:root{--bg-page: #f8fafc;--bg-surface: #ffffff;--bg-elevated: #f1f5f9;--bg-muted: #e2e8f0;--text-primary: #1e293b;--text-secondary: #475569;--text-muted: #64748b;--border-default: #e2e8f0;--border-strong: #cbd5e1;--accent-blue: #0ea5e9;--accent-blue-muted: #64748b;--accent-green: #10b981;--accent-red: #f43f5e;--accent-yellow: #eab308;--accent-purple: #8b5cf6;--accent-orange: #f97316;--status-success: #4ade80;--status-success-bg: #f0fdf4;--status-error: #f87171;--status-error-bg: #fef2f2;--status-warning: #fbbf24;--status-warning-bg: #fffbeb;--node-skill: #0ea5e9;--node-lc: #10b981;--node-mc: #f43f5e;--node-domain: #8b5cf6;--interactive-hover: #f1f5f9;--interactive-active: #e2e8f0;--focus-ring: #6b8cae;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;color:var(--text-primary);background-color:var(--bg-page);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:var(--accent-blue);text-decoration:inherit}::placeholder{color:var(--text-muted);opacity:.7}textarea::placeholder{color:var(--text-muted);opacity:.7}a:hover{color:#5a7a9c}body{margin:0;min-width:320px;min-height:100vh}#root{width:100%}.node-details-drawer{position:fixed;inset:0;z-index:100;pointer-events:none}.drawer-backdrop{position:absolute;inset:0;background:#0000001a;pointer-events:auto;animation:fadeIn .2s ease-out}.drawer-panel{position:absolute;top:0;right:0;width:360px;max-width:90vw;height:100%;background:var(--bg-surface);border-left:1px solid var(--border-default);box-shadow:-4px 0 20px #0000001a;overflow-y:auto;padding:1.5rem;pointer-events:auto;animation:slideIn .2s ease-out;word-wrap:break-word}@keyframes slideIn{0%{transform:translate(100%)}to{transform:translate(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}*{box-sizing:border-box}body{margin:0;padding:0;background:var(--bg-page);color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif}.app{min-height:100vh;display:flex;flex-direction:column}.app.loading,.app.error{justify-content:center;align-items:center}.loading-spinner{color:var(--text-secondary);font-size:1.25rem}.error-message{text-align:center;max-width:400px}.error-message h2{color:var(--status-error)}.error-message p{color:var(--text-secondary)}.app-header{background:var(--bg-surface);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-default)}.header-content h1{margin:0;font-size:1.5rem;font-weight:600}.header-content .subtitle{margin:.25rem 0 0;color:var(--text-secondary);font-size:.875rem}.app-nav{display:flex;gap:.5rem}.app-nav button{padding:.5rem 1rem;border-radius:8px;border:none;background:transparent;color:var(--text-secondary);cursor:pointer;font-size:.875rem;transition:all .2s}.app-nav button:hover{background:var(--interactive-hover);color:var(--text-primary)}.app-nav button.active{background:var(--accent-blue);color:#fff}.app-main{flex:1;padding:2rem;max-width:1200px;margin:0 auto;width:100%}.app-footer{background:var(--bg-surface);padding:1rem 2rem;text-align:center;border-top:1px solid var(--border-default)}.app-footer p{margin:0;color:var(--text-muted);font-size:.875rem}.app-footer a{color:var(--accent-blue);text-decoration:none}.app-footer a:hover{text-decoration:underline}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-elevated)}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@media(max-width:768px){.app-header{flex-direction:column;gap:1rem}.app-main{padding:1rem}.results-panel>div{grid-template-columns:1fr!important}.practice-mode>div:last-child{grid-template-columns:1fr!important}}