;box-shadow:0 8px 24px #0000004d}.lang-option{color:#fff9;cursor:pointer;text-align:left;background:0 0;border:none;border-radius:6px;align-items:center;gap:8px;width:100%;padding:8px 10px;font-size:13px;font-weight:500;transition:all .12s;display:flex}.lang-option:hover{color:#fff;background:#ffffff14}.lang-option.selected{color:var(--yellow)}.lang-option-flag{font-size:16px}.lang-option-label{flex:1}.lang-check{color:var(--yellow);font-size:12px}.search-hero{margin-bottom:1.5rem;transition:margin .2s}.search-hero--compact{margin-bottom:1rem}.hero-title{letter-spacing:-.8px;color:var(--text);margin-bottom:6px;font-size:32px;font-weight:700;line-height:1.2}.hero-sub{color:var(--text2);font-size:15px}.search-wrap{margin-bottom:1rem;position:relative}.search-icon{color:var(--text2);pointer-events:none;font-size:17px;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.search-input{border:1.5px solid var(--border2);border-radius:var(--radius-lg);background:var(--bg-card);width:100%;color:var(--text);outline:none;padding:13px 42px;font-size:16px;transition:border-color .15s,box-shadow .15s}.search-input:focus{border-color:var(--yellow);box-shadow:0 0 0 3px #f5c20024}.search-input::placeholder{color:var(--text2)}.clear-btn{color:var(--text2);cursor:pointer;background:0 0;border:none;font-size:15px;line-height:1;position:absolute;top:50%;right:14px;transform:translateY(-50%)}.no-result{text-align:center;color:var(--text2);padding:2.5rem 1rem;font-size:14px}.result-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius-lg);margin-bottom:1rem;padding:1.25rem}.article-badge{letter-spacing:.05em;border-radius:20px;margin-bottom:10px;padding:3px 10px;font-size:12px;font-weight:700;display:inline-block}.badge-der{color:#1a5a9e;background:#ddeaf8}.badge-die{color:#9e3a1a;background:#fce4dc}.badge-das{color:#3a6e12;background:#e2f2d4}.word-main{letter-spacing:-.8px;color:var(--text);margin-bottom:4px;font-size:34px;font-weight:700;line-height:1.1}.word-sub{color:var(--text2);margin-bottom:1rem;font-size:14px}.decl-divider{background:var(--border);height:1px;margin-bottom:1rem}.decl-label{letter-spacing:.08em;text-transform:uppercase;color:var(--text2);margin-bottom:8px;font-size:10px;font-weight:700}.decl-grid{grid-template-columns:1fr 1fr;gap:8px;display:grid}.decl-cell{background:var(--bg);border-radius:8px;padding:8px 10px}.decl-case{letter-spacing:.05em;text-transform:uppercase;color:var(--text2);margin-bottom:2px;font-size:10px;font-weight:600}.decl-form{color:var(--text);margin-bottom:4px;font-size:14px;font-weight:600}.decl-example{color:var(--text2);border-top:1px solid var(--border);margin-top:2px;padding-top:4px;font-size:12px;font-style:italic;line-height:1.4}.quiz-meta{align-items:center;gap:10px;margin-bottom:1.25rem;display:flex}.progress-bar{background:var(--border2);border-radius:3px;flex:1;height:5px;overflow:hidden}.progress-fill{background:var(--yellow);border-radius:3px;height:100%;transition:width .35s}.quiz-count{color:var(--text2);text-align:right;min-width:42px;font-size:13px;font-weight:600}.quiz-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius-lg);text-align:center;margin-bottom:1.1rem;padding:2.5rem 1.5rem}.quiz-word{letter-spacing:-1.5px;color:var(--text);margin-bottom:8px;font-size:44px;font-weight:700;line-height:1}.quiz-trans{color:var(--text2);font-size:14px}.article-btns{gap:10px;margin-bottom:1rem;display:flex}.art-btn{border:1.5px solid var(--border2);border-radius:var(--radius);background:var(--bg-card);color:var(--text);cursor:pointer;flex:1;padding:15px;font-size:20px;font-weight:700;transition:all .15s}.art-btn:hover:not(:disabled){border-color:var(--yellow);background:#f5c2000f}.art-btn:disabled{opacity:.4;cursor:default}.art-btn.correct{background:var(--correct-bg);border-color:var(--correct-border);color:var(--correct);opacity:1!important}.art-btn.wrong{background:var(--wrong-bg);border-color:var(--wrong-border);color:var(--wrong);opacity:1!important}.art-btn.dimmed{opacity:.3}.feedback{text-align:center;border-radius:var(--radius);margin-bottom:1rem;padding:10px 