:root {
  --color-primary: #bb0102;
  --color-primary--darker: #960102;
  --color-secondary: #fff;
  --color-tertiary: #1c1c1c;
  --color-tertiary--lighter: #666;
}

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

html {
  font-size: 62.5%;

  scroll-behavior: smooth;
}

body {
  font-family: 'Rajdhani', sans-serif;
  background-color: var(--color-secondary);
  line-height: 1;
  font-weight: 400;
}

main {
  color: var(--color-tertiary--lighter);
}

/************************/
/* GENERAL ELEMENTS */
/************************/

.container {
  max-width: 130rem;
  margin: 0 auto;
  padding: 0 3.2rem;
}

.grid {
  display: grid;
  column-gap: 6.4rem;
  row-gap: 9.6rem;
}

.grid:not(:last-child) {
  margin-bottom: 9.6rem;
}

.grid--2-cols {
  grid-template-columns: repeat(2, 1fr);
}

.grid--center-v {
  align-items: center;
}

main .heading-primary,
main .heading-secondary,
main .heading-tertiary {
  color: var(--color-tertiary);
}

.heading-primary {
  font-weight: 700;
  color: var(--color-secondary) !important;

  font-size: 5.2rem;
  margin-bottom: 3.2rem;
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.heading-secondary {
  font-size: 4.4rem;
  line-height: 1.2;
  margin-bottom: 9.6rem;
}

.heading-tertiary {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 3.2rem;
}

.subheading {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary--darker);
  text-transform: uppercase;
  margin-bottom: 1.6rem;
  letter-spacing: 0.75px;
}

.btn,
.btn:link,
.btn:visited {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 2rem;
  padding: 1.6rem 3.2rem;
  border-radius: 0.5rem;

  border: none;
  cursor: pointer;
  font-family: inherit;

  transition: all 0.3s;
}

.btn--full:link,
.btn--full:visited {
  background-color: var(--color-primary);
  color: var(--color-secondary);
}

.btn--full:hover,
.btn--full:active {
  background-color: var(--color-primary--darker);
}

.header,
.section-hero {
  color: var(--color-secondary);
}

.section {
  transition: transform 1s, opacity 1s;
}

.section--hidden {
  opacity: 0;
  transform: translateY(8rem);
}

/************************/
/* HEADER */
/************************/

.header {
  background-color: var(--color-tertiary);
  padding: 1.2rem 0;
  width: 100%;
  z-index: 100;
}

.sticky .header {
  position: fixed;
  top: 0;
}

.sticky .section-hero {
  margin-top: 9.1rem;
}

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

.logo {
  height: 6.5rem;
}

/************************/
/* NAVIGATION */
/************************/

.nav-list {
  display: flex;
  gap: 4.8rem;
  align-items: center;
  list-style: none;
  text-transform: uppercase;
}

.nav-link:link,
.nav-link:visited {
  display: inline-block;
  text-decoration: none;
  color: var(--color-secondary);
  font-weight: 600;
  font-size: 1.8rem;
  transition: all 0.3s;
}

.nav-link:hover,
.nav-link:active {
  color: var(--color-primary);
}

.nav-link.nav-link--btn:link,
.nav-link.nav-link--btn:visited {
  padding: 1.2rem 2.4rem;
  border-radius: 0.5rem;
  color: var(--color-secondary);
  background-color: var(--color-primary);
}

.nav-link.nav-link--btn:hover,
.nav-link.nav-link--btn:active {
  color: var(--color-primary);
  background-color: var(--color-secondary);
}

.red-link:link,
.red-link:visited {
  color: var(--color-primary);
}

/************************/
/* MOBILE NAV */
/************************/

.btn-mobile-nav {
  border: none;
  background: none;
  cursor: pointer;

  display: none;
}

.icon-mobile-nav {
  height: 4.8rem;
  width: 4.8rem;
  color: var(--color-secondary);
}

.icon-mobile-nav[name='close-outline'] {
  display: none;
}

/************************/
/* HERO SECTION */
/************************/

.section-hero {
  background-image: linear-gradient(
      rgba(34, 34, 34, 0.8),
      rgba(34, 34, 34, 0.8)
    ),
    url(../img/hero-img.jpg);
  background-size: cover;
  background-position: center;
  padding: 8rem 0 14rem 0;
}

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

.hero-description {
  font-size: 2rem;
  line-height: 1.8;
  margin-bottom: 4.8rem;
}

/************************/
/* COURSES SECTION */
/************************/

.section-courses {
  padding: 9.6rem 0;
}

.course-name {
  font-size: 8.6rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-primary--darker);
  margin-bottom: 1.2rem;
}

.course-description {
  font-size: 1.8rem;
  line-height: 1.8;
  font-weight: 600;
}

.course-img-box {
  display: flex;
  align-items: center;
  justify-content: center;
}

