@import"https://fonts.googleapis.com/css2?family=Sora:wght@400;600;700;800&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap";:root{--bg-0: #0B0F14;--bg-1: #101720;--bg-2: #151E2A;--bg-3: #1B2736;--tx-1: #E8EEF6;--tx-2: #A6B4C6;--tx-3: #6C7A8F;--line: rgba(148,163,184,.13);--line-strong: rgba(148,163,184,.24);--mint: #2EE6A8;--mint-deep: #14B984;--mint-ink: #062D20;--amber: #FFC757;--rose: #FF8093;--sky: #5CC8FF;--violet: #B18CFF;--cat-security: var(--rose);--cat-logic: var(--violet);--cat-performance: var(--sky);--cat-style: var(--amber);--font-display: "Sora", ui-sans-serif, system-ui, sans-serif;--font-body: "Inter", ui-sans-serif, system-ui, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;--bg-primary: var(--bg-0);--bg-secondary: var(--bg-1);--bg-card: var(--bg-1);--text-primary: var(--tx-1);--text-secondary: var(--tx-2);--text-muted: var(--tx-3);--primary-color: var(--mint);--primary-hover: var(--mint-deep);--secondary-color: var(--tx-2);--secondary-hover: var(--tx-1);--border-color: var(--line);--shadow-color: rgba(1, 4, 9, .4);--header-bg: var(--bg-1);--header-text: var(--tx-1);--success-color: var(--mint);--warning-color: var(--amber);--error-color: var(--rose)}[data-theme=dark]{color-scheme:dark}:focus-visible{outline:2px solid var(--mint);outline-offset:2px}body{margin:0;font-family:var(--font-body);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-primary);color:var(--text-primary)}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}.app-layout{min-height:100vh;display:flex;flex-direction:column}.app-header{background-color:var(--header-bg);color:var(--header-text);padding:1rem 0;box-shadow:0 2px 4px var(--shadow-color)}.header-content{max-width:1200px;margin:0 auto;padding:0 1rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.logo h1{margin:0;font-size:1.8rem;color:#3498db}.logo p{margin:0;font-size:.9rem;opacity:.8}.main-navigation ul{list-style:none;margin:0;padding:0;display:flex;gap:2rem}.main-navigation a{color:#fff;text-decoration:none;padding:.5rem 1rem;border-radius:4px;transition:background-color .2s}.main-navigation a:hover{background-color:#ffffff1a}.language-toggle{display:flex;align-items:center;gap:.5rem}.language-label{font-size:.9rem;font-weight:500;color:#ffffffe6;margin:0}.language-selector{padding:.5rem .75rem;border:1px solid rgba(255,255,255,.2);border-radius:6px;background-color:#ffffff1a;color:#fff;font-size:.9rem;cursor:pointer;transition:all .2s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.language-selector:hover{background-color:#fff3;border-color:#fff6}.language-selector:focus{outline:none;background-color:#fff3;border-color:#3498db;box-shadow:0 0 0 2px #3498db4d}.language-selector option{background-color:#2c3e50;color:#fff;padding:.5rem}.app-main{flex:1;max-width:1200px;margin:0 auto;padding:2rem 1rem;width:100%;box-sizing:border-box}.app-footer{background-color:var(--header-bg);color:var(--header-text);text-align:center;padding:1rem;margin-top:auto}.btn{display:inline-block;padding:.75rem 1.5rem;border:none;border-radius:4px;text-decoration:none;font-weight:500;cursor:pointer;transition:all .2s;margin:.25rem}.btn-primary{background-color:#3498db;color:#fff}.btn-primary:hover{background-color:#2980b9}.btn-secondary{background-color:#95a5a6;color:#fff}.btn-secondary:hover{background-color:#7f8c8d}.home-page{text-align:center}.hero-section{margin-bottom:3rem}.hero-section h2{font-size:2rem;margin-bottom:1.5rem;color:#2c3e50}.cta-buttons{margin-top:2rem}.features-section h3{font-size:1.5rem;margin-bottom:2rem;color:#2c3e50}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;margin-top:2rem}.feature-card{background:var(--bg-card);padding:2rem;border-radius:6px;border:1px solid var(--border-color);box-shadow:none}.feature-card h4{color:var(--primary-color);margin-bottom:1rem}.language-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin-top:2rem}.language-card{background:var(--bg-card);padding:1.5rem;border-radius:6px;border:1px solid var(--border-color);box-shadow:none;cursor:pointer;transition:transform .2s}.language-card:hover{transform:translateY(-2px)}.language-card h4{color:#3498db;margin-bottom:.5rem}.programming-language-selector{margin:2rem 0}.programming-language-selector h3{color:#2c3e50;margin-bottom:1.5rem;font-size:1.3rem}.language-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1rem;margin-bottom:2rem}.language-option{background:var(--bg-card);border:1px solid var(--border-color);border-radius:6px;padding:1.5rem;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:1rem;position:relative}.language-option:hover{border-color:var(--primary-color);transform:none;box-shadow:none}.language-option.selected{border-color:var(--primary-color);background-color:#58a6ff1a;box-shadow:none}.language-option:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #58a6ff4d}.language-icon{width:50px;height:50px;border-radius:50%;background:linear-gradient(135deg,#3498db,#2980b9);display:flex;align-items:center;justify-content:center;flex-shrink:0}.language-symbol{color:#fff;font-weight:700;font-size:1.2rem}.language-info{flex:1}.language-info h4{margin:0 0 .5rem;color:#2c3e50;font-size:1.1rem}.language-info p{margin:0;color:#7f8c8d;font-size:.9rem}.selection-indicator{width:24px;height:24px;display:flex;align-items:center;justify-content:center}.checkmark{color:#27ae60;font-weight:700;font-size:1.2rem}.language-dropdown{display:none;align-items:center;gap:.5rem;margin-top:1rem}.language-dropdown label{font-weight:500;color:#2c3e50}.language-select{padding:.5rem;border:1px solid #ddd;border-radius:4px;background-color:#fff;font-size:1rem;min-width:150px}.language-select:focus{outline:none;border-color:#3498db;box-shadow:0 0 0 2px #3498db33}.challenges-language-selector{background:#fff;padding:2rem;border-radius:8px;box-shadow:0 2px 8px #0000001a;margin-bottom:2rem}.challenges-list h3{color:#2c3e50;margin-bottom:1rem}.challenge-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem;margin-top:1.5rem}.challenge-card{background:var(--bg-card);padding:1.5rem;border-radius:6px;border:1px solid var(--border-color);box-shadow:none;transition:border-color .2s,background-color .2s}.challenge-card:hover{border-color:var(--primary-color);box-shadow:none}.challenge-card h4{color:var(--text-primary);margin:0 0 1rem;font-size:1.2rem}.challenge-meta{display:flex;gap:.5rem;margin-bottom:1rem;flex-wrap:wrap}.difficulty-badge,.language-badge{padding:.25rem .75rem;border-radius:12px;font-size:.8rem;font-weight:500;text-transform:uppercase}.difficulty-badge.difficulty-junior{background-color:#d5f4e6;color:#27ae60}.difficulty-badge.difficulty-mid{background-color:#fef9e7;color:#f39c12}.difficulty-badge.difficulty-senior{background-color:#fadbd8;color:#e74c3c}.language-badge{background-color:#ebf3fd;color:#3498db}.challenge-card p{color:#7f8c8d;margin-bottom:1.5rem;line-height:1.5}.challenge-card .btn{width:100%;margin:0}.api-status-notice,.error-message{margin:1rem 0;padding:1rem;border-radius:4px}.api-status-notice{background-color:#fef9e7;border-left:4px solid #f39c12}.error-message{background-color:#fadbd8;border-left:4px solid #e74c3c}@media (max-width: 768px){.language-options{grid-template-columns:1fr}.language-option{padding:1rem}.language-dropdown{display:flex;flex-direction:column;align-items:stretch;gap:.5rem}.language-select{min-width:auto}}.profile-placeholder{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;margin-top:2rem}.profile-stats,.profile-badges,.profile-challenges{background:#fff;padding:2rem;border-radius:8px;box-shadow:0 2px 8px #0000001a}.leaderboard-header{display:grid;grid-template-columns:1fr 2fr 1fr 1fr;gap:1rem;padding:1rem;background:#fff;border-radius:8px 8px 0 0;font-weight:700;color:#2c3e50}.leaderboard-empty{background:#fff;padding:2rem;border-radius:0 0 8px 8px;text-align:center;color:#7f8c8d}@media (max-width: 768px){.header-content{flex-direction:column;text-align:center}.main-navigation ul{flex-wrap:wrap;justify-content:center}.features-grid,.language-grid{grid-template-columns:1fr}.leaderboard-header{grid-template-columns:1fr;text-align:center}}.pr-dojo{max-width:1200px;margin:0 auto;padding:1rem}.pr-dojo-header{margin-bottom:2rem}.pr-dojo-header h2{color:#2c3e50;margin-bottom:.5rem}.challenge-info h3{color:#34495e;margin-bottom:.5rem}.file-info{display:flex;align-items:center;gap:1rem}.filename{font-family:Monaco,Menlo,Ubuntu Mono,monospace;background:#f8f9fa;padding:.25rem .5rem;border-radius:4px;font-size:.9rem}.code-review-container{position:relative;border:1px solid #e1e8ed;border-radius:8px;overflow:hidden;margin-bottom:2rem}.code-display{position:relative}.code-header{background:#f6f8fa;padding:.75rem 1rem;border-bottom:1px solid #e1e8ed;font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:.9rem;color:#586069}.code-content{display:flex;background:#1e1e1e;min-height:400px}.line-numbers{background:#252526;padding:1rem .5rem;border-right:1px solid #3e3e42;-webkit-user-select:none;user-select:none;min-width:60px}.line-number{display:block;padding:0 .5rem;line-height:1.5;font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:14px;color:#858585;cursor:pointer;transition:all .2s ease;border-radius:3px;margin:0 2px}.line-number:hover{background:#2d2d30;color:#ccc}.line-number.active{background:#0e639c;color:#fff}.line-number.has-comment{background:#f39c12;color:#fff;font-weight:700}.line-number.has-comment:hover{background:#e67e22}.code-lines{flex:1;overflow-x:auto}.comment-indicators{position:absolute;right:1rem;top:0;pointer-events:none}.comment-indicator{position:absolute;right:0;pointer-events:auto}.comment-bubble{background:#fff;border:1px solid #e1e8ed;border-radius:8px;padding:.75rem;box-shadow:0 2px 8px #0000001a;max-width:300px;position:relative}.comment-bubble:before{content:"";position:absolute;left:-8px;top:50%;transform:translateY(-50%);width:0;height:0;border-top:8px solid transparent;border-bottom:8px solid transparent;border-right:8px solid white}.comment-category{font-size:.8rem;font-weight:600;color:#f39c12;margin-bottom:.25rem;text-transform:uppercase}.comment-text{font-size:.9rem;color:#2c3e50;line-height:1.4}.delete-comment{position:absolute;top:.25rem;right:.25rem;background:none;border:none;color:#95a5a6;cursor:pointer;font-size:1.2rem;line-height:1;padding:.25rem;border-radius:3px}.delete-comment:hover{background:#ecf0f1;color:#e74c3c}.comment-interface{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:#fff;border:1px solid #e1e8ed;border-radius:8px;box-shadow:0 4px 20px #00000026;z-index:1000;width:90%;max-width:500px;max-height:80vh;overflow-y:auto}.comment-interface-header{display:flex;justify-content:space-between;align-items:center;padding:1rem;border-bottom:1px solid #e1e8ed;background:#f6f8fa}.comment-interface-header h4{margin:0;color:#2c3e50}.close-button{background:none;border:none;font-size:1.5rem;color:#95a5a6;cursor:pointer;padding:.25rem;border-radius:3px}.close-button:hover{background:#ecf0f1;color:#e74c3c}.comment-form{padding:1rem}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:600;color:#2c3e50}.category-select{width:100%;padding:.75rem;border:1px solid #ddd;border-radius:4px;font-size:1rem;background:#fff}.category-select:focus{outline:none;border-color:#3498db;box-shadow:0 0 0 2px #3498db33}.category-description{margin-top:.5rem;font-size:.9rem;color:#7f8c8d;font-style:italic}.comment-textarea{width:100%;padding:.75rem;border:1px solid #ddd;border-radius:4px;font-size:1rem;font-family:inherit;resize:vertical;min-height:100px}.comment-textarea:focus{outline:none;border-color:#3498db;box-shadow:0 0 0 2px #3498db33}.textarea-help{display:flex;justify-content:space-between;margin-top:.5rem;font-size:.8rem;color:#7f8c8d}.form-actions{display:flex;gap:1rem;justify-content:flex-end;margin-top:1.5rem}.review-summary{display:flex;justify-content:space-between;align-items:center;padding:1rem;background:#f8f9fa;border-radius:8px;border:1px solid #e9ecef}.comments-count{font-weight:600;color:#2c3e50}.submit-review{padding:.75rem 2rem;font-size:1.1rem;font-weight:600}@media (max-width: 768px){.pr-dojo{padding:.5rem}.code-content{flex-direction:column}.line-numbers{display:none}.comment-interface{width:95%;margin:1rem}.file-info{flex-direction:column;align-items:flex-start;gap:.5rem}.review-summary{flex-direction:column;gap:1rem;text-align:center}}@media (prefers-color-scheme: dark){.comment-interface{background:#2c3e50;border-color:#34495e;color:#ecf0f1}.comment-interface-header{background:#34495e;border-color:#4a5f7a}.comment-interface-header h4{color:#ecf0f1}.category-select,.comment-textarea,.comment-bubble{background:#34495e;border-color:#4a5f7a;color:#ecf0f1}.comment-bubble:before{border-right-color:#34495e}}.feedback-visualization{max-width:1200px;margin:0 auto;padding:1rem}.feedback-header{margin-bottom:2rem}.feedback-header h2{color:#2c3e50;margin-bottom:.5rem}.scorecard{background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;margin-bottom:2rem;overflow:hidden}.scorecard-header{background:linear-gradient(135deg,#3498db,#2980b9);color:#fff;padding:1rem}.scorecard-header