:root {
  --blue-color: #0C447C;
  --light-blue-color: #eff4f8;
  --dark-blue-color: #010519;
  --blue-border: 2px solid var(--blue-color);
  --blue-shadow: 0 0 3px var(--blue-color);
  --green-color: #00eb49;
  --green-border: 2px solid var(--green-color);
  --light-gray-color: #f5f5f7;
  --dark-gray-color: #353535;
  --border-radius: 6px;
  --menu-btn-padding: 0.5em;
  --header-height: 3em;
  --link-radius: 100px;
  --button-link-hover-color: #357abd;

  --surface-color: var(--light-gray-color);
  --surface-text-color: #000;
  --surface-muted-color: #353535;
  --nav-background-color: #edf2fb;
  --nav-link-color: var(--blue-color);
  --nav-shadow-color: rgba(0, 0, 0, 0.2);
  --nav-desktop-menu-link-color: var(--light-blue-color);
  --nav-desktop-menu-link-hover: #fff;
  --heading-color: #000;
  --header-background-image: url(/images/header-bg.jpg);
  --header-background-color: none;
  --header-shadow: inset 0 -1px 3px rgba(255, 255, 255, 0.6);
  --header-changed-background-color: rgba(12, 68, 124, 0.9);
  --header-changed-shadow: inset 0 -1px 3px rgba(255, 255, 255, 0.5);
  /* --header-desktop-background-color: linear-gradient(to left, rgba(255, 255, 255, 0.85) 60%, rgba(0, 0, 0, 0)); */
  /* --header-desktop-background-image: var(--header-desktop-background-color), var(--header-background-image); */
  /* --header-desktop-shadow: inset 0 -1px 3px rgba(0,0,0, 0.3); */
  --text-inverse-color: #fff;
  --text-shadow-color: #000;
  --muted-border-color: lightgray;
  --intro-surface-overlay: rgba(255, 255, 255, 0.85);
  --intro-background-color: var(--intro-surface-overlay);
  --intro-background-image: url(/images/header-bg.jpg);
  --intro-background-blend: lighten;
  --intro-text-color: #000;
  --intro-text-shadow: none;
  --intro-title-color: var(--blue-color);
  /* --intro-background-attachment: none; */
  --section-background-color: var(--light-blue-color);
  --project-card-background-color: #fff;
  --project-card-text-color: #000;
  --project-card-border-color: var(--light-blue-color);
  --project-card-form-radius: 12px;
  --project-card-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
  --project-link-hover-color: var(--light-blue-color);
  --project-link-hover-text: var(--blue-color);
  --project-github-link-color: var(--light-blue-color);
  --project-github-link-hover: #fff;
  --project-image-filter: none;
  --about-background-color: var(--light-gray-color);
  --about-link-color: var(--blue-color);
  --contact-image-shadow: var(--blue-shadow);
  --contact-link-color: #005dc5;
  --contact-link-hover: var(--light-blue-color);
  --contact-link-background-color: var(--light-blue-color);
  --contact-link-hover: #fff;
  --contact-info-shadow-color: var(--blue-color);
  --contact-form-background-color: #fff;
  --contact-form-label-color: #333333;
  --contact-form-text-color: #333333;
  --contact-form-input-color: #fafafa;
  --contact-form-input-focus: #fff;
  --footer-background-col: var(--light-gray-color);
  --footer-text-color: var(--dark-gray-color);
  --desktop-image-background-image: url(/images/river.jpg);
  --desktop-intro-image-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
}

:root, * {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--surface-color);
  color: var(--surface-text-color);
  font-family: 'Inter', sans-serif;
  margin: 0;
  padding: 0;
}

h2 {
  color: var(--heading-color);
  font-size: 2rem;
  text-align: center;
  text-transform: uppercase;
}

h3 {
  color: var(--heading-color);
  font-size: 1.5rem;
  text-align: center;
}

.intro-section,
.projects-container,
.about-section {
  padding: 1.5rem;
}

/******************/
/* Header styles */
/******************/

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  height: var(--header-height);
  position: sticky;
  top: 0;
  padding: var(--menu-btn-padding);
  background-image: var(--header-background-image);
  background-size: cover;
  background-position: center;
  box-shadow: var(--header-shadow);
  transform: translateY(0);
  transition: all 0.4s ease-in-out 0.3s;
  z-index: 100;
}

