/* Custom properties/variables  */
:root {
  --main-grey: #abb2bf;
  --main-dark: #220b28;
  --main-white: #eed7f4;
  --main-purple: #892ca0;
}

/* Base reset */
* {
  margin: 0;
  padding: 0;
}

/* box-sizing and font sizing */
*,
*::before,
*::after {
  box-sizing: inherit;
}

html {
  box-sizing: border-box;

  /* Set font size for easy rem calculations
   * default document font size = 16px, 1rem = 16px, 100% = 16px
   * (100% / 16px) * 10 = 62.5%, 1rem = 10px, 62.5% = 10px
  */
  font-size: 62.5%;
  scroll-behavior: smooth;
}

/* Base styles */

body {
  font-family: 'Ubuntu', sans-serif;
  font-size: 1.8rem; /* 18px */
  font-weight: 400;
  line-height: 1.4;
  color: var(--main-white);
  background-image: url(../images/bg-pattern.png);
}

h1,
h2 {
  font-family: 'Raleway', sans-serif;
  font-weight: 700;
  text-align: center;
}

h1 {
  font-size: 6rem;
}

h2 {
  font-size: 4.2rem;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
  color: var(--main-white);
}

a[id="current-page"] {
  color: var(--main-grey);
  cursor: default;
  text-decoration: underline;
}

img {
  display: block;
  width: 100%;
}

/* nav */

.nav {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  margin-right: 8rem;
  padding-top: 8rem;
  width: 50%;
}

.nav-list {
  display: flex;
  flex-direction: column;
  margin-right: 2rem;
  text-align: right;
}

.section-nav {
  display: inline;
  text-align: right;
  margin-right: 3rem;
  position: relative;
  top: -5rem;
}

@media (max-width: 28.75em) {
  .nav {
    justify-content: center;
  }

  .nav-list {
    margin: 0 1rem;
  }
}

.nav li {
  margin: 2rem 0;
}

.section-nav li {
  display: inline;
  text-align: right;
}

.nav-list a,
.section-nav-list a {
  font-size: 2.2rem;
  padding: 2rem;
}

.nav-list a[class="_active"]:hover,
.section-nav-list a[class="_active"]:hover {
  color: var(--main-purple);
}

.contact-methods {
  text-align: right;
  margin-right: 10rem;
  width: 100%;
}

/* Welcome section */

.welcome-container {
  background-image: url(../images/keyboard.jpg);
  background-size: cover;
  background-repeat: no-repeat;
  height: 100vh;
  text-shadow: 2px 2px 5px var(--main-purple);
}

.welcome-top {
  display: flex;
}

.intro {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 100%;
  height: 100%;
  padding: 3rem 0 0 12rem;
}

.logo {
  color: var(--main-grey);
  text-align: left;
}

.logo code {
  color: #d19a66;
}

.welcome-section {
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 60vh;
}

.welcome-section > h1 {
  text-align: left;
}

.welcome-section > p {
  font-size: 3rem;
  font-weight: 200;
  font-style: italic;
}

.welcome-bottom {
  display: flex;
}

.next-arrow {
  width: 100%;
  text-align: right;
  padding-top: 8rem;
}

.section-header {
  max-width: 640px;
  margin: 6rem 0;
}

/* About section */
.about-section {
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.about-desc {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding-left: 4rem;
}

.about-more {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin-bottom: 4rem;
  background-color: rgba(0, 0, 0, 0.8);
}

.about-more p {
  width: 50%;
  text-align: justify;
  margin: 1rem 0;
}

/* Projects section */
.projects-section {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

@media (max-width: 28.75em) {
  .projects-section-header {
    font-size: 4rem;
  }
}

.section-background {
  background-image: url(../images/keyboard.jpg);
  border-radius: 6px;
  width: 80%;
}

.section-container {
  display: flex;
  flex-direction: column;
  margin: 0 auto;
  background-color: rgba(0, 0, 0, 0.5);
  border-radius: 6px;
  box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5), -2px -2px 4px rgba(0, 0, 0, 0.5);
  text-shadow: 2px 2px 5px var(--main-purple);
}

.section-container h2[class=logo] {
  margin: 1rem 0 0 4rem;
}

@media (max-width: 30.625em) {
  .projects-section {
    padding: 6rem 1rem;
  }
}

.code {
  color: var(--main-gray);
  transition: color 0.3s ease-out;
}

.project:hover .code {
  color: #ff7f50;
}

.section-logo {
  color: var(--main-grey);
  text-align: left;
  margin: 1rem 0 0 4rem;
}

.section-logo code {
  color: #d19a66;
}

.project-item {
  text-align: center;
  display: flex;
  width: 100%;
  margin-bottom: 5rem;
  padding: 2rem 0;
}

.project-image, .about-image, .contact-image {
  object-fit: cover;
  box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5), -2px -2px 4px rgba(0, 0, 0, 0.5);
}