h3{margin:0;font-size:1.3rem}.scorecard-content{padding:1.5rem}.score-summary{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:2rem}.score-item{display:flex;flex-direction:column;align-items:center;padding:1rem;border-radius:8px;background:#f8f9fa;border:2px solid #e9ecef}.score-item.primary{background:linear-gradient(135deg,#27ae60,#229954);color:#fff;border-color:#27ae60}.score-label{font-size:.9rem;font-weight:500;margin-bottom:.5rem;text-align:center}.score-value{font-size:2rem;font-weight:700}.score-breakdown h4{color:#2c3e50;margin-bottom:1rem;font-size:1.1rem}.breakdown-items{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:.75rem}.breakdown-item{display:flex;justify-content:space-between;align-items:center;padding:.75rem;background:#f8f9fa;border-radius:6px;border-left:4px solid #3498db}.breakdown-label{font-size:.9rem;color:#2c3e50}.breakdown-value{font-weight:700;color:#3498db}.level-up-notification{margin-top:1.5rem;padding:1rem;background:linear-gradient(135deg,#f39c12,#e67e22);color:#fff;border-radius:8px;text-align:center}.level-up-text{font-weight:700;font-size:1.1rem}.earned-badges{margin-top:1.5rem}.earned-badges h4{color:#2c3e50;margin-bottom:1rem}.badge-list{display:flex;flex-wrap:wrap;gap:.5rem}.earned-badge{padding:.5rem 1rem;background:linear-gradient(135deg,#9b59b6,#8e44ad);color:#fff;border-radius:20px;font-size:.9rem;font-weight:500}.feedback-code-container{background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;margin-bottom:2rem;overflow:hidden}.feedback-code-header{display:flex;justify-content:space-between;align-items:center;padding:1rem;background:#f6f8fa;border-bottom:1px solid #e1e8ed}.feedback-code-header h3{margin:0;color:#2c3e50}.legend{display:flex;gap:1.5rem}.legend-item{display:flex;align-items:center;gap:.5rem;font-size:.9rem;color:#586069}.legend-color{width:16px;height:16px;border-radius:3px}.legend-color.correct{background:#28a745}.legend-color.missed{background:#dc3545}.code-display-feedback{position:relative}.code-content-feedback{display:flex;background:#1e1e1e;min-height:400px;position:relative}.line-numbers-feedback{background:#252526;padding:1rem .5rem;border-right:1px solid #3e3e42;-webkit-user-select:none;user-select:none;min-width:60px;position:relative;z-index:2}.feedback-line-number{display:block;padding:0 .5rem;line-height:1.5;font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:14px;color:#858585;border-radius:3px;margin:0 2px;position:relative}.feedback-line-number.highlight-correct{background:#28a745;color:#fff;font-weight:700}.feedback-line-number.highlight-missed{background:#dc3545;color:#fff;font-weight:700}.code-lines-feedback{flex:1;overflow-x:auto;position:relative;z-index:1}.line-overlays{position:absolute;top:0;left:0;right:0;bottom:0;pointer-events:none;z-index:1}.line-overlay{position:absolute;left:0;right:0;opacity:.2}.line-overlay.correct{background:#28a745}.line-overlay.missed{background:#dc3545}.issue-explanations{background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;padding:1.5rem}.issue-explanations h3{color:#2c3e50;margin-bottom:1.5rem;font-size:1.3rem}.explanation-section{margin-bottom:2rem}.explanation-section:last-child{margin-bottom:0}.explanation-section-title{font-size:1.1rem;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid}.explanation-section-title.correct{color:#28a745;border-color:#28a745}.explanation-section-title.missed{color:#dc3545;border-color:#dc3545}.explanation-list{display:flex;flex-direction:column;gap:1rem}.explanation-item{border-radius:8px;padding:1rem;border-left:4px solid}.explanation-item.correct{background:#f8fff9;border-color:#28a745}.explanation-item.missed{background:#fff8f8;border-color:#dc3545}.explanation-header{display:flex;align-items:center;gap:.75rem;margin-bottom:.75rem;flex-wrap:wrap}.line-reference{font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-weight:700;color:#2c3e50;background:#f8f9fa;padding:.25rem .5rem;border-radius:4px;font-size:.9rem}.status-badge{padding:.25rem .75rem;border-radius:12px;font-size:.8rem;font-weight:500;text-transform:uppercase}.status-badge.correct{background:#28a745;color:#fff}.status-badge.missed{background:#dc3545;color:#fff}.category-badge{padding:.25rem .75rem;border-radius:12px;font-size:.8rem;font-weight:500;text-transform:uppercase;color:#fff}.explanation-content{color:#2c3e50;line-height:1.5}.issue-explanation{margin-bottom:.75rem}.issue-keywords{display:flex;align-items:center;gap:.5rem;font-size:.9rem}.keywords-label{font-weight:500;color:#7f8c8d}.keywords-list{font-family:Monaco,Menlo,Ubuntu Mono,monospace;background:#f8f9fa;padding:.25rem .5rem;border-radius:4px;color:#2c3e50}.overall-feedback{margin-top:2rem;padding-top:1.5rem;border-top:2px solid #e9ecef}.overall-feedback h4{color:#2c3e50;margin-bottom:1rem}.feedback-content{background:#f8f9fa;padding:1rem;border-radius:6px;border-left:4px solid #3498db;color:#2c3e50;line-height:1.6}@media (max-width: 768px){.feedback-visualization{padding:.5rem}.feedback-code-header{flex-direction:column;gap:1rem;align-items:flex-start}.legend{flex-direction:column;gap:.5rem}.score-summary,.breakdown-items{grid-template-columns:1fr}.explanation-header{flex-direction:column;align-items:flex-start;gap:.5rem}.code-content-feedback{flex-direction:column}.line-numbers-feedback{display:none}}@media (prefers-color-scheme: dark){.scorecard,.feedback-code-container,.issue-explanations{background:#2c3e50;color:#ecf0f1}.feedback-code-header{background:#34495e;border-color:#4a5f7a}.explanation-item.correct{background:#1e3a2e}.explanation-item.missed{background:#3a1e1e}.line-reference,.keywords-list,.feedback-content{background:#34495e;color:#ecf0f1}}.feedback-page{min-height:100vh;background:#f5f5f5}.error-container{text-align:center;padding:2rem;background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;margin:2rem auto;max-width:500px}.error-container h2{color:#e74c3c;margin-bottom:1rem}.error-container p{color:#7f8c8d;margin-bottom:.5rem}.feedback-actions{display:flex;justify-content:center;gap:1rem;margin:2rem 0;padding:0 1rem}@media (max-width: 768px){.feedback-actions{flex-direction:column;align-items:center}.feedback-actions .btn{width:100%;max-width:300px}}.profile-page{max-width:1200px;margin:0 auto;padding:1rem}.profile-page h2{color:#2c3e50;margin-bottom:2rem;font-size:2rem}.profile-content{display:grid;grid-template-columns:2fr 