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HTML 

              
                <section class="section section-form">
    <br />
    <form>
        <h3>Contact Information</h3>
        <div class="input-group error">
            <label for="eamil">Email Address</label>
            <input id="eamil" type="text" placeholder="Input your email address" />
            <div class="message error">
                <i></i>
                <div class="message-content">
                    Useful and easy to understand validation feedback
                </div>
            </div>
        </div>
        <div class="input-group">
            <label for="details">Details</label>
            <textarea id="details" cols="10" placeholder="Input details">Yesterday, at band camp, I noticed that my drive was no longer working as expected.In fact, it was working in a very unexpected way. Can you please make sure it will work as expected again?</textarea>

            <div class="message">
                <i></i>
                <div class="message-content">
                    Information to help the user provide the right input
                </div>
            </div>
        </div>
        <div class="input-group">
            <label>Are you happy?</label>
            <label class="inline-radio" for="yes">
                <input id="yes" type="radio" name="radio" /> Yes
            </label>
            <label class="inline-radio" for="no">
                <input id="no" type="radio" name="radio" /> No
            </label>

        </div>
        <div class="input-group">
            <label>What do you link?</label>
            <label class="inline-checkbox" for="money">
                <input id="money" type="checkbox" /> Money
            </label>
            <label class="inline-checkbox" for="power">
                <input id="power" type="checkbox" /> Power
            </label>
            <label class="inline-checkbox" for="free">
                <input id="free" type="checkbox" /> Free
            </label>
        </div>
        <div class="input-group">
            <label>
                <input type="checkbox" /> I have read and understood the <a href="#">Data Protection act compliance statement</a>
            </label>
        </div>
        <div>
            <input type="submit" class="btn btn-red btn-medium" value="Submit" />
        </div>
    </form>
    
</section>
!

CSS 

              
                body{
  font-size:16px;
}
.section-form {
    max-width: 960px;
    margin:0 auto;
  .btn{
    white-space: nowrap;
    vertical-align: middle;
    text-align: center;
    text-decoration: none;
    line-height: normal;
    color: #fff;
    cursor: pointer;
    user-select: none;
    border: none;
    border-radius: 0;
    transition: background 150ms ease-in;
    background-color: #A20520;
    &:hover{
      background-color: #000;
    }
    &.btn-medium {
    font-size: 1rem;
    padding: .5rem 2rem .6rem;
  }
  }
    .input-group {
        margin-bottom: 1.5rem;

        label {
            color: #282828;
            display: block;
            font-size: 14px;

            &.inline-radio,
            &.inline-checkbox {
                display: inline-block;
                margin-right: 1.5rem;
            }
        }

        input, textarea {
            border: none;
            border-bottom: 1px solid #999;
            line-height: 1.5rem;
            padding-bottom: 0.4rem;

            &:focus {
                outline: none;
            }

            width: 100%;
        }

        textarea {
            display: block;
        }

        input[type=radio], input[type=checkbox] {
            width: auto;
            margin-right: .2rem;
        }
    }

    .message {
        i {
            border-top: 2px solid #fff;
            border-left: 8px solid #fff;
            border-right: 8px solid #fff;
            border-bottom: 8px solid #DFDDDD;
            display: block;
            float: left;
            margin-left: 0.5rem;
        }

        .message-content {
            background-color: #DFDDDD;
            float: none;
            clear: both;
            padding: .5rem;
            font-size: 14px;
        }

        &.error {
            display: none;

            i {
                border-bottom: 8px solid #ca2026;
            }

            .message-content {
                background-color: #ca2026;
                color: #fff;
            }
        }
    }
    /*Validation error*/
    .error {
        label {
            color: #ca2026;
        }

        .message.error {
            display: block;
        }

        input, textarea {
            border-bottom-color: #ca2026;
          color:#ca2026;
        }
    }
}
!

JS
!
999px

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