.App{min-height:100vh}main{padding-top:2rem;padding-bottom:5rem}.hero{text-align:center;padding:6rem 0;animation:heroFade 1s ease}.hero h1{font-size:4.5rem;font-weight:800;margin-bottom:1rem;background:linear-gradient(135deg,#38bdf8,#818cf8,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero p{color:#cbd5e1;font-size:1.2rem;max-width:700px;margin:auto;line-height:1.8}@keyframes heroFade{0%{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}.auth-container{min-height:80vh;display:flex;justify-content:center;align-items:center}.auth-card{width:100%;max-width:450px;padding:2.5rem;border-radius:24px;background:rgba(255,255,255,.08);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border:1px solid rgba(255,255,255,.08);box-shadow:0 20px 40px #00000040;animation:authSlide .8s ease}.auth-card h2{text-align:center;color:#fff;margin-bottom:2rem;font-size:2rem}@keyframes authSlide{0%{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}.dashboard-header{text-align:center;margin-bottom:3rem}.dashboard-header h1{font-size:3rem;color:#fff}.dashboard-header p{color:#cbd5e1;margin-top:.5rem}.section-title{color:#fff;font-size:2rem;margin-bottom:1.5rem;position:relative}.section-title:after{content:"";position:absolute;left:0;bottom:-8px;width:80px;height:4px;border-radius:50px;background:linear-gradient(90deg,#38bdf8,#818cf8)}.notes-section{margin-top:2rem}.note-card{padding:1.5rem;display:flex;flex-direction:column;height:100%;animation:cardEnter .6s ease}.note-card:hover{transform:translateY(-6px)}.note-header{display:flex;align-items:flex-start;margin-bottom:1rem}.note-title{font-size:1.3rem;font-weight:700;color:#fff;margin-bottom:.5rem}.note-topic{display:inline-block;background:linear-gradient(135deg,#06b6d4,#2563eb);color:#fff;padding:.35rem .9rem;border-radius:50px;font-size:.75rem;font-weight:600}.note-description{color:#cbd5e1;line-height:1.7;margin-top:1rem;flex-grow:1}.note-footer{margin-top:auto;display:flex;justify-content:space-between;align-items:center}.note-actions{display:flex;gap:.6rem}.note-meta{color:#94a3b8;font-size:.8rem}@keyframes cardEnter{0%{opacity:0;transform:translateY(25px)}to{opacity:1;transform:translateY(0)}}.admin-form{padding:2rem;border-radius:20px;background:rgba(255,255,255,.08);-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);border:1px solid rgba(255,255,255,.08);margin-bottom:2rem}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.alert{padding:1rem 1.2rem;border-radius:14px;margin-bottom:1rem;animation:alertSlide .4s ease}.alert-success{background:rgba(34,197,94,.15);border:1px solid rgba(34,197,94,.35);color:#4ade80}.alert-error{background:rgba(239,68,68,.15);border:1px solid rgba(239,68,68,.35);color:#f87171}.alert-info{background:rgba(56,189,248,.15);border:1px solid rgba(56,189,248,.35);color:#7dd3fc}@keyframes alertSlide{0%{opacity:0;transform:translateY(-15px)}to{opacity:1;transform:translateY(0)}}.file-upload{border:2px dashed rgba(56,189,248,.4);border-radius:18px;padding:3rem;text-align:center;cursor:pointer;background:rgba(255,255,255,.04);transition:.35s}.file-upload:hover{background:rgba(56,189,248,.08);border-color:#38bdf8;transform:scale(1.02)}.file-upload.dragover{background:rgba(56,189,248,.12);border-color:#38bdf8}.file-input{display:none}.upload-icon{font-size:4rem;margin-bottom:1rem;color:#38bdf8;animation:floatIcon 2s infinite ease-in-out}@keyframes floatIcon{50%{transform:translateY(-10px)}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.75);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;justify-content:center;align-items:center;z-index:999;padding:1rem}.modal-content{width:100%;max-width:600px;background:#0f172a;border:1px solid rgba(255,255,255,.08);border-radius:24px;padding:2rem;animation:modalOpen .35s ease}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.modal-title{color:#fff;font-size:1.6rem;font-weight:700}.modal-close{border:none;background:transparent;color:#fff;font-size:1.8rem;cursor:pointer}.modal-close:hover{color:#38bdf8}@keyframes modalOpen{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}@media (max-width: 768px){.hero h1{font-size:3rem}.dashboard-header h1{font-size:2.2rem}.form-row{grid-template-columns:1fr}.note-footer{flex-direction:column;gap:1rem;align-items:flex-start}.auth-card{padding:1.8rem}}.alert{padding:12px;border-radius:10px;margin-bottom:15px;font-weight:600}.alert-success{background:rgba(34,197,94,.15);color:#22c55e;border:1px