style.css

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    --color-primary: #6c928c;
    --color-accent: #96B499;
    --color-text: #34495e;
}

html, body {
    font-family: Source Sans Pro, Helvetica Neue, Arial, sans-serif;
    height: 100%;
    color: var(--color-text);
    font-size: 16px;
    line-height: 24px;
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
}

body {
    display: flex;
}

a {
    color: #3498DB;
    cursor: pointer;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

img {
    height: auto;
    max-width: 100%;
}

strong {
    font-weight: 700;
}

ul {
    display: block;
    padding: 0 16px;
}

input[type=number] {
    -moz-appearance: textfield;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
}

input[type=color] {
    padding: 0;
    border: none;
    outline: none;
    cursor: pointer;
}

input ::-webkit-color-swatch-wrapper {
    background: white;
}

input ::-webkit-color-swatch {
    position: relative;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

::-webkit-input-placeholder {
    color: #999;
}

::-moz-placeholder {
    color: #999;
}

:-moz-placeholder {
    color: #999;
}

:-ms-input-placeholder {
    color: #999;
}

h1, h2, h3 {
    font-weight: 600;
    line-height: 24px;
}

h1 {
    font-size: 20px;
}

h2 {
    font-size: 18px;
}

h3 {
    font-size: 16px;
}

.mt1 {
    margin-top: 12px;
}

.mt-2 {
    margin-top: 16px;
}

aside {
    overflow-y: auto;
    width: 280px;
    border-right: 1px solid #ddd;
}

aside::-webkit-scrollbar {
    width: 3px;
}

aside::-webkit-scrollbar-thumb {
    background: #ccc;
}

main {
    flex: 1;
    overflow: auto;
}

.container {
    margin: 0 auto;
    min-width: 960px;
    max-width: 1440px;
    padding: 20px;
}

.side-nav {
    border-top: 1px solid #ddd;
    line-height: 2em;
    padding: 10px 0 20px 30px;
}

.side-nav p {
    margin-top: 10px;
    font-weight: 700;
}

.side-nav ul {
    padding: 0;
    margin-left: 30px;
}

.side-nav li.active {
    color: var(--color-primary);
    border-right: 2px solid var(--color-primary);
}

.side-nav a {
    color: inherit;
}

.logo a {
    color: var(--color-primary);
}

aside .logo {
    cursor: pointer;
    font-weight: 700;
    font-size: 24px;
    text-align: center;
    padding: 20px 0;
}

header, header .container {
    background: #565656;
}

header .container {
    display: flex;
    height: 30px;
    color: white;
    padding: 0 20px;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

header .logo {
    font-size: 24px;
    color: white;
}

.nav-item {
    color: white;
    cursor: pointer;
    margin-left: 16px;
}

.nav {
    justify-content: space-between;
}

.nav .item:hover {
    color: #f1f1f1;
}

footer {
    margin: 32px;
    text-align: center;
}

.tile {
    padding: 10px 16px;
    background: #f5f5f5;
    font-size: 14px;
    line-height: 32px;
    border-radius: 3px;
}

.text-info {
    color: #0f81cc !important;
}

.text-success {
    color: #23d160 !important;
}

.text-error {
    color: #ff3860 !important;
}

.input, .textarea, input[type='checkbox'] {
    appearance: none;
    -moz-appearance: none;
    -webkit-appearance: none;
}

.input, .textarea, .button, input[type='checkbox'], .static, .select {
    border-radius: 3px;
    border: 1px solid #dbdbdb;
    align-items: center;
    color: var(--color-text);
    display: inline-flex;
    position: relative;
}

.input, .textarea, .button, .file-cta, .file-name, .static, .select {
    outline: none;
    font-size: 14px;
    line-height: 18px;
    min-height: 34px;
}

.input, .textarea {
    max-width: 100%;
    width: 100%;
}

.input.error, .textarea.error {
    border: 1px solid #ff3860;
}

.input, .textarea, .file-cta, .file-name {
    padding: 8px 12px;
}

.button, .file-cta, .file-name, .static {
    padding: 8px 16px;
}

.input:hover, .textarea:hover, input[type='checkbox']:hover, .select:hover, .input:focus, .textarea:focus {
    border-color: var(--color-primary);
}

.input[disabled], .textarea[disabled] {
    background: #f5f5f5;
    border-color: #dbdbdb;
}

.select {
    padding: 0 12px;
    flex-shrink: 0;
}

.static {
    flex-shrink: 0;
    background: #f5f5f5;
}

.static:hover {
    border-color: #dbdbdb !important;
}

.textarea {
    display: block;
    max-width: 100%;
    min-width: 100%;
    resize: vertical;
    line-height: 22px;
}

.textarea.fixed-size {
    resize: none;
}

.help {
    font-size: 14px;
    line-height: 40px;
}

.button {
    cursor: pointer;
    background: white;
    justify-content: center;
    text-align: center;
    white-space: nowrap;
}

.button:hover {
    border-color: #b5b5b5;
}

.button:active {
    background: #f9f9f9;
}

.button.primary {
    color: white;
    z-index: 3;
    border-color: var(--color-primary);
    background: var(--color-primary);
}

.button.primary:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.fa {
    padding: 0 !important;
}

