Building a Dashboard Layout With CSS and a Touch of JavaScript

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    <rect x="11.84" y="9.87" width="2" height="5.93" transform="translate(-5.32 12.84) rotate(-45)" />
  </symbol>
</svg>
<header class="page-header">
  <nav>
    <a href="#0" aria-label="forecastr logo" class="logo">
      <svg width="140" height="49">
        <use xlink:href="#logo"></use>
      </svg>
    </a>
    <button class="toggle-mob-menu" aria-expanded="false" aria-label="open menu">
      <svg width="20" height="20" aria-hidden="true">
        <use xlink:href="#down"></use>
      </svg>
    </button>
    <ul class="admin-menu">
      <li class="menu-heading">
        <h3>Admin</h3>
      </li>
      <li>
        <a href="#0">
          <svg>
            <use xlink:href="#pages"></use>
          </svg>
          <span>Pages</span>
        </a>
      </li>
      <li>
        <a href="#0">
          <svg>
            <use xlink:href="#users"></use>
          </svg>
          <span>Users</span>
        </a>
      </li>
      <li>
        <a href="#0">
          <svg>
            <use xlink:href="#trends"></use>
          </svg>
          <span>Trends</span>
        </a>
      </li>
      <li>
        <a href="#0">
          <svg>
            <use xlink:href="#collection"></use>
          </svg>
          <span>Collection</span>
        </a>
      </li>
      <li>
        <a href="#0">
          <svg>
            <use xlink:href="#comments"></use>
          </svg>
          <span>Comments</span>
        </a>
      </li>
      <li>
        <a href="#0">
          <svg>
            <use xlink:href="#appearance"></use>
          </svg>
          <span>Appearance</span>
        </a>
      </li>
      <li class="menu-heading">
        <h3>Settings</h3>
      </li>
      <li>
        <a href="#0">
          <svg>
            <use xlink:href="#settings"></use>
          </svg>
          <span>Settings</span>
        </a>
      </li>
      <li>
        <a href="#0">
          <svg>
            <use xlink:href="#options"></use>
          </svg>
          <span>Options</span>
        </a>
      </li>
      <li>
        <a href="#0">
          <svg>
            <use xlink:href="#charts"></use>
          </svg>
          <span>Charts</span>
        </a>
      </li>
      <li>
        <div class="switch">
          <input type="checkbox" id="mode" checked>
          <label for="mode">
            <span></span>
            <span>Dark</span>
          </label>
        </div>
        <button class="collapse-btn" aria-expanded="true" aria-label="collapse menu">
          <svg aria-hidden="true">
            <use xlink:href="#collapse"></use>
          </svg>
          <span>Collapse</span>
        </button>
      </li>
    </ul>
  </nav>
</header>
<section class="page-content">
  <section class="search-and-user">
    <form>
      <input type="search" placeholder="Search Pages...">
      <button type="submit" aria-label="submit form">
        <svg aria-hidden="true">
          <use xlink:href="#search"></use>
        </svg>
      </button>
    </form>
    <div class="admin-profile">
      <span class="greeting">Hello admin</span>
      <div class="notifications">
        <span class="badge">1</span>
        <svg>
          <use xlink:href="#users"></use>
        </svg>
      </div>
    </div>
  </section>
  <section class="grid">
    <article></article>
    <article></article>
    <article></article>
    <article></article>
    <article></article>
    <article></article>
    <article></article>
    <article></article>
  </section>
  <footer class="page-footer">
    <span>made by </span>
    <a href="https://georgemartsoukos.com/" target="_blank">
      <img width="24" height="24" src="https://assets.codepen.io/162656/george-martsoukos-small-logo.svg" alt="George Martsoukos logo">
    </a>
  </footer>
</section>

CSS

              
                /* RESET RULES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
@import url("https://fonts.googleapis.com/css?family=Lato:400,700&display=swap");

:root {
  --page-header-bgColor: #242e42;
  --page-header-bgColor-hover: #1d2636;
  --page-header-txtColor: #dde9f8;
  --page-header-headingColor: #7889a4;
  --page-header-width: 220px;
  --page-content-bgColor: #f0f1f6;
  --page-content-txtColor: #171616;
  --page-content-blockColor: #fff;
  --white: #fff;
  --black: #333;
  --blue: #00b9eb;
  --red: #ec1848;
  --border-radius: 4px;
  --box-shadow: 0 0 10px -2px rgba(0, 0, 0, 0.075);
  --switch-bgLightModeColor: #87cefa;
  --switch-sunColor: gold;
  --switch-moonColor: #f4f4f4;
  --switch-bgDarkModeColor: #1f1f27;
}