1fr;gap:2rem}.profile-main,.profile-sidebar{display:flex;flex-direction:column;gap:2rem}.loading-container,.error-container{text-align:center;padding:2rem;background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a}.loading{color:#3498db;font-size:1.1rem}.error{color:#e74c3c;margin-bottom:1rem}.user-profile-card{background:#fff;border-radius:12px;box-shadow:0 4px 16px #0000001a;padding:2rem;border:1px solid #e9ecef}.profile-header{display:flex;align-items:center;gap:1.5rem;margin-bottom:2rem}.profile-avatar{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,#3498db,#2980b9);display:flex;align-items:center;justify-content:center;flex-shrink:0}.avatar-initial{color:#fff;font-size:2rem;font-weight:700}.profile-info{flex:1}.username{margin:0 0 .5rem;color:#2c3e50;font-size:1.8rem}.level-info{display:flex;align-items:center;gap:.5rem}.level{background:linear-gradient(135deg,#f39c12,#e67e22);color:#fff;padding:.25rem .75rem;border-radius:20px;font-size:.9rem;font-weight:600}.xp-section{margin-bottom:2rem}.xp-display{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem}.xp-total{font-size:1.2rem;font-weight:600;color:#2c3e50}.xp-next-level{font-size:.9rem;color:#7f8c8d}.xp-progress-bar{width:100%;height:12px;background:#ecf0f1;border-radius:6px;overflow:hidden}.xp-progress-fill{height:100%;background:linear-gradient(135deg,#27ae60,#229954);border-radius:6px;transition:width .3s ease}.badges-section h3{color:#2c3e50;margin-bottom:1rem;font-size:1.3rem}.badges-grid{display:grid;gap:1rem}.badge-item{display:flex;align-items:center;gap:1rem;padding:1rem;background:#f8f9fa;border-radius:8px;border-left:4px solid #9b59b6}.badge-icon{font-size:2rem;width:50px;height:50px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#9b59b6,#8e44ad);border-radius:50%;flex-shrink:0}.badge-info{flex:1}.badge-name{display:block;font-weight:600;color:#2c3e50;margin-bottom:.25rem}.badge-description{display:block;font-size:.9rem;color:#7f8c8d}.no-badges{color:#7f8c8d;font-style:italic;text-align:center;padding:2rem;background:#f8f9fa;border-radius:8px}.challenge-history{background:#fff;border-radius:12px;box-shadow:0 4px 16px #0000001a;padding:1.5rem;border:1px solid #e9ecef}.challenge-history h3{color:#2c3e50;margin-bottom:1.5rem;font-size:1.3rem}.challenges-list{display:flex;flex-direction:column;gap:1rem;max-height:400px;overflow-y:auto}.challenge-item{display:flex;justify-content:space-between;align-items:center;padding:1rem;background:#f8f9fa;border-radius:8px;border-left:4px solid #3498db;transition:transform .2s ease}.challenge-item:hover{transform:translate(4px);box-shadow:0 2px 8px #0000001a}.challenge-info{flex:1}.challenge-title{font-weight:600;color:#2c3e50;margin-bottom:.5rem}.challenge-meta{display:flex;gap:.5rem;margin-bottom:.25rem;flex-wrap:wrap}.difficulty{padding:.2rem .6rem;border-radius:12px;font-size:.75rem;font-weight:500;text-transform:uppercase}.difficulty-junior{background:#d5f4e6;color:#27ae60}.difficulty-mid{background:#fef9e7;color:#f39c12}.difficulty-senior{background:#fadbd8;color:#e74c3c}.language{padding:.2rem .6rem;border-radius:12px;font-size:.75rem;font-weight:500;background:#ebf3fd;color:#3498db}.challenge-date{font-size:.8rem;color:#7f8c8d}.challenge-score{display:flex;align-items:center}.score{font-size:1.2rem;font-weight:700;padding:.5rem 1rem;border-radius:8px;min-width:60px;text-align:center}.score-excellent{background:#d5f4e6;color:#27ae60}.score-good{background:#fef9e7;color:#f39c12}.score-fair{background:#fadbd8;color:#e67e22}.score-poor{background:#fadbd8;color:#e74c3c}.no-challenges{color:#7f8c8d;font-style:italic;text-align:center;padding:2rem;background:#f8f9fa;border-radius:8px}.progress-visualization{background:#fff;border-radius:12px;box-shadow:0 4px 16px #0000001a;padding:2rem;border:1px solid #e9ecef}.progress-visualization h3{color:#2c3e50;margin-bottom:1.5rem;font-size:1.3rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin-bottom:2rem}.stat-card{text-align:center;padding:1.5rem 1rem;background:#f8f9fa;border-radius:8px;border:2px solid #e9ecef;transition:transform .2s ease}.stat-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.stat-value{font-size:2rem;font-weight:700;color:#2c3e50;margin-bottom:.5rem}.stat-value.trend-improving{color:#27ae60}.stat-value.trend-declining{color:#e74c3c}.stat-value.trend-stable{color:#3498db}.stat-label{font-size:.9rem;color:#7f8c8d;font-weight:500}.performance-section{margin-bottom:2rem}.performance-section h4{color:#2c3e50;margin-bottom:1rem;font-size:1.1rem}.performance-chart{background:#f8f9fa;border-radius:8px;padding:1rem}.chart-container{display:flex;align-items:end;justify-content:center;gap:4px;height:120px;margin-bottom:.5rem}.chart-bar{width:20px;border-radius:2px 2px 0 0;transition:all .2s ease;cursor:pointer}.chart-bar:hover{opacity:.8;transform:scaleY(1.05)}.chart-labels{display:flex;justify-content:space-between;font-size:.8rem;color:#7f8c8d}.progress-rings{margin-top:1rem}.rings-container{display:flex;justify-content:center;gap:2rem;flex-wrap:wrap}.progress-ring{position:relative;display:flex;align-items:center;justify-content:center}.progress-text{position:absolute;text-align:center}.progress-percentage{display:block;font-size:1.2rem;font-weight:700;color:#2c3e50}.progress-label{display:block;font-size:.8rem;color:#7f8c8d}.language-preference-editor{background:#fff;border-radius:12px;box-shadow:0 4px 16px #0000001a;padding:1.5rem;border:1px solid #e9ecef}.preference-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.preference-header h3{color:#2c3e50;margin:0;font-size:1.2rem}.edit-button{background:#3498db;color:#fff;border:none;padding:.5rem 1rem;border-radius:6px;cursor:pointer;font-size:.9rem;transition:background-color .2s ease}.edit-button:hover{background:#2980b9}.edit-button:disabled{background:#bdc3c7;cursor:not-allowed}.error-message{background:#fadbd8;color:#e74c3c;padding:.75rem;border-radius:6px;margin-bottom:1rem;border-left:4px solid #e74c3c}.current-preference{text-align:center}.language-display{display:flex;align-items:center;justify-content:center;gap:1rem;margin-bottom:1rem;padding:1rem;background:#f8f9fa;border-radius:8px}.language-display .language-icon{font-size:2rem}.language-display .language-name{font-size:1.2rem;font-weight:600;color:#2c3e50}.preference-description{color:#7f8c8d;font-size:.9rem;margin:0}.language-selector{margin-top:1rem}.languages-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:1.5rem}.language-option{cursor:pointer}.language-option