/* default layout */
body {
    margin: 0;
    height: 100%;
    min-width: 600px;
    min-height: 400px;
}

h1, h2, h3 {
    margin: 0;
    padding: 0;
    display: inline-block;
}

.main {
    height: 100%;
    width: 100%;
    min-width: 850px;
    min-height: 590px;
    position: absolute;
}

.default-button {
    padding: 0 24px;
    width: 126px;
    height: 34px;
}

/* header layout */
.header {
    left: 0;
    top: 0;
    width: 100%;
    height: 50px;
    position: absolute;
}

/* default style */
body {
    overflow: hidden;
}

h1, h2, h3 {
    font-family: Helvetica, Arial, sans-serif;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.2px;
    color: #fff;
}

h3 {
    font-weight: 100;
    letter-spacing: 0;
}

button {
    outline: none;
    cursor: pointer;
}

.default-button {
    font-family: Helvetica, Arial, sans-serif;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.2px;
    color: #fff;
    border: none;
    border-radius: 3px;
    background-color: #4e4e4e;
}

.default-button:hover {
    background-color: #737373;
}

.default-button.disabled {
    opacity: 0.3;
    cursor: not-allowed;
    background-color: #4e4e4e;
}