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

ul {
  list-style: none;
}

a,
button {
  color: inherit;
}

a {
  text-decoration: none;
}

button {
  background: none;
  cursor: pointer;
}

input {
  -webkit-appearance: none;
}

[type="checkbox"] {
  position: absolute;
  left: -9999px;
}

label {
  cursor: pointer;
}

button,
input {
  border: none;
}

svg {
  display: block;
}

body {
  font: 16px/1.5 "Lato", sans-serif;
}


/* HEADER STYLES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.page-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: auto;
  padding-top: 20px;
  width: var(--page-header-width);
  color: var(--page-header-txtColor);
  background: var(--page-header-bgColor);
}

/*In case you prefer an absolutely positioned header that covers the full page height, add these styles*/
/*body {
  position: relative;
}

.page-header {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
}*/

/*remove these styles*/
/*.page-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: auto;
}*/

.page-header nav {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.page-header .logo {
  display: block;
  margin: 0 15px;
}

.page-header .logo svg {
  max-width: 120px;
  fill: var(--white);
}

.page-header .toggle-mob-menu {
  display: none;
  margin-left: 5px;
  padding: 4px;
  background: var(--page-content-blockColor);
  border-radius: var(--border-radius);
}

.page-header .toggle-mob-menu svg {
  fill: var(--black);
  transition: transform 0.2s;
}

.page-header .admin-menu {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  margin-top: 35px;
}

.page-header .admin-menu li:nth-last-child(2) {
  margin-bottom: 35px;
}

.page-header .admin-menu li:last-child {
  margin-top: auto;
  margin-bottom: 20px;
}

.page-header .admin-menu li > * {
  width: 100%;
  padding: 12px 15px;
}

.page-header .admin-menu .switcher {
  display: inline-block;
  width: auto;
}

.page-header .admin-menu .menu-heading h3 {
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 12px;
  margin-top: 12px;
  color: var(--page-header-headingColor);
}

.page-header .admin-menu svg {
  width: 20px;
  height: 20px;
  fill: var(--page-header-txtColor);
  margin-right: 10px;
}

.page-header .admin-menu a,
.page-header .admin-menu button {
  display: flex;
  align-items: center;
  font-size: 0.9rem;
}

.page-header .admin-menu a:hover,
.page-header .admin-menu a:focus,
.page-header .admin-menu button:hover,
.page-header .admin-menu button:focus {
  background: var(--page-header-bgColor-hover);
  color: var(--blue);
  outline: none;
}

.page-header .admin-menu a:hover svg,
.page-header .admin-menu a:focus svg,
.page-header .admin-menu button:hover svg,
.page-header .admin-menu button:focus svg {
  fill: var(--blue);
}


/* PAGE CONTENT STYLES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.page-content {
  position: relative;
  left: var(--page-header-width);
  width: calc(100% - var(--page-header-width));
  min-height: 100vh;
  padding: 30px;
  color: var(--page-content-txtColor);
  background: var(--page-content-bgColor);
}

.search-and-user {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-column-gap: 50px;
  align-items: center;
  background: var(--page-content-bgColor);
  margin-bottom: 30px;
}

.search-and-user form {
  position: relative;
}

.search-and-user [type="search"] {
  width: 100%;
  height: 50px;
  font-size: 1.5rem;
  padding-left: 15px;
  background: var(--page-content-blockColor);
  color: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.search-and-user ::placeholder {
  color: var(--page-content-txtColor);
}

.search-and-user form svg {
  width: 26px;
  height: 26px;
  fill: var(--page-content-txtColor);
}

.search-and-user form button {
  position: absolute;
  top: 50%;
  right: 15px;
  transform: translateY(-50%);
}

