:root{--bg-base:#081e24;--bg-surface:#132f38;--bg-surface-elevated:#1d4552;--bg-glass-panel:#132f38cc;--text-primary:#f0f9ff;--text-secondary:#94a3b8;--color-primary:#0ea5e9;--color-primary-hover:#0284c7;--color-secondary:#2dd4bf;--color-success:#10b981;--color-danger:#f43f5e;--color-warning:#fbbf24;--font-base:"Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--space-xs:.25rem;--space-sm:.5rem;--space-md:1rem;--space-lg:1.5rem;--space-xl:2rem;--space-2xl:3rem;--radius-sm:.375rem;--radius-md:.75rem;--radius-lg:1rem;--radius-pill:9999px;--transition-fast:.15s ease-in-out;--transition-bouncy:.4s cubic-bezier(.175, .885, .32, 1.275)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px}@media (width<=480px){:root{--space-xs:.125rem;--space-sm:.25rem;--space-md:.5rem;--space-lg:.75rem;--space-xl:1rem;--space-2xl:1.5rem}html{font-size:14px}.container{padding:0}.main-container{min-height:100dvh;padding:0}.main-panel{min-height:100dvh;padding:var(--space-xl) var(--space-md);border:none;border-radius:0;flex-direction:column;justify-content:center;display:flex}}@media (width>=1200px){html{font-size:18px}}@media (width>=1600px){html{font-size:20px}}body{font-family:var(--font-base);background-color:var(--bg-base);color:var(--text-primary);-webkit-font-smoothing:antialiased;flex-direction:column;min-height:100vh;line-height:1.5;display:flex}.glass-panel{background:var(--bg-glass-panel);-webkit-backdrop-filter:blur(12px);border-radius:var(--radius-lg);border:1px solid #ffffff1a;box-shadow:0 8px 32px #0003}h1,h2,h3,h4{letter-spacing:-.02em;font-weight:800;line-height:1.2}h1{margin-bottom:var(--space-md);font-size:2.5rem}h2{margin-bottom:var(--space-sm);font-size:2rem}p{margin-bottom:var(--space-md);color:var(--text-secondary)}.container{width:100%;max-width:75rem;padding:0 var(--space-md);margin:0 auto}.flex-center{justify-content:center;align-items:center;display:flex}.btn{padding:var(--space-sm) var(--space-xl);font-family:var(--font-base);border-radius:var(--radius-pill);cursor:pointer;transition:all var(--transition-bouncy);border:none;justify-content:center;align-items:center;font-size:1.1rem;font-weight:600;text-decoration:none;display:inline-flex}.btn-primary{background-color:var(--color-primary);color:#fff;box-shadow:0 4px 14px #0ea5e963}.btn-primary:hover{background-color:var(--color-primary-hover);transform:translateY(-2px)scale(1.02);box-shadow:0 6px 20px #0ea5e980}.btn-primary:active{transform:translateY(1px)scale(.98)}.text-gradient{background:linear-gradient(135deg, var(--color-secondary), var(--color-primary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes bounceIn{0%{opacity:0;transform:scale(.3)}50%{opacity:1;transform:scale(1.05)}70%{transform:scale(.9)}to{transform:scale(1)}}.main-container{min-height:100dvh;padding:var(--space-xl) 0}.main-panel{padding:var(--space-xl);text-align:center;width:100%;max-width:45rem}.quiz-subtitle{opacity:.8;margin-bottom:var(--space-sm);display:block}.quiz-target-name{margin-bottom:0;font-size:2.5rem}.quiz-feedback-container{height:60px;margin-top:var(--space-md)}.quiz-feedback{border-radius:var(--radius-sm);color:#fff;padding:.8rem;font-weight:600;animation:.4s ease-out bounceIn}.quiz-warning{padding:var(--space-xl) 0;color:var(--color-warning)}.quiz-error-text{color:var(--color-danger)}.quiz-option{padding:var(--space-lg);background-color:var(--bg-surface);border:2px solid var(--bg-surface-elevated);border-radius:var(--radius-md);text-align:center;cursor:pointer;transition:all