styles.css

/*
  Remove all the styles of the "User-Agent-Stylesheets", except for the 'display' property
  - The "symbol *" part is to solve Firefox SVG sprite bug
*/

*:where(:not(iframe, canvas, img, svg, video):not(svg *, symbol *)) {
    all: unset;
    display: revert;
}


/* Preferred box-sizing value */

*,
*::before,
*::after {
    box-sizing: border-box;
}


/* Reapply the pointer cursor for anchor tags */

a {
    cursor: revert;
}


/* Remove list styles (bullets/numbers) */

ol,
ul,
menu {
    list-style: none;
}


/* For images to not be able to exceed their container */

img {
    max-width: 100%;
}


/* removes spacing between cells in tables */

table {
    border-collapse: collapse;
}


/* revert the 'white-space' property for textarea elements on Safari */

textarea {
    white-space: revert;
}


/* fix the feature of 'hidden' attribute.
   display:revert; revert to element instead of attribute */

 :where([hidden]) {
    display: none;
}


/* revert for bug in Chromium browsers
   - fix for the content editable attribute will work properly. */

 :where([contenteditable]) {
    -moz-user-modify: read-write;
    -webkit-user-modify: read-write;
    overflow-wrap: break-word;
    -webkit-line-break: after-white-space;
}


/* apply back the draggable feature - exist only in Chromium and Safari */

 :where([draggable="true"]) {
    -webkit-user-drag: element;
}


/*style*/

body {
    font: 16px/28px arial, sans-serif;
    background-color: #f2f2f2;
    color: #3c3c3c;
}

.container {
    width: 960px;
    margin: auto;
    background-color: beige;
}

.header {
    padding: 20px;
    padding-bottom: 5px;
}

.header .judul {
    font-size: 60px;
    font-weight: bold;
}

.header ul li {
    display: inline-block;
    margin-top: 20px;
    margin-right: 10px;
}

.header a {
    text-decoration: none;
    color: #0066ff;
}

.header a:hover {
    background-color: #0052cc;
    color: #00b8e6;
}

.hero {
    height: 300px;
    background-size: cover;
    background-position: 0 -230px;
    height: 100%;
    border-top: 5px solid #3399ff;
    border-bottom: 5px solid #00b3b3;
}

.main {
    width: 600px;
    padding: 20px;
    box-sizing: border-box;
    float: left;
}

.main h2 {
    font-size: 30px;
    font-weight: bold;
    text-decoration: none;
    margin-top: 10px;
    color: #00061a;
}

.main .penulis {
    font-size: 12px;
    margin-top: 7px;
    margin-bottom: 10px;
    color: #000000;
}

.main .penulis a {
    text-decoration: none;
    color: #4dc3ff;
}

.main p {
    margin-bottom: 20px;
    font-size: 14px;
    color: #00061a;
}


/* sidebar */

.sidebar {
    width: 300px;
    float: right;
    padding: 20px;
}

.sidebar h3 {
    font-weight: bold;
    font-size: 16px;
    color: #000080;
}

.sidebar img {
    width: 90px;
    height: 90px;
    float: left;
    padding-right: 15px;
}

.sidebar p {
    font: 12px/18px arial;
}

.footer {
    width: 960px;
    background-color: #003300;
    padding: 15px;
}

.footer .copyright {
    color: #ffffff;
    text-align: center;
    font-size: 14px;
    display: block;
}


/* Clearfix */


/**
 * For modern browsers
 * 1. The space content is one way to avoid an Opera bug when the
 *    contenteditable attribute is included anywhere else in the document.
 *    Otherwise it causes space to appear at the top and bottom of elements
 *    that are clearfixed.
 * 2. The use of `table` rather than `block` is only necessary if using
 *    `:before` to contain the top-margins of child elements.
 */

.cf:before,
.cf:after {
    content: " ";
    /* 1 */
    display: table;
    /* 2 */
}

.cf:after {
    clear: both;
}


/**
  * For IE 6/7 only
  * Include this rule to trigger hasLayout and contain floats.
  */

.cf {
    *zoom: 1;
}