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var(--md-border);border-radius:var(--md-radius-lg);padding:18px;margin-bottom:14px}.exam-review-card.correct{border-left-color:var(--md-success)}.exam-review-card.incorrect{border-left-color:var(--md-error)}.exam-review-meta{display:flex;justify-content:space-between;font-size:.78rem;color:var(--md-on-surface-variant);margin-bottom:10px}.review-tag-correct{color:var(--md-success);display:flex;align-items:center;gap:4px}.review-tag-incorrect{color:var(--md-error)}.exam-review-question{color:var(--md-on-surface);font-weight:600;margin-bottom:12px;line-height:1.45}.exam-review-answers{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}.exam-review-option{display:flex;align-items:flex-start;gap:10px;padding:8px 12px;border-radius:var(--md-radius-sm);font-size:.88rem;color:var(--md-on-surface-variant);border:1px solid transparent}.exam-review-option.right{border-color:var(--md-success);color:var(--md-on-surface)}.exam-review-option.wrong{border-color:var(--md-error);color:var(--md-on-surface)}.review-marker{margin-left:auto;font-size:.72rem;white-space:nowrap;color:var(--md-on-surface-variant)}.exam-review-option.right .review-marker{color:var(--md-success)}.exam-review-option.wrong .review-marker{color:var(--md-error)}.exam-review-skipped{font-size:.82rem;color:var(--md-warning);padding:4px 12px}.exam-review-explanation{background:var(--md-surface);border-radius:var(--md-radius-md);padding:12px 14px;font-size:.86rem;line-height:1.5;color:var(--md-on-surface-variant)}@media (max-width: 600px){.exam-screen{padding:12px}.exam-domain-row{grid-template-columns:1fr;gap:4px}}.guest-banner{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;background:color-mix(in srgb,var(--md-primary) 14%,var(--md-surface));border:1px solid var(--md-primary);border-radius:var(--md-radius-md);padding:10px 16px;margin:0 auto 16px;max-width:900px}.guest-banner-text{color:var(--md-on-surface);font-size:.88rem}.guest-banner-cta{background:var(--md-primary);color:var(--md-on-primary);border:none;border-radius:var(--md-radius-sm);padding:7px 14px;font-size:.82rem;font-weight:600;cursor:pointer;white-space:nowrap;transition:filter var(--md-transition)}.guest-banner-cta:hover{filter:brightness(1.15)}.guest-upsell{max-width:520px;margin:40px auto;padding:36px 28px;text-align:center;background:var(--md-surface-elevated);border:1px solid var(--md-border);border-radius:var(--md-radius-xl);display:flex;flex-direction:column;align-items:center;gap:16px;animation:fadeIn .3s ease}.guest-upsell-lock{color:var(--md-primary)}.guest-upsell h2{margin:0;color:var(--md-on-surface);font-size:1.35rem}.guest-upsell-bullets{text-align:left;color:var(--md-on-surface-variant);font-size:.92rem;line-height:1.7;margin:0;padding-left:20px}.guest-upsell-note{color:var(--md-on-surface-variant);font-size:.82rem;margin:0}.guest-upsell-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}.guest-upsell-primary{background:var(--md-primary);color:var(--md-on-primary);border:none;border-radius:var(--md-radius-md);padding:12px 26px;font-size:.95rem;font-weight:600;cursor:pointer;transition:filter var(--md-transition)}.guest-upsell-primary:hover{filter:brightness(1.15)}.guest-upsell-secondary{background:var(--md-surface);color:var(--md-on-surface);border:1px solid var(--md-border);border-radius:var(--md-radius-md);padding:12px 22px;font-size:.9rem;cursor:pointer}.locked-for-guest{opacity:.55;cursor:pointer;position:relative}.guest-lock-overlay{display:flex;align-items:center;justify-content:center;gap:6px;color:var(--md-primary);font-size:.8rem;font-weight:600;margin-top:8px}.settings-page{max-width:720px;margin:0 auto;padding:24px 20px 80px;animation:settingsFadeIn .3s ease}@keyframes settingsFadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.settings-header{display:flex;align-items:center;gap:12px;margin-bottom:32px}.settings-back-btn{background:var(--md-surface-variant);border:1px solid var(--md-border);color:var(--md-on-surface-variant);width:36px;height:36px;border-radius:var(--md-radius-md);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--md-transition);flex-shrink:0}.settings-back-btn:hover{background:var(--md-surface-hover);color:var(--md-on-surface);border-color:var(--md-primary)}.settings-header h1{font-size:1.5rem;font-weight:700;color:var(--md-on-surface)}.settings-section{background:var(--md-surface-variant);border:1px solid var(--md-border);border-radius:var(--md-radius-lg);padding:24px;margin-bottom:20px}.settings-section h2{font-size:1.1rem;font-weight:600;color:var(--md-on-surface);margin-bottom:16px;display:flex;align-items:center;gap:8px}.settings-section h2 svg{color:var(--md-primary);flex-shrink:0}.account-info-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.account-info-item{padding:12px;background:var(--md-surface-elevated);border-radius:var(--md-radius-md)}.account-info-item .info-label{font-size:.75rem;color:var(--md-on-surface-disabled);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}.account-info-item .info-value{font-size:.95rem;color:var(--md-on-surface);word-break:break-all}.account-info-item .info-value.verified{color:var(--md-success)}.account-info-item .info-value.unverified{color:var(--md-warning)}.account-info-editable{grid-column:1 / -1}.info-value-editable{cursor:pointer;display:flex;align-items:center;gap:8px;transition:color var(--md-transition)}.info-value-editable:hover{color:var(--md-primary)}.info-value-editable .edit-hint{font-size:.7rem;color:var(--md-on-surface-disabled);opacity:0;transition:opacity var(--md-transition)}.info-value-editable:hover .edit-hint{opacity:1}.inline-edit-row{display:flex;align-items:center;gap:6px}.inline-edit-input{flex:1;padding:6px 10px!important;font-size:.9rem!important}.inline-edit-save{background:var(--md-primary);color:#fff;border:none;width:30px;height:30px;border-radius:var(--md-radius-sm);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background var(--md-transition);flex-shrink:0}.inline-edit-save:hover{background:#4080b0}.inline-edit-save:disabled{opacity:.5;cursor:not-allowed}.inline-edit-cancel{background:none;border:1px solid var(--md-border);color:var(--md-on-surface-disabled);width:30px;height:30px;border-radius:var(--md-radius-sm);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.1rem;transition:all var(--md-transition);flex-shrink:0}.inline-edit-cancel:hover{color:#f85149;border-color:#f85149}.avatar-section-content{display:flex;flex-direction:column;align-items:center;gap:20px}.avatar-preview-area{display:flex;flex-direction:column;align-items:center;gap:8px}.avatar-preview{width:80px;height:80px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2rem;font-weight:700;color:#fff;border:3px solid var(--md-border);overflow:hidden;position:relative}.avatar-preview img{width:100%;height:100%;object-fit:cover}.avatar-preview canvas{width:100%;height:100%}.avatar-preview-label{font-size:.8rem;color:var(--md-on-surface-disabled)}.avatar-tabs{display:flex;gap:4px;background:var(--md-surface-elevated);border-radius:var(--md-radius-md);padding:4px;width:100%}.avatar-tab{flex:1;padding:8px 4px;background:transparent;border:none;color:var(--md-on-surface-variant);font-size:.8rem;font-weight:500;cursor:pointer;border-radius:var(--md-radius-sm);transition:all var(--md-transition);text-align:center}.avatar-tab:hover{color:var(--md-on-surface);background:var(--md-surface-hover)}.avatar-tab.active{background:var(--md-primary);color:#fff}.avatar-tab-content{width:100%}.emoji-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:8px}.emoji-option{width:100%;aspect-ratio:1;background:var(--md-surface-elevated);border:2px solid