:root{--jb-bg-primary: #1e1f22;--jb-bg-secondary: #2b2d30;--jb-bg-elevated: #313438;--jb-text-primary: #bcbec4;--jb-text-secondary: #868a91;--jb-text-disabled: #5c6065;--jb-accent-blue: #4a9eff;--jb-accent-orange: #ff6b35;--jb-accent-green: #3bea62;--jb-border: #43454a;--jb-border-focus: #4a9eff;--jb-shadow: rgba(0, 0, 0, .25);--jb-font-family: "Inter", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--jb-font-mono: "JetBrains Mono", "SF Mono", "Monaco", "Cascadia Code", monospace}*{box-sizing:border-box}body{margin:0;font-family:var(--jb-font-family);background:linear-gradient(135deg,var(--jb-bg-primary) 0%,#1a1b1e 100%);background-color:var(--jb-bg-primary);color:var(--jb-text-primary);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{max-width:1200px;margin:0 auto;padding:2rem 1rem;min-height:100vh}header{text-align:center;margin-bottom:3rem;padding:2rem 0}header h1{font-size:2.5rem;font-weight:700;background:linear-gradient(135deg,var(--jb-accent-blue),var(--jb-accent-orange));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:0;letter-spacing:-.02em}.controls{display:flex;align-items:center;gap:1rem;justify-content:center;margin-bottom:3rem}.charts{display:grid;grid-template-columns:1fr;gap:2rem}@media (min-width: 1024px){.charts{grid-template-columns:1fr 1fr}}.chart-container{background:var(--jb-bg-secondary);border-radius:12px;padding:1.5rem;border:1px solid var(--jb-border);box-shadow:0 8px 32px var(--jb-shadow);transition:all .3s ease;position:relative;overflow:hidden}.chart-container:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--jb-accent-blue),var(--jb-accent-orange),var(--jb-accent-green),var(--jb-accent-blue));background-size:300% 300%;animation:gradientShift 4s ease-in-out infinite}.chart-container:hover{transform:translateY(-2px);box-shadow:0 12px 40px var(--jb-shadow)}.chart-title{text-align:center;margin-bottom:.5rem;font-size:1.25rem;font-weight:600;color:var(--jb-text-primary);letter-spacing:-.01em}.chart-subtitle{color:var(--jb-text-secondary);font-size:.875rem;text-align:center;margin-bottom:1.5rem;font-weight:400}.status{text-align:center;font-size:1.1rem;padding:1rem;border-radius:8px;margin:1rem 0;background:var(--jb-bg-elevated);border:1px solid var(--jb-border)}.status.error{color:var(--jb-accent-orange);background:#ff6b351a;border-color:var(--jb-accent-orange)}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--jb-bg-primary)}::-webkit-scrollbar-thumb{background:var(--jb-border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--jb-text-disabled)}@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.skeleton{background:linear-gradient(90deg,var(--jb-bg-elevated) 25%,var(--jb-bg-secondary) 50%,var(--jb-bg-elevated) 75%);background-size:200% 100%;animation:skeleton-loading 1.5s infinite;border-radius:4px}@keyframes skeleton-loading{0%{background-position:200% 0}to{background-position:-200% 0}}.chart-skeleton{background:var(--jb-bg-secondary);border-radius:12px;padding:1.5rem;border:1px solid var(--jb-border);box-shadow:0 8px 32px var(--jb-shadow);position:relative;overflow:hidden}.chart-skeleton:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--jb-accent-blue),var(--jb-accent-orange))}.chart-title-skeleton{height:24px;width:60%;margin:0 auto .5rem}.chart-subtitle-skeleton{height:16px;width:40%;margin:0 auto 1.5rem;opacity:.7}.bar-chart-skeleton{display:flex;align-items:flex-end;justify-content:space-between;height:300px;padding:20px 0;gap:8px}.bar-skeleton{flex:1;max-width:40px;border-radius:4px 4px 0 0;opacity:.8}.bar-skeleton:nth-child(1){height:80%}.bar-skeleton:nth-child(2){height:60%}.bar-skeleton:nth-child(3){height:90%}.bar-skeleton:nth-child(4){height:45%}.bar-skeleton:nth-child(5){height:70%}.bar-skeleton:nth-child(6){height:55%}.bar-skeleton:nth-child(7){height:85%}.bar-skeleton:nth-child(8){height:40%}.horizontal-bar-chart-skeleton{display:flex;flex-direction:column;justify-content:center;height:250px;gap:20px;padding:20px 0}.horizontal-bar-skeleton{height:32px;border-radius:0 4px 4px 0;opacity:.8}.horizontal-bar-skeleton:nth-child(1){width:75%}.horizontal-bar-skeleton:nth-child(2){width:90%}.horizontal-bar-skeleton:nth-child(3){width:45%}.category-select-skeleton{background:var(--jb-bg-secondary);border-radius:12px;border:1px solid var(--jb-border);padding:1.5rem;margin:0 auto 3rem;display:flex;flex-direction:column;align-items:center;gap:1rem}.category-label-skeleton{height:20px;width:120px}.category-dropdown-skeleton{height:42px;width:100%;border-radius:8px}.category-hint-skeleton{height:32px;width:400px;border-radius:6px;opacity:.6}@media (max-width: 640px){.category-dropdown-skeleton,.category-hint-skeleton{width:100%}.bar-chart-skeleton{height:250px}}.no-data-container{background-color:var(--jb-bg-elevated);border:1px