:root{--primary: #4f46e5;--primary-hover: #4338ca;--secondary: #10b981;--accent: #f59e0b;--danger: #ef4444;--bg-dark: #020617;--card-bg: rgba(15, 23, 42, .8);--text-primary: #f8fafc;--text-secondary: #94a3b8;--glass-border: rgba(255, 255, 255, .08);--google-gradient: linear-gradient(135deg, #4285f4 0%, #34a853 33%, #fbbc05 66%, #ea4335 100%);--premium-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);--sidebar-width: 280px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Plus Jakarta Sans,sans-serif;background-color:var(--bg-dark);color:var(--text-primary);min-height:100vh;overflow-x:hidden}h1,h2,h3{font-family:Outfit,sans-serif}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);background:rgba(15,23,42,.9);border-right:1px solid var(--glass-border);padding:2rem 1.5rem;display:flex;flex-direction:column;position:fixed;height:100vh;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);z-index:100}.sidebar-brand{display:flex;align-items:center;gap:.75rem;font-size:1.25rem;font-weight:700;margin-bottom:3rem;color:#fff}.brand-dot{width:12px;height:12px;background:var(--google-gradient);border-radius:50%}.sidebar-nav{display:flex;flex-direction:column;gap:.5rem;margin-bottom:3rem}.nav-item{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;border-radius:12px;background:transparent;border:none;color:var(--text-secondary);cursor:pointer;transition:all .2s ease;width:100%;text-align:left}.nav-item:hover{background:rgba(255,255,255,.05);color:#fff}.nav-item.active{background:rgba(79,70,229,.15);color:var(--primary);border-left:3px solid var(--primary)}.sidebar-divider{font-size:.7rem;text-transform:uppercase;letter-spacing:1px;color:var(--text-secondary);margin-bottom:1rem;padding-left:1rem}.sidebar-recent{display:flex;flex-direction:column;gap:.25rem}.recent-nb-item{display:flex;align-items:center;gap:.6rem;padding:.5rem 1rem;border-radius:8px;font-size:.85rem;color:var(--text-secondary);cursor:pointer;transition:all .2s ease}.recent-nb-item:hover{background:rgba(255,255,255,.03);color:#fff}.recent-dot{width:6px;height:6px;background:var(--text-secondary);border-radius:50%}.sidebar-footer{margin-top:auto;padding-top:2rem}.user-profile{display:flex;align-items:center;gap:.75rem;padding:.75rem;background:rgba(255,255,255,.03);border-radius:16px}.avatar{width:36px;height:36px;background:var(--primary);border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.8rem}.user-info{display:flex;flex-direction:column}.user-name{font-size:.85rem;font-weight:600;color:#fff}.user-role{font-size:.7rem;color:var(--text-secondary)}.main-content{margin-left:var(--sidebar-width);flex:1;padding:2rem 3rem;max-width:1400px}header{display:flex;justify-content:space-between;align-items:center;gap:1.5rem;margin-bottom:3rem;padding-bottom:2rem;border-bottom:1px solid var(--glass-border);flex-wrap:wrap}.logo-section h1{font-size:2.5rem;font-weight:800;background:var(--google-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-1px}.search-bar{position:relative;width:450px}.sort-bar{margin-left:auto}.sort-bar select{min-width:220px;padding:.85rem 1rem;background:var(--card-bg);border:1px solid var(--glass-border);border-radius:16px;color:#fff;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);font-size:.95rem}.sort-bar select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px #4f46e51a}.search-bar input{width:100%;padding:.85rem 1rem .85rem 3.5rem;background:var(--card-bg);border:1px solid var(--glass-border);border-radius:16px;color:#fff;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .3s cubic-bezier(.4,0,.2,1);font-size:1rem}.search-bar input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px #4f46e51a;background:rgba(15,23,42,.95)}.search-icon{position:absolute;left:1.25rem;top:50%;transform:translateY(-50%);color:var(--text-secondary)}.notebook-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:2.5rem}.notebook-card{background:var(--card-bg);border:1px