14px;font-size:14px;font-weight:600}.feedback-ok{background:var(--correct-bg);color:var(--correct)}.feedback-err{background:var(--wrong-bg);color:var(--wrong)}.explanation-card{background:var(--bg-card);border:1.5px solid var(--border);border-left:3px solid var(--yellow);border-radius:var(--radius);margin-bottom:1rem;padding:12px 14px;font-size:13px;line-height:1.55}.explanation-rule{color:var(--text);margin-bottom:4px}.explanation-exceptions{color:var(--text2)}.explanation-label{color:var(--text);font-weight:700}.next-btn{border-radius:var(--radius);background:var(--yellow);color:#2a2824;cursor:pointer;border:none;width:100%;padding:14px;font-size:15px;font-weight:700;transition:background .15s}.next-btn:hover{background:var(--yellow-hover)}.quiz-done{text-align:center;padding:3rem 1rem 2rem}.quiz-done-icon{margin-bottom:1rem;font-size:52px}.quiz-done-title{letter-spacing:-.5px;margin-bottom:8px;font-size:26px;font-weight:700}.quiz-done-sub{color:var(--text2);margin-bottom:2rem;font-size:16px}.category-section{margin-top:2rem}.category-label{letter-spacing:.08em;text-transform:uppercase;color:var(--text2);margin-bottom:12px;font-size:11px;font-weight:700}.category-scroll{-webkit-overflow-scrolling:touch;scrollbar-width:thin;scrollbar-color:var(--border2) transparent;gap:10px;padding-bottom:8px;display:flex;overflow:auto hidden}.category-scroll::-webkit-scrollbar{height:6px}.category-scroll::-webkit-scrollbar-track{background:0 0}.category-scroll::-webkit-scrollbar-thumb{background:var(--border2);border-radius:3px}.category-grid{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.category-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius);aspect-ratio:1;cursor:pointer;text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:20px 10px;transition:all .15s;display:flex}.category-card:hover{border-color:var(--border2);background:var(--bg)}.category-card.active{border-color:var(--yellow);background:#f5c2000f}.category-emoji{margin-bottom:6px;font-size:28px}.category-name{color:var(--text);margin-bottom:2px;font-size:13px;font-weight:600}.category-count{color:var(--text2);font-size:11px}.register-cta{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius-lg);text-align:center;margin-bottom:1rem;padding:1.75rem}.cta-icon{margin-bottom:12px;font-size:40px}.cta-title{letter-spacing:-.3px;margin-bottom:8px;font-size:20px;font-weight:700}.cta-sub{color:var(--text2);max-width:340px;margin-bottom:1.25rem;margin-left:auto;margin-right:auto;font-size:14px;line-height:1.65}.cta-btn{background:var(--yellow);color:#2a2824;border-radius:var(--radius);cursor:pointer;border:none;margin-bottom:12px;padding:12px 32px;font-size:15px;font-weight:700;transition:background .15s;display:inline-block}.cta-btn:hover{background:var(--yellow-hover)}.cta-login{color:var(--text2);cursor:pointer;font-size:13px;display:block}.cta-login span{color:#b89000;font-weight:600}.stats-preview{opacity:.3;filter:blur(4px);pointer-events:none;-webkit-user-select:none;user-select:none;grid-template-columns:1fr 1fr;gap:10px;display:grid}.stat-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius);padding:1rem}.stat-label{color:var(--text2);margin-bottom:4px;font-size:12px}.stat-value{letter-spacing:-.5px;color:var(--text);font-size:28px;font-weight:700}@media (max-width:520px){.header-wrapper{padding:.75rem .75rem 1.5rem}.header-card{flex-wrap:wrap;gap:8px;width:100%;max-width:100%;padding:.75rem 1rem}.logo{flex:1;font-size:16px}.nav-links{order:3;gap:4px;width:100%;padding:0}.nav-link{padding:8px 