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

:root {
  --darker-navy: #091528;
  --dark-navy: #0a192f;
  --navy: #0e2342;
  --light-navy: #163767;
  --lighter-navy: #134e77;
  --muted-navy: #233554;
  --slate: #ccd6f6;
  --dark-slate: #8892b0;
  --cyan: #33d6dc;
}


html {
  font-size: 62.5%;
}

body {
  font-family: sans-serif;
  color: var(--slate);
  background-color: var(--dark-navy);
}

.wrap {
  margin: auto;
  width: 90%;
}

@media (max-width: 768px) {
  .wrap {
    width: 100%;
    padding-left: 2.5rem;
    padding-right: 2.5rem;
  }
}

@media (min-width: 1025px) {
  .wrap {
    width: 70%;
    min-width: 900px;
    max-width: 120rem;
  }
}

@media (min-width: 769px) {
  .mobile-only {
    display: none !important;
  }
}

@media (max-width: 768px) {
  .non-mobile-only {
    display: none !important;
  }
}
  
/**************************/
/* BUTTONS */
/**************************/

.btn-primary {
    display: inline-block;
    text-decoration: none;
    color: var(--cyan);
    font-size: 2.2rem;
    padding: 1.6rem 3.2rem;
    background-color: transparent;
    border: 1px solid var(--cyan);
    border-radius: 4px;
    cursor: pointer;
    font-family: inherit;
    text-align: center;
    line-height: 1;
    appearance: none;
}

.btn-primary:visited {
  color: var(--cyan);
}

.btn-primary:hover {
  background-color: var(--muted-navy) !important;
}

@media (max-width: 768px) {
  .btn-primary {
    padding: 1rem 2rem;
    font-size: 1.6rem;
  }
}

.btn-secondary {
  display: inline-block;
  padding: 1.2rem 2.4rem;
  border-radius: 9px;
  background-color: var(--lighter-navy);
  color: var(--slate);
  text-decoration: none;
  border: none;
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  text-align: center;
  appearance: none;
  line-height: 1;
}

.btn-secondary:hover,
.btn-secondary:active {
  background-color: var(--cyan) !important;
  color: #000 !important;
}

/**************************/
/* HEADER */
/**************************/

.header {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 3rem 4.8rem;
    width: 100%;
}

/**************************/
/* NAVIGATION */
/**************************/
.main-nav {
  position: fixed;
  z-index: 5;
  width: 100%;
  top: 0;
  left: 0;
  background-color: var(--dark-navy);
  padding: 2rem 2.5rem;
  display: flex;
  justify-content: flex-end;
}

.main-nav-list {  
  list-style: none;
  display: flex;
  font-family: karla, sans-serif;
  align-items: center;
  gap: 4.5rem; 
}

.main-nav-link:link,
.main-nav-link:visited {
  display: inline-block;
  text-decoration: none;
  color: var(--slate);
  font-weight: 500;
  font-size: 1.8rem;
  transition: all 0.3s;
}

.main-nav-link:hover,
.main-nav-link:active {
  color: var(--cyan);
}

@media (min-width: 769px) and (max-width: 1024px) {
  .main-nav-list {
    gap: 2rem;
  }
}

/**************************/
.mobile-nav {
  position: fixed;
  z-index: 5;
  width: 100%;
  top: 0;
  left: 0;
  background-color: var(--dark-navy);
  padding: 1rem 2.5rem;
  display: flex;
  justify-content: flex-end;
}

.menu-toggle {
  position: relative;
  width: 30px;
  height: 24px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 6;
}

.burger {
  width: 2.5rem;
  height: 0.2rem;
  background-color: var(--cyan);
}

.burger::before,
.burger::after {
  content: "";
  position: absolute;
  width: 2.5rem;
  height: 0.2rem;
  background-color: var(--cyan);
  transition: transform 0.3s ease, top 0.3s ease;
}

.burger::before {
  top: 3px;
}

.burger::after {
  top: 19px;
}

.menu-toggle.active .burger {
  background-color: transparent;
}

.menu-toggle.active .burger::before {
  top: 12px;
  transform: rotate(45deg);
}

.menu-toggle.active .burger::after {
  top: 12px;
  transform: rotate(-45deg);
}

.mobile-nav-container {
  z-index: 5;
  position: fixed;
  left: -100%;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: var(--darker-navy);
  padding: 2rem;
  transition: left 0.3s ease;
}

.menu-toggle.active ~ .mobile-nav-container {
  left: 0;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  font-family: karla, sans-serif;
  align-items: center;
  gap: 2.5rem;
  margin-top: 10rem;
}

.mobile-nav-link:link,
.mobile-nav-link:visited {
  display: inline-block;
  text-decoration: none;
  color: var(--slate);
  font-weight: 500;
  font-size: 1.8rem;
  transition: all 0.3s;
}
.mobile-nav-link:hover,
.mobile-nav-link:active {
  color: var(--cyan);
}

/**************************/
/* FORM */
/**************************/
.form-group {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
}

input,
textarea {
  background-color: var(--darker-navy);
  padding: 1rem 1rem;
  border: 0.2rem solid var(--navy);
  border-radius: 0.8rem;
  font-family: NTR, sans-serif;
  font-size: 1.5rem;
  -webkit-transition: 0.3s;
  transition: 0.3s;
  color: white;
  width: 100%;
}

input::placeholder, ::placeholder {
  color: var(--dark-slate) !important;
}

input:focus,
textarea:focus {
  outline: none;
  border: 0.2rem solid var(--light-navy);
}

/**************************/
/* FOOTER */
/**************************/
.section-footer {
  padding: 4rem 5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  font-family: NTR, sans-serif;
  font-size: 1.5rem;
  line-height: 1.7rem;
  color: var(--dark-slate);
}

@media (max-width: 768px) {
  .section-footer {
    font-size: 1.4rem;
    gap: 0.6rem;
    padding: 3rem 1rem;
  }
}