solid rgba(34,197,94,.3)}.alert-error{background:rgba(239,68,68,.15);color:#ef4444;border:1px solid rgba(239,68,68,.3)}*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #38bdf8;--secondary: #818cf8;--dark: #0f172a;--dark-light: #1e293b;--card-bg: rgba(255, 255, 255, .08);--white: #ffffff;--text: #e2e8f0;--success: #22c55e;--danger: #ef4444;--warning: #f59e0b}html{scroll-behavior:smooth}body{font-family:Inter,Segoe UI,sans-serif;background:linear-gradient(135deg,#020617 0%,#0f172a 30%,#1e293b 70%,#0369a1 100%);color:var(--text);min-height:100vh;overflow-x:hidden;animation:fadeIn .8s ease}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;background:radial-gradient(circle at 20% 20%,rgba(56,189,248,.18),transparent 25%),radial-gradient(circle at 80% 80%,rgba(129,140,248,.18),transparent 25%);z-index:-2;animation:floatingBg 15s ease-in-out infinite alternate}@keyframes floatingBg{0%{transform:translateY(0)}to{transform:translateY(-40px)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.container{max-width:1250px;margin:auto;padding:0 24px}.navbar{position:sticky;top:0;z-index:1000;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:rgba(15,23,42,.75);border-bottom:1px solid rgba(255,255,255,.08);animation:slideDown .7s ease}.nav-content{display:flex;justify-content:space-between;align-items:center;padding:18px 0}.nav-brand{text-decoration:none;font-size:1.7rem;font-weight:800;color:var(--primary);letter-spacing:1px}.nav-links{display:flex;align-items:center;gap:2rem}.nav-link{text-decoration:none;color:var(--text);font-weight:600;position:relative;transition:.3s}.nav-link:after{content:"";position:absolute;bottom:-5px;left:0;width:0%;height:2px;background:var(--primary);transition:.3s}.nav-link:hover{color:var(--primary)}.nav-link:hover:after{width:100%}@keyframes slideDown{0%{transform:translateY(-80px);opacity:0}to{transform:translateY(0);opacity:1}}.card{background:var(--card-bg);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.08);border-radius:20px;transition:.4s;overflow:hidden;box-shadow:0 10px 30px #0003,0 0 20px #38bdf80d}.card:hover{transform:translateY(-10px) scale(1.02);box-shadow:0 20px 50px #00000059,0 0 30px #38bdf833}.btn{border:none;cursor:pointer;border-radius:12px;padding:12px 24px;font-weight:700;transition:.3s;position:relative;overflow:hidden}.btn-primary{background:linear-gradient(135deg,#06b6d4,#2563eb);color:#fff}.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 30px #2563eb80}.btn-secondary{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.1)}.btn-secondary:hover{background:rgba(255,255,255,.15)}.btn-danger{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff}.btn-danger:hover{transform:translateY(-3px)}.btn:before{content:"";position:absolute;top:0;left:-120%;width:100%;height:100%;background:linear-gradient(120deg,transparent,rgba(255,255,255,.3),transparent);transition:.6s}.btn:hover:before{left:120%}.form-group{margin-bottom:20px}.form-label{display:block;margin-bottom:8px;color:#cbd5e1;font-weight:600}.form-input{width:100%;padding:14px;border-radius:12px;border:1px solid rgba(255,255,255,.1);background:rgba(255,255,255,.06);color:#fff;transition:.3s}.category-select,.category-select option{background-color:#2d3748;color:#fff}.form-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px #38bdf833}.notes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:2rem;padding:2rem 0}.loading{display:flex;justify-content:center;align-items:center;min-height:250px}.spinner{width:55px;height:55px;border:5px solid rgba(255,255,255,.15);border-top:5px solid var(--primary);border-radius:50%;animation:spin 1s linear infinite;box-shadow:0 0 20px #38bdf866}@keyframes spin{to{transform:rotate(360deg)}}.file-icon{width:55px;height:55px;border-radius:14px;display:flex;align-items:center;justify-content:center;animation:pulse 3s infinite}.file-icon.pdf{background:rgba(239,68,68,.15);color:#ef4444}.file-icon.image{background:rgba(56,189,248,.15);color:#38bdf8}.file-icon.document{background:rgba(34,197,94,.15);color:#22c55e}.file-icon.spreadsheet{background:rgba(245,158,11,.15);color:#f59e0b}.file-icon.text{background:rgba(168,85,247,.15);color:#a855f7}@keyframes pulse{50%{transform:scale(1.08)}}@media (max-width:768px){.nav-content{flex-direction:column;gap:1rem}.notes-grid{grid-template-columns:1fr}.container{padding:0 16px}}