:root {
  --gray-900: #151916;
  --gray-750: #2F2F2F;
  --medium-gray: #C3C7C3;
  --gray-300: #CBD5CB;
  --off-white: #F8FEF2;
  --off-black: #000700;
  --green-800: #001901;
  --green-brand: #2DE633;
  
  --txt-color-primary: var(--off-white);
  --txt-color-secondary: var(--off-black);
  --txt-body-color: var(--medium-gray);
  --txt-brand-color: var(--green-brand);
  --bg-color: var(--gray-900);
  --foreground-color: var(--gray-300);
  --surface-color: var(--gray-750);
  --border-color: var(--gray-750);
  
  --font-montserrat: 'Montserrat', ui-system, sans-serif;
  --font-inter: 'Inter', ui-sytem, sans-serif;
  
  --fs-hero: clamp(2rem, 1.09rem + 4.55vw, 4rem);
  --fs-title: clamp(1.5rem, 1.05rem + 2.27vw, 2.5rem);
  --fs-subtitle: clamp(1.25rem, 1.14rem + 0.57vw, 1.5rem);
  --fs-body: clamp(1rem, 0.94rem + 0.28vw, 1.125rem);
  --fs-small: clamp(0.875rem, 0.82rem + 0.28vw, 1rem);
}

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

@media (prefers-reduced-motion: no-preference) {
  html {
    interpolate-size: allow-keywords;
  }
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

p, h1, h2, h3, h4, h5, h6 {
  font-size: inherit;
  font-weight: inherit;
  overflow-wrap: break-word;
}

p {
  text-wrap: pretty;
  font: 500 var(--fs-body)/125% var(--font-inter);
}

a {
  color: inherit;
  text-decoration: none;
}

ul, summary {
  list-style: none;
}

summary {
  cursor: pointer;
}

/* Utility */

.desktop-only {
  display: none;
  
  @media (width >= 44em) {
    display: initial;
  }
}

.mobile-only {
  @media (width >= 44em) {
    display: none;
  }
}

.even-columns {
  @media (width >= 44em) {
    grid-template-columns: 1fr 1fr;
  }
}

.container-lg {
  width: min(100% - clamp(3rem, 6vw, 4rem), 78rem);
  margin-inline: auto;
}

.container-sm {
  width: min(100% - clamp(3rem, 6vw, 5rem), 67.5rem);
  margin-inline: auto;
}

.px-sm {
  padding-block: clamp(0.75rem, 3vw, 1.5rem);
}

:root {
 --px-lg: clamp(2.5rem, 3vw, 4rem); 
}

.grid {
  display: grid;
}

.flex {
  display: flex;
}

.justify-center {
  justify-content: center;
}

.text-center {
  text-align: center;
}

.items-center {
  align-items: center;
}

.content-center {
  place-content: center;
}

.gap-1 {
  gap: 1rem;
}

.gap-2 {
  gap: 2rem;
}

.gap-0\.5 {
  gap: 0.5rem;
}

/* Styles */

body {
  font-family: var(--font-inter);
  color: var(--txt-color-primary);
  background-color: var(--bg-color);
}

#hero {
  position: relative;
  border-radius: 0 0 0.5rem 0.5rem;
  background: url(assets/images/bg-hero.webp) no-repeat fixed;
  background-position: 50% 50%;
  background-size: cover;
}

header {
  width: 100%;
  position: fixed;
  top: 0;
  z-index: 1;
  background-color: rgba(0, 25, 1, 10%);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.header__navbar {
  justify-content: space-between;
}

.header__logo {
  width: 1.875rem;
  height: auto;
  transition: all 120ms ease-in-out;
  
  &:hover {
    scale: 1.2;
  }
}

.header-link {
  position: relative;
  font: 600 var(--fs-small)/125% var(--font-montserrat);
  color: var(--txt-color-primary);
  transition: all 120ms ease-in-out;
  