.header-hidden {
  transform: translateY(-100%);
  transition: transform 0.25s ease;
}

.logo {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5em;
  margin-inline: auto;
}

.logo-img {
  width: 6rem;
}

.logo-span {
  display: inline-block;
  font-size: 1rem;
  color: var(--green-color);
}

.header-changed {
  background-image: none;
  background-color: var(--header-changed-background-color);
  box-shadow: var(--header-changed-shadow);
}

.header-name {
  display: none;
  justify-content: center;
  align-items: center;
  font-family: "Nunito", sans-serif;
  color: var(--text-inverse-color);
  letter-spacing: 2px;
  font-weight: 900;
  text-decoration: none;
  text-transform: uppercase;
  margin-inline: auto;
}

.menu-btn {
  display: flex;
  position: relative; 
  align-items: center;
  height: 3rem;
  width: 3rem;
  cursor: pointer;
  background: none;
  border: none;
}

.menu-btn-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.55s ease-in-out, opacity  0.45s ease;
}

.menu-btn-icon svg {
  width: 1.7rem;
  height: 1.7rem;
  stroke: var(--green-color);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-visible {
  transform: scale(1);
  opacity: 1;
}

.icon-invisible {
  transform: scale(0);
  opacity: 0;
}

.nav-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 85%;
  height: 100vh;
  background-color: var(--nav-background-color);
  box-shadow: -4px 0 24px var(--nav-shadow-color);
  z-index: 100;
  overflow: auto;
  transform: translateX(-120%);
  transition: transform 0.3s ease-in-out;
}

.nav-menu-open {
  transform: translateX(0);
}

.body-no-scroll {
  overflow: hidden;
  height: 100%;
  overscroll-behavior: none;
}

.nav-menu-list {
  display: flex;
  flex-direction: column;
  list-style: none;
  padding: 1.5em;
  margin: 0;
}

.nav-menu-list li {
  border-bottom: 1px solid var(--muted-border-color);
  padding: 1em;
}

.nav-menu-list li:last-child { border-bottom: none; }

.nav-menu-link {
  display: block;
  font-size: 1.2rem;
  color: var(--nav-link-color);
  text-decoration: none;
  letter-spacing: 2px;
  padding-block: 0.5em;
}

.toggle-mode-btn {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 0.3em;
  font-size: 1.1rem;
  color: var(--nav-link-color);
  letter-spacing: 1px;
  padding-block: 0.5em;
  border: none;
  background: none;
  cursor: pointer;
}

.toggle-mode-btn svg {
  height: 1.2rem;
}

/***************/
/* Main styles */
/***************/

.intro-section {
  background-image: var(--intro-background-image);
  background-color: var(--intro-background-color);
  background-blend-mode: var(--intro-background-blend);
  background-size: cover;
  background-position: center;
  color: var(--intro-text-color);
  text-shadow: var(--intro-text-shadow);
}

.intro-title {
  position: relative;
  font-size: 1.5rem;
  letter-spacing: 1px;
  font-family: "Nunito", sans-serif;
  font-weight: 600;
  width: fit-content;
  color: var(--intro-title-color);
  margin-inline: auto;
  animation-name: scale-in;
  animation-duration: 3s;
  padding-bottom: 0.5em;
  margin-bottom: 2em;
  z-index: 0;
}

.intro-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--green-color);
  animation-name: underline-expand;
  animation-duration: 1.5s;
  animation-delay: 2s;
  animation-fill-mode: both;
  transform-origin: center;
}

@keyframes scale-in {
  from {
    scale: 140%;
    color: var(--green-color);
  }

  to {
    scale: 100%;
  }
}

@keyframes underline-expand {
  from {
    transform: scaleX(0);
  }

  to {
    transform: scaleX(1);
  }
}

.intro-greet {
  font-size: 1.5rem;
  text-align: center;
}

.intro-greet > span {
  display: block;
  font-size: 2rem;
  font-weight: bold;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-block: 0.5em;
}

.projects-section {
  background-color: var(--section-background-color);
  padding: 1.5rem 0 2.5rem;
}

.projects-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

.project-card {
  border-radius: var(--project-card-form-radius);
  box-shadow: var(--project-card-shadow);
  padding-inline: 1em;
  padding-bottom: 1.5em;
  background-color: var(--project-card-background-color);
  color: var(--project-card-text-color);
}