transparent;border-radius:var(--md-radius-md);font-size:1.5rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--md-transition)}.emoji-option:hover{background:var(--md-surface-hover);border-color:var(--md-primary);transform:scale(1.1)}.emoji-option.selected{border-color:var(--md-primary);background:#569cd61a}.color-swatches{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}.color-swatch{width:40px;height:40px;border-radius:50%;border:3px solid transparent;cursor:pointer;transition:all var(--md-transition)}.color-swatch:hover{transform:scale(1.15);box-shadow:0 0 12px #fff3}.color-swatch.selected{border-color:#fff;box-shadow:0 0 0 2px var(--md-primary)}.pattern-area{display:flex;flex-direction:column;align-items:center;gap:12px}.regenerate-btn{background:var(--md-surface-elevated);border:1px solid var(--md-border);color:var(--md-on-surface-variant);padding:8px 16px;border-radius:var(--md-radius-md);font-size:.85rem;cursor:pointer;transition:all var(--md-transition)}.regenerate-btn:hover{background:var(--md-surface-hover);color:var(--md-on-surface);border-color:var(--md-primary)}.upload-area{display:flex;flex-direction:column;align-items:center;gap:12px;width:100%}.upload-dropzone{width:100%;padding:24px;border:2px dashed var(--md-border);border-radius:var(--md-radius-md);text-align:center;cursor:pointer;transition:all var(--md-transition);color:var(--md-on-surface-variant)}.upload-dropzone:hover{border-color:var(--md-primary);background:#569cd61a}.upload-dropzone svg{margin-bottom:8px}.upload-dropzone p{font-size:.85rem}.upload-dropzone .upload-hint{font-size:.75rem;color:var(--md-on-surface-disabled);margin-top:4px}.save-avatar-btn{background:var(--md-primary);color:#fff;border:none;padding:10px 24px;border-radius:var(--md-radius-md);font-size:.9rem;font-weight:600;cursor:pointer;transition:all var(--md-transition)}.save-avatar-btn:hover{background:#4080b0;transform:translateY(-1px)}.save-avatar-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.password-form{display:flex;flex-direction:column;gap:12px}.settings-input-group{display:flex;flex-direction:column;gap:4px}.settings-input-group label{font-size:.8rem;color:var(--md-on-surface-variant);font-weight:500}.settings-input{background:var(--md-surface-elevated);border:1px solid var(--md-border);color:var(--md-on-surface);padding:10px 12px;border-radius:var(--md-radius-md);font-size:.9rem;font-family:inherit;transition:border-color var(--md-transition)}.settings-input:focus{outline:none;border-color:var(--md-primary);box-shadow:0 0 0 2px #569cd61a}.settings-input::placeholder{color:var(--md-on-surface-disabled)}.password-submit-btn{align-self:flex-start;background:var(--md-primary);color:#fff;border:none;padding:10px 20px;border-radius:var(--md-radius-md);font-size:.9rem;font-weight:600;cursor:pointer;transition:all var(--md-transition);margin-top:4px}.password-submit-btn:hover{background:#4080b0}.password-submit-btn:disabled{opacity:.5;cursor:not-allowed}.analytics-toggle-row{display:flex;align-items:center;justify-content:space-between;gap:16px}.analytics-toggle-info{flex:1}.analytics-toggle-info p{font-size:.9rem;color:var(--md-on-surface);margin-bottom:4px}.analytics-toggle-info .toggle-description{font-size:.8rem;color:var(--md-on-surface-disabled)}.toggle-switch{position:relative;width:48px;height:26px;flex-shrink:0}.toggle-switch input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:var(--md-surface-active);transition:var(--md-transition);border-radius:26px}.toggle-slider:before{position:absolute;content:"";height:20px;width:20px;left:3px;bottom:3px;background-color:var(--md-on-surface-variant);transition:var(--md-transition);border-radius:50%}.toggle-switch input:checked+.toggle-slider{background-color:var(--md-primary)}.toggle-switch