var(--transition-bouncy);font-size:1.25rem;font-weight:600}@media (hover:hover){.quiz-option:hover{border-color:var(--color-primary);transform:translateY(-4px);box-shadow:0 10px 25px -5px #0ea5e966}}.quiz-option:active{transform:scale(.95)}.quiz-option.correct-selection{z-index:10;transform:scale(1.05);border-color:var(--color-success)!important;background-color:#10b98126!important;box-shadow:0 0 25px #10b981b3!important}.quiz-option.wrong-selection{animation:.4s ease-in-out shake;border-color:var(--color-danger)!important;opacity:.6!important;background-color:#f43f5e1a!important;box-shadow:0 0 15px #f43f5e66!important}.quiz-option.dimmed{filter:grayscale(40%);transform:scale(.95);opacity:.4!important}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-6px)}75%{transform:translate(6px)}}.grid-2x2{gap:var(--space-md);grid-template-columns:1fr 1fr;display:grid}@media (width>=768px){.grid-2x2{grid-template-columns:repeat(4,1fr)}}@media (width<=480px){.grid-2x2{gap:var(--space-sm)}.quiz-option{padding:var(--space-md) var(--space-sm);font-size:1.15rem}}.grid-1-col{gap:var(--space-md);grid-template-columns:1fr;display:grid}.category-selector-container{margin-bottom:var(--space-lg)}.category-select{padding:var(--space-sm) var(--space-md);border-radius:var(--radius-sm);background:var(--bg-surface-elevated);color:var(--text-primary);border:1px solid var(--color-primary);cursor:pointer;font-family:var(--font-base);outline:none;font-size:1rem}.streak-score-container{margin:var(--space-sm) 0 var(--space-md) 0;text-align:center;padding:var(--space-md);border-radius:var(--radius-md);box-shadow:none;transition:all var(--transition-bouncy);background:#ffffff0d;border:2px solid #ffffff1a;transform:translateY(0)}.streak-score-container.feedback-correct{border-color:var(--color-primary);transform:translateY(-4px);box-shadow:0 10px 25px -5px #0ea5e966}.streak-score-container.feedback-wrong{border-color:var(--color-danger);transform:translateY(-4px);box-shadow:0 10px 25px -5px #f43f5e66}.streak-score-container.streak-new-record{border-color:var(--color-warning);background:#fbbf241a;transform:translateY(-6px)scale(1.03);box-shadow:0 12px 30px -5px #fbbf2480}.streak-score-title{margin:0;font-weight:800;display:inline-block}.streak-score-title.streak-new-record{color:var(--color-warning);font-size:1.4rem;animation:2s ease-in-out infinite pulseGlow}.streak-score-title.streak-wrong{color:var(--color-danger)}.streak-score-pb{margin-top:var(--space-xs);color:var(--text-secondary);opacity:.9;font-size:.8rem;font-weight:600}.streak-score-pb.streak-new-record{color:var(--color-warning)}@keyframes pulseGlow{0%{transform:scale(1)}50%{text-shadow:0 0 8px #fbbf2499;transform:scale(1.04)}to{transform:scale(1)}}.form-input{border-radius:var(--radius-sm);padding:var(--space-sm) var(--space-md);color:var(--text-primary);transition:all var(--transition-fast);text-align:center;background:#0003;border:1px solid #ffffff1a;outline:none;font-family:inherit;font-size:1rem}.form-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px #0ea5e933}.streak-score-btn{margin-top:var(--space-sm);border-radius:var(--radius-md);padding:var(--space-sm);text-align:center;transition:all var(--transition-bouncy);cursor:pointer;background:#ffffff0d;border:2px solid #ffffff1a;width:100%}.streak-score-btn:hover{border-color:var(--color-primary);transform:translateY(-4px);box-shadow:0 10px 25px -5px #0ea5e966}.payment-form-container{margin-top:var(--space-xl);padding:var(--space-lg);border-radius:var(--radius-lg);background:#ffffff0d;border:1px solid #ffffff1a}.payment-form-title{margin-bottom:var(--space-md);color:var(--text-primary);font-size:1.2rem;font-weight:800}.payment-form-notice{padding:var(--space-sm);margin-bottom:var(--space-md);border-left:4px solid var(--color-warning);color:var(--text-secondary);background:#ffc1071a;border-radius:4px;font-size:.9rem}.payment-form{gap:var(--space-md);flex-direction:column;display:flex}.payment-input-group{flex-direction:column;gap:4px;display:flex}.payment-input-group.flex-1{flex:1;min-width:120px}.payment-input-row{gap:var(--space-md);flex-wrap:wrap;display:flex}.payment-label{color:var(--text-secondary);font-size:.85rem}.payment-input{color:var(--text-primary);background:#0003;border:1px solid #fff3;border-radius:4px;padding:8px;font-family:inherit;font-size:1rem}.payment-input.card-number{letter-spacing:2px}.payment-error{color:var(--color-danger);font-size:.9rem}.payment-submit-btn{margin-top:var(--space-sm);background-color:var(--color-success);border-color:var(--color-success);width:100%;padding:12px;box-shadow:0 4px 14px #10b98163}.payment-submit-btn:hover{background-color:#059669;box-shadow:0 6px 20px #10b98180}.bottom-bar{bottom:var(--space-lg);right:var(--space-lg);justify-content:center;align-items:center;gap:var(--space-md);width:fit-content;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-pill);z-index:1000;animation:fadeIn var(--transition-bouncy);display:flex;position:fixed}.social-link{align-items:center;gap:var(--space-sm);color:var(--text-secondary);transition:all var(--transition-fast);font-weight:500;text-decoration:none;display:flex}.social-link:hover{color:var(--text-primary);transform:scale(1.1)}.social-icon{filter:invert();opacity:.8;width:24px;height:24px;transition:opacity var(--transition-fast)}.social-link:hover .social-icon{opacity:1}.dev-bar{background:var(--bg-surface-elevated);border-bottom:1px solid var(--color-warning);height:36px;color:var(--color-warning);z-index:9999;text-transform:uppercase;letter-spacing:.05em;pointer-events:none;opacity:.9;flex-direction:column;justify-content:center;align-items:center;gap:2px;font-size:.65rem;font-weight:800;display:flex;position:fixed;top:0;left:0;right:0}.dev-bar-prod{background:var(--color-danger);color:#fff;border-bottom:1px solid #ffffff4d}.dev-bar-badge{opacity:.8;font-size:.6rem}.settings-bar-container{top:var(--space-lg);right:var(--space-lg);z-index:1000;position:fixed}.settings-toggle-btn{background:var(--bg-glass-panel);-webkit-backdrop-filter:blur(12px);cursor:pointer;width:44px;height:44px;color:var(--text-primary);transition:all var(--transition-bouncy);border:1px solid #ffffff1a;border-radius:50%;justify-content:center;align-items:center;display:flex;box-shadow:0 4px 12px #0003}.settings-toggle-btn:hover{border-color:var(--color-primary);transform:scale(1.1);box-shadow:0 4px 16px #0ea5e966}.settings-dropdown{width:220px;padding:var(--space-sm);gap:var(--space-xs);animation:fadeIn var(--transition-fast);flex-direction:column;display:flex;position:absolute;top:54px;right:0}.settings-menu-link{padding:var(--space-sm) var(--space-md);color:var(--text-primary);border-radius:var(--radius-sm);transition:background var(--transition-fast);cursor:pointer;font-weight:500;text-decoration:none;display:block}.settings-menu-link:hover{background:#ffffff1a}.settings-divider{background:#ffffff1a;height:1px;margin:4px 0}