.search-and-user .admin-profile {
  display: flex;
  align-items: center;
}

.search-and-user .admin-profile .greeting {
  margin: 0 10px 0 20px;
}

.search-and-user .admin-profile svg {
  width: 30px;
  height: 30px;
}

.search-and-user .admin-profile .notifications {
  position: relative;
}

.search-and-user .admin-profile .badge {
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: -10px;
  right: -3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  font-size: 10px;
  color: var(--white);
  background: var(--red);
}

.page-content .grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-gap: 30px;
}

.page-content .grid > article {
  display: flex;
  height: 300px;
  background: var(--page-content-blockColor);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.page-content .grid > article:first-child,
.page-content .grid > article:last-child {
  grid-column: 1 / -1;
}


/* MQ RULES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
@media screen and (max-width: 767px) {
  .page-header,
  .page-content {
    position: static;
    width: 100%;
  }

  .page-header {
    padding: 10px;
  }

  .page-header nav {
    flex-direction: row;
  }

  .page-header .logo {
    margin: 0;
  }

  .page-header .logo svg {
    width: 83px;
    height: 35px;
  }

  .page-header .toggle-mob-menu {
    display: block;
  }

  .page-header .admin-menu {
    position: absolute;
    left: 98px;
    top: 57px;
    margin-top: 0;
    z-index: 2;
    border-radius: var(--border-radius);
    background: var(--page-header-bgColor);
    visibility: hidden;
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.2s;
  }

  .page-header .admin-menu li:nth-last-child(2) {
    margin-bottom: 12px;
  }

  .page-header .admin-menu li:last-child button,
  .search-and-user .admin-profile .greeting {
    display: none;
  }

  .page-content {
    min-height: 0;
    padding: 10px;
  }

  .page-content .grid {
    grid-gap: 10px;
  }

  .search-and-user {
    position: absolute;
    left: 131px;
    top: 10px;
    padding: 0;
    grid-column-gap: 5px;
    width: calc(100% - 141px);
    border-radius: var(--border-radius);
    background: transparent;
  }

  .search-and-user [type="search"] {
    font-size: 1rem;
    height: 35px;
  }

  .search-and-user form svg {
    width: 18px;
    height: 18px;
  }

  .search-and-user .admin-profile svg {
    fill: var(--white);
  }
}

@media screen and (max-width: 400px) {
  .page-content .grid > article {
    grid-column: 1 / -1;
  }
}


/* BODY CLASSES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.mob-menu-opened .toggle-mob-menu svg {
  transform: rotate(180deg);
}

.mob-menu-opened .page-header .admin-menu {
  transform: scale(1);
  visibility: visible;
  opacity: 1;
}

@media screen and (min-width: 768px) {
  .collapsed .page-header {
    width: 40px;
  }

  .collapsed .page-header .admin-menu li > * {
    padding: 10px;
  }

  .collapsed .page-header .logo,
  .collapsed .page-header .admin-menu span,
  .collapsed .page-header .admin-menu .menu-heading {
    display: none;
  }

  .collapsed .page-header .admin-menu svg {
    margin-right: 0;
  }

  .collapsed .page-header .collapse-btn svg {
    transform: rotate(180deg);
  }

  .collapsed .page-content {
    left: 40px;
    width: calc(100% - 40px);
  }
}


/* SWITCH STYLES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.switch label {
  display: grid;
  grid-template-columns: auto auto;
  grid-column-gap: 10px;
  align-items: center;
  justify-content: flex-start;
}

.switch span:first-child {
  position: relative;
  width: 50px;
  height: 26px;
  border-radius: 15px;
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.4);
  background: var(--switch-bgLightModeColor);
  transition: all 0.3s;
}

.switch span:first-child::before,
.switch span:first-child::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.switch span:first-child::before {
  top: 1px;
  left: 1px;
  width: 24px;
  height: 24px;
  background: var(--white);
  z-index: 1;
  transition: transform 0.3s;
}

.switch span:first-child::after {
  top: 50%;
  right: 8px;
  width: 10px;
  height: 10px;
  transform: translateY(-50%);
  background: var(--switch-sunColor);
  box-shadow: 0 0 4px 2px #ffdb1a;
}

.switch [type="checkbox"]:checked + label span:first-child {
  background: var(--switch-bgDarkModeColor);
}

.switch [type="checkbox"]:focus + label span:first-child {
  box-shadow: 0 3px 5px rgba(255, 255, 255, 0.25);
}

