.main-header{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1rem 2rem;background:#0f172ad9;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:1000;width:100%}.header-brand{display:flex;flex-direction:column}.brand-logo{display:flex;align-items:center;gap:8px;text-decoration:none;font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,var(--blue-bright) 0%,var(--accent-cyan) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.02em}.logo-icon{background:linear-gradient(135deg,var(--blue-bright) 0%,var(--accent-cyan) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-weight:900}.brand-tagline{font-size:.72rem;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.08em;margin-top:2px}.header-nav{display:flex;align-items:center;gap:1.5rem}.nav-item{color:var(--text-secondary);text-decoration:none;font-weight:600;font-size:.95rem;transition:color .2s ease;cursor:pointer;background:none;border:none;font-family:inherit;padding:.35rem 0}.nav-item:hover,.nav-item.active{color:var(--blue-bright)}.nav-dropdown{position:relative}.dropdown-toggle{display:flex;align-items:center;gap:4px}.dropdown-toggle:after{content:"▾";font-size:.8rem;transition:transform .2s ease}.nav-dropdown.open .dropdown-toggle:after{transform:rotate(180deg)}.dropdown-menu{display:none;position:absolute;top:100%;right:0;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-md);padding:.5rem 0;min-width:200px;z-index:1100;margin-top:8px;animation:dropdownFadeIn .2s ease-out}.dropdown-menu:before{content:"";position:absolute;top:-10px;left:0;right:0;height:10px}.nav-dropdown.open .dropdown-menu{display:block}@keyframes dropdownFadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.dropdown-menu a{display:block;padding:.6rem 1.2rem;color:var(--text-secondary);text-decoration:none;font-size:.9rem;font-weight:600;transition:background .2s ease,color .2s ease,padding-left .2s ease}.dropdown-menu a:hover,.dropdown-menu a:focus-visible{background:#3b82f614;color:var(--blue-bright);padding-left:1.4rem}.dropdown-menu a.active{color:var(--blue-bright);background:#3b82f61f;box-shadow:inset 3px 0 0 var(--blue-primary)}.menu-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;padding:0 9px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer}.menu-toggle span{display:block;height:2px;background:var(--text-primary);border-radius:2px;transition:transform .2s ease,opacity .2s ease}.menu-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}.menu-toggle.open span:nth-child(2){opacity:0}.menu-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}@media (max-width: 768px){.main-header{padding:.75rem 1rem;flex-wrap:wrap}.brand-logo{font-size:1.3rem}.brand-tagline{display:none}.menu-toggle{display:flex}.header-nav{display:none;width:100%;flex-direction:column;align-items:stretch;gap:0;max-height:calc(100vh - 70px);overflow-y:auto;border-top:1px solid var(--border);padding-top:.5rem}.header-nav.open{display:flex}.header-nav>.nav-item,.dropdown-toggle{width:100%;justify-content:space-between;padding:.8rem .25rem;font-size:1rem;text-align:left;border-bottom:1px solid rgba(51,65,85,.5)}.dropdown-menu{position:static;box-shadow:none;border:none;margin:0 0 .5rem;background:var(--bg-card);animation:none}.dropdown-menu:before{display:none}.dropdown-menu a{padding:.7rem 1.25rem}}:root{--bg-base: #0f172a;--bg-surface: #1e293b;--bg-elevated: #243044;--bg-card: #1a2640;--blue-primary: #3b82f6;--blue-bright: #60a5fa;--blue-light: #93c5fd;--blue-muted: #1d4ed8;--blue-glow: rgba(59, 130, 246, .35);--accent-cyan: #22d3ee;--accent-teal: #2dd4bf;--accent-indigo: #818cf8;--text-primary: #e2e8f0;--text-secondary: #94a3b8;--text-muted: #64748b;--text-code: #7dd3fc;--success: #34d399;--warning: #fbbf24;--danger: #f87171;--border: #334155;--border-bright: #475569;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 20px;--radius-full: 999px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 6px 20px rgba(0, 0, 0, .4);--shadow-lg: 0 16px 40px rgba(0, 0, 0, .5);--shadow-glow: 0 0 20px rgba(59, 130, 246, .3)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background-color:var(--bg-base);color:var(--text-primary);line-height:1.6}.app-container{display:flex;flex-direction:column;min-height:100vh;padding:1.5rem 2rem;position:relative}.app-container{display:flex;flex-direction:column;min-height:100vh;position:relative;padding:0}.main-content{display:flex;justify-content:center;align-items:flex-start;flex-grow:1;padding:2rem}.main-content>*{min-width:0;max-width:100%}@media (max-width: 768px){.main-content{padding:1rem}}@media (max-width: 480px){.main-content{padding:.75rem .5rem}}:focus-visible{outline:2px solid var(--blue-bright);outline-offset:2px}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.algo-container{display:flex;flex-direction:column;align-items:center;background:var(--bg-surface);padding:2rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);border:1px solid var(--border);width:100%}.algo-container h2{font-size:1.7rem;font-weight:700;color:var(--blue-bright);margin-bottom:1.5rem;letter-spacing:-.01em}.instruction-box{background-color:var(--bg-elevated);border-left:4px solid var(--blue-primary);padding:1rem 1.25rem;margin-top:1.25rem;border-radius:var(--radius-sm);width:100%;max-width:750px;min-height:80px;display:flex;align-items:flex-start;font-size:1rem;line-height:1.6;text-align:left;color:var(--text-primary)}.sort-page-container{width:100%;max-width:1100px;display:flex;flex-direction:column;gap:0}.sort-btn{margin-top:2rem;padding:.75rem 