.button span:first-child {
    margin-right: 1em;
}

.button span:last-child {
    margin-left: 1em;
}

.content-center {
    display: flex;
    justify-content: center
}

.content-center *:not(:first-child) {
    margin-left: 1em;
}

.select {
    cursor: pointer;
}

.select option {
    font-size: 18px;
}

.checkbox input {
    width: 21px;
    height: 21px;
    color: white;
    outline: none;
    cursor: pointer;
    justify-content: center;
    font-size: 14px;
}

.checkbox input:after {
    content: '✓';
}

.checkbox input:checked {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.checkbox span {
    margin-left: 6px;
}

.flex .checkbox:not(:first-child) {
    display: flex;
    margin-left: 16px;
    align-items: center;
    word-break: keep-all;
}

.file, .file-zone {
    display: flex;
    cursor: pointer;
    overflow: hidden;
    position: relative;
}

.fullwidth .file-name {
    flex-grow: 1;
    max-width: none;
}

.file-zone {
    flex-direction: column;
    border-radius: 3px;
}

.file-input {
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    opacity: 0;
    position: absolute;
    outline: none;
    cursor: pointer;
}

.file-button {
    margin-left: 8px;
}

.file-cta, .file-name {
    display: flex;
    align-items: center;
    outline: none;
}

.file .file-cta {
    border-radius: 3px 0 0 3px;
    background: var(--color-primary);
    color: white;
}

.file-zone .file-cta {
    flex-direction: column;
    height: auto;
    display: inline-flex;
    font-size: 20px;
    align-items: center;
    padding: 24px 48px;
    border-radius: 0;
    background: var(--color-primary);
    color: white;
}

.file-cta:hover {
    background: var(--color-accent);
}

.file .file-name {
    border: 1px solid #dbdbdb;
    border-left: none;
    border-radius: 0 3px 3px 0;
}

.file-zone .file-name {
    display: inline-flex;
    justify-content: center;
    border-radius: 0 0 3px 3px;
    border: solid #dbdbdb;
    border-width: 0 1px 1px 1px;
    padding: 12px 0;
}

.file-zone .file-icon {
    margin-bottom: 16px;
    height: 24px;
    width: 24px;
}

table td, table th {
    vertical-align: top;
}

table td:not([align]),
table th:not([align]) {
    text-align: left;
}

.table {
    border-collapse: collapse;
    border-spacing: 0;
    word-break: break-all;
    font-size: 14px;
}

.table td, .table th {
    border: 1px solid #dbdbdb;
    padding: 5px 12px;
}

.table.fullwidth {
    display: table;
}

.table.divide {
    table-layout: fixed
}

.table.striped thead tr, .table.striped tbody tr:nth-child(even) {
    background: #f5f5f5;
}

.table code {
    background: transparent;
}

.progress {
    -moz-appearance: none;
    -webkit-appearance: none;
    border: none;
    border-radius: 290486px;
    display: block;
    height: 1rem;
    overflow: hidden;
    padding: 0;
    width: 100%;
}

.progress::-webkit-progress-bar {
    background: #dbdbdb;
}

.progress::-webkit-progress-value {
    background: var(--color-accent);
}

.progress::-moz-progress-bar {
    background: var(--color-accent);
}

.progress::-ms-fill {
    background: #96B499;
    border: none;
}

.tag {
    background: #f5f5f5;
    border-radius: 3px;
    color: #4a4a4a;
    display: inline-block;
    font-size: 12px;
    height: 32px;
    line-height: 32px;
    padding: 0 12px;
    white-space: nowrap;
}

.tag {
    margin-right: 16px;
}

.content h1,
.content h2,
.content h3,
.content h4 {
    margin-bottom: 8px;
}

.content li + li {
    margin-top: 4px;
}

.content p:not(:last-child),
.content ol:not(:last-child),
.content ul:not(:last-child),
.content pre:not(:last-child),
.content table:not(:last-child) {
    margin-bottom: 16px;
}

.flex {
    display: flex;
}

.inline {
    width: auto;
    display: inline;
}

.bordered {
    border-radius: 2px;
    border: 1px solid #dbdbdb;
}

.fullwidth {
    width: 100%;
}

.fullHeight {
    height: 100%;
}

.group {
    display: inline-flex;
}

.group * {
    border-radius: 0;
}

.group *:not(:first-child) {
    margin-left: -1px;
}

.group *:first-child {
    border-radius: 3px 0 0 3px;
}

.group *:last-child {
    border-radius: 0 3px 3px 0;
}

.group *:not(.primary):hover {
    z-index: 3;
    border-color: #b5b5b5;
}

.group *:focus {
    z-index: 4;
}

.mid-menus {
    align-items: center;
    justify-content: center;
    width: 130px;
    display: flex;
    padding: 0 16px;
}

.mid-menus * {
    width: 100%;
}

.mid-menus .button {
    margin: 0;
}

.mid-menus .button:not(:first-child) {
    margin-top: 16px;
}

.tools {
    margin-bottom: 16px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

@media screen and (max-width: 1200px) {
    aside {
        display: none;
    }

    .tools {
        grid-template-columns: repeat(3, 1fr);
    }
}

.tool {
    cursor: pointer;
    padding: 16px;
    background: white;
    border-radius: 5px;
}

.tool:hover {
    text-decoration: none;
    background: #f5f7f9;
    box-shadow: 1px 1px 1px #dbdbdb;
}

.tool :first-child {
    color: var(--color-text);
    font-weight: 600;
    margin-bottom: 12px;
}

.tool :last-child:hover {
    text-decoration: underline;
}

.editarea {
    width: 1px;
    height: 90vh;
    flex-grow: 1
}