:root {
  --clr-cyan: #2bd0d0;
  --clr-cyan-light: #9ae3e3;
  --clr-dark-violet: #3a3054;

  --clr-red: #f46363;

  --clr-gray: #bfbfbf;
  --clr-gray-violet: #9e9aa7;
  --clr-very-dark-blue: #35323e;
  --clr-very-dark-vio: #232127;
  --clr-off-white: #eff1f7;
  --clr-white: #ffffff;

  --radius-pill: 999px;
  --radius-md: 8px;
  --radius-sm: 5px;
  --shadow-card: 0 10px 25px -10px rgba(0, 0, 0, 0.08);

  --container-max: 1110px;
  --transition-fast: 150ms ease;
  --transition-med: 250ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Poppins", sans-serif;
  font-size: 18px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--clr-gray-violet);
  background-color: var(--clr-white);
  overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
  color: var(--clr-very-dark-blue);
  font-weight: 700;
  line-height: 1.2;
  margin: 0;
}

p {
  margin: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: 0;
}

input {
  font-family: inherit;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  width: 100%;
}

.btn {
  display: inline-block;
  border-radius: var(--radius-pill);
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast);
  padding: 12px 32px;
  font-size: 15px;
  line-height: 1.5;
}

.btn-primary-cyan {
  background-color: var(--clr-cyan);
  color: var(--clr-white);
}
.btn-primary-cyan:hover,
.btn-primary-cyan:focus-visible {
  background-color: var(--clr-cyan-light);
  color: var(--clr-white);
}

.btn-lg-cta {
  padding: 14px 40px;
  font-size: 18px;
}

.site-header {
  padding-top: 28px;
  padding-bottom: 28px;
  background: var(--clr-white);
  position: relative;
  z-index: 20;
}

.navbar-custom {
  display: flex;
  align-items: center;
  gap: 40px;
}

.brand img {
  height: 33px;
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  padding: 0;
  margin-left: auto;
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 3px;
  background: var(--clr-gray-violet);
  border-radius: 2px;
  transition:
    transform var(--transition-med),
    opacity var(--transition-med);
}

.nav-collapse {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 24px;
  right: 24px;
  background: var(--clr-dark-violet);
  border-radius: 10px;
  padding: 40px 24px;
  text-align: center;
  flex-direction: column;
  gap: 24px;
  z-index: 30;
}

.nav-collapse.is-open {
  display: flex;
}

.nav-links,
.nav-auth {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.nav-links a,
.nav-login {
  color: var(--clr-white);
  font-weight: 700;
  font-size: 18px;
}
.nav-links a:hover,
.nav-login:hover {
  color: var(--clr-cyan);
}

.nav-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  width: 100%;
}

.nav-signup {
  width: 100%;
  padding: 12px 24px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

.hero {
  padding: 32px 0 160px;
  background: var(--clr-white);
  position: relative;
  overflow: hidden;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  text-align: center;
}

.hero__art {
  order: -1;
  margin-right: -24px;
}

.hero__illustration {
  width: 100%;
  min-width: 360px;
  height: auto;
  margin-left: auto;
}

.hero__title {
  font-size: 42px;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero__subtitle {
  font-size: 18px;
  color: var(--clr-gray-violet);
  max-width: 540px;
  margin: 0 auto 32px;
}

.features-section {
  background: var(--clr-off-white);
  padding-bottom: 80px;
  position: relative;
}

.shortener {
  background-color: var(--clr-dark-violet);
  background-image: url("images/bg-shorten-mobile.svg");
  background-repeat: no-repeat;
  background-position: top right;
  border-radius: 10px;
  padding: 24px;
  margin-top: -84px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  z-index: 2;
}

.shortener__field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.shortener__input {
  width: 100%;
  padding: 12px 16px;
  border: 3px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 16px;
  color: var(--clr-very-dark-blue);
  background: var(--clr-white);
  outline: none;
  transition: border-color var(--transition-fast);
}

.shortener__input::placeholder {
  color: var(--clr-gray-violet);
}

.shortener__input:focus {
  border-color: var(--clr-cyan);
}

.shortener--error .shortener__input {
  border-color: var(--clr-red);
  color: var(--clr-red);
}
.shortener--error .shortener__input::placeholder {
  color: rgba(244, 99, 99, 0.5);
}

.shortener__error {
  font-size: 12px;
  font-style: italic;
  color: var(--clr-red);
  min-height: 18px;
}

.shortener__submit {
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  width: 100%;
  font-size: 16px;
}

.results {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}

.link-card {
  background: var(--clr-white);
  border-radius: 6px;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  animation: fadeInUp 300ms ease both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.link-card__original {
  color: var(--clr-very-dark-blue);
  font-size: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--clr-off-white);
  word-break: break-all;
}

.link-card__short {
  color: var(--clr-cyan);
  font-size: 16px;
  padding: 12px 0 16px;
  word-break: break-all;
}

.link-card__copy {
  background: var(--clr-cyan);
  color: var(--clr-white);
  font-weight: 700;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  font-size: 14px;
  width: 100%;
  transition: background-color var(--transition-fast);
}
.link-card__copy:hover,
.link-card__copy:focus-visible {
  background: var(--clr-cyan-light);
}

.link-card__copy.is-copied {
  background: var(--clr-dark-violet);
}
.link-card__copy.is-copied:hover {
  background: var(--clr-dark-violet);
}

.stats-intro {
  text-align: center;
  margin-top: 80px;
  margin-bottom: 80px;
  padding: 0 8px;
}