.project-image {
  width: 100%;
  border: 1px solid var(--dark-blue-color);
  border-radius: var(--border-radius);
}

.project-technology {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5em;
  padding: 1em;
  margin-bottom: 1em;
}

.project-info .omdb-img {
  float: right;
  margin: 0;
  height: 1rem;
}

.project-technology > span {
  display: flex;
  align-items: center;
  font-size: 0.9rem;
  padding: 0.3em 0.5em;
  border-radius: 6px;
}

.project-technology > .span-html {
  border: 2px solid rgb(249, 151, 151);
}

.project-technology > .span-css {
  border: 2px solid rgb(133, 177, 246);
}

.project-technology > .span-javascript {
  border: 2px solid rgb(252, 252, 3);
}

.project-technology > .span-react {
  border: 2px solid rgb(142, 220, 246);
}

.project-technology > .span-rest-api {
  border: 2px solid rgb(163, 163, 163);
}

.project-technology-img {
  height: 1.5em;
  margin-right: 0.5em;
}

.span-rest-api > .project-technology-img {
  filter: var(--project-image-filter);
}

.project-links {
  display: flex;
  justify-content: center;
  gap: 1em;
}

.project-link {
  letter-spacing: 0.5px;
  display: flex;
  justify-content: center;
  align-items: center;
  width: fit-content;
  padding: 0.5em 1.5em;
  background-color: var(--blue-color);
  border: 2px solid var(--blue-color);
  color: var(--text-inverse-color);
  text-decoration: none;
  border-radius: var(--link-radius);
  transition: all 0.2s ease;
}

.project-link:hover {
  background-color: var(--project-link-hover-color);
  border: var(--blue-border);
  color: var(--project-link-hover-text);
  box-shadow: none;
}

.project-github-link {
  display: flex;
  justify-content: center;
  align-items: center;
  width: fit-content;
  text-decoration: none;
  border: var(--blue-border);
  border-radius: var(--link-radius);
  background-color: var(--project-github-link-color);
  padding: 0.5em 1em;
  transition: all 0.2s ease;
}

.project-github-link:hover {
  background-color: var(--project-github-link-hover);
}

.project-github-img {
  width: 1.5rem;
  transition: all 0.2s ease;
}

.project-github-link:hover .project-github-img {
    transform: scale(1.2);
    filter: var(--project-image-filter);
  }

.about-section {
  background-color: var(--about-background-color);
}

.about-text > a {
  color: var(--about-link-color);
  text-decoration: none;
}

.about-text > a:hover,
.about-text > a:active {
  text-decoration: underline;
}

.about-section > p {
  border-bottom: var(--green-border);
  padding-bottom: 1em;
}

.about-figure {
  margin: 2em auto;
  text-align: center;
}

.about-image {
  display: block;
  width: 100%;
  outline-style: ridge;
  outline-width: 4px;
  border-radius: 1px;
}

.about-figcaption {
  position: relative;
  display: flex;
  justify-content: end;
  color: var(--text-inverse-color);
  margin-top: -2rem;
  margin-right: 1rem;
}

.contact-section {
  padding: 2rem 1.5rem;
  background-color: var(--section-background-color);
}

.contact-image {
  display: block;
  width: 18em;
  border-radius: 50%;
  box-shadow: var(--contact-image-shadow);
  margin: 2em auto;
}

.contact-link {
  display: block;
  width: fit-content;
  text-decoration: none;
  font-weight: 600;
  color: var(--contact-link-color);
  padding: 0.5em 2em;
  border: var(--blue-border);
  border-radius: var(--link-radius);
  background-color: var(--contact-link-background-color);
  margin: 0 auto 2em;
  transition: all 0.2s ease;
}

.contact-link:hover {
  background-color: var(--contact-link-hover);
}

.contact-icon {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 2rem;
  transition: transform 0.2s ease;
}

.contact-link:hover .contact-icon {
  transform: scale(1.2);
}

/****************/
/* Contact form */
/****************/
.contact-form {
  max-width: 30rem;
  margin: 1rem auto;
  padding: 2rem;
  background-color: var(--contact-form-background-color);
  border-radius: var(--project-card-form-radius);
  box-shadow: var(--project-card-shadow);
  font-family: 'Inter', sans-serif;
}