solid var(--jb-border);border-radius:8px;padding:1.5rem;margin:1rem 0;text-align:center;min-height:200px;display:flex;align-items:center;justify-content:center}.no-data-content{max-width:400px;width:100%}.no-data-icon{font-size:2rem;margin-bottom:.75rem;opacity:.6}.no-data-title{color:var(--jb-text-primary);font-size:1.1rem;font-weight:600;margin:0 0 .5rem;letter-spacing:-.01em}.no-data-message{color:var(--jb-text-secondary);font-size:.9rem;line-height:1.4;margin:0 0 1rem}.no-data-suggestions{text-align:left;margin-top:1rem}.no-data-suggestions-label{color:var(--jb-text-primary);font-size:.85rem;font-weight:600;margin:0 0 .5rem}.no-data-suggestions ul{list-style:none;padding:0;margin:0}.no-data-suggestions li{color:var(--jb-text-secondary);font-size:.8rem;line-height:1.3;position:relative;padding:.15rem 0 .15rem 1rem}.no-data-suggestions li:before{content:"•";color:var(--jb-accent-blue);font-weight:700;position:absolute;left:0}@media (max-width: 768px){.no-data-container{padding:1.25rem;min-height:180px}.no-data-icon{font-size:1.75rem}.no-data-title{font-size:1rem}}.category-chart-tooltip{background-color:var(--jb-bg-elevated)!important;padding:12px 16px!important;border:1px solid var(--jb-border)!important;border-radius:8px!important;box-shadow:0 8px 32px #0000004d!important;color:var(--jb-text-primary)!important;font-family:var(--jb-font-family)!important}.category-chart-tooltip-title{margin:0 0 4px;font-weight:600;font-size:.9rem}.category-chart-tooltip-value{margin:0;color:var(--jb-accent-blue);font-size:.85rem}.difficulty-chart-tooltip{background-color:var(--jb-bg-elevated)!important;padding:12px 16px!important;border:1px solid var(--jb-border)!important;border-radius:8px!important;box-shadow:0 8px 32px #0000004d!important;color:var(--jb-text-primary)!important;font-family:var(--jb-font-family)!important}.difficulty-chart-tooltip-title{margin:0 0 4px;font-weight:600;font-size:.9rem}.difficulty-chart-tooltip-value{margin:0;color:var(--jb-accent-green);font-size:.85rem}.error-display-compact{background-color:var(--jb-bg-secondary);border:1px solid var(--jb-accent-orange);border-radius:6px;padding:.75rem 1rem;margin:.5rem 0;display:flex;align-items:center;justify-content:center}.error-content-compact{display:flex;align-items:center;gap:.75rem}.error-icon-compact{font-size:1.2rem;opacity:.8}.error-title-compact{color:var(--jb-accent-orange);font-size:.9rem;font-weight:600;margin:0}.retry-button-compact{background:var(--jb-accent-orange);border:none;border-radius:4px;color:#fff;font-family:var(--jb-font-family);font-size:.8rem;font-weight:600;padding:.4rem .8rem;cursor:pointer;transition:all .2s ease}.retry-button-compact:hover{background:#ff8c42;transform:translateY(-1px)}.retry-button-compact:active{transform:translateY(0)}.category-select-container{display:flex;flex-direction:column;align-items:center;gap:1rem;padding:1.5rem;background:var(--jb-bg-secondary);border-radius:12px;border:1px solid var(--jb-border);margin-left:auto;margin-right:auto;margin-bottom:3rem}.category-label{font-weight:600;color:var(--jb-text-primary);font-size:1rem;letter-spacing:-.01em}.select-wrapper{position:relative;width:100%}.spinner{position:absolute;left:-2.5rem;top:50%;transform:translateY(-50%);width:20px;height:20px;border:2px solid var(--jb-border);border-top-color:var(--jb-accent-blue);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:translateY(-50%) rotate(360deg)}}.category-select{width:100%;padding:.75rem 1rem;font-size:.95rem;color:var(--jb-text-primary);border:1px solid var(--jb-border);border-radius:8px;background:var(--jb-bg-elevated);appearance:none;-webkit-appearance:none;-moz-appearance:none;cursor:pointer;transition:all .2s ease;font-family:var(--jb-font-family);position:relative}.category-select:hover{border-color:var(--jb-accent-blue);background:var(--jb-bg-secondary)}.category-select:focus{outline:none;border-color:var(--jb-border-focus);box-shadow:0 0 0 3px #4a9eff33;background:var(--jb-bg-secondary)}.category-select:disabled{color:var(--jb-text-disabled);background:var(--jb-bg-primary);cursor:not-allowed;border-color:var(--jb-border)}.category-select option{background:var(--jb-bg-elevated);color:var(--jb-text-primary);padding:.5rem}.select-wrapper:after{content:"▼";position:absolute;right:1rem;top:50%;transform:translateY(-50%);color:var(--jb-text-secondary);pointer-events:none;font-size:.75rem}.category-hint{color:var(--jb-text-secondary);font-size:.8rem;text-align:center;line-height:1.4;background:var(--jb-bg-primary);padding:.75rem 1rem;border-radius:6px;border:1px solid var(--jb-border);max-width:800px}@media (max-width: 640px){.category-select-container{padding:1rem}.select-wrapper{width:100%}.category-hint{font-size:.75rem;padding:.5rem .75rem}}