.stats-intro__title {
  font-size: 28px;
  margin-bottom: 16px;
}

.stats-intro__text {
  font-size: 15px;
  color: var(--clr-gray-violet);
  max-width: 540px;
  margin: 0 auto;
}

.stats-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 88px;
  position: relative;
}

.stats-cards::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 8px;
  background: var(--clr-cyan);
  transform: translateX(-50%);
  z-index: 0;
}

.stat-card {
  background: var(--clr-white);
  border-radius: 6px;
  padding: 72px 32px 32px;
  text-align: center;
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-card);
}

.stat-card__icon {
  position: absolute;
  top: -44px;
  left: 50%;
  transform: translateX(-50%);
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: var(--clr-dark-violet);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-card__icon img {
  width: 40px;
  height: 40px;
}

.stat-card__title {
  font-size: 22px;
  margin-bottom: 16px;
}

.stat-card__text {
  font-size: 15px;
  color: var(--clr-gray-violet);
}

.boost {
  background-color: var(--clr-dark-violet);
  background-image: url("images/bg-boost-mobile.svg");
  background-size: cover;
  background-position: center;
  padding: 56px 24px;
  text-align: center;
}

.boost__title {
  color: var(--clr-white);
  font-size: 28px;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.site-footer {
  background: var(--clr-very-dark-vio);
  color: var(--clr-white);
  padding: 56px 0;
  text-align: center;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  justify-items: center;
}

.footer-brand__logo {
  color: var(--clr-white);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.footer-col__title {
  color: var(--clr-white);
  font-size: 16px;
  margin-bottom: 20px;
  font-weight: 700;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--clr-gray);
  font-size: 15px;
}
.footer-col a:hover {
  color: var(--clr-cyan);
}

.footer-social {
  display: flex;
  gap: 24px;
}

.footer-social a img {
  width: 24px;
  height: 24px;
  transition: filter var(--transition-fast);
}

.footer-social a:hover img {
  filter: brightness(0) saturate(100%) invert(69%) sepia(78%) saturate(370%)
    hue-rotate(131deg) brightness(92%) contrast(87%);
}

@media (min-width: 768px) {
  .hero__title {
    font-size: 56px;
  }
  .hero__subtitle {
    font-size: 20px;
  }

  .shortener {
    flex-direction: row;
    align-items: flex-start;
    gap: 16px;
    padding: 40px 56px;
    background-image: url("images/bg-shorten-desktop.svg");
    background-size: cover;
  }

  .shortener__field {
    flex: 1;
  }

  .shortener__submit {
    width: auto;
    padding: 12px 32px;
    white-space: nowrap;
  }

  .link-card {
    flex-direction: row;
    align-items: center;
    padding: 16px 24px;
    gap: 24px;
  }

  .link-card__original {
    flex: 1;
    border-bottom: 0;
    padding: 0;
  }

  .link-card__short {
    padding: 0;
  }

  .link-card__copy {
    width: auto;
    min-width: 104px;
  }

  .boost {
    background-image: url("images/bg-boost-desktop.svg");
    padding: 64px 24px;
  }

  .boost__title {
    font-size: 36px;
  }
}

@media (min-width: 992px) {
  .nav-toggle {
    display: none;
  }

  .nav-collapse {
    display: flex !important;
    position: static;
    background: transparent;
    padding: 0;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex: 1;
    gap: 40px;
  }

  .nav-links,
  .nav-auth {
    flex-direction: row;
    align-items: center;
    gap: 32px;
  }

  .nav-links a,
  .nav-login {
    color: var(--clr-gray-violet);
    font-size: 15px;
    font-weight: 700;
  }
  .nav-links a:hover,
  .nav-login:hover {
    color: var(--clr-very-dark-blue);
  }

  .nav-divider {
    display: none;
  }

  .nav-links {
    margin-right: auto;
  }

  .nav-signup {
    width: auto;
    padding: 10px 24px;
  }

  .hero {
    padding: 60px 0 200px;
  }

  .hero__grid {
    grid-template-columns: minmax(0, 540px) 1fr;
    text-align: left;
    align-items: center;
    gap: 32px;
  }

  .hero__art {
    order: 0;
    margin-right: calc((100vw - var(--container-max)) / -2);
    overflow: visible;
  }

  .hero__illustration {
    width: 100%;
    max-width: none;
    margin-left: 0;
    transform: translateX(40px);
  }

  .hero__title {
    font-size: 72px;
    letter-spacing: -2px;
  }

  .hero__subtitle {
    margin-left: 0;
    margin-right: 0;
  }

  .btn-lg-cta {
    padding: 16px 40px;
  }

  .stats-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    align-items: start;
  }

  .stats-cards::before {
    top: 50%;
    bottom: auto;
    left: 0;
    right: 0;
    height: 8px;
    width: auto;
    transform: translateY(-50%);
  }

  .stat-card {
    text-align: left;
    padding: 72px 32px 40px;
  }

  .stat-card__icon {
    left: 32px;
    transform: none;
  }

  .stat-card--2 {
    margin-top: 40px;
  }
  .stat-card--3 {
    margin-top: 80px;
  }

  .footer-grid {
    grid-template-columns: 1.2fr repeat(3, 1fr) 1.2fr;
    align-items: start;
    justify-items: start;
    text-align: left;
    gap: 32px;
  }

  .footer-col ul {
    text-align: left;
  }
  .footer-social {
    justify-self: end;
  }

  .boost__title {
    font-size: 40px;
  }
}

@media (min-width: 1200px) {
  .hero__illustration {
    transform: translateX(80px);
  }
}