.contact-form label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--contact-form-label-color);
  font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.8rem;
  margin-bottom: 1.5rem;
  border: 1px solid #dcdcdc;
  border-radius: 6px;
  background-color: var(--contact-form-input-color);
  font-size: 1rem;
  color: var(--contact-form-text-color);
  box-sizing: border-box;
  transition: all 0.2s ease-in-out;
}

.contact-form textarea {
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--blue-color);
  background-color: var(--contact-form-input-focus);
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.15);
}

.contact-form button {
  width: 100%;
  padding: 0.9rem;
  background-color: var(--blue-color);
  color: #ffffff;
  border: none;
  border-radius: 100px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.contact-form button:hover {
  background-color: #357abd;
}

.contact-form button:active {
  transform: scale(0.98);
}


/*****************/
/* Footer styles */
/*****************/

.footer {
  display: flex;
  justify-content: center;
  align-items: center;
  border-top: 2px solid var(--muted-border-color);
  background-color: var(--footer-background-color);
  color: var(--footer-text-color);
  padding: 1em 0;
}

.footer-text > span {
  display: block;
  margin-bottom: 0.5em;
}

/*****************/
/* Media queries */
/*****************/

@media (min-width: 768px) {
  .header {
    padding: calc(var(--menu-btn-padding)*2);
  }

  .nav-menu {
    width: 40%;
    padding: calc(var(--menu-btn-padding)*2);
  }

  .intro-section {
    padding-inline: 5em;
  }

  .intro-title {
    font-size: 1.7rem;
  }

  .project-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5em;
    padding: 2em;
  }

  h3 {
    grid-column: 1 / -1;
  }

  .project-image {
    grid-row: 2;
  }

  .project-info {
    grid-row: 2;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
  }

  .about-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-inline: 5em;
  }

  .about-figure {
    width: 50%;
  }

  .footer-text > span{
    display: inline;
    margin-right: 0.5em;
  }

}

@media (min-width: 1024px) {
  .header {
    padding: 1.5em 3em;
  }

  .header-name {
    justify-content: left;
    margin: 0;
  }

  .menu-btn {
    display: none;
  }

  .logo {
    margin-inline: 0;
  }

  .nav-menu {
    position: static;
    height: initial;
    width: fit-content;
    transform: none;
    transition: none;
    background: transparent;
    border: none;
    padding: 0;
    box-shadow: none;
  }

  .nav-menu-list {
    flex-direction: row;
    justify-content: end;
    align-items: center;
  }

  .nav-menu-list li { 
    border-bottom: none; 
    background-color: var(--nav-desktop-menu-link-color);
    padding: 0;
    border-radius: 100px;
  }

  .nav-menu-link {
    font-size: 1rem;
    font-weight: 600;
    padding: 0.5em 1em;
    transition: all 0.2s ease;
  }

  .toggle-mode-btn {
    justify-content: center;
    align-items: center;
    font-size: 0.9rem;
    width: 15em;
    padding: 0.5em 1em;
    transition: all 0.2s ease;
  }

  .nav-menu-link:hover,
  .toggle-mode-btn:hover {
    background-color: var(--nav-desktop-menu-link-hover);
    border-radius: 6px;
  }

  .intro-section {
    letter-spacing: 1px;
    padding: 1em 3em 5em;
    background-attachment: fixed;
  }

  .intro-title {
    font-size: 1.7rem;
    margin-block: 1.5em;
  }

  .intro-greet {
    text-align: left;
    border-left: var(--green-border);
    padding-left: 1em;
  }

  .intro-greet > span {
    margin-top: 0.5em;
    margin-bottom: 1.5em;
  }

  .intro-description {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(3, 1fr);
    column-gap: 1em;
  }

  .intro-description > p {
    font-size: 1.2rem;
    margin: 0;
  }

  .intro-description > p:first-child {
    grid-column: 1 / 3;
    grid-row: 1;
  }

  .intro-description > p:nth-child(2) {
    grid-column: 1 / 3;
    grid-row: 2;
  }

  .intro-description > p:nth-child(3) {
    grid-column: 1 / 3;
    grid-row: 3;
  }

  .desktop-image-div {
    grid-column: 3 / -1;
    grid-row: 1 / -1;
    background-image: var(--desktop-image-background-image);
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    box-shadow: var(--desktop-intro-image-shadow);
    margin-top: -3em;
    border-radius: 4px;
  }