.switch [type="checkbox"]:checked + label span:first-child::before {
  transform: translateX(24px);
}

.switch [type="checkbox"]:checked + label span:first-child::after {
  left: 12px;
  width: 15px;
  height: 15px;
  background: transparent;
  box-shadow: -2px -5px 0 var(--switch-moonColor);
  transform: translateY(-50%) rotate(-72deg);
}


/* LIGHT MODE STYLES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.light-mode {
  --page-header-bgColor: #f1efec;
  --page-header-bgColor-hover: #b9e4e0;
  --page-header-txtColor: #2c303a;
  --page-header-headingColor: #979595;
  --page-content-bgColor: #fff;
  --box-shadow: 0 0 10px -2px rgba(0, 0, 0, 0.25);
}

.light-mode .page-header .admin-menu a:hover,
.light-mode .page-header .admin-menu a:focus,
.light-mode .page-header .admin-menu button:hover,
.light-mode .page-header .admin-menu button:focus {
  color: var(--black);
}

.light-mode .page-header .logo svg,
.light-mode .page-header .admin-menu a:hover svg,
.light-mode .page-header .admin-menu a:focus svg,
.light-mode .page-header .admin-menu button:hover svg,
.light-mode .page-header .admin-menu button:focus svg {
  fill: var(--black);
}

.light-mode .switch [type="checkbox"]:focus + label span:first-child {
  box-shadow: 0 3px 5px rgba(0, 0, 0, 0.25);
}

@media screen and (max-width: 767px) {
  .light-mode .search-and-user .admin-profile svg {
    fill: var(--black);
  }
}


/* FOOTER
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.page-footer {
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-top: 10px;
}

.page-footer a {
  margin-left: 4px;
}

JS

              
                const html = document.documentElement;
const body = document.body;
const menuLinks = document.querySelectorAll(".admin-menu a");
const collapseBtn = document.querySelector(".admin-menu .collapse-btn");
const toggleMobileMenu = document.querySelector(".toggle-mob-menu");
const switchInput = document.querySelector(".switch input");
const switchLabel = document.querySelector(".switch label");
const switchLabelText = switchLabel.querySelector("span:last-child");
const collapsedClass = "collapsed";
const lightModeClass = "light-mode";

/*TOGGLE HEADER STATE*/
collapseBtn.addEventListener("click", function () {
  body.classList.toggle(collapsedClass);
  this.getAttribute("aria-expanded") == "true"
    ? this.setAttribute("aria-expanded", "false")
    : this.setAttribute("aria-expanded", "true");
  this.getAttribute("aria-label") == "collapse menu"
    ? this.setAttribute("aria-label", "expand menu")
    : this.setAttribute("aria-label", "collapse menu");
});

/*TOGGLE MOBILE MENU*/
toggleMobileMenu.addEventListener("click", function () {
  body.classList.toggle("mob-menu-opened");
  this.getAttribute("aria-expanded") == "true"
    ? this.setAttribute("aria-expanded", "false")
    : this.setAttribute("aria-expanded", "true");
  this.getAttribute("aria-label") == "open menu"
    ? this.setAttribute("aria-label", "close menu")
    : this.setAttribute("aria-label", "open menu");
});

/*SHOW TOOLTIP ON MENU LINK HOVER*/
for (const link of menuLinks) {
  link.addEventListener("mouseenter", function () {
    if (
      body.classList.contains(collapsedClass) &&
      window.matchMedia("(min-width: 768px)").matches
    ) {
      const tooltip = this.querySelector("span").textContent;
      this.setAttribute("title", tooltip);
    } else {
      this.removeAttribute("title");
    }
  });
}

/*TOGGLE LIGHT/DARK MODE*/
if (localStorage.getItem("dark-mode") === "false") {
  html.classList.add(lightModeClass);
  switchInput.checked = false;
  switchLabelText.textContent = "Light";
}

switchInput.addEventListener("input", function () {
  html.classList.toggle(lightModeClass);
  if (html.classList.contains(lightModeClass)) {
    switchLabelText.textContent = "Light";
    localStorage.setItem("dark-mode", "false");
  } else {
    switchLabelText.textContent = "Dark";
    localStorage.setItem("dark-mode", "true");
  }
});

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