input:checked+.toggle-slider:before{transform:translate(22px);background-color:#fff}.settings-section.danger-zone{border-color:#f8514966;background:linear-gradient(135deg,var(--md-surface-variant),rgba(248,81,73,.05))}.settings-section.danger-zone h2{color:#f85149}.settings-section.danger-zone h2 svg{color:#f85149}.danger-warning{font-size:.85rem;color:var(--md-on-surface-variant);margin-bottom:16px;line-height:1.5}.danger-warning strong{color:#f85149}.delete-confirm-area{display:flex;flex-direction:column;gap:12px}.delete-type-confirm{display:flex;flex-direction:column;gap:4px}.delete-type-confirm label{font-size:.8rem;color:var(--md-on-surface-variant)}.delete-type-confirm label code{color:#f85149;font-weight:600}.delete-btn{align-self:flex-start;background:#f85149;color:#fff;border:none;padding:10px 20px;border-radius:var(--md-radius-md);font-size:.9rem;font-weight:600;cursor:pointer;transition:all var(--md-transition)}.delete-btn:hover{background:#da3633}.delete-btn:disabled{opacity:.4;cursor:not-allowed;background:#f85149}.settings-success{background:#3fb9501a;border:1px solid rgba(63,185,80,.3);color:var(--md-success);padding:10px 14px;border-radius:var(--md-radius-md);font-size:.85rem;font-weight:500}.settings-error{background:#f851491a;border:1px solid rgba(248,81,73,.3);color:#f85149;padding:10px 14px;border-radius:var(--md-radius-md);font-size:.85rem;font-weight:500}@media (max-width: 768px){.settings-page{padding:16px 16px 60px}.settings-section{padding:20px 16px}.account-info-grid{grid-template-columns:1fr}.emoji-grid{grid-template-columns:repeat(8,1fr);gap:6px}.emoji-option{font-size:1.2rem}.avatar-tabs{flex-wrap:wrap}.avatar-tab{flex:1 1 45%}}@media (max-width: 480px){.settings-header h1{font-size:1.25rem}.emoji-grid{grid-template-columns:repeat(4,1fr);gap:8px}.emoji-option{font-size:1.4rem}.color-swatches{gap:8px}.color-swatch{width:34px;height:34px}.analytics-toggle-row{flex-direction:column;align-items:flex-start}}:root{--md-surface: #1e1e1e;--md-surface-variant: #252526;--md-surface-elevated: #2d2d2d;--md-surface-hover: #3c3c3c;--md-surface-active: #505050;--md-primary: #569cd6;--md-primary-variant: #4fc1ff;--md-secondary: #4ec9b0;--md-accent: #c586c0;--md-warning: #dcdcaa;--md-error: #f14c4c;--md-success: #89d185;--md-on-surface: #cccccc;--md-on-surface-variant: #9d9d9d;--md-on-surface-disabled: #6e6e6e;--md-on-primary: #ffffff;--md-border: #3c3c3c;--md-border-variant: #4d4d4d;--md-shadow-1: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.24);--md-shadow-2: 0 3px 6px rgba(0,0,0,.16), 0 3px 6px rgba(0,0,0,.23);--md-shadow-3: 0 10px 20px rgba(0,0,0,.19), 0 6px 6px rgba(0,0,0,.23);--md-shadow-4: 0 14px 28px rgba(0,0,0,.25), 0 10px 10px rgba(0,0,0,.22);--md-radius-sm: 4px;--md-radius-md: 8px;--md-radius-lg: 12px;--md-radius-xl: 16px;--md-transition: .2s cubic-bezier(.4, 0, .2, 1)}@property --border-angle{syntax: "<angle>"; initial-value: 0deg; inherits: false;}@keyframes borderRotate{to{--border-angle: 360deg}}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--md-surface);color:var(--md-on-surface);min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh}.game-container{min-height:100vh;padding:24px;position:relative;overflow-x:hidden;background:var(--md-surface)}.game-container:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse at top,rgba(86,156,214,.03) 0%,transparent 50%);pointer-events:none;z-index:0}button{font-family:Inter,sans-serif;cursor:pointer;transition:all var(--md-transition)}.back-button{background:var(--md-surface-variant);border:1px solid var(--md-border);color:var(--md-on-surface);padding:8px 