4px;font-size:12px}.lang-dropdown{order:2}.hero-title{font-size:22px}.hero-sub{font-size:13px}.quiz-word{font-size:32px}.word-main{font-size:24px}.decl-grid{grid-template-columns:1fr}.article-btns{gap:8px}.art-btn{padding:13px;font-size:18px}.category-grid{gap:8px}.category-card{padding:14px 8px}}.quiz-category-header{align-items:center;gap:10px;margin-bottom:10px;display:flex}.quiz-exit-btn{background:var(--bg-card);border:1.5px solid var(--border2);border-radius:var(--radius);color:var(--text2);cursor:pointer;width:36px;height:36px;font-size:16px;transition:all .15s}.quiz-exit-btn:hover{color:var(--text);border-color:var(--text2)}.quiz-category-info{flex-direction:column;display:flex}.quiz-category-name{color:var(--text);font-size:14px;font-weight:700}.quiz-category-total{color:var(--text2);font-size:11px}.progress-segments{flex:1;align-items:center;gap:3px;display:flex}.progress-seg{background:var(--border2);border-radius:3px;flex:1;min-width:0;height:6px;transition:background .2s}.seg-correct{background:var(--yellow)}.seg-wrong{background:var(--wrong-border)}.seg-current{background:var(--border2);outline:2px solid var(--yellow);outline-offset:1px}.quiz-done-segments{flex-wrap:wrap;justify-content:center;gap:3px;max-width:360px;margin:1rem auto 1.5rem;display:flex}.quiz-done-segments .progress-seg{border-radius:4px;flex:none;width:18px;height:8px}.quiz-done-actions{flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:12px;display:flex}.quiz-done-actions .next-btn{flex:1;min-width:140px;max-width:220px}.repeat-btn{border:1.5px solid var(--wrong-border);border-radius:var(--radius);background:var(--wrong-bg);min-width:140px;max-width:220px;color:var(--wrong);cursor:pointer;flex:1;padding:14px;font-size:14px;font-weight:700;transition:opacity .15s}.repeat-btn:hover{opacity:.85}.quiz-back-link{color:var(--text2);cursor:pointer;background:0 0;border:none;padding:4px;font-size:13px}.quiz-back-link:hover{color:var(--text)}@media (max-width:520px){.progress-seg{height:5px}.quiz-done-segments .progress-seg{width:14px;height:6px}}.quiz-category-header--all{align-items:center;gap:8px;margin-bottom:10px;display:flex}.quiz-mode-selector{gap:6px;margin-bottom:1.25rem;display:flex}.quiz-mode-btn{border:1.5px solid var(--border2);border-radius:var(--radius);background:var(--bg-card);color:var(--text2);cursor:pointer;flex:1;padding:8px 10px;font-size:13px;font-weight:600;transition:all .15s}.quiz-mode-btn:hover{color:var(--text);border-color:var(--text2)}.quiz-mode-btn.active{background:var(--yellow);border-color:var(--yellow);color:#2a2824}.quiz-case-badge{letter-spacing:.07em;text-transform:uppercase;background:var(--bg);border:1.5px solid var(--border2);color:var(--text2);border-radius:20px;margin-top:10px;padding:3px 12px;font-size:11px;font-weight:700;display:inline-block}.decl-btns{grid-template-columns:1fr 1fr;gap:10px;margin-bottom:1rem;display:grid}.decl-btn{border:1.5px solid var(--border2);border-radius:var(--radius);background:var(--bg-card);color:var(--text);cursor:pointer;text-align:center;padding:14px 10px;font-size:15px;font-weight:600;transition:all .15s}.decl-btn:hover:not(:disabled){border-color:var(--yellow);background:#f5c2000f}.decl-btn:disabled{cursor:default}.decl-btn.correct{background:var(--correct-bg);border-color:var(--correct-border);color:var(--correct);opacity:1!important}.decl-btn.wrong{background:var(--wrong-bg);border-color:var(--wrong-border);color:var(--wrong);opacity:1!important}.decl-btn.dimmed{opacity:.3}@media (max-width:520px){.decl-btn{padding:12px 8px;font-size:13px}.quiz-mode-btn{padding:7px 6px;font-size:12px}}.quiz-card--decl{padding:1.75rem 1.5rem}.quiz-word--sm{color:var(--text2);letter-spacing:-.3px;margin-bottom:14px;font-size:22px;font-weight:700}.quiz-sentence{color:var(--text);letter-spacing:-.3px;font-size:22px;font-weight:600;line-height:1.5}@media (max-width:520px){.quiz-word--sm,.quiz-sentence{font-size:18px}}.header-right{flex-shrink:0;align-items:center;gap:8px;display:flex}.auth-login-btn{background:var(--yellow);color:#2a2824;cursor:pointer;white-space:nowrap;border:1px