/* 
    --- Typography System(px) ---
  10px / 12px / 14px / 16px / 18px / 20px / 24px / 30px / 36px / 44px / 52px / 62px / 74px / 86px / 98px

   --- Spacing System(px) ---
  2px / 4px / 8px / 12px / 16px  / 24px / 32px / 48px / 64px / 80px / 96px / 128px
*/

:root {
  /* Colors */
  --Blue-600: hsl(231, 69%, 60%);
  --Red-400: hsl(0, 94%, 66%);
  --Grey-50: hsl(0, 0%, 97%);
  --Blue-950: hsl(229, 31%, 21%);

  --ff-rubik: "Rubik", sans-serif;
  --fw-400: 400;
  --fw-500: 500;
}

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

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-size: 1.8rem;
  font-family: var(--ff-rubik);
  font-weight: var(--fw-400);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: #fff;
}

/* ===== TYPOGRAPHY ===== */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 500;
  line-height: 1.1;
  text-wrap: balance;
}

p,
li {
  text-wrap: pretty;
  max-width: 65ch;
}

/* ===== LISTS ===== */

ul,
ol {
  list-style: none;
}

/* ===== MEDIA ===== */

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

/* ===== FORMS & INTERACTIVE ===== */

input,
button,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

/* ===== ACCESSIBILITY ===== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

:focus-visible {
  outline: 3px solid hsl(231, 69%, 60%);
  outline-offset: 3px;
}

.header {
  max-width: 104rem;
  margin: 0 auto;
  padding: 0 2.4rem;
  position: relative;
  z-index: 100;
}

.nav {
  padding: 2.4rem 0;

  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo-img {
  height: 2.4rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.4rem;
}

.nav-links a:not(.btn) {
  font-size: 1.4rem;
  font-weight: var(--fw-400);
  color: var(--Blue-950);
  text-transform: uppercase;
  transition: color 0.3s ease;
}

.nav-links a:not(.btn):hover {
  color: var(--Red-400);
}

.btn {
  display: inline-block;
  padding: 1rem 2.2rem;
  border-radius: 0.5rem;

  font-size: 1.4rem;
  font-weight: var(--fw-500);

  cursor: pointer;
  transition: all 0.3s ease;
}

.btn--primary {
  background-color: var(--Red-400);
  color: #fff;
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
  transition: background-color 0.3s ease;
}

.btn--primary:hover,
.btn--primary:focus {
  background-color: #fff;
  color: var(--Red-400);
  outline: 2px solid var(--Red-400);
}

.hero {
  padding: 6.4rem 0;
  overflow: hidden;
}

.hero__container {
  max-width: 104rem;
  margin: 0 auto;

  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 3.2rem;
}

.hero__title {
  font-size: 4.4rem;
  text-wrap: balance;
  line-height: 1.1;
  color: var(--Blue-950);
  font-weight: var(--fw-500);
  margin-bottom: 2.4rem;
}

.hero__text {
  font-size: 1.6rem;
  color: hsl(229, 8%, 60%);
  margin-bottom: 2.4rem;
}

.hero__buttons {
  display: flex;
  gap: 1.6rem;
}

.hero__image-box {
  position: relative;
  transform: translateX(6rem);
}

.hero__image-box::before {
  content: "";
  position: absolute;

  right: -40%;
  bottom: -10%;

  width: 110%;
  height: 80%;

  background-color: var(--Blue-600);

  border-bottom-left-radius: 10rem;
  border-top-left-radius: 10rem;

  z-index: -1;
}

.btn--blue {
  background-color: var(--Blue-600);
  color: #fff;

  box-shadow: 0 0.8rem 1.5rem rgba(83, 104, 223, 0.3);
}

.btn--blue:hover {
  background-color: #fff;
  color: var(--Blue-600);
  outline: 2px solid var(--Blue-600);
}

