/* GLOBAL */

@font-face {
  font-family: 'Inter';
  src: url('/assets/fonts/Inter-Regular.woff2') format('woff2');
  font-display: swap;
}

:root {
  --body: #1c1c1f;
  --hero: #1c1c1f;
  --black: #020202;
  --white: #f0f0f0;
  --footer: #0a0d18;
  --accent-color: #f2a71d;
  --checked: #8acf82;

  --border-radius: 1rem;

  --primary-font: 'Inter', sans-serif;
  --secondary-font: system-ui, sans-serif;
}

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

html {
  font-size: 100%;
}

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

a {
  color: var(--accent-color);
  font-weight: 500;
  text-decoration: none;
}

button {
  cursor: pointer;
}

button:hover {
  opacity: 0.85;
}

button,
input,
textarea,
select {
  font-size: inherit;
  font-family: inherit;
  border: none;
  letter-spacing: 0.025em;
}

img {
  display: block;
}

h1,
h2,
h3 {
  text-wrap: balance;
}

p {
  text-wrap: pretty;
  line-height: 1.4;
  letter-spacing: 0.025em;
}

/* HERO */

.hero-section {
  background-color: var(--hero);
  padding: 6rem 2.5rem 0;
}

.hero-section .container {
  max-width: 43.75rem;
  margin: 0 auto;
  position: relative;
}

.page-back-btn {
  display: inline-block;
  border-radius: var(--border-radius);
  border: 2px solid var(--accent-color);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 4rem;
  transition: opacity .3s;
}

.page-back-btn:hover {
  opacity: 0.85;
}

.page-back-btn svg {
  width: 1.625rem;
  height: 1.625rem;
  fill: var(--accent-color);
  vertical-align: middle;
  transition: transform .4s;
}

.page-back-btn:hover svg {
  transform: translateX(-0.4rem);
}

.hero-title {
  font-size: 3.75rem;
  line-height: 1.1;
}

.progress-container {
  position: fixed;
  top: 0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 43.75rem;
  height: 2rem;
  overflow: hidden;
  background-color: #ddd;
  border-radius: 0.5rem;
  z-index: 2;
}

.progress-bar {
  width: 0%;
  height: 100%;
  border-radius: 0.5rem;
  transition: width 0.3s ease-in-out;
}

.number-of-items {
  font-size: 1rem;
  font-weight: 600;
  color: var(--black);
  white-space: nowrap;
  position: absolute;
  top: 0.35rem;
  left: 0.5rem;
}

.progress-percentage {
  font-size: 1rem;
  font-weight: 600;
  color: var(--black);
  white-space: nowrap;
  position: absolute;
  top: 0.35rem;
  right: 0.5rem;
}

/* CHECK LIST */

.check-list-section {
  padding: 5rem 2.5rem;
}

.check-list-section .container {
  max-width: 43.75rem;
  margin: 0 auto;
}

.check-list-title {
  font-size: 1.5rem;
  font-weight: 500;
  opacity: 0.9;
  margin-bottom: 3.75rem;
}

ul {
  list-style-type: none;
}

li {
  line-height: 1.4;
  letter-spacing: 0.025em;
  font-size: 1.25rem;
  font-weight: 300;
  font-family: var(--secondary-font);
  opacity: 0.85;
}

li {
  margin-bottom: 2.5rem;
}

li span {
  font-weight: 500;
}

.checkbox {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.checkbox {
  position: relative;
  width: 1.875rem;
  height: 1.875rem;
  background-color: var(--white);
  border-radius: 0.3rem;
  cursor: pointer;
  margin-right: 0.3rem;
  transform: translateY(3px);
}

.checkbox:checked {
  background-color: var(--checked);
}

.checkbox:checked::before {
  content: "✔";
  opacity: 0.8;
  color: var(--black);
  font-size: 1.4rem;
  font-weight: bold;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.url {
  word-break: break-all;
}

.clear-checkboxes-btn {
  border: none;
  display: inline-block;
  position: relative;
  overflow: hidden;
  font-size: 1.125rem;
  font-weight: bold;
  color: var(--black);
  padding: 1.125rem 1.5rem;
  background: var(--accent-color);
  border-radius: var(--border-radius);
  box-shadow: inset 2px 2px 2px 0px rgba(255, 255, 255, .5), 7px 7px 20px 0px rgba(0, 0, 0, .1), 4px 4px 5px 0px rgba(0, 0, 0, .1);
  width: 100%;
  transition: opacity 0.3s;
}

.clear-checkboxes-btn:hover {
  opacity: 0.85;
}

.clear-checkboxes-btn:active {
  top: 2px;
}

/* FOOTER */

.footer {
  background-color: var(--footer);
  padding: 5rem 2.5rem;
  position: relative;
}

.back-to-top-button {
  border: none;
  background: none;
  position: absolute;
  top: -2rem;
  left: 50%;
  transform: translateX(-50%);
}

.back-to-top-button svg {
  width: 4rem;
  height: 4rem;
  fill: #eee;
  filter: drop-shadow(0 5px 10px rgba(255, 208, 0, 0.15))
}

.footer .container {
  max-width: 43.75rem;
  margin: 0 auto;
}

.footer p {
  font-family: var(--secondary-font);
  font-size: 1.125rem;
  font-weight: 300;
  text-align: center;
  opacity: 0.85;
  margin-bottom: 1.25rem;
}

.footer .icons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}

.footer a {
  color: var(--white);
  opacity: 0.8;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0.2rem;
  transition: color 0.4s;
}

.footer a:hover {
  color: var(--accent-color);
}

.github-icon,
.linkedin-icon,
.website-icon {
  width: 2rem;
  height: 2rem;
}

/* RESPONSIVE */

/* 576px */
@media (max-width: 36rem) {
  button:hover {
    opacity: 1;
  }

  .page-back-btn {
    margin-bottom: 2rem;
  }

  .hero-section {
    padding: 5rem 1.25rem 0;
  }

  .check-list-section {
    padding: 2.5rem 1.25rem;
  }

  li {
    font-size: 1.125rem;
  }

  .checkbox {
    width: 1.5rem;
    height: 1.5rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .check-list-title {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
  }

  .clear-checkboxes-btn:hover {
    opacity: 1;
  }

  .footer {
    margin-top: 2rem;
    padding: 2.5rem 1.25rem;
  }

  .footer p {
    margin-top: 1rem;
    font-size: 1rem;
  }

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

/* 320px */
@media (max-width: 36rem) {
  .hero-title {
    font-size: 1.875rem;
  }
}