.project-image {
  width: 80%;
  border-radius: 6px;
}

.about-image, .contact-image {
  width: 40%;
}

.project-title {
  font-size: 4rem;
  padding: 2rem 0.5rem;
}

.project-desc {
  width: 50%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.project-desc p, .project-desc a {
  text-align: center;
}

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  border-radius: 2px;
}

/* Contact section */
.contact-section {
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.contact-section-header > h2 {
  font-size: 6rem;
}

@media (max-width: 28.75em) {
  .contact-section-header > h2 {
    font-size: 4rem;
  }
}

.contact-section-header > p {
  font-style: italic;
}

.contact-links {
  display: flex;
  justify-content: center;
  width: 100%;
  max-width: 980px;
  margin-top: 4rem;
  flex-wrap: wrap;
}

.contact-detail {
  display: flex;
  justify-content: center;
  margin: 4rem 0;
}

.contact-me {
  display: flex;
  flex-direction: column;
}

.contact-input {
  font-family: 'Ubuntu', sans-serif;
  font-size: 1.5rem;
  width: 90%;
  height: 32px;
  margin: 1rem 0;
  padding-left: 1rem;
  border: none;
  outline: none;
  border-radius: 6px;
  background-color: rgba(0, 0, 0, 0.8);
  color: var(--main-white);
  transition: 0.3s ease-out;
}

.contact-input:hover {
  box-shadow: 2px 2px 4px rgba(27, 161, 226, 0.5), -2px -2px 4px rgba(27, 161, 226, 0.5);
}

textarea {
  padding-top: 1rem;
  max-width: 90%;
  min-height: 200px;
  resize: vertical;
}

form .btn {
  width: 40%;
  height: 48px;
  background-color: var(--main-dark);
  transition: 0.3s ease-out;
  padding: 0;
}

form .btn:hover {
  background-color: var(--main-white);
  color: var(--main-dark);
  cursor: pointer;
}

.contact-title, .about-title {
  text-align: left;
  position: relative;
  left: -12rem;
}

.about-title {
  font-size: 3rem;
}

.contact-desc {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 40%;
  text-align: left;
  padding-left: 4rem;
}

.contact-details {
  font-size: 2.4rem;
  text-shadow: 2px 2px 1px #1f1f1f;
  transition: 0.3s ease-out;
}

.contact-details:hover {
  text-shadow: 2px 2px 5px var(--main-purple);
}

.btn.contact-details {
  color: var(--main-grey);
}

/* Footer */

footer {
  font-weight: 400;
  display: flex;
  justify-content: space-evenly;
  color: var(--main-grey);
}

footer > p {
  margin: 2rem;
}

footer i {
  vertical-align: middle;
}

/*  few media query to set some font sizes at different screen sizes.
 * This helps automate a bit of responsiveness.
 * The trick is to use the rem unit for size values, margin and padding.
 * Because rem is relative to the document font size
 * when we scale up or down the font size on the document
 * it will affect all properties using rem units for the values.
*/

/* I am using the em unit for breakpoints
 * The calculation is the following
 * screen size divided by browser base font size
 * As an example: a breakpoint at 980px
 * 980px / 16px = 61.25em
*/

/* 1200px / 16px = 75em */
@media (max-width: 75em) {
  html {
    font-size: 60%;
  }
}

/* 980px / 16px = 61.25em */
@media (max-width: 61.25em) {
  html {
    font-size: 58%;
  }

  .project-item {
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }

  .project-image {
    width: 100%;
    margin-top: 3rem;
  }

  .contact-detail img {
    display: none;
  }

  .about-desc {
    padding-left: 0rem;
  }

  .contact-desc {
    width: 80%;
  }

  .about-title {
    left: 0rem;
  }

  .contact-title {
    display: none;
  }
}

/* 760px / 16px = 47.5em */
@media (max-width: 48em) {
  .section-nav {
    top: 1rem;
    margin-bottom: 2rem;
  }

  .section-nav-list a {
    font-size: 1.5rem;
    padding: 1rem 1rem;
  }

  .contact-desc {
    align-items: center;
    width: 100%;
  }

  .next-arrow {
    display: none;
  }
}

/* 460px / 16px = 28.75em */
@media (max-width: 28.75em) {
  html {
    font-size: 55%;
  }

  .section-nav {
    top: 1rem;
    margin-bottom: 2rem;
  }

  .intro {
    padding: 3rem 0 0 6rem;
  }

  footer {
    flex-direction: column;
    text-align: center;
  }
}

/* 2400px / 16px = 150em */
@media (min-width: 150em) {
    html {
      font-size: 200%;
    }

    .contact-input {
      height: 100px;
    }

    .section-background {
      background-size: cover;
    }

    .project-item {
      justify-content: center;
      align-items: center;
    }

    .project.project-tile {
      width: 50%;
    }

    form .btn {
      width: 50%;
      height: 160px;
      padding: 0;
      text-align: center;
    }

}