.btn--light {
  background-color: var(--Grey-50);
  color: var(--Blue-950);

  box-shadow: 0 0.8rem 1.5rem rgba(0, 0, 0, 0.08);
}

.btn--light:hover {
  background-color: #fff;
  outline: 2px solid var(--Blue-950);
}

/* 
  Feature section
*/

.feature-container {
  max-width: 104rem;
  margin: 0 auto;
  padding: 6.4rem 0;
}

.features-content {
  text-align: center;
  width: 100%;
}

.features-content h2 {
  font-size: 3.6rem;
  color: var(--Blue-950);
  margin-bottom: 1.6rem;
}

.features-content p {
  color: hsl(229, 8%, 60%);
  font-size: 1.6rem;
  margin: 0 auto 3.2rem auto;
  max-width: 48ch;
}

.tabs__buttons {
  display: flex;
  justify-content: center;
  max-width: 80rem;
  margin: 0 auto;
  font-weight: var(--fw-500);

  border-bottom: 1px solid hsla(228, 7%, 70%, 0.719);
  margin-bottom: 4.8rem;
}

.tabs__btn {
  flex: 1;
  padding: 1.6rem 0;
  font-size: 1.6rem;
  color: hsl(229, 8%, 60%);
  position: relative;
  transition: color 0.3s ease;
}

.tabs__btn:hover {
  color: var(--Red-400);
}

.tabs__btn--active {
  color: var(--Blue-950);
}

.tabs__btn--active::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--Red-400);
}

.tabs__panel {
  display: none;
}

.tabs__panel--active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 9.6rem;
}

.tabs__content {
  padding: 3.2rem 0;
}

.tab-image {
  position: relative;
}

.tab-image::before {
  content: "";
  position: absolute;

  left: -20%;
  bottom: -20%;

  width: 110%;
  height: 80%;

  background-color: var(--Blue-600);

  border-bottom-right-radius: 10rem;
  border-top-right-radius: 10rem;

  z-index: -1;
}

.tab-text h2 {
  font-size: 3.2rem;
  color: var(--Blue-950);
  margin-bottom: 1.6rem;
}

.tab-text p {
  color: hsl(229, 8%, 60%);
  font-size: 1.6rem;
  margin-bottom: 2.4rem;
  max-width: 40ch;
}

.extension-container {
  max-width: 104rem;
  margin: 0 auto;
  padding: 6.4rem 0;
}

.extensions-box {
  display: grid;
  gap: 3.2rem;
  grid-template-columns: repeat(3, 1fr);
  align-items: start;
  padding: 2.4rem 0;
  max-width: 80rem;
  margin: 0 auto;
}

.extension {
  background: #fff;
  border-radius: 1.2rem;
  padding: 3.2rem 1.6rem;
  text-align: center;
  box-shadow: 0 5rem 3rem rgba(0, 0, 0, 0.08);
  height: 100%;

  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.6rem;
}

.extension--2 {
  transform: translateY(3rem);
}

.extension--3 {
  transform: translateY(6rem);
}

.extension h3 {
  font-size: 1.8rem;
  color: var(--Blue-950);
}

.extension p {
  color: hsl(229, 8%, 60%);
  font-size: 1.4rem;
  margin-top: -1rem;
}

.extension img:first-child {
  width: 8rem;
  height: auto;
  margin-bottom: 0.8rem;
}

.extension img:nth-of-type(2) {
  width: 100%;
}

/* 
  FAQ Section
*/

.faq-container {
  max-width: 104rem;
  margin: 0 auto;
  padding: 6.4rem 0;
}

.faq-container .btn {
  display: block;
  margin: 3.2rem auto 0 auto;
}

.faq {
  max-width: 60rem;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid hsl(229, 8%, 85%);
  padding: 1.6rem 0;
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--Blue-950);
  transition: color 0.3s ease;
}

.faq-icon {
  transition: transform 0.3s ease;
}

.faq-question:hover {
  color: var(--Red-400);
}

.faq-answer {
  display: none;
  margin-top: 1.2rem;
  font-size: 1.5rem;
  color: hsl(229, 8%, 60%);
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  filter: invert(27%) sepia(100%) saturate(700%) hue-rotate(320deg)
    brightness(90%);
}

