/*=============== GOOGLE FONTS ===============*/
@import url("https://fonts.googleapis.com/css2?family=Montserrat+Alternates:wght@400;600;700&display=swap");

/*=============== VARIABLES CSS ===============*/
:root {
  /*========== Colors ==========*/
  /*Color mode HSL(hue, saturation, lightness)*/
  --first-color: hsl(225, 95%, 56%);
  --black-color: hsl(225, 12%, 12%);
  --white-color: hsl(0, 0%, 100%);
  --text-color: hsl(225, 8%, 65%);
  --body-color: hsl(225, 100%, 99%);

  /*========== Font and typography ==========*/
  /*.5rem = 8px | 1rem = 16px ...*/
  --body-font: "Montserrat Alternates", sans-serif;
  --biggest-font-size: 2.5rem;
  --tiny-font-size: .625rem;

  /*========== Font weight ==========*/
  --font-regular: 400;
  --font-semi-bold: 600;
  --font-bold: 700;

  /*========== z index ==========*/
  --z-tooltip: 10;
  --z-fixed: 100;
}

/*========== Responsive typography ==========*/
@media screen and (min-width: 1150px) {
  :root {
    --biggest-font-size: 3.5rem;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--body-font);
  background-color: var(--body-color);
  color: var(--text-color);
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
}

/*=============== REUSABLE CSS CLASSES ===============*/
.container {
  max-width: 1120px;
  margin-inline: 1.5rem;
}

/* Remove the property of 100vh, when inserting its content */
.section {
  height: 100vh;
  padding-block: 2.5rem;
}

.section h1 {
  font-size: var(--biggest-font-size);
  color: var(--black-color);
  text-align: center;
}

/*=============== NAVBAR ===============*/
.nav {
  position: fixed;
  bottom: 1.5rem;
  left: 0;
  right: 0;
  background-color: var(--black-color);
  width: 88%;
  margin-inline: auto;
  box-shadow: 0 2px 16px hsla(228, 95%, 4%, .1);
  padding: 1rem 1.75rem;
  border-radius: 4rem;
  z-index: var(--z-fixed);
}

.nav__list {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__link {
  color: var(--text-color);
  font-size: 1.5rem;
  transition: color .4s;
}

.nav__link:hover {
  color: var(--white-color);
}

/*=============== EXPAND LIST ===============*/
.nav__expand {
  border: none;
  outline: none;
  width: 40px;
  height: 40px;
  background-color: var(--first-color);
  border-radius: 50%;
  cursor: pointer;
}

.nav__expand-icon {
  display: inline-block;
  color: var(--white-color);
  font-size: 1.5rem;
  transition: transform .4s;
}

.nav__expand-list {
  position: absolute;
  top: -4.5rem;
  left: 0;
  right: 0;
  background-color: var(--black-color);
  box-shadow: 0 2px 16px hsla(228, 95%, 4%, .1);
  width: max-content;
  margin-inline: auto;
  padding: .5rem 1.5rem;
  border-radius: 4rem;
  display: flex;
  column-gap: 2rem;
  z-index: -1;
  overflow: hidden;
  transform: translateY(5rem) scale(.1);
  transition: transform .5s cubic-bezier(.5, 1.8, .4, .8);
}

.nav__expand-list li {
  transform: translateY(-3rem);
  transition: transform .4s;
}

.nav__expand-list li:nth-child(1) {
  transition-delay: .2s;
}

.nav__expand-list li:nth-child(2) {
  transition-delay: .3s;
}

.nav__expand-list li:nth-child(3) {
  transition-delay: .4s;
}

.nav__expand-link {
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: color .4s;
}

.nav__expand-link i {
  font-size: 1.5rem;
}

.nav__expand-link span {
  font-size: var(--tiny-font-size);
  font-weight: var(--font-semi-bold);
}

.nav__expand-link:hover {
  color: var(--white-color);
}

/* Show list */
.show-list,
.show-list li{
  transform: translateY(0);
}

/* Rotate icon */
.rotate-icon {
  transform: rotate(135deg);
}

/* Active link */
.active-link {
  color: var(--white-color);
}

/*=============== BREAKPOINTS ===============*/
/* For medium devices */
@media screen and (min-width: 450px) {
  .nav {
    width: 350px;
  }
}

/* For large devices */
@media screen and (min-width: 1150px) {
  .container {
    margin-inline: auto;
  }
}