:root{--primary:#4d8ee8;--primary-light:#6ba3ff;--primary-dark:#2a5cb5;--secondary:#7a4ced;--dark:#0f0f15;--darker:#08080d;--light:#f0f4f8;--gray:#252535;--light-gray:#3a3a4a;--transition:all .4s cubic-bezier(.175, .885, .32, 1.275)}*{box-sizing:border-box;scrollbar-width:none;margin:0;padding:0}body{background-color:var(--dark);color:var(--light);font-family:Poppins,sans-serif;line-height:1.6;overflow-x:hidden}.welcome-overlay{background-color:var(--darker);z-index:9999;opacity:1;justify-content:center;align-items:center;width:100%;height:100%;transition:opacity .8s ease-out;display:flex;position:fixed;top:0;left:0}.welcome-overlay.fade-out{opacity:0;pointer-events:none}.welcome-container{align-items:center;display:flex}.welcome-text{color:var(--primary);text-shadow:0 0 20px #5b9af4fe;font-family:JetBrains Mono,monospace;font-size:100px;font-weight:600}.cursor{color:var(--primary);margin-left:4px;font-size:80px;animation:.7s infinite blink}@keyframes 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h2{color:var(--primary);align-items:center;gap:10px;margin-bottom:1.5rem;font-size:1.5rem;display:flex}.achievements h2:before{content:"";background:var(--primary);flex-shrink:0;width:30px;height:2px;display:block}.achievement-item{transition:var(--transition);border-left:3px solid #0000;border-radius:8px;align-items:flex-start;margin:1.5rem 0;padding:1rem;display:flex;position:relative;overflow:hidden}.achievement-item:before{content:"";background:linear-gradient(90deg,#0000,#4d8ee80d,#0000);width:100%;height:100%;transition:left .6s;position:absolute;top:0;left:-100%}.achievement-item:hover:before{left:100%}.achievement-item:hover{border-left-color:var(--primary);background-color:#4d8ee814;transform:translate(10px)scale(1.01);box-shadow:0 5px 20px #4d8ee826}.achievement-icon{min-width:30px;color:var(--primary);flex-shrink:0;margin-top:3px;margin-right:15px;font-size:1.5rem;transition:all .3s}.achievement-item:hover 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#4d8ee866}.notes-categories{flex-wrap:wrap;gap:10px;max-width:1200px;margin-bottom:2rem;margin-left:auto;margin-right:auto;display:flex}.category-btn{background-color:var(--gray);color:var(--light);cursor:pointer;transition:var(--transition);border:none;border-radius:30px;padding:.6rem 1.2rem;font-family:Poppins,sans-serif;font-size:.9rem}.category-btn.active,.category-btn:hover{background-color:var(--primary);color:var(--dark);transform:translateY(-2px)scale(1.05);box-shadow:0 5px 15px #4d8ee866}.notes-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem;max-width:1200px;margin:0 auto;display:grid}.note-card{background-color:var(--darker);border:1px solid var(--gray);transition:var(--transition);border-radius:12px;flex-direction:column;padding:1.8rem;display:flex;position:relative}.note-card:after{content:"";background:linear-gradient(90deg, var(--primary), var(--secondary));height:3px;transition:transform 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var(--gray);padding:2rem}.footer-text{color:#f0f4f8cc;font-size:.9rem}.loading-spinner{justify-content:center;align-items:center;min-height:200px;display:flex}.spinner{border:3px solid var(--gray);border-top-color:var(--primary);border-radius:50%;width:40px;height:40px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.admin-login-page{background:var(--dark);justify-content:center;align-items:center;min-height:100vh;padding:2rem;display:flex}.admin-login-card{background:var(--darker);border:1px solid var(--gray);border-radius:16px;width:100%;max-width:420px;padding:2.5rem;box-shadow:0 20px 60px #00000080}.admin-login-card h1{text-align:center;color:var(--primary);margin-bottom:.5rem;font-size:1.8rem}.admin-login-card