/* 
  Newsletter Section
*/
.newsletter_section {
  background-color: var(--Blue-600);
}

.newsletter-container {
  max-width: 104rem;
  margin: 0 auto;
  padding: 6.4rem 2.4rem;
  text-align: center;
}

.newsletter-container h6 {
  font-size: 1.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5rem;
  color: #fff;
  margin-bottom: 2.4rem;
}

.newsletter-container h2 {
  color: #fff;
  font-size: 5.2rem;
  max-width: 28ch;
  margin: 0 auto 2.4rem auto;
}

.newsletter-form {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 1.6rem;
}

.input-group {
  position: relative;
  width: 100%;
  max-width: 40rem;
}

.newsletter-input {
  width: 100%;
  padding: 1.2rem 4rem 1.2rem 1.6rem;
  border-radius: 0.5rem;
  border: none;
  outline: none;
}

.error {
  display: none;
  font-size: 1.2rem;
  text-align: start;
  font-style: italic;
  color: #fff;
  background-color: var(--Red-400);
  padding: 0.6rem 1rem;
  border-bottom-left-radius: 0.5rem;
  border-bottom-right-radius: 0.5rem;
}

.input-wrapper {
  position: relative;
}

.error-icon {
  position: absolute;
  right: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  display: none;
}

.newsletter-form input[type="email"]::placeholder {
  color: hsl(229, 8%, 60%);
}

.input-group.error-state .newsletter-input {
  border: 2px solid var(--Red-400);
  border-radius: 0.5rem 0.5rem 0 0;
}

.input-group.error-state .error {
  display: block;
}

.input-group.error-state .error-icon {
  display: block;
}

.contact-btn {
  padding: 1.5rem 3.4rem;
  text-align: center;
}

/* 
  Footer Section
*/
.footer {
  background-color: var(--Blue-950);
  color: #fff;
}

.footer-container {
  max-width: 104rem;
  margin: 0 auto;
  padding: 2.4rem 2.4rem;

  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo-img {
  filter: brightness(0) invert(1);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 2.4rem;
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 2.4rem;
}

.footer-socials a img {
  transition: filter 0.3s ease;
}

.footer-socials a:hover img {
  filter: brightness(0) saturate(100%) invert(27%) sepia(100%) saturate(700%)
    hue-rotate(320deg) brightness(90%);
}

/* 
  Responsive Styles
*/

/* ===========================
   RESPONSIVE
=========================== */

/* ---- 1024px ---- */
@media (max-width: 64rem) {
  .header {
    padding: 0 3.2rem;
  }

  .hero__container {
    padding: 0 2rem;
    gap: 2.4rem;
  }

  .hero__title {
    font-size: 3.6rem;
    width: 100%;
  }

  .hero__image-box {
    margin-bottom: 1.6rem;
  }

  .feature-container,
  .extension-container,
  .faq-container {
    padding: 6.4rem 2rem;
  }

  .tabs__panel--active {
    gap: 4.8rem;
  }
}

/* ---- 768px ---- */
@media (max-width: 48rem) {
  /* NAV */
  .nav-links {
    display: none;
  }

  /* HERO */
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 0 2.4rem;
  }

  .hero__content {
    order: 2;
  }

  .hero__image-box {
    order: 1;
    transform: translateX(3rem);
  }

  .hero__buttons {
    justify-content: center;
  }

  /* FEATURES */
  .tabs__buttons {
    flex-direction: column;
    border-bottom: none;
    max-width: 100%;
  }

  .tabs__btn {
    border-top: 1px solid hsla(228, 7%, 70%, 0.719);
    padding: 1.6rem 0;
    text-align: center;
  }

  .tabs__btn:last-child {
    border-bottom: 1px solid hsla(228, 7%, 70%, 0.719);
  }