16px;border-radius:var(--md-radius-md);font-size:14px;font-weight:500;margin-bottom:24px;display:inline-flex;align-items:center;gap:6px}.back-button:hover{background:var(--md-surface-hover);border-color:var(--md-border-variant)}.section-title{font-size:28px;font-weight:600;margin-bottom:8px;text-align:center;color:var(--md-on-surface);letter-spacing:-.5px}.section-subtitle{color:var(--md-on-surface-variant);margin-bottom:32px;text-align:center;font-size:14px}.tab-navigation{display:flex;justify-content:center;gap:4px;margin-bottom:32px;padding:4px;background:var(--md-surface-variant);border-radius:var(--md-radius-lg);max-width:360px;margin-left:auto;margin-right:auto;position:relative;z-index:10;box-shadow:var(--md-shadow-1)}.tab-btn{display:flex;align-items:center;gap:8px;padding:10px 20px;background:transparent;border:none;border-radius:var(--md-radius-md);font-size:14px;font-weight:500;color:var(--md-on-surface-variant);flex:1;justify-content:center}.tab-btn:hover{color:var(--md-on-surface);background:var(--md-surface-hover)}.tab-btn.active{background:var(--md-primary);color:var(--md-on-primary);box-shadow:var(--md-shadow-1)}.tab-icon{font-size:16px}.tab-label{font-weight:500}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--md-surface)}::-webkit-scrollbar-thumb{background:var(--md-surface-active);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--md-on-surface-disabled)}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;gap:16px;color:var(--md-on-surface-variant)}.user-header{display:flex;justify-content:flex-end;padding:8px 0;margin-bottom:8px}.login-prompt{display:flex;justify-content:center;margin-bottom:16px}.login-prompt-btn{background:transparent;border:1px dashed var(--md-border);border-radius:var(--md-radius-md);color:var(--md-primary);font-size:13px;padding:8px 16px;cursor:pointer;transition:all .2s ease}.login-prompt-btn:hover{background:var(--md-surface-variant);border-style:solid}.auth-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px;overflow-y:auto}.auth-modal-overlay>div{max-height:90vh;overflow-y:auto}.user-header{display:flex;justify-content:space-between;align-items:center;padding:8px 0;margin-bottom:16px}.back-to-hub-link{color:var(--md-on-surface-variant);text-decoration:none;font-size:14px;transition:color .2s ease}@media (max-width: 480px){.tab-navigation{max-width:100%}.tab-btn{padding:10px 12px;font-size:13px}.game-container{padding:16px}}.menu-screen{max-width:480px;margin:0 auto;padding:20px;position:relative;z-index:1}.menu-header{text-align:center;margin-bottom:32px}.game-title{font-size:28px;font-weight:700;color:var(--md-on-surface);display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:8px}.title-icon{font-size:32px}.game-subtitle{color:var(--md-on-surface-variant);font-size:14px}.stats-overview{background:var(--md-surface-variant);border:1px solid var(--md-border);border-radius:var(--md-radius-lg);padding:24px;margin-bottom:24px;box-shadow:var(--md-shadow-1);transition:border-color .3s ease,box-shadow .3s ease}.stats-overview:hover{border-color:var(--md-border-variant);box-shadow:var(--md-shadow-2)}.level-display{text-align:center;margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid var(--md-border)}.level-label{font-size:12px;text-transform:uppercase;letter-spacing:1px;color:var(--md-on-surface-variant);display:block;margin-bottom:4px}.level-value{font-size:48px;font-weight:700;color:var(--md-primary);display:block;line-height:1;margin-bottom:12px}.xp-bar{height:8px;background:var(--md-surface);border-radius:4px;overflow:hidden;margin-bottom:8px}.xp-fill{height:100%;background:linear-gradient(90deg,var(--md-primary),var(--md-secondary));border-radius:4px;transition:width .3s ease}.xp-text{font-size:12px;color:var(--md-on-surface-variant);font-family:JetBrains Mono,monospace}.quick-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.stat-item{text-align:center;display:flex;flex-direction:column;align-items:center;gap:4px}.stat-item svg{color:var(--md-primary);margin-bottom:4px}.stat-value{font-size:20px;font-weight:600;color:var(--md-on-surface);font-family:JetBrains 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