input[type=radio]{display:none}.language-card{display:flex;align-items:center;gap:1rem;padding:1rem;border:2px solid #e9ecef;border-radius:8px;background:#fff;transition:all .2s ease}.language-option input[type=radio]:checked+.language-card{border-color:#3498db;background:#f8fbff;box-shadow:0 2px 8px #3498db33}.language-card:hover{border-color:#3498db;transform:translateY(-1px)}.language-card .language-icon{font-size:1.5rem;width:40px;text-align:center}.language-card .language-name{font-weight:500;color:#2c3e50}.editor-actions{display:flex;gap:1rem;justify-content:flex-end}.save-button{background:#27ae60;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:6px;cursor:pointer;font-weight:500;transition:background-color .2s ease}.save-button:hover{background:#229954}.save-button:disabled{background:#bdc3c7;cursor:not-allowed}.cancel-button{background:#95a5a6;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:6px;cursor:pointer;font-weight:500;transition:background-color .2s ease}.cancel-button:hover{background:#7f8c8d}.cancel-button:disabled{background:#bdc3c7;cursor:not-allowed}@media (max-width: 1024px){.profile-content{grid-template-columns:1fr}.profile-sidebar{order:-1}}@media (max-width: 768px){.profile-page{padding:.5rem}.profile-header{flex-direction:column;text-align:center;gap:1rem}.profile-avatar{width:60px;height:60px}.avatar-initial,.username{font-size:1.5rem}.stats-grid{grid-template-columns:repeat(2,1fr)}.rings-container{gap:1rem}.languages-grid{grid-template-columns:1fr}.editor-actions{flex-direction:column}.save-button,.cancel-button{width:100%}.challenge-item{flex-direction:column;align-items:flex-start;gap:.5rem}.challenge-score{align-self:flex-end}}@media (prefers-color-scheme: dark){.user-profile-card,.challenge-history,.progress-visualization,.language-preference-editor{background:#2c3e50;color:#ecf0f1;border-color:#34495e}.badge-item,.stat-card,.challenge-item,.performance-chart,.language-display,.language-card{background:#34495e;border-color:#4a5f7a}.no-badges,.no-challenges{background:#34495e;color:#bdc3c7}.username,.stat-value,.progress-percentage,.badge-name,.challenge-title,.language-card .language-name{color:#ecf0f1}.language-option input[type=radio]:checked+.language-card{background:#34495e;border-color:#3498db}}.error-boundary{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:2rem;background:#f5f5f5}.error-content{background:#fff;border-radius:12px;box-shadow:0 4px 20px #0000001a;padding:3rem;text-align:center;max-width:600px;width:100%}.error-content h2{color:#e74c3c;margin-bottom:1rem;font-size:2rem}.error-content p{color:#7f8c8d;margin-bottom:2rem;font-size:1.1rem;line-height:1.6}.error-details{margin:2rem 0;text-align:left}.error-details summary{cursor:pointer;color:#3498db;font-weight:500;margin-bottom:1rem}.error-details pre{background:#f8f9fa;padding:1rem;border-radius:6px;border-left:4px solid #e74c3c;overflow-x:auto;font-size:.9rem;color:#2c3e50;margin:.5rem 0}.error-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.global-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem;background:#fffffff2;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);border-radius:12px;box-shadow:0 4px 20px #0000001a;margin:2rem auto;max-width:400px}.global-loading-small{padding:1rem;max-width:200px}.global-loading-medium{padding:2rem;max-width:400px}.global-loading-large{padding:3rem;max-width:600px}.loading-spinner{margin-bottom:1rem}.spinner{width:40px;height:40px;border:4px solid #e9ecef;border-top:4px solid #3498db;border-radius:50%;animation:spin 1s linear infinite}.global-loading-small .spinner{width:24px;height:24px;border-width:3px}.global-loading-large .spinner{width:60px;height:60px;border-width:6px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading-message{color:#2c3e50;font-size:1rem;font-weight:500;margin:0;text-align:center}.global-loading-small .loading-message{font-size:.9rem}.global-loading-large .loading-message{font-size:1.2rem}.global-loading.overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#ffffffe6;z-index:9999;margin:0;max-width:none;border-radius:0;box-shadow:none}@media (prefers-color-scheme: dark){.error-boundary{background:#1a1a1a}.error-content{background:#2c3e50;color:#ecf0f1}.error-content h2{color:#e74c3c}.error-content p{color:#bdc3c7}.error-details pre{background:#34495e;color:#ecf0f1;border-color:#e74c3c}.global-loading{background:#2c3e50f2;color:#ecf0f1}.loading-message{color:#ecf0f1}.spinner{border-color:#34495e;border-top-color:#3498db}.global-loading.overlay{background:#1a1a1ae6}}@media (max-width: 768px){.error-boundary{padding:1rem}.error-content{padding:2rem 1.5rem}.error-content h2{font-size:1.5rem}.error-actions{flex-direction:column}.error-actions .btn{width:100%}.global-loading{margin:1rem;padding:1.5rem}}:root{--bg0: var(--bg-0);--bg1: var(--bg-1);--bg2: var(--bg-2);--bg3: var(--bg-3);--tx1: var(--tx-1);--tx2: var(--tx-2);--tx3: var(--tx-3);--r-sm: 8px;--r-md: 12px;--r-lg: 16px;--shadow: 0 12px 32px rgba(2, 6, 12, .45)}::selection{background:#2ee6a840}.rr .btn,a.btn,button.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:14px;border-radius:10px;padding:10px 18px;transition:.15s;border:1px solid transparent;min-height:42px;cursor:pointer;font-family:inherit;text-decoration:none;background:none;color:var(--tx1)}.btn-primary{background:linear-gradient(135deg,var(--mint) 0%,var(--mint-deep) 100%);color:var(--mint-ink);box-shadow:0 4px 18px #2ee6a838}.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px)}.btn-ghost{border-color:var(--line-strong);color:var(--tx1);background:#94a3b80a}.btn-ghost:hover{border-color:var(--mint);color:var(--mint)}.btn-soft{background:var(--bg3);color:var(--tx1)}.btn-soft:hover{background:#223247}.btn-secondary{border-color:var(--line-strong);color:var(--tx1);background:#94a3b80a}.btn-secondary:hover{border-color:var(--mint);color:var(--mint)}.btn-sm{padding:6px 12px;font-size:13px;min-height:34px;border-radius:8px}.btn-lg{padding:14px 26px;font-size:15px;border-radius:12px}.btn[disabled]{opacity:.4;cursor:not-allowed}.chip{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;border:1px solid;letter-spacing:.02em}.chip .dot{width:6px;height:6px;border-radius:50%;background:currentColor}.chip-mint{color:var(--mint);border-color:#2ee6a859;background:#2ee6a814}.chip-amber{color:var(--amber);border-color:#ffc75759;background:#ffc75714}.chip-rose{color:var(--rose);border-color:#ff809359;background:#ff809314}.chip-sky{color:var(--sky);border-color:#5cc8ff59;background:#5cc8ff14}.chip-violet{color:var(--violet);border-color:#b18cff59;background:#b18cff14}.chip-slate{color:var(--tx2);border-color:var(--line-strong);background:#94a3b80f}.card{background:var(--bg1);border:1px solid var(--line);border-radius:var(--r-lg)}.mono{font-family:var(--font-mono)}.muted{color:var(--tx2)}.dim{color:var(--tx3)}.eyebrow{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--mint)}.mk-nav{position:sticky;top:0;z-index:50;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#0b0f14d1;border-bottom:1px solid var(--line)}.mk-nav-inner{max-width:1120px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:14px 24px}.mk-links{display:flex;gap:4px}.mk-links a{padding:8px 14px;border-radius:8px;font-size:14px;font-weight:500;color:var(--tx2);text-decoration:none}.mk-links a:hover{color:var(--tx1);background:var(--bg2)}.mk-links a.active{color:var(--mint)}.footer{border-top:1px solid var(--line);margin-top:96px}.footer-inner{max-width:1120px;margin:0 auto;padding:40px 24px;display:flex;justify-content:space-between;align-items:flex-start;gap:32px;flex-wrap:wrap}.footer a{color:var(--tx3);font-size:13px;display:block;margin-top:8px;text-decoration:none}.footer a:hover{color:var(--tx1)}.logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none}.logo-word{font-family:var(--font-display);font-size:19px;letter-spacing:-.02em}.logo-word .w1{font-weight:400;color:var(--tx2)}.logo-word .w2{font-weight:800;color:var(--tx1)}.logo-word .tld{font-family:var(--font-mono);font-size:11px;color:var(--mint);margin-left:2px;font-weight:500}.hero{max-width:1120px;margin:0 auto;padding:88px 24px 40px;text-align:center;position:relative}.hero:before{content:"";position:absolute;inset:-120px 0 auto;height:420px;background:radial-gradient(600px 260px at 50% 0,rgba(46,230,168,.1),transparent 70%);pointer-events:none}.hero h1{font-size:clamp(34px,5vw,58px);letter-spacing:-.03em;max-width:820px;margin:18px auto 0;font-weight:800;font-family:var(--font-display);line-height:1.15}.hero h1 .grad{background:linear-gradient(90deg,var(--mint),var(--sky));-webkit-background-clip:text;background-clip:text;color:transparent}.hero p.sub{max-width:600px;margin:20px auto 0;font-size:17px;color:var(--tx2)}.hero-ctas{display:flex;gap:14px;justify-content:center;margin-top:32px;flex-wrap:wrap}.hero-proof{display:flex;gap:28px;justify-content:center;margin-top:28px;color:var(--tx3);font-size:13px;flex-wrap:wrap}.hero-proof b{color:var(--tx1);font-weight:600}.mockwin{max-width:980px;margin:56px auto 0;border:1px solid var(--line-strong);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow);background:var(--bg1);text-align:left}.mockwin-bar{display:flex;align-items:center;gap:8px;padding:10px 16px;background:var(--bg2);border-bottom:1px solid var(--line)}.mockwin-bar i{width:10px;height:10px;border-radius:50%;background:var(--bg3);display:inline-block}.mockwin-bar .addr{margin-left:12px;font-family:var(--font-mono);font-size:12px;color:var(--tx3);background:var(--bg0);border:1px solid var(--line);border-radius:6px;padding:3px 12px}.mock-diff{display:grid;grid-template-columns:1fr 300px}.mock-diff-code{padding:18px 0;font-family:var(--font-mono);font-size:12.5px;line-height:1.9;overflow:hidden}.mline{display:flex;gap:14px;padding:0 18px;white-space:pre}.mline .ln{width:26px;text-align:right;color:var(--tx3);flex-shrink:0;-webkit-user-select:none;user-select:none}.mline.add{background:#2ee6a812}.mline.add .ln{color:var(--mint)}.mline.del{background:#ff809312}.mline.del .ln{color:var(--rose)}.mline.flag{background:#ffc7571a;box-shadow:inset 3px 0 0 var(--amber)}.mock-side{border-left:1px solid var(--line);padding:18px;background:var(--bg2)}.k{color:var(--violet)}.s{color:var(--mint)}.f{color:var(--sky)}.c{color:var(--tx3)}.section{max-width:1120px;margin:96px auto 0;padding:0 24px}.section-head{text-align:center;max-width:640px;margin:0 auto 48px}.section-head h2{font-size:32px;letter-spacing:-.02em;margin-top:12px;font-family:var(--font-display)}.section-head p{color:var(--tx2);margin-top:12px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.feature{padding:28px}.feature .ico{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;font-size:20px}.feature h3{font-size:17px;margin-bottom:8px;font-family:var(--font-display)}.feature p{font-size:14px;color:var(--tx2)}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.step{padding:28px;position:relative}.step .num{font-family:var(--font-display);font-weight:800;font-size:15px;width:32px;height:32px;border-radius:50%;background:#2ee6a81f;color:var(--mint);display:flex;align-items:center;justify-content:center;margin-bottom:16px}.step h3{font-family:var(--font-display)}.cta-band{margin:96px auto 0;max-width:1120px;padding:0 24px}.cta-band .card{padding:56px;text-align:center;background:linear-gradient(160deg,var(--bg2),var(--bg1));position:relative;overflow:hidden}.cta-band .card:before{content:"";position:absolute;inset:auto -80px -140px auto;width:340px;height:340px;background:radial-gradient(circle,rgba(46,230,168,.14),transparent 65%)}.cta-band h2{font-family:var(--font-display)}.pricing-wrap{max-width:960px;margin:0 auto;padding:72px 24px 0}.pricing-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:24px;margin-top:48px;align-items:start}.price-card{padding:32px}.price-card.hot{border-color:#2ee6a866;background:linear-gradient(180deg,rgba(46,230,168,.05),transparent 40%),var(--bg1);position:relative}.price-card h3{font-family:var(--font-display)}.price-card .amount{font-family:var(--font-display);font-size:44px;font-weight:800;letter-spacing:-.02em}.price-card .amount small{font-size:15px;color:var(--tx3);font-weight:500}.plist{list-style:none;margin:22px 0;display:grid;gap:12px;padding:0}.plist li{display:flex;gap:10px;font-size:14px;color:var(--tx2);align-items:flex-start}.plist li svg{flex-shrink:0;margin-top:3px}.guarantee{display:flex;gap:12px;background:#2ee6a80f;border:1px solid rgba(46,230,168,.22);border-radius:12px;padding:14px 16px;font-size:13px;color:var(--tx2);margin-top:20px}.rr-sidebar{width:232px;flex-shrink:0;border-right:1px solid var(--line);background:var(--bg1);display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.rr-sidebar .logo{padding:20px 20px 16px}.snav{padding:8px 12px;display:grid;gap:2px}.snav a{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px;font-size:14px;font-weight:500;color:var(--tx2);text-decoration:none}.snav