  .tabs__btn--active::after {
    bottom: 0;
  }

  .tabs__panel--active {
    grid-template-columns: 1fr;
    gap: 4.8rem;
    text-align: center;
  }

  .tab-text p {
    max-width: 100%;
    margin: 0 auto 2.4rem auto;
  }

  .tab-image::before {
    left: -10%;
    bottom: -10%;
  }

  /* EXTENSIONS */
  .extensions-box {
    grid-template-columns: 1fr;
    max-width: 32rem;
  }

  .extension--2,
  .extension--3 {
    transform: translateY(0);
  }

  /* NEWSLETTER */
  .newsletter-form {
    flex-direction: column;
    align-items: center;
  }

  .input-group {
    max-width: 100%;
  }

  .contact-btn {
    width: 100%;
  }

  /* FOOTER */
  .footer-container {
    flex-direction: column;
    gap: 3.2rem;
    text-align: center;
  }

  .footer-links {
    flex-direction: column;
    gap: 2.4rem;
  }
}

/* ---- 480px ---- */
@media (max-width: 30rem) {
  .hero__title {
    font-size: 2.8rem;
    width: 100%;
    max-width: 100%;
  }

  .hero__text {
    max-width: 100%;
  }

  .hero__container {
    padding: 0 1.6rem;
  }

  .hero__image-box {
    transform: translateX(2rem);
  }

  .features-content h2 {
    font-size: 2.4rem;
  }

  .newsletter-container h2 {
    font-size: 3.2rem;
  }

  .hero__buttons .btn {
    flex: 1;
    text-align: center;
  }

  .contact-btn {
    width: 100%;
  }

  .tabs__panel a {
    display: none;
  }

  .faq-question {
    align-items: flex-start;
    font-size: 1.2rem;
  }

  .newsletter-container h6 {
    font-size: 1rem;
  }

  .newsletter-container h2 {
    font-size: 2.4rem;
  }

  .newsletter-form {
    gap: 0.5rem;
  }

  .hero__buttons {
    flex-direction: column;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.2rem;
  }
}

.nav__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1000;
}

.close-icon {
  display: none;
}

.nav__mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background-color: hsla(229, 31%, 21%, 0.95);
  z-index: 999;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 10rem 2.4rem 4.8rem;
}

.nav__mobile-menu.open {
  display: flex;
}

.nav__mobile-links {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.nav__mobile-links li {
  width: 100%;
  text-align: center;
  border-top: 1px solid hsla(0, 0%, 100%, 0.15);
}

.nav__mobile-links li:last-child {
  border-bottom: 1px solid hsla(0, 0%, 100%, 0.15);
}

.nav__mobile-links a:not(.btn) {
  display: block;
  padding: 1.6rem 0;
  font-size: 1.8rem;
  font-weight: var(--fw-500);
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.2rem;
}

.nav__mobile-links .btn--outline {
  display: block;
  width: 100%;
  margin-top: 2.4rem;
  padding: 1.2rem;
  font-size: 1.8rem;
  font-weight: var(--fw-500);
  color: #fff;
  border: 2px solid #fff;
  border-radius: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.2rem;
  text-align: center;
}

.nav__mobile-socials {
  display: flex;
  gap: 3.2rem;
  align-items: center;
}

.nav__mobile-socials img {
  filter: brightness(0) invert(1);
  width: 2.4rem;
  height: 2.4rem;
}

/* Show hamburger on mobile */
@media (max-width: 48rem) {
  .nav__hamburger {
    display: block;
  }

  /* Logo white when menu open */
  .header.menu-open .nav__logo-img {
    filter: brightness(0) invert(1);
  }

  .header.menu-open .nav__hamburger {
    position: fixed;
    top: 2.4rem;
    right: 2.4rem;
  }

  .hamburger-icon {
    display: block;
  }

  .header.menu-open .hamburger-icon {
    display: none;
  }

  .header.menu-open .close-icon {
    display: block;
    filter: brightness(0) invert(1);
  }
}