:root {
  --clr-very-dark-blue: hsl(243, 87%, 12%);
  --clr-desaturated-blue: hsl(238, 22%, 44%);
  --clr-bright-blue: hsl(224, 93%, 58%);
  --clr-moderate-cyan: hsl(170, 45%, 43%);
  --clr-light-grayish-blue: hsl(240, 80%, 98%);
  --clr-light-gray: hsl(0, 0%, 75%);
  --clr-white: hsl(0, 0%, 100%);

  --ff-default: "Open Sans", sans-serif;
  --ff-secondary: "Raleway", sans-serif;

  --fw-400: 400;
  --fw-700: 700;
}

body {
  font-family: var(--ff-default);
  font-weight: var(--fw-400);
  font-size: 0.875rem;
  color: var(--clr-very-dark-blue);
}

/* Helper classes */

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

/* Text styles */

a {
  text-decoration: none;
  color: var(--clr-very-dark-blue);
}

.section-title,
.user-info-name {
  font-family: var(--ff-secondary);
  font-weight: var(--fw-700);
}

.hero .section-title {
  font-size: 1.5rem;
}

.features .section-title,
.call-to-action .section-title {
  font-size: 1.125rem;
  text-align: center;
}

button {
  font-family: var(--ff-secondary);
  font-weight: var(--fw-700);
  color: var(--clr-light-grayish-blue);
}

input {
  font-size: var(--ff-secondary);
}

.card-text {
  font-size: 0.75rem;
}

.user-info-name {
  font-size: 0.75rem;
}

.user-info-stats {
  font-size: 0.5rem;
}

.cta-form input,
.cta-form button {
  font-size: 0.75rem;
}

/* General styles */

.wrapper {
  max-width: 425px;
  margin: 0 auto;
}

.header,
section,
.footer {
  padding: 2rem;
}

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

.header-logo {
  max-width: 5rem;
}

.header .nav-list {
  list-style: none;
  column-gap: 1.5rem;
}

.hero,
.features {
  flex-direction: column-reverse;
  gap: 2.5rem;
}

.hero-content,
.features-content {
  text-align: center;
}

.hero .description {
  margin: 1rem 0 1.75rem;
}

.hero-form {
  padding: 0 0.75rem;
}

button {
  padding: 0.6rem 2rem;
  border: none;
  background-color: var(--clr-bright-blue);
}

input {
  border: 1px solid var(--clr-very-dark-blue);
  padding: 0.6rem;
  margin-bottom: 1rem;
}

form > * {
  display: block;
  min-width: 100%;
  border-radius: 0.2rem;
}

.bg-features {
  background-image: url(../images/bg-curve-mobile.svg);
  background-repeat: no-repeat;
  padding-top: 3rem;
  margin-top: 2rem;
}

.features {
  background-color: var(--clr-light-grayish-blue);
  padding-right: 1.5rem;
  padding-left: 1.5rem;
}

.features-content {
  margin-top: 3rem;
}

.features .description:first-of-type {
  margin: 1.5rem 0 1rem;
}

.features .description,
.card {
  text-align: left;
}

.features-link {
  display: inline-flex;
  color: var(--clr-moderate-cyan);
  column-gap: 0.5rem;
  border-bottom: 1px solid var(--clr-moderate-cyan);
  margin: 2rem 0;
}

.card {
  background-color: var(--clr-white);
  border-radius: 0.25rem;
  box-shadow: rgba(0, 0, 0, 0.24) 0px 3px 8px;
  margin: 0.75rem;
  padding: 1.5rem 0.75rem 1.5rem 1.5rem;
}

.card::before {
  content: url(../images/icon-quotes.svg);
}

.card-text {
  margin: 0.25rem 0 0.75rem;
}

.card .user-image {
  max-width: 2rem;
  overflow: hidden;
  border-radius: 50%;
}

.card-user {
  column-gap: 0.5rem;
}

.call-to-action {
  background-color: var(--clr-desaturated-blue);
  color: var(--clr-light-grayish-blue);
  text-align: center;
  padding: 3rem;
}

.call-to-action .description {
  margin: 1rem 0 1.5rem;
}

.cta-form {
  padding: 0 1.5rem;
}

.cta-form input {
  border: none;
  margin-bottom: 0.5rem;
}

.footer {
  background-color: var(--clr-very-dark-blue);
  color: var(--clr-light-grayish-blue);
  flex-direction: column;
  align-items: flex-start;
  gap: 2.5rem;
  padding-top: 3rem;
}

.contact-info {
  column-gap: 0.625rem;
}

.contact-info:first-of-type {
  margin-bottom: 1rem;
}

.footer-nav {
  list-style: none;
}

.footer-nav:first-of-type {
  margin-bottom: 2rem;
}

.footer-nav-item {
  margin-bottom: 1rem;
}

@media (min-width: 376px) {
  .bg-features {
    background-image: url(../images/bg-curve-desktop.svg);
    background-position: top center;
  }
}

@media (min-width: 750px) {
  .hero,
  .features {
    flex-direction: row;
  }

  .hero-content,
  .features-content {
    text-align: left;
  }

  .hero-form {
    padding: 0;
  }

  .call-to-action {
    display: flex;
    align-items: center;
    text-align: left;
    gap: 2rem;
  }

  .features .section-title,
  .call-to-action .section-title {
    text-align: left;
  }

  .bg-features {
    padding-top: 5rem;
  }

  .card {
    max-width: 17.5rem;
    margin: 0;
  }

  .cta-section {
    flex: 1;
  }

  .cta-form {
    flex: 1;
    padding: 0;
  }

  .cta-form button {
    min-width: auto;
  }

  .footer {
    gap: 1rem;
  }

  .footer-content {
    min-width: 80%;
    align-items: flex-start;
    justify-content: space-between;
  }

  .footer-col {
    flex: 1;
  }

  .footer-col nav {
    align-items: flex-start;
    justify-content: space-between;
  }
}

@media (min-width: 980px) {
  .header,
  section,
  .features,
  .footer {
    padding: 3rem;
  }

  .header-logo {
    max-width: 120px;
  }

  .hero .section-title {
    font-size: 1.75rem;
  }

  .features .section-title {
    font-size: 1.25rem;
  }

  .call-to-action {
    gap: 6rem;
  }

  .call-to-action .section-title {
    font-size: 1.5rem;
  }

  .hero-form {
    display: flex;
    gap: 1rem;
  }

  .hero-form input {
    margin: 0;
    min-width: 60%;
  }

  .hero-form button {
    min-width: auto;
  }
}

@media (min-width: 1200px) {
  body {
    font-size: 1rem;
  }

  .hero .section-title {
    font-size: 2.2rem;
  }

  .features .section-title,
  .call-to-action .section-title {
    font-size: 1.75rem;
  }

  .header,
  section,
  .features,
  .call-to-action,
  .footer {
    padding: 4rem;
  }

  .header-logo {
    max-width: 146px;
  }

  .call-to-action {
    justify-content: space-between;
  }

  .cta-section {
    max-width: 46%;
  }

  .cta-form {
    max-width: 40%;
  }

  .footer-content {
    min-width: 65%;
  }
}