  .projects-section {
    padding-inline: 3em;
  }

  .projects-container {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects-container > .project-card:last-child {
    grid-column: 1 / -1;
  }

  h3 {
    font-size: 1.8rem;
  }

  p {
    font-size: 1.1rem;
  }

  .about-section {
    display: grid;
    grid-template-columns: 1fr 0.5fr;
    grid-template-rows: 3fr 1fr;
    padding: 3em 5em;
  }
  
  .about-header > p {
    font-size: 1.2rem;
  }

  .about-section > hgroup {
    padding-right: 4em;
  }

  .about-figure {
    grid-column: 2;
    grid-row: 1 / -1;
    width: 100%;
    margin: 0;
    z-index: 1;
  }

  .about-section > p {
    font-size: 1.3rem;
    text-align: center;
  }

  .contact-info {
    display: flex;
    justify-content: space-evenly;
    gap: 5rem;
    padding: 2em;
  }

  .contact-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 2em 3em;
    box-shadow: var(--project-card-shadow);
    border-radius: var(--project-card-form-radius);
  }

  .contact-card:hover {
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.4);
  }

  .contact-form {
    margin: 0;
  }

}

/*******************/
/* Dark-Light mode */
/*******************/

@media (prefers-color-scheme: dark) {
  :root {
  --surface-color: var(--dark-blue-color);
  --surface-text-color: #fff;
  --surface-muted-color: lightgray;
  --nav-background-color: var(--dark-blue-color);
  --nav-link-color: var(--light-blue-color);
  --nav-shadow-color: rgba(255, 255, 255, 0.3);
  --nav-desktop-menu-link-color: var(--dark-blue-color);
  --nav-desktop-menu-link-hover: var(--blue-color);
  --heading-color: #fff;
  /* --header-shadow: none; */
  --header-changed-background-color: rgba(8, 42, 77, 0.9);
  --intro-background-blend: darken;
  --intro-surface-overlay: rgba(0, 0, 0, 0.75);
  --intro-background-color: var(--intro-surface-overlay);
  --intro-text-color: #fff;
  --intro-text-shadow: 1px 1px 1px black;
  --intro-title-color: var(--light-blue-color);
  --section-background-color: var(--blue-color);
  --project-card-background-color: var(--dark-blue-color);
  --project-card-text-color: #fff;
  --project-card-border-color: var(--light-blue-color);
  --project-card-shadow-color: lightgray;
  --project-card-shadow: inset 0 0 3px white;
  --project-link-hover-color: var(--button-link-hover-color);
  --project-link-hover-text: #fff;
  --project-image-filter: invert(100%);
  --project-github-link-color: #d5d5d5;
  --project-github-link-hover: var(--blue-color);
  --about-background-color: var(--dark-blue-color);
  --about-link-color: gray;
  --contact-link-background-color: #b1b1b1;
  --contact-link-hover: var(--light-blue-color);
  --contact-image-shadow: 0 0 10px var(--dark-blue-color);
  --contact-info-background-color: var(--light-blue-color);
  --contact-info-shadow-color: var(--dark-blue-color);
  --contact-form-background-color: var(--dark-blue-color);
  --contact-form-label-color: #fff;
  --contact-form-text-color: #000;
  --contact-form-input-color: #b1b1b1;
  --contact-form-input-focus: #d5d5d5;
  --footer-background-color: var(--dark-blue-color);
  --footer-text-color: lightgray;
  --desktop-intro-image-shadow: inset 0 0 3px white, 0 0 24px black;
  --desktop-image-background-image: url(/images/dark-river.jpg);
  }
}

