:root {
    /* COLORS */
    --bright-yellow-crayola: hsl(40, 100%, 50%);
    --medium-turquoise: hsl(172, 48%, 59%);
    --silver-chalice: hsl(0, 0%, 70%);
    --eerie-black-1: hsl(0, 0%, 13%);
    --eerie-black-2: hsl(0, 0%, 15%);
    --eerie-black-3: hsl(228, 10%, 10%);
    --raisin-black: hsl(220, 8%, 14%);
    --granite-gray: hsl(0, 0%, 38%);
    --sonic-silver: hsl(0, 0%, 47%);
    --pistachio_50: hsla(86, 45%, 54%, 0.5);
    --baby-powder: hsl(86, 41%, 97%);
    --light-gray: hsl(0, 0%, 80%);
    --pistachio: hsl(86, 45%, 54%);
    --platinum: hsl(0, 0%, 91%);
    --cultured: hsl(0, 0%, 94%);
    --white-60: hsla(0, 0%, 100%, 0.6);
    --white_50: hsla(0, 0%, 100%, 0.5);
    --white_10: hsla(0, 0%, 100%, 0.1);
    --white: hsl(0, 0%, 100%);
    --black: hsl(0, 0%, 0%);
    --jet: hsl(0, 0%, 18%);

    /* TYPOGRAPHY */
    --ff-oswald: 'Oswald', sans-serif;
    --ff-inter: 'Inter', sans-serif;
    --ff-roboto: 'Roboto', sans-serif;

    --fs-1: 13rem;
    --fs-2: 4rem;
    --fs-3: 3.5rem;
    --fs-4: 3rem;
    --fs-5: 2.4rem;
    --fs-6: 2.2rem;
    --fs-7: 2rem;
    --fs-8: 1.8rem;
    --fs-9: 1.5rem;
    --fs-10: 1.4rem;

    --fw-300: 300;
    --fw-500: 500;
    --fw-600: 600;
    --fw-700: 700;

    /* SPACING */
    --section-padding: 80px;

    /* SHADOW */
    --card-shadow: 0 5px 20px -8px hsla(0, 0%, 0%, 0.15);

    /* TRANSITION */
    --transition-1: 0.05s ease;
    --transition-2: 0.25s ease;
    --cubic-in: cubic-bezier(0.51, 0.03, 0.64, 0.28);
    --cubic-out: cubic-bezier(0.33, 0.85, 0.4, 0.96);
}

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

li {
    list-style: none;
}

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

a,
img,
span,
time,
input,
strong,
button,
ion-icon {
     display: block; 
}

img {
    height: auto;
}

ion-icon {
    pointer-events: none;
}

input,
button {
  background: none;
  border: none;
  font: inherit;
}

input { 
    width: 100%; 
}

button { 
    cursor: pointer; 
}

:focus-visible { 
    outline-offset: 4px; 
}

::selection { 
    background-color: var(--white_10); 
}

html {
  font-family: var(--ff-roboto);
  color: var(--granite-gray);
  font-size: 10px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--white);
  font-size: 1.6rem;
  line-height: 1.8;
  overflow-x: hidden;
}

::-webkit-scrollbar { 
    width: 13px; 
}

::-webkit-scrollbar-track { 
    background-color: hsl(0, 0%, 95%); 
}

::-webkit-scrollbar-thumb { 
    background-color: var(--pistachio); 
}

.navbar,
.header-action {
    display: none;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: transparent;  
    padding-block: 18px;
    z-index: 4;
}

.header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100%-140px);
    height: 1px;
    background-color: var(--white_10);
}

.header.active {
    background-color: var(--eerie-black-1);
    box-shadow: 0 0 10 hsla(0, 0%, 0%, 0.8);
}

.header.active::after {
    display: none;
}