body{margin:0;background:radial-gradient(circle at top,#1e1e1e,#0e0e0e);font-family:Inter,sans-serif}.app-container{min-height:100vh;display:flex;justify-content:center;align-items:flex-start;padding-top:40px}.header-container{display:flex;justify-content:flex-end;padding:20px}.input-error{margin-top:1px;font-size:13px;color:#ff4d4f}.card{width:95%;max-width:480px;background:#1a1a1a;padding:20px;border-radius:14px;box-shadow:0 0 20px #0006;border:1px solid #2a2a2a}.title{text-align:center;color:#fff;margin-bottom:20px}.platform-row{display:flex;justify-content:space-between;margin-bottom:20px}.platform-item{width:23.5%;background:#2a2a2a;border:1px solid #333;border-radius:10px;text-align:center;padding:10px 0;cursor:pointer;transition:.2s;color:#bbb;display:flex;flex-direction:column;align-items:center;justify-content:center}.platform-item img{width:46px;height:40px;margin-bottom:2px}.platform-item.active{background:#0074ff;border-color:#58a9ff;color:#fff}.input{width:92%;padding:12px;border-radius:10px;border:1px solid #333;background:#222;color:#fff;font-size:16px;margin-bottom:12px}.btn{width:92%;padding:12px;background:#00c46b;color:#fff;font-size:16px;border:none;border-radius:10px;cursor:pointer;transition:.2s}.input_2{padding:12px;border-radius:8px;border:1px solid #333;background:#1a1a1a;color:#fff}.btn_2{font-size:16px;padding:2px 10px;border-radius:6px;background:#0074ff;border:none;color:#fff;cursor:pointer;margin-bottom:12px}.btn:hover{background:#00a85b}.result-box{margin-top:20px;padding:12px;background:#222;border:1px solid #444;border-radius:10px;color:#fff}.result-box p{word-break:break-all;margin-top:8px;color:#4fc3ff}.auth-container{width:100%;display:flex;justify-content:center;padding-top:60px}.auth-card{width:95%;max-width:420px;background:#1a1a1a;padding:26px;border-radius:14px;border:1px solid #2a2a2a;box-shadow:0 0 18px #0000008c;animation:fadeIn .3s ease}.auth-title{color:#fff;text-align:center;font-size:22px;font-weight:600;margin-bottom:22px}.auth-input{width:92%;padding:12px;border-radius:10px;border:1px solid #333;background:#222;color:#fff;font-size:16px;margin-bottom:14px;transition:.2s}.auth-input:focus{outline:none;border-color:#4fc3ff;box-shadow:0 0 6px #4fc3ff66}.auth-btn{width:92%;padding:12px;border-radius:10px;font-size:16px;font-weight:500;border:none;background:#0074ff;color:#fff;cursor:pointer;transition:.25s}.auth-btn:hover{background:#0063d9}@keyframes fadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}