.input-group {
    margin-bottom: 25px;
}

input {
    width: 100%;
    padding: 16px 20px;
    background: rgba(30, 0, 50, 0.65);
    border: 2px solid rgba(0, 175, 255, 0.3);
    border-radius: 12px;
    color: #e1e8ff;
    font-size: 16px;
    transition: 0.3s ease;
    outline: none;
}

input:focus {
    border-color: #00eaff;
    box-shadow: 0 0 20px #00cfff;
}

input::placeholder {
    color: rgba(200, 200, 255, 0.5);
}

.btn {
    width: 100%;
    padding: 15px;
    margin-top: 10px;
    background: linear-gradient(90deg, #00eaff, #ff00ff);
    border: none;
    border-radius: 12px;
    color: #fff;
    font-weight: bold;
    text-transform: uppercase;
    font-size: 18px;
    letter-spacing: 2px;
    cursor: pointer;
    box-shadow: 0 5px 25px rgba(0, 217, 255, 0.4);
    transition: all 0.25s ease;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 8px 35px rgba(0, 217, 255, 0.7),
        0 0 20px rgba(255, 0, 255, 0.6);
}

.btn:active {
    transform: translateY(0);
}

.register-link {
    text-align: center;
    margin-top: 25px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px;
}

.register-link a {
    color: #00eaff;
    font-weight: bold;
    text-decoration: none;
    transition: 0.3s ease;
}

.register-link a:hover {
    color: #ff00ff;
    text-shadow: 0 0 10px #00ddff;
}