1.75rem;font-size:1rem;background:linear-gradient(135deg,var(--blue-primary),var(--blue-muted));color:#fff;border:none;border-radius:var(--radius-md);cursor:pointer;font-weight:700;transition:all .25s;box-shadow:var(--shadow-glow)}.sort-btn:hover:not(:disabled){background:linear-gradient(135deg,var(--blue-bright),var(--blue-primary));transform:translateY(-2px);box-shadow:0 0 28px #3b82f680}.sort-btn:disabled{opacity:.45;cursor:not-allowed}.code-tabs-container{width:100%}.tabs-header{display:flex;gap:6px;margin-bottom:0;flex-wrap:wrap}.tab-btn{padding:.55rem 1.1rem;background-color:var(--bg-elevated);color:var(--text-secondary);border:1px solid var(--border);border-radius:var(--radius-sm) var(--radius-sm) 0 0;border-bottom:none;cursor:pointer;font-weight:600;font-size:.9rem;transition:all .2s}.tab-btn:hover{background-color:var(--bg-card);color:var(--blue-light)}.tab-btn.active{background-color:var(--bg-base);color:var(--blue-bright);border-color:var(--blue-primary);border-bottom:2px solid var(--blue-primary)}.controls-container{display:flex;gap:10px;margin-top:1.5rem;justify-content:center;align-items:center;width:100%;flex-wrap:wrap}.control-btn{padding:.55rem 1.1rem;font-size:.95rem;background-color:var(--bg-elevated);color:var(--text-primary);border:1px solid var(--border);border-radius:var(--radius-md);cursor:pointer;font-weight:600;transition:all .2s}.control-btn:hover:not(:disabled){background-color:var(--bg-card);border-color:var(--blue-primary);color:var(--blue-light)}.control-btn:disabled{opacity:.4;cursor:not-allowed}.play-btn{background:linear-gradient(135deg,var(--blue-primary),var(--blue-muted));color:#fff;border:none;font-size:1rem;padding:.65rem 1.5rem;box-shadow:0 0 14px #3b82f666}.play-btn:hover:not(:disabled){background:linear-gradient(135deg,var(--blue-bright),var(--blue-primary));box-shadow:0 0 22px #3b82f699}.speed-control{display:flex;align-items:center;gap:8px;background-color:var(--bg-elevated);padding:.5rem .9rem;border-radius:var(--radius-md);border:1px solid var(--border)}.speed-control label{color:var(--text-secondary);font-weight:600;font-size:.9rem}.speed-control select{background-color:var(--bg-base);color:var(--text-primary);border:1px solid var(--border);padding:3px 8px;border-radius:var(--radius-sm);outline:none;cursor:pointer;font-size:.9rem}.speed-control select:hover{border-color:var(--blue-primary)}.details-container{width:100%}.details-section{background:var(--bg-elevated);border-radius:var(--radius-lg);padding:1.75rem;margin-bottom:1.5rem;border:1px solid var(--border)}.details-section h2{font-size:1.4rem;font-weight:700;color:var(--blue-bright);margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid var(--border)}.details-section ul{text-align:left;line-height:1.85;padding-left:1.2rem}.details-section li{margin-bottom:.4rem;color:var(--text-secondary)}.details-section li strong{color:var(--text-primary)}.details-section p{color:var(--text-secondary);line-height:1.75}.details-section table{width:100%;border-collapse:collapse;margin-top:1rem;text-align:left;border-radius:var(--radius-md);overflow:hidden}.details-section th,.details-section td{border:1px solid var(--border);padding:.8rem 1rem;color:var(--text-secondary)}.details-section thead th{background-color:var(--bg-card);color:var(--blue-light);font-weight:700}.details-section tbody tr:nth-child(2n) td{background-color:#3b82f60a}.avatar-container{position:fixed;bottom:20px;right:20px;display:flex;align-items:flex-end;gap:15px}.avatar img{border-radius:50%;width:100px;height:100px;border:3px solid var(--blue-primary);box-shadow:var(--shadow-glow)}.voice-caption{background:var(--bg-surface);color:var(--text-primary);padding:10px 14px;border-radius:var(--radius-md);border-bottom-right-radius:0;max-width:240px;border:1px solid var(--border);box-shadow:var(--shadow-sm);font-size:.9rem}@media (max-width: 768px){.app-container,.algo-container{padding:1rem}.controls-container{gap:6px}.control-btn,.play-btn{padding:.5rem .85rem;font-size:.85rem}.speed-control{padding:.4rem .7rem}.avatar-container{bottom:10px;right:10px}.avatar img{width:65px;height:65px}.tabs-header{gap:4px}.tab-btn{padding:.45rem .8rem;font-size:.82rem}.details-section{padding:1.2rem}.details-section table{font-size:.85rem}.details-section th,.details-section td{padding:.55rem .65rem}}@media (max-width: 480px){.controls-container{flex-direction:column;align-items:stretch}.control-btn,.play-btn{width:100%;text-align:center}.speed-control{width:100%;justify-content:center}}.loading-spinner{display:flex;align-items:center;justify-content:center;min-height:50vh;font-size:1.1rem;font-weight:700;color:var(--blue-bright);gap:12px;width:100%}.loading-spinner:before{content:"";width:24px;height:24px;border:3px solid rgba(59,130,246,.15);border-top-color:var(--blue-primary);border-radius:50%;animation:spinnerRotate .8s infinite linear}@keyframes spinnerRotate{to{transform:rotate(360deg)}}.details-section,.complexity-table-wrapper{overflow-x:auto;max-width:100%;-webkit-overflow-scrolling:touch}.not-found{display:flex;flex-direction:column;align-items:center;gap:1rem;padding:4rem 1rem;text-align:center}.not-found h1{font-size:4rem;color:var(--blue-bright)}.not-found p{color:var(--text-secondary)}.not-found a{text-decoration:none}