solid #ffffff40;border-radius:8px;padding:7px 14px;font-size:13px;font-weight:600;transition:all .15s}.auth-login-btn:hover{background:var(--yellow-hover)}.user-menu{position:relative}.user-trigger{cursor:pointer;background:0 0;border:none;align-items:center;padding:0;display:flex}.user-avatar{border:2px solid var(--yellow);object-fit:cover;border-radius:50%;width:32px;height:32px}.user-avatar-fallback{background:var(--yellow);color:#2a2824;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:14px;font-weight:700;display:flex}.user-dropdown{border-radius:var(--radius);z-index:100;background:#2a2824;border:1px solid #ffffff1f;min-width:180px;padding:8px;position:absolute;top:calc(100% + 8px);right:0;box-shadow:0 8px 24px #0000004d}.user-dropdown-name{color:#fff;padding:4px 8px 2px;font-size:14px;font-weight:600}.user-dropdown-email{color:#ffffff73;word-break:break-all;padding:0 8px 6px;font-size:12px}.user-dropdown-divider{border:none;border-top:1px solid #ffffff1a;margin:4px 0}.user-dropdown-signout{color:#fff9;cursor:pointer;text-align:left;background:0 0;border:none;border-radius:6px;width:100%;padding:8px 10px;font-size:13px;font-weight:500;transition:all .12s}.user-dropdown-signout:hover{color:#fff;background:#ffffff14}.auth-overlay{z-index:1000;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#0000008c;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.auth-modal{background:var(--bg-card);border:1.5px solid var(--border2);border-radius:var(--radius-lg);width:100%;max-width:380px;padding:2rem 1.75rem;position:relative}.auth-close{color:var(--text2);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:4px;font-size:16px;line-height:1;transition:all .12s;position:absolute;top:14px;right:14px}.auth-close:hover{color:var(--text);background:var(--border)}.auth-title{letter-spacing:-.4px;color:var(--text);margin-bottom:1.25rem;font-size:22px;font-weight:700}.auth-google-btn{border:1.5px solid var(--border2);border-radius:var(--radius);background:var(--bg-card);width:100%;color:var(--text);cursor:pointer;justify-content:center;align-items:center;gap:10px;margin-bottom:1rem;padding:11px 16px;font-size:14px;font-weight:600;transition:all .15s;display:flex}.auth-google-btn:hover{background:var(--bg);border-color:var(--text2)}.auth-divider{color:var(--text2);align-items:center;gap:10px;margin-bottom:1rem;font-size:12px;display:flex}.auth-divider:before,.auth-divider:after{content:"";background:var(--border2);flex:1;height:1px}.auth-input{border:1.5px solid var(--border2);border-radius:var(--radius);background:var(--bg);width:100%;color:var(--text);outline:none;margin-bottom:10px;padding:11px 14px;font-size:14px;transition:border-color .15s,box-shadow .15s;display:block}.auth-input:focus{border-color:var(--yellow);box-shadow:0 0 0 3px #f5c20024}.auth-input::placeholder{color:var(--text2)}.auth-error{color:var(--wrong);background:var(--wrong-bg);border-radius:6px;margin-bottom:10px;padding:8px 12px;font-size:13px}.auth-success{color:var(--correct);background:var(--correct-bg);border-radius:6px;margin-bottom:10px;padding:8px 12px;font-size:13px}.auth-submit-btn{border-radius:var(--radius);background:var(--yellow);color:#2a2824;cursor:pointer;border:none;width:100%;margin-bottom:1rem;padding:12px;font-size:15px;font-weight:700;transition:background .15s}.auth-submit-btn:hover:not(:disabled){background:var(--yellow-hover)}.auth-submit-btn:disabled{opacity:.6;cursor:default}.auth-switch{color:var(--text2);text-align:center;font-size:13px}.auth-switch button{color:#b89000;cursor:pointer;background:0 0;border:none;padding:0;font-size:13px;font-weight:600}.auth-switch button:hover{text-decoration:underline}@media (max-width:520px){.auth-login-btn{padding:6px 10px;font-size:12px}.header-right{gap:6px}}