p{text-align:center;color:#f0f4f899;margin-bottom:2rem;font-size:.9rem}.form-group{margin-bottom:1.2rem}.form-group label{color:var(--light);margin-bottom:.4rem;font-size:.9rem;font-weight:500;display:block}.form-group input,.form-group textarea,.form-group select{background:var(--gray);border:1px solid var(--light-gray);width:100%;color:var(--light);border-radius:8px;outline:none;padding:.7rem 1rem;font-family:Poppins,sans-serif;font-size:.95rem;transition:border-color .3s}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--primary);box-shadow:0 0 0 3px #4d8ee826}.form-group textarea{resize:vertical;min-height:100px}.form-group select{cursor:pointer}.btn-primary{background:var(--primary);color:#fff;cursor:pointer;white-space:nowrap;border:none;border-radius:8px;align-items:center;gap:7px;padding:.55rem 1.2rem;font-family:Poppins,sans-serif;font-size:.88rem;font-weight:600;transition:background .2s,transform .2s,box-shadow .2s;display:inline-flex}.btn-primary:hover:not(:disabled){background:var(--primary-light);transform:translateY(-1px);box-shadow:0 6px 18px #4d8ee866}.btn-primary:disabled{opacity:.55;cursor:not-allowed}.btn-secondary{color:#f0f4f8bf;cursor:pointer;white-space:nowrap;background:#ffffff0f;border:1px solid #ffffff1f;border-radius:8px;align-items:center;gap:7px;padding:.55rem 1.2rem;font-family:Poppins,sans-serif;font-size:.88rem;font-weight:500;transition:background .2s,color .2s,border-color .2s;display:inline-flex}.btn-secondary:hover:not(:disabled){color:var(--light);background:#ffffff1c;border-color:#ffffff38}.btn-secondary:disabled{opacity:.5;cursor:not-allowed}.btn-danger{color:#fca5a5;cursor:pointer;white-space:nowrap;background:#ff6b6b24;border:1px solid #ff6b6b59;border-radius:8px;align-items:center;gap:7px;padding:.55rem 1.2rem;font-family:Poppins,sans-serif;font-size:.88rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-danger:hover:not(:disabled){background:#ff6b6b47}.btn-danger:disabled{opacity:.5;cursor:not-allowed}.btn-primary-full{background:var(--primary);width:100%;color:var(--dark);cursor:pointer;transition:var(--transition);border:none;border-radius:8px;padding:.85rem;font-family:Poppins,sans-serif;font-size:1rem;font-weight:600}.btn-primary-full:hover{background:var(--primary-light);transform:translateY(-2px);box-shadow:0 8px 20px #4d8ee866}.btn-primary-full:disabled{opacity:.6;cursor:not-allowed;transform:none}.error-msg{color:#ff6b6b;text-align:center;margin-top:.4rem;margin-bottom:1rem;font-size:.85rem}.success-msg{color:#51cf66;text-align:center;margin-top:.4rem;font-size:.85rem}.admin-layout{background:var(--dark);min-height:100vh;display:flex}.admin-sidebar{background:var(--darker);border-right:1px solid var(--gray);z-index:100;flex-shrink:0;width:260px;height:100vh;padding:0;position:fixed;top:0;left:0;overflow-y:auto}.admin-sidebar-header{border-bottom:1px solid var(--gray);background:linear-gradient(135deg,#4d8ee833,#7a4ced1a);padding:1.5rem}.admin-sidebar-header h2{color:var(--primary);margin-bottom:.2rem;font-size:1.1rem}.admin-sidebar-header p{color:#f0f4f880;font-size:.75rem}.admin-nav{padding:1rem 0}.admin-nav-link{color:#f0f4f8b3;cursor:pointer;border-left:3px solid #0000;align-items:center;gap:10px;padding:.8rem 1.5rem;font-size:.9rem;text-decoration:none;transition:all .3s;display:flex}.admin-nav-link:hover,.admin-nav-link.active{color:var(--primary-light);border-left-color:var(--primary);background:#4d8ee81a}.admin-nav-link i{text-align:center;width:20px}.admin-content{flex:1;min-height:100vh;margin-left:260px;padding:2rem}.admin-topbar{border-bottom:1px solid 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