.course-img-box {
  overflow: hidden;
  border-radius: 0.5rem;
}

.course-img {
  width: 100%;
  filter: grayscale(100%);
  transition: all 0.4s;
}

.course-img:hover {
  filter: grayscale(0%);
  transform: scale(1.1);
}

/************************/
/* TESTIMONIALS SECTION */
/************************/

.section-testimonials {
  padding: 9.6rem 0;
}

.section-title {
  text-align: center;
}

/* SLIDER */

.slider {
  max-width: 100rem;
  height: 35rem;
  margin: 0 auto;
  padding: 0 3.2rem;
  position: relative;

  overflow: hidden;
}

.slide {
  position: absolute;
  top: 0;
  width: 100%;
  height: 35rem;
  display: flex;
  align-items: center;
  justify-content: center;

  transition: transform 1s;
}

.slider-btn {
  position: absolute;
  top: 50%;
  z-index: 10;

  border: none;
  background: var(--color-secondary);
  font-family: inherit;
  color: var(--color-primary--darker);
  border-radius: 50%;
  height: 5.5rem;
  width: 5.5rem;
  font-size: 3.25rem;
  cursor: pointer;
}

.slider-btn--left {
  left: 10%;
  transform: translate(-50%, -50%);
}

.slider-btn--right {
  right: 6%;
  transform: translate(50%, -50%);
}

.dots {
  position: absolute;
  bottom: 1%;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
}

.dots-dot {
  border: none;
  background-color: #b9b9b9;
  opacity: 0.7;
  height: 1rem;
  width: 1rem;
  border-radius: 50%;
  margin-right: 1.75rem;
  cursor: pointer;
  transition: all 0.5s;
}

.dots-dot:last-child {
  margin: 0;
}

.dots-dot--active {
  background-color: #888;
  opacity: 1;
}

/* TESTIMONIALS */
.testimonial {
  width: 65%;
}

.testimonial-header {
  font-size: 2.4rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--color-tertiary);
  line-height: 1.6;
}

.testimonial-text {
  font-size: 1.7rem;
  font-weight: 500;
  line-height: 1.8;
  margin-bottom: 3.5rem;
  color: var(--color-tertiary--lighter);
}

.testimonial-author {
  font-style: normal;

  display: grid;
  grid-template-columns: 6.5rem 1fr;
  column-gap: 2rem;
}

.testimonial-photo {
  grid-row: 1 / span 2;
  width: 6.5rem;
  border-radius: 50%;
}

.testimonial-name {
  font-size: 1.8rem;
  font-weight: 600;
  align-self: end;
  margin: 0;
  color: var(--color-tertiary);
}

.testimonial-location {
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 1.8;
  align-self: end;
  color: var(--color-tertiary--lighter);
}

/************************/
/* SCHEDULE SECTION */
/************************/

.section-schedule {
  padding: 9.6rem 0;
}

.accordion {
  max-width: 70rem;
  margin: 0 auto;
  padding: 0 3.2rem;

  display: flex;
  flex-direction: column;
  gap: 2.4rem;
}

.item {
  box-shadow: 0 0 1.2rem rgba(0, 0, 0, 0.1);
  padding: 2.4rem;

  display: grid;
  grid-template-columns: auto 1fr auto;
  column-gap: 2.4rem;
  row-gap: 3.2rem;
  align-items: center;
  cursor: pointer;
}

.number,
.text {
  font-size: 2.4rem;
  font-weight: 600;
  color: var(--color-tertiary);
}

.number {
  color: #ced4da;
}

.icon {
  width: 2.4rem;
  height: 2.4rem;
  stroke: var(--color-primary);
  cursor: pointer;
}

.hidden-box {
  grid-column: 2;
  display: none;
}

.hidden-box p {
  font-size: 1.7rem;
  font-weight: 500;
  line-height: 1.8;
  margin-bottom: 2.4rem;
  color: var(--color-tertiary);
}

.hidden-box ul {
  font-size: 1.7rem;
  font-weight: 500;
  line-height: 1.6;

  margin-left: 2rem;

  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.open {
  border-top: 0.4rem solid var(--color-primary);
}

.open .hidden-box {
  display: block;
}

.open .number,
.open .text {
  color: var(--color-primary);
}

.open .icon {
  transform: rotate(-180deg);
}

/************************/
/* PRICES SECTION */
/************************/

.section-prices {
  padding: 9.6rem 0;
}

.pricing-plan {
  border-radius: 0.5rem;
  width: 75%;
}

.pricing-plan--month {
  justify-self: end;
  border: 1px solid var(--color-primary);
  padding: 4.6rem;
}

.pricing-plan--year {
  background-color: var(--color-primary);
  padding: 4.8rem;
  position: relative;
  overflow: hidden;
}

