body,html{margin:0;padding:0;font-family:Inter,Segoe UI,sans-serif;background:#000;color:#f5f5f5;min-height:100vh;overflow-x:hidden}body{background-color:#000;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 0),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 0);background-size:50px 50px;animation:moveGrid 15s linear infinite}@keyframes moveGrid{0%{background-position:0 0}to{background-position:50px 50px}}.container{max-width:1200px;margin:0 auto;padding:2rem}header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem;position:relative;z-index:50}header .logo{font-size:1.6rem;font-weight:800;color:#fff}header button{padding:.8rem 1.4rem;border:none;border-radius:10px;cursor:pointer;font-weight:700;font-size:1rem;background:linear-gradient(135deg,#8b5cf6,#6366f1);color:#fff;transition:transform .2s,box-shadow .3s}header button:hover{transform:scale(1.05);box-shadow:0 0 20px rgba(139,92,246,.6)}.hero{display:flex;justify-content:space-between;align-items:center;margin-top:2rem;gap:3rem;flex-wrap:wrap}.hero-text{flex:1 1;min-width:280px}.hero-text h1{font-size:3.5rem;font-weight:900;line-height:1.2}.hero-text .highlight{color:#8b5cf6}.hero-text p{margin-top:1rem;font-size:1.2rem;color:#aaa}.hero-text button{margin-top:2rem;padding:1rem 2rem;font-size:1.1rem;border-radius:12px;border:none;cursor:pointer;background:linear-gradient(135deg,#8b5cf6,#6366f1);color:#fff;font-weight:700;transition:transform .2s,box-shadow .3s}.hero-text button:hover{transform:scale(1.05);box-shadow:0 0 25px rgba(139,92,246,.6)}.hero-card{flex:1 1;min-width:280px;background:#111;border-radius:20px;padding:2rem;box-shadow:0 0 25px rgba(139,92,246,.2);max-height:400px;overflow-y:auto;gap:2rem}.hero-card::-webkit-scrollbar{width:0}.hero-card h3{margin-bottom:1rem;color:#8b5cf6}.history-item{background:#1f1f1f;padding:1rem;border-radius:12px;margin-bottom:1rem}.demo-section{margin-top:2rem}.demo-section h4{color:#22c55e;margin-bottom:.5rem}.demo-section input{width:70%;padding:.8rem;border-radius:10px;border:none;background:#1a1a1a;color:#fff;margin-bottom:1rem}.demo-section button{padding:.8rem 1.4rem;border:none;border-radius:10px;background:linear-gradient(135deg,#22c55e,#16a34a);color:white;font-weight:700;cursor:pointer}.demo-section button:hover{box-shadow:0 0 15px rgba(34,197,94,.6)}.result-text{margin-top:1rem;font-weight:700;font-size:1.1rem;color:#facc15}.modal{position:fixed;top:0;left:0;width:100vw;height:100vh;background:rgba(0,0,0,.8);display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:#111;padding:2rem;border-radius:15px;text-align:center;width:350px;box-shadow:0 0 30px rgba(139,92,246,.3)}.modal-content h3{margin-bottom:1rem;color:#8b5cf6}.modal-content input{width:90%;padding:.8rem;border-radius:10px;border:none;background:#1a1a1a;color:#fff;margin-bottom:1rem}.modal-buttons{display:flex;justify-content:center;gap:1rem}.submit-btn{background:linear-gradient(135deg,#8b5cf6,#6366f1);color:white;padding:.8rem 1.4rem;border:none;border-radius:10px;font-weight:700;cursor:pointer;transition:transform .2s}.submit-btn:hover{transform:scale(1.05)}.cancel-btn{background:#333;color:white;padding:.8rem 1.4rem;border:none;border-radius:10px;font-weight:700;cursor:pointer}.cancel-btn:hover{background:#555}.popup{position:fixed;bottom:20px;right:20px;padding:1rem 1.5rem;border-radius:12px;color:#fff;font-weight:700;box-shadow:0 0 20px rgba(0,0,0,.5);animation:fadeInOut 3s ease forwards;z-index:10000}.success-popup{background:linear-gradient(135deg,#22c55e,#16a34a);box-shadow:0 0 20px rgba(34,197,94,.7)}.error-popup{background:linear-gradient(135deg,#ef4444,#b91c1c);box-shadow:0 0 20px rgba(239,68,68,.7)}@keyframes fadeInOut{0%{opacity:0;transform:translateY(20px)}20%{opacity:1;transform:translateY(0)}80%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(20px)}}footer{text-align:center;margin-top:3rem;font-size:1rem;color:#aaa}@media (max-width:1024px){.hero{gap:2rem}}@media (max-width:768px){.hero{flex-direction:column;align-items:flex-start}.hero-text h1{font-size:5.8rem}.hero-text p{font-size:.8rem}.hero-card{margin-top:1rem;width:30%;max-height:200px}.demo-section input{width:50%}}@media (max-width:480px){header{position:-webkit-sticky;position:sticky;top:0;left:0;width:100%;padding:0;background:rgba(0,0,0,.9);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:flex;justify-content:space-between;align-items:center;flex-wrap:nowrap}header .logo{font-size:1.2rem;margin-left:0;padding-left:2rem}header button{font-size:.6rem;padding:.5rem 2rem;border-radius:6px;margin-right:0}.hero-text h1{font-size:3rem}.hero-text button{width:50%;text-align:center}.hero-card{padding:1rem;max-height:300px}.demo-section input{width:80%}.demo-section button{width:50%}body{background-size:35px 35px;animation:moveGrid 12s linear infinite}}