a svg{opacity:.75}.snav a:hover{background:var(--bg2);color:var(--tx1)}.snav a.active{background:#2ee6a81a;color:var(--mint)}.snav a.active svg{opacity:1}.snav .label{padding:18px 14px 6px;font-size:11px;font-weight:700;letter-spacing:.1em;color:var(--tx3);text-transform:uppercase}.side-foot{margin-top:auto;padding:16px;border-top:1px solid var(--line)}.streak-card{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:flex;align-items:center;gap:12px}.streak-card b{font-size:15px}.rr-main{flex:1;min-width:0}.topbar{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:16px;padding:12px 28px;border-bottom:1px solid var(--line);background:#0b0f14d9;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.searchbox{flex:1;max-width:420px;display:flex;align-items:center;gap:10px;background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:8px 14px;color:var(--tx3);font-size:13.5px}.searchbox kbd{margin-left:auto;font-family:var(--font-mono);font-size:11px;background:var(--bg0);border:1px solid var(--line);border-radius:5px;padding:1px 6px}.xp-pill{display:flex;align-items:center;gap:10px;margin-left:auto;background:var(--bg2);border:1px solid var(--line);border-radius:999px;padding:6px 14px 6px 8px;font-size:13px}.xp-pill .bar{width:90px;height:6px;border-radius:3px;background:var(--bg3);overflow:hidden}.xp-pill .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--mint-deep),var(--mint));border-radius:3px}.avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,#3d5afe,#00b0ff);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;color:#fff}.content{padding:28px;max-width:1180px;margin:0 auto}.page-title{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;flex-wrap:wrap}.page-title h1{font-size:26px;letter-spacing:-.02em;font-family:var(--font-display)}.page-title p{color:var(--tx2);font-size:14px;margin-top:4px}.dash-grid{display:grid;grid-template-columns:2fr 1fr;gap:20px}.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}.stat{padding:18px 20px}.stat .v{font-family:var(--font-display);font-size:26px;font-weight:800;letter-spacing:-.02em;display:flex;align-items:baseline;gap:6px}.stat .v small{font-size:12px;color:var(--mint);font-weight:600}.stat .l{font-size:12.5px;color:var(--tx3);margin-top:2px}.resume{padding:24px;display:flex;gap:22px;align-items:center;background:linear-gradient(135deg,rgba(46,230,168,.07),transparent 55%),var(--bg1)}.resume .ring{flex-shrink:0}.list-card{padding:8px}.list-card .head{display:flex;justify-content:space-between;align-items:center;padding:14px 16px 10px}.list-card .head h3{font-size:15px;font-family:var(--font-display)}.list-card .head a{font-size:13px;color:var(--mint);font-weight:600;text-decoration:none}.row-item{display:flex;align-items:center;gap:14px;padding:12px 16px;border-radius:12px;transition:.12s;text-decoration:none;color:inherit}.row-item:hover{background:var(--bg2)}.row-item .ttl{font-weight:600;font-size:14px}.row-item .sub{font-size:12.5px;color:var(--tx3);margin-top:1px}.lang-badge{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:11px;font-weight:700;flex-shrink:0}.lang-java{background:#ffc7571f;color:var(--amber)}.lang-py{background:#5cc8ff1f;color:var(--sky)}.lang-cs{background:#b18cff1f;color:var(--violet)}.lang-js{background:#2ee6a81f;color:var(--mint)}.mini-track{display:grid;gap:14px;padding:6px 16px 16px}.mini-track .t{display:flex;align-items:center;gap:12px;font-size:13.5px}.mini-track .bar{flex:1;height:6px;background:var(--bg3);border-radius:3px;overflow:hidden}.mini-track .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--mint-deep),var(--mint));border-radius:3px}.filters{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:20px}.seg{display:inline-flex;background:var(--bg1);border:1px solid var(--line);border-radius:10px;padding:3px;gap:2px}.seg button{padding:7px 14px;border-radius:8px;font-size:13px;font-weight:600;color:var(--tx2);background:none;border:none;cursor:pointer;font-family:inherit}.seg button.active{background:var(--bg3);color:var(--tx1)}.seg button.active.mint{background:#2ee6a824;color:var(--mint)}.fsearch{display:flex;align-items:center;gap:8px;background:var(--bg1);border:1px solid var(--line);border-radius:10px;padding:8px 14px;font-size:13.5px;color:var(--tx3);min-width:220px}.fsearch input{background:none;border:none;color:var(--tx1);font-family:inherit;font-size:13.5px;outline:none;width:100%}.ch-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.ch-card{padding:20px;display:flex;flex-direction:column;gap:12px;transition:.15s;position:relative;text-decoration:none;color:inherit}.ch-card:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--shadow)}.ch-card .top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}.ch-card h3{font-size:15.5px;line-height:1.4;font-weight:600;font-family:var(--font-body)}.ch-card .meta{display:flex;gap:8px;flex-wrap:wrap}.ch-card .foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:12px;border-top:1px solid var(--line);font-size:12.5px;color:var(--tx3)}.ch-card .go{color:var(--mint);font-weight:600;display:flex;align-items:center;gap:5px}.done-tick{position:absolute;top:-7px;right:-7px;width:24px;height:24px;border-radius:50%;background:var(--mint);color:var(--mint-ink);display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px #2ee6a866}.review-wrap{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:0}.review-main{overflow-y:auto;padding:20px 24px}.review-side{border-left:1px solid var(--line);background:var(--bg1);overflow-y:auto;padding:20px}.review-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px;flex-wrap:wrap}.review-head .crumb{font-size:13px;color:var(--tx3)}.review-head .crumb a{color:var(--mint);text-decoration:none}.prbox{padding:16px 20px;margin-bottom:16px}.prbox h2{font-size:18px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}.prbox .desc{font-size:13.5px;color:var(--tx2);margin-top:6px}.difftool{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:var(--bg1)}.difftool .fbar{display:flex;align-items:center;gap:10px;padding:10px 16px;background:var(--bg2);border-bottom:1px solid var(--line);font-family:var(--font-mono);font-size:12.5px}.difftool .fbar .stats{margin-left:auto;display:flex;gap:10px;font-size:12px}.diff{font-family:var(--font-mono);font-size:12.8px;line-height:1.85;padding:10px 0}.dline{display:flex;cursor:pointer;position:relative}.dline:hover{background:#5cc8ff0d}.dline .lnum{width:52px;flex-shrink:0;text-align:right;padding-right:14px;color:var(--tx3);-webkit-user-select:none;user-select:none;position:relative}.dline .code{white-space:pre;flex:1;padding-right:16px}.dline.add{background:#2ee6a80f}.dline.add .lnum{color:var(--mint)}.dline.del{background:#ff80930f}.dline.del .lnum{color:var(--rose)}.dline.commented{box-shadow:inset 3px 0 0 var(--amber)}.dline:hover .lnum:after{content:"+";position:absolute;left:6px;color:var(--mint-ink);background:var(--mint);width:16px;height:16px;line-height:16px;text-align:center;border-radius:4px;font-weight:700;top:50%;transform:translateY(-50%)}.composer{display:none;background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 20px 16px 52px}.composer.open{display:block}.composer .cats{display:flex;gap:8px;margin-bottom:10px;flex-wrap:wrap}.composer .cats button{font-size:12px;font-weight:600;padding:4px 12px;border-radius:999px;border:1px solid var(--line-strong);color:var(--tx2);background:none;cursor:pointer;font-family:inherit}.composer textarea{width:100%;background:var(--bg0);border:1px solid var(--line-strong);border-radius:10px;color:var(--tx1);font-family:inherit;font-size:13.5px;padding:10px 14px;resize:vertical;min-height:64px}.composer .acts{display:flex;gap:10px;margin-top:10px;justify-content:flex-end;align-items:center}.side-block{margin-bottom:22px}.side-block h4{font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--tx3);margin-bottom:12px}.checklist{display:grid;gap:10px}.checklist label{display:flex;gap:10px;font-size:13.5px;color:var(--tx2);align-items:flex-start;cursor:pointer}.checklist input{accent-color:var(--mint);margin-top:3px}.comment-pill{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:13px;margin-bottom:10px}.comment-pill .l{font-family:var(--font-mono);font-size:11px;color:var(--amber)}.hintbox{background:#ffc7570f;border:1px solid rgba(255,199,87,.25);border-radius:12px;padding:14px;font-size:13px;color:var(--tx2)}.score-hero{display:flex;gap:32px;align-items:center;padding:32px;margin-bottom:20px;background:linear-gradient(135deg,rgba(46,230,168,.08),transparent 60%),var(--bg1);flex-wrap:wrap}.findings{display:grid;grid-template-columns:1fr 1fr;gap:20px}.finding{display:flex;gap:12px;padding:14px 16px;border-radius:12px;background:var(--bg2);border:1px solid var(--line);font-size:13.5px;margin-bottom:10px}.finding .ln{font-family:var(--font-mono);font-size:11px;flex-shrink:0;margin-top:2px}.ai-note{border-left:3px solid var(--sky);background:#5cc8ff0d;padding:10px 14px;border-radius:0 10px 10px 0;font-size:13px;color:var(--tx2);margin-top:8px}.academy-wrap{display:grid;grid-template-columns:260px minmax(0,1fr);gap:28px}.toc{position:sticky;top:85px;align-self:start;padding:14px}.toc a{display:flex;gap:12px;align-items:center;padding:10px 12px;border-radius:10px;font-size:13.5px;color:var(--tx2);text-decoration:none}.toc a:hover{background:var(--bg2)}.toc a.active{background:#2ee6a81a;color:var(--mint);font-weight:600}.toc .st{width:22px;height:22px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;border:1.5px solid var(--line-strong);color:var(--tx3)}.toc .st.done{background:var(--mint);border-color:var(--mint);color:var(--mint-ink)}.toc .st.now{border-color:var(--mint);color:var(--mint)}.article{max-width:720px}.article h1{font-size:30px;letter-spacing:-.02em;margin:6px 0 10px;font-family:var(--font-display)}.article .lede{font-size:16px;color:var(--tx2)}.article h2{font-size:21px;margin:36px 0 12px;font-family:var(--font-display)}.article p{color:var(--tx2);margin:12px 0;font-size:14.5px}.article b,.article strong{color:var(--tx1);font-weight:600}.article ul,.article ol{color:var(--tx2);margin:12px 0;padding-left:22px;font-size:14.5px}.article li{margin:6px 0}.article blockquote{border-left:3px solid var(--mint);padding-left:16px;margin:16px 0;color:var(--tx1);font-style:italic}.article h4{font-family:var(--font-display);font-size:16px;margin:22px 0 8px}.quote{border-left:3px solid var(--mint);padding:4px 0 4px 20px;margin:24px 0;font-style:italic;color:var(--tx1);font-size:15px}.quote .who{display:block;font-style:normal;font-size:12.5px;color:var(--tx3);margin-top:8px}.layers{display:grid;gap:10px;margin:18px 0}.layer{display:flex;gap:14px;padding:14px 16px;background:var(--bg1);border:1px solid var(--line);border-radius:12px;font-size:13.5px}.layer .n{font-family:var(--font-mono);color:var(--mint);flex-shrink:0}.practice{margin-top:36px;padding:22px}.practice h3{font-size:16px;margin-bottom:4px;font-family:var(--font-display)}.chapter-nav{display:flex;justify-content:space-between;margin-top:32px;gap:12px}.profile-head{display:flex;gap:24px;align-items:center;padding:28px;margin-bottom:20px;flex-wrap:wrap}.big-avatar{width:76px;height:76px;border-radius:50%;background:linear-gradient(135deg,#3d5afe,#00b0ff);display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:800;color:#fff;font-family:var(--font-display);flex-shrink:0}.profile-grid{display:grid;grid-template-columns:2fr 1fr;gap:20px;align-items:start}.badges-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:16px}.badge-tile{text-align:center;padding:16px 8px;border-radius:12px;background:var(--bg2);border:1px solid var(--line);font-size:11.5px;color:var(--tx2)}.badge-tile .e{font-size:24px;display:block;margin-bottom:6px}.badge-tile.locked{opacity:.35;filter:grayscale(1)}.hist-row{display:flex;align-items:center;gap:14px;padding:12px 16px;border-top:1px solid var(--line);font-size:13.5px}.hist-row:first-of-type{border-top:none}.score-chip{font-family:var(--font-mono);font-weight:700;font-size:13px;margin-left:auto}.sub-line{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--line);font-size:13.5px}.sub-line:last-child{border-bottom:none}.rr-hamburger{display:none;background:none;border:none;cursor:pointer;color:var(--tx1);padding:6px;margin-right:4px}.rr-nav-backdrop{display:none}@media (max-width: 960px){.grid3,.steps,.ch-grid,.dash-grid,.profile-grid,.findings,.pricing-grid,.academy-wrap{grid-template-columns:1fr}.toc{position:static}.review-wrap{grid-template-columns:1fr}.review-side{border-left:none;border-top:1px solid var(--line)}.stat-row{grid-template-columns:repeat(2,1fr)}.rr-hamburger{display:inline-flex;align-items:center}.rr-sidebar{position:fixed;top:0;left:0;z-index:70;height:100vh;transform:translate(-100%);transition:transform .2s ease;box-shadow:var(--shadow)}.rr-sidebar.open{transform:translate(0)}.rr-nav-backdrop.open{display:block;position:fixed;top:0;right:0;bottom:0;left:0;z-index:60;background:#02060c8c}}