@import url("https://fonts.googleapis.com/css2?family=Oswald:wght@300;400;500&family=Poppins:wght@400;500&display=swap");

:root {
  --header-height: 4.5rem;
  --white: #ffffff;
  --max-width: 1600px;

  /*Color mode HSL(hue, saturation, lightness)*/
  --white-color: hsl(0, 0%, 100%);
  --black-color: hsl(0, 0%, 0%);
  --secondary-color: #2c3afc;

  /*========== Font and typography ==========*/
  --body-font: "Poppins", sans-serif;
  --header-font: "Oswald", sans-serif;

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

/*==================================================== HEADER & NAV =============================================================*/
.header {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  background: linear-gradient(90deg, #fff, #c2c4fd);
  z-index: var(--z-fixed);
}

.header.hide-header {
  transform: translateY(-100%);
  transition: transform 0.3s ease-in-out;
}

.nav {
  position: relative;
  height: var(--header-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: #000;
  font-weight: 600;
}

.nav__logo img {
  height: 100px;
  width: auto;
}

.nav__logo p {
  margin-left: 20px;
  color: var(--secondary-color);
  font-size: 20px;
}

.nav__close,
.nav__toggle {
  display: flex;
  color: var(--secondary-color);
  font-size: 1.5rem;
  cursor: pointer;
}

/* For tablets: 768px to 1150px */
@media screen and (min-width: 768px) and (max-width: 1149px) {
  .nav__logo img {
    height: 70px;
  }

  .nav__logo p {
    font-size: 16px;
    margin-left: 12px;
  }

  .nav__toggle {
    font-size: 2rem;
  }

  .nav__menu {
    padding: 6rem 4rem;
  }

  .nav__list {
    row-gap: 2.5rem;
  }

  .nav__link {
    font-size: 1.25rem;
  }

  .nav__link span::after {
    height: 2px;
  }

  .nav__social {
    column-gap: 1.5rem;
  }

  .contact-btn {
    padding: 12px 16px;
    font-size: 1rem;
  }
}

/* Navigation for mobile devices */
@media screen and (max-width: 1150px) {
  .nav__menu {
    position: fixed;
    left: -100%;
    top: 0;
    background: linear-gradient(90deg, #fff, #c2c4fd);
    width: 100%;
    height: 100%;
    padding: 6rem 3.5rem 4.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: left 0.4s;
  }

  .nav__logo img {
    height: 50px;
    width: auto;
  }

  .nav__logo p {
    margin-left: 10px;
    color: var(--secondary-color);
    font-size: 14px;
  }

  .nav__item {
    transform: translateX(-150px);
    visibility: hidden;
    transition: transform 0.4s ease-out, visibility 0.4s;
  }

  .nav__item:nth-child(1) {
    transition-delay: 0.1s;
  }
  .nav__item:nth-child(2) {
    transition-delay: 0.2s;
  }
  .nav__item:nth-child(3) {
    transition-delay: 0.3s;
  }
  .nav__item:nth-child(4) {
    transition-delay: 0.4s;
  }
  .nav__item:nth-child(5) {
    transition-delay: 0.5s;
  }
  .nav__item:nth-child(6) {
    transition-delay: 0.6s;
  }
}

.nav__list,
.nav__social {
  display: flex;
}

.nav__list {
  flex-direction: column;
  row-gap: 3rem;
  list-style: none;
}

.nav__link {
  position: relative;
  color: var(--white-color);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  transition: opacity 0.4s;
}


.nav__link i {
  font-size: 2rem;
  position: absolute;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s, visibility 0.4s;
}

.nav__link span {
  position: relative;
  transition: margin 0.4s;
  font-size: 22px;
  color: var(--secondary-color);
}

.nav__link span::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background-color: var(--white-color);
  transition: width 0.4s ease-out;
}

/* Animation link on hover */
.nav__link:hover span {
  margin-left: 2.5rem;
}

.nav__link:hover i {
  opacity: 1;
  visibility: visible;
}

.nav__link:hover span::after {
  width: 100%;
}

/* Sibling fade animation */
.nav__list:has(.nav__link:hover) .nav__link:not(:hover) {
  opacity: 0.4;
}

.nav__close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
}

.nav__social {
  column-gap: 2rem;
}

.nav__social-link {
  color: var(--white-color);
  font-size: 1.8rem;
  transition: transform 0.4s;
}

.nav__social-link:hover {
  transform: translateY(-0.55rem);
}

/* Show menu */
.show-menu {
  left: 0;
}

/* Animation link when displaying menu */
.show-menu .nav__item {
  visibility: visible;
  transform: translateX(0);
}

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

  .nav {
    height: calc(var(--header-height) + 2rem);
  }

  .nav__toggle,
  .nav__close {
    display: none;
  }

  .nav__link {
    font-size: var(--normal-font-size);
  }

  .nav__link i {
    font-size: 1.5rem;
  }

  .nav__list {
    flex-direction: row;
    column-gap: 3.5rem;
  }

  .nav__menu {
    display: flex;
    align-items: center;
    column-gap: 3.5rem;
  }
}

@media screen and (max-width: 1150px) {
  .nav__menu {
    padding: 6rem 4rem 4rem;
    font-size: 1.25rem;
  }

  .nav__item {
    margin-bottom: 2rem;
  }
}

.nav__link.active span::after {
  width: 100%;
}

.nav__link.active {
  opacity: 1 !important;
}

.header.scroll-header {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}