.pricing-plan--year::after {
  content: 'popular';
  position: absolute;
  top: 6%;
  right: -17%;

  text-transform: uppercase;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-secondary);
  background-color: var(--color-tertiary);
  padding: 0.8rem 8rem;
  transform: rotate(45deg);
}

.plan-name {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.75px;
  margin-bottom: 3.2rem;
}

.pricing-plan--year .plan-name {
  color: var(--color-secondary);
}

.plan-price {
  font-size: 6.2rem;
  font-weight: 700;
  color: var(--color-tertiary);
  margin-bottom: 1.6rem;
}

.pricing-plan--year .plan-price {
  color: var(--color-secondary);
}

.plan-price span {
  font-size: 3rem;
  font-weight: 700;
  margin-right: 0.8rem;
  text-transform: uppercase;
}

.plan-text {
  font-size: 1.8rem;
  font-weight: 500;
  line-height: 1.6;
}

.pricing-plan--year .plan-text {
  color: #e6e6e6;
}

/************************/
/* CTA SECTION */
/************************/

.section-cta {
  position: relative;
  margin-bottom: -10rem;
}

.cta-container {
  max-width: 100rem;
  margin: 0 auto;
  padding: 0 3.2rem;
}

.cta {
  display: flex;
  flex-direction: column;
  text-align: center;
  gap: 4.8rem;
  box-shadow: 0rem 0rem 0.5rem 0.5rem rgba(0, 0, 0, 0.03);
  border-radius: 0.5rem;
  padding: 4.8rem 8rem;
  background-color: var(--color-secondary);
}

.cta .heading-tertiary {
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 0;
}

.btn--cta {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 2rem;
  padding: 1.6rem 8rem;
  border-radius: 0.5rem;
  background-color: var(--color-primary);
  color: var(--color-secondary);

  border: none;
  cursor: pointer;
  font-family: inherit;

  transition: all 0.3s;

  width: fit-content;
  align-self: center;
  text-transform: uppercase;
}

.btn--cta:hover {
  background-color: var(--color-primary--darker);
}

/************************/
/* FOOTER SECTION */
/************************/

.footer {
  padding: 16rem 0 6.4rem 0;
  background-color: var(--color-tertiary);
}

.footer-nav {
  list-style: none;
  display: flex;
  justify-content: center;
}

.footer-item:not(:last-child) {
  margin-right: 8rem;
}

.footer-link {
  font-size: 1.6rem;
  color: var(--color-secondary);
  text-decoration: none;
  font-weight: 500;
}

.footer-logo {
  height: 8rem;
  display: block;
  margin: 0 auto;
  margin-top: 6.4rem;
  margin-bottom: 6.4rem;
}

.footer-copyright {
  font-size: 1.6rem;
  color: #ccc;
  text-align: center;
  letter-spacing: 0.5px;
}

/************************/
/* MODAL WINDOW */
/************************/

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 60rem;
  background-color: #f3f3f3;
  padding: 5rem 6rem;
  box-shadow: 0 4rem 6rem rgba(0, 0, 0, 0.3);
  z-index: 9999;
  transition: all 0.5s;
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 9998;
  transition: all 0.5s;
}

.modal-header {
  font-size: 3.25rem;
  margin-bottom: 4.5rem;
  line-height: 1.5;
  color: var(--color-tertiary);
}

.modal-form {
  margin: 0 3rem;
  display: grid;
  grid-template-columns: 1fr 2fr;
  align-items: center;
  gap: 2.5rem;
}

.modal-form label {
  font-size: 1.7rem;
  font-weight: 600;
  color: var(--color-tertiary);
}

.modal-form input {
  font-size: 1.7rem;
  padding: 1rem 1.5rem;
  border: 1px solid #ddd;
  border-radius: 0.5rem;
}

.modal-form input::placeholder {
  opacity: 0.5;
}

.modal-form button {
  grid-column: 1 / span 2;
  justify-self: center;
  margin-top: 1rem;
}

.btn--close-modal {
  font-family: inherit;
  position: absolute;
  top: 0.5rem;
  right: 2rem;
  font-size: 5.2rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: none;
  color: var(--color-primary--darker);
}

.btn--modal {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.8rem;
  padding: 1.6rem 4.8rem;
  border-radius: 0.5rem;
  background-color: var(--color-primary);
  color: var(--color-secondary);

  border: none;
  cursor: pointer;
  font-family: inherit;

  transition: all 0.3s;

  width: fit-content;
  align-self: center;
}

.hidden {
  visibility: hidden;
  opacity: 0;
}

/************************/
/* MESSAGE */
/************************/
.message {
  display: flex;
  align-items: center;
  background-color: var(--color-secondary);
  color: var(--color-tertiary);
  font-size: 1.4rem;
  font-weight: 600;
  padding: 0.6rem 3.2rem;
  max-width: 130rem;
  margin: 0 auto;
}

.email-icon {
  color: var(--color-primary);
  margin-right: 1rem;
}