  &::after {
   content: ''; 
   height: 2px;
   width: 100%;
   position: absolute;
   left: 0;
   bottom: -0.2rem;
   background-color: var(--txt-body-color);
   
   transform: scaleX(0);
   transition: all 120ms ease-in-out;
  }
  
  &:hover {
    color: var(--txt-body-color);
  }
  
  &:hover::after {
    transform: scaleX(1);
  }
}

.btn-hero {
  & > span {
    display: none;
  }
}

.cta__btn {
  max-width: fit-content;
  font: 700 var(--fs-small)/125% var(--font-montserrat);
  color: var(--green-800);
  padding: 0.375rem 0.5rem;
  border-radius: 0.25rem;
  box-shadow: 0.25rem 0.25rem 0 var(--green-800);
  background-color: var(--green-brand);
  transition: all 120ms ease;
  
  @media (width >= 44em) {
    & > span {
      display: inline-block;
    }
  }
  
  &:hover {
    translate: 0 -0.2rem;
    box-shadow: 0.25rem 0.25rem 0.31rem var(--green-800);
    outline: 0.125rem solid var(--green-800);

    & span {
      text-decoration: underline 2px var(--green-800);
    }
  }
}

/* ---------------------- */

.hero__content {
  padding-block: 9.37rem var(--px-lg);
}

.hero-container {
  gap: clamp(4rem, 5vw, 15rem); 
}

h1 {
  font: 800 var(--fs-hero)/125% var(--font-montserrat);
  text-transform: uppercase;
  max-width: 23ch;
  
  & > span {
    color: var(--txt-brand-color);
  }
}

.hero-subtitle {
  font: 600 var(--fs-subtitle)/125% var(--font-inter);
}

.hero-cta {
  max-width: fit-content;
}


#security {
  position: relative;
  padding-block: var(--px-lg) 7rem;
  
  @media (width >= 44em) {
    & {
     padding-block: var(--px-lg); 
    }
  }
}

.security__container {
  place-content: center;
}

.security-span {
  font: 600 var(--fs-body)/125% var(--font-inter);
  color: var(--txt-brand-color);
}

.security__title {
  font: 800 var(--fs-title)/125% var(--font-montserrat);
}

.security__context {
  font: 500 var(--fs-body)/125% var(--font-inter);
  color: var(--txt-body-color);
}

.mobile-img-container {
  max-width: 21.8rem;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
  transform: translate(-50%, 50%);
}

.desktop-img-container {
  height: 100%;
  width: auto;
}


#social {
  padding-block: 7.5rem var(--px-lg);
  @media (width >= 44em) {
    & {
     padding-block: var(--px-lg); 
    }
  }
  
  background-color: var(--foreground-color);
}



.social__title {
  font: 800 var(--fs-title)/125% var(--font-montserrat);
  color: var(--off-black);
}

.social-card {
  max-width: 34.30rem;
  padding: 1.5rem;
  border: var(--surface-color);
  border-radius: 0.375rem;
  background-color: var(--bg-color);
  
  & .card-header {
    justify-content: space-between;
    
    & > img {
      min-width: 2rem;
    }
  }
  
  & span {
    font: 500 var(--fs-small)/125% var(--font-inter);
    color: var(--txt-body-color);
    text-decoration: underline var(--txt-body-color);
  }
  
  & h3 {
   font: 800 var(--fs-title)/125% var(--font-montserrat); 
  }
  
  & p {
    font: 500 var(--fs-body)/125% var(--font-inter);
    color: var(--txt-body-color);
  }
}

#faq {
  padding-block: var(--px-lg);
}

.faq__title {
  font: 700 var(--fs-subtitle) var(--font-montserrat);
  color: var(--txt-brand-color);
}

summary {
  font: 700 var(--fs-body)/125% var(--font-montserrat);
}

.response {
  margin-top: 0.75rem;
  font: 500 var(--fs-body)/125% var(--font-inter);
  color: var(--txt-body-color);
  padding: 12px 16px;
  border-radius: 0.5rem;
  background-color: var(--surface-color);
}

.faqs > li {
  padding: 1rem;
}

.faqs hr {
  background-color: var(--surface-color);
}

footer {
  border-radius: 8px 8px 0 0;
  border-top: 1px solid var(--surface-color);
}