solid var(--glass-border);border-radius:28px;padding:2rem;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .5s cubic-bezier(.19,1,.22,1);cursor:pointer;display:flex;flex-direction:column;position:relative;overflow:hidden}.notebook-card:hover{transform:translateY(-12px) scale(1.02);border-color:#fff3;box-shadow:0 30px 60px #0006}.notebook-card:before{content:"";position:absolute;top:0;left:0;width:100%;height:6px;background:var(--google-gradient);opacity:0;transition:opacity .3s ease}.notebook-card:hover:before{opacity:1}.card-icon{width:56px;height:56px;background:rgba(79,70,229,.1);border-radius:16px;display:flex;align-items:center;justify-content:center;margin-bottom:1.5rem;color:var(--primary);transition:all .3s ease}.notebook-card:hover .card-icon{transform:rotate(-5deg) scale(1.1);background:rgba(79,70,229,.2)}.card-title{font-size:1.5rem;font-weight:700;margin-bottom:1rem;color:var(--text-primary);letter-spacing:-.02em}.card-summary{font-size:.95rem;color:var(--text-secondary);line-height:1.7;margin-bottom:2rem;display:-webkit-box;-webkit-line-clamp:3;line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.card-footer{margin-top:auto;display:flex;justify-content:space-between;align-items:center}.source-count{display:flex;align-items:center;gap:.5rem;background:rgba(255,255,255,.05);padding:.5rem 1rem;border-radius:20px;font-size:.85rem;font-weight:500}.open-btn{background:white;color:#000;padding:.65rem 1.5rem;border-radius:14px;font-weight:700;font-size:.9rem;text-decoration:none;transition:all .3s cubic-bezier(.175,.885,.32,1.275)}.open-btn:hover{background:#f8fafc;transform:scale(1.05);box-shadow:0 10px 20px #0000001a}.brain-guide-container{background:var(--card-bg);border:1px solid var(--glass-border);border-radius:32px;padding:3rem;max-width:900px;margin:0 auto}.guide-header{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem}.guide-header h2{font-size:2.25rem;font-weight:800;letter-spacing:-.03em}.guide-intro{font-size:1.1rem;color:var(--text-secondary);line-height:1.8;margin-bottom:3rem;max-width:700px}.guide-list{display:flex;flex-direction:column;gap:2rem}.guide-item{padding-bottom:2rem;border-bottom:1px solid var(--glass-border)}.guide-item:last-child{border-bottom:none}.guide-item-title{display:flex;align-items:center;gap:.75rem;margin-bottom:.75rem}.guide-item-title h3{font-size:1.25rem;font-weight:700;color:#fff}.guide-item-summary{color:var(--text-secondary);line-height:1.7;margin-bottom:1rem;font-size:.95rem}.guide-item-meta{display:flex;align-items:center;gap:1rem;font-size:.8rem;color:var(--text-secondary);font-weight:500;opacity:.7}.separator{opacity:.3}.guide-footer{margin-top:4rem}.info-box{background:rgba(79,70,229,.1);padding:1.25rem 1.5rem;border-radius:20px;display:flex;align-items:center;gap:1rem;color:var(--primary);font-weight:600;font-size:.9rem;border:1px solid rgba(79,70,229,.2)}.text-accent{color:var(--accent)}.text-primary{color:var(--primary)}.ml-auto{margin-left:auto}.opacity-0{opacity:0}.refresh-container{display:flex;justify-content:center;margin-top:4rem;margin-bottom:2rem}.refresh-btn{background:var(--card-bg);border:1px solid var(--glass-border);color:#fff;padding:1rem 2rem;border-radius:16px;cursor:pointer;display:flex;align-items:center;gap:.75rem;transition:all .4s cubic-bezier(.175,.885,.32,1.275);font-weight:600}.refresh-btn:hover{background:rgba(255,255,255,.05);border-color:var(--primary);transform:translateY(-4px);box-shadow:0 10px 20px #0003}@media (max-width: 1024px){.sidebar{width:80px;padding:2rem 1rem}.sidebar-brand span,.nav-item span,.sidebar-divider,.sidebar-recent,.user-info{display:none}.main-content{margin-left:80px}.search-bar,.sort-bar{width:100%;margin-left:0}.sort-bar select{width:100%}}