.light-mode {
  --surface-color: var(--light-gray-color);
  --surface-text-color: #000;
  --surface-muted-color: #353535;
  --nav-background-color: #edf2fb;
  --nav-link-color: var(--blue-color);
  --nav-shadow-color: rgba(0, 0, 0, 0.2);
  --nav-desktop-menu-link-color: var(--light-blue-color);
  --nav-desktop-menu-link-hover: #fff;
  --heading-color: #000;
  --header-background-image: url(/images/header-bg.jpg);
  --header-background-color: none;
  --header-shadow: inset 0 -1px 3px rgba(255, 255, 255, 0.6);
  --header-changed-background-color: rgba(12, 68, 124, 0.9);
  --header-changed-shadow: inset 0 -1px 3px rgba(255, 255, 255, 0.5);
  /* --header-desktop-background-color: linear-gradient(to left, rgba(255, 255, 255, 0.85) 60%, rgba(0, 0, 0, 0)); */
  /* --header-desktop-background-image: var(--header-desktop-background-color), var(--header-background-image); */
  /* --header-desktop-shadow: inset 0 -1px 3px rgba(0,0,0, 0.3); */
  --text-inverse-color: #fff;
  --text-shadow-color: #000;
  --muted-border-color: lightgray;
  --intro-surface-overlay: rgba(255, 255, 255, 0.85);
  --intro-background-color: var(--intro-surface-overlay);
  --intro-background-image: url(/images/header-bg.jpg);
  --intro-background-blend: lighten;
  --intro-text-color: #000;
  --intro-text-shadow: none;
  --intro-title-color: var(--blue-color);
  --section-background-color: var(--light-blue-color);
  --project-card-background-color: #fff;
  --project-card-text-color: #000;
  --project-card-border-color: var(--light-blue-color);
  --project-card-form-radius: 12px;
  --project-card-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
  --project-link-hover-color: var(--light-blue-color);
  --project-link-hover-text: var(--blue-color);
  --project-github-link-color: var(--light-blue-color);
  --project-github-link-hover: #fff;
  --project-image-filter: none;
  --about-background-color: var(--light-gray-color);
  --about-link-color: var(--blue-color);
  --contact-image-shadow: var(--blue-shadow);
  --contact-link-color: #005dc5;
  --contact-link-hover: var(--light-blue-color);
  --contact-link-background-color: var(--light-blue-color);
  --contact-link-hover: #fff;
  --contact-info-shadow-color: var(--blue-color);
  --contact-form-background-color: #fff;
  --contact-form-label-color: #333333;
  --contact-form-text-color: #333333;
  --contact-form-input-color: #fafafa;
  --contact-form-input-focus: #fff;
  --footer-background-color: var(--light-gray-color);
  --footer-text-color: var(--dark-gray-color);
  --desktop-image-background-image: url(/images/river.jpg);
  --desktop-intro-image-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
}

.dark-mode {
  --surface-color: var(--dark-blue-color);
  --surface-text-color: #fff;
  --surface-muted-color: lightgray;
  --nav-background-color: var(--dark-blue-color);
  --nav-link-color: var(--light-blue-color);
  --nav-shadow-color: rgba(255, 255, 255, 0.3);
  --nav-desktop-menu-link-color: var(--dark-blue-color);
  --nav-desktop-menu-link-hover: var(--blue-color);
  --heading-color: #fff;
  /* --header-shadow: none; */
  --header-changed-background-color: rgba(8, 42, 77, 0.9);
  --intro-background-blend: darken;
  --intro-surface-overlay: rgba(0, 0, 0, 0.75);
  --intro-background-color: var(--intro-surface-overlay);
  --intro-text-color: #fff;
  --intro-text-shadow: 1px 1px 1px black;
  --intro-title-color: var(--light-blue-color);
  --section-background-color: var(--blue-color);
  --project-card-background-color: var(--dark-blue-color);
  --project-card-text-color: #fff;
  --project-card-border-color: var(--light-blue-color);
  --project-card-shadow-color: lightgray;
  --project-card-shadow: inset 0 0 3px white;
  --project-link-hover-color: var(--button-link-hover-color);
  --project-link-hover-text: #fff;
  --project-image-filter: invert(100%);
  --project-github-link-color: #d5d5d5;
  --project-github-link-hover: var(--blue-color);
  --about-background-color: var(--dark-blue-color);
  --about-link-color: gray;
  --contact-link-background-color: #b1b1b1;
  --contact-link-hover: var(--light-blue-color);
  --contact-image-shadow: 0 0 10px var(--dark-blue-color);
  --contact-info-background-color: var(--light-blue-color);
  --contact-info-shadow-color: var(--dark-blue-color);
  --contact-form-background-color: var(--dark-blue-color);
  --contact-form-label-color: #fff;
  --contact-form-text-color: #000;
  --contact-form-input-color: #b1b1b1;
  --contact-form-input-focus: #d5d5d5;
  --footer-background-color: var(--dark-blue-color);
  --footer-text-color: lightgray;
  --desktop-intro-image-shadow: inset 0 0 3px white, 0 0 24px black;
  --desktop-image-background-image: url(/images/dark-river.jpg);
}