:root {
  --primary-color: #ec5242;
  --secondary-color: #272a31;
  --tertiary-color: #f9f7f9;
  --white: #fff;
  --gray-black: #373a41;
}

* {
  font-family: "Lato", sans-serif;
}

@font-face {
  font-family: cocogoose;
  src: url(Fonts/Cocogoose.otf);
  font-weight: bold;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

.logo {
  align-items: center;
}

ul {
  list-style: none;
}

a,
a:active,
a:visited {
  text-decoration: none;
  color: var(--gray-black);
}

img {
  object-fit: cover;
}

.flex-row {
  display: flex;
}

.flex-column {
  display: flex;
  flex-direction: column;
}

.logo span,
.main-nav__list__mobile li a,
.date,
.hero__footer-email p,
.about-program__logo,
.hero__heading {
  font-family: cocogoose, sans-serif;
}

.sec-nav__list,
.main-nav__list,
.main-nav .logo,
#tecno {
  visibility: hidden;
  position: absolute;
}

.burger {
  margin: 0.5rem 0 0 2.1rem;
  visibility: visible;
  cursor: pointer;
  position: fixed;
}

.main-nav__list__mobile,
.main-footer__mobile {
  background-color: var(--primary-color);
}

.main-nav__list__mobile {
  width: 100vw;
  height: 100vh;
  gap: 3rem;
  align-items: center;
  font-size: 1.5rem;
  position: fixed;
  visibility: hidden;
}

.XIcon {
  align-self: flex-end;
  margin-right: 2rem;
  cursor: pointer;
  margin-top: 1rem;
  transform: scale(2);
}

.show {
  visibility: visible;
}

.hide {
  visibility: hidden;
}

.hero {
  background-image: url(images/backgrounds/mobile-bg.png);
  padding: 5rem 1em;
  width: 100%;
  min-height: max-content;
  margin: 0 auto;
}

.hero__heading {
  font-size: 1.7rem;
  font-weight: 800;
  background: url(images/about/redfilter.jpeg);
  background-position: center center;
  -webkit-background-clip: text;
  color: transparent;
  line-height: 1;
}

.hero,
.hero__heading {
  background-size: cover;
  background-repeat: no-repeat;
}

.hero__subtitle {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.hero__text {
  border: 2px solid var(--white);
  padding: 1.5em;
  margin-top: 0.5rem;
  margin-bottom: 1.3rem;
  background-color: var(--tertiary-color);
  width: fit-content;
  line-height: 1.7;
}

#home,
#about,
#tecno,
.hero__subtitle,
.main-program__item h5,
.feature-speaker__qualification,
.hero.about .hero__heading {
  color: var(--primary-color);
  font-size: 1rem;
}

.date,
.hero__footer-email p {
  font-size: 1.2rem;
}

.venue {
  font-size: 0.7rem;
}

.main-program {
  align-items: center;
  justify-content: center;
  background: url(images/home/fill-bg.png) repeat;
  background-color: var(--secondary-color);
  gap: 2rem;
  padding: 2em;
}

.main-program__heading span,
.featured-speakers__heading span,
.partners-heading span,
.last-summit__heading span,
.about-program__heading span {
  border-bottom: 0.1rem solid var(--primary-color);
}

.main-program__heading span,
.featured-speakers__heading span,
.partners-heading span {
  padding-bottom: 0.7em;
}

.main-program__heading {
  font-weight: 400;
}

.main-program__items {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 2rem 0;
}

.main-program__item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background-color: var(--gray-black);
  padding: 1em;
  cursor: pointer;
  border: 0.15rem solid transparent;
  width: 90vw;
}

.main-program__item h5 {
  width: 10rem;
  text-align: center;
}

.main-program__item p {
  font-size: 0.8rem;
  line-height: 2em;
  flex-shrink: 2;
}

.main-footer__desktop {
  visibility: hidden;
  position: absolute;
}

.main-footer__mobile {
  visibility: visible;
  position: static;
  padding: 1em;
  font-size: 1rem;
  cursor: pointer;
  border: 2px solid transparent;
}

.last-summit__info,
.main-footer__mobile,
.main-footer__desktop p,
.main-nav__list__mobile li a,
.main-program {
  color: var(--white);
}

.main-footer__mobile:hover,
.main-program__item:hover {
  border-color: var(--white);
}

.main-footer__desktop p {
  font-size: 1rem;
  font-weight: bold;
}

.featured-speakers {
  margin-top: 3rem;
  gap: 1.5rem;
  font-size: 1.5rem;
}

.featured-speakers__heading {
  margin: 0 auto 1.5rem;
}

.featured-speakers__items {
  display: grid;
  gap: 1.5rem;
  padding: 1rem 0.5rem;
}

.featured-speaker__image {
  width: 6rem;
  height: 6rem;
  margin-left: 2rem;
  margin-top: 1.5rem;
  max-width: 100%;
}

.featured-speaker__image img {
  width: 100%;
  height: 100%;
}

.featured-speakers__item {
  justify-content: center;
  gap: 1rem;
  background: url(images/home/empty-chessboard-svgrepo-com.svg) no-repeat;
  background-size: 4rem;
  background-position: 3% 1%;
}

.featured-speakers__item:nth-child(n+3) {
  position: absolute;
  visibility: hidden;
}

.featured-speakers__more::before {
  content: 'More';
  margin-right: 0.5rem;
}

.featured-speakers__more::after {
  content: 'v';
  color: var(--primary-color);
  font-weight: bold;
  font-size: 1rem;
}

.more .featured-speakers__item:nth-child(n+3) {
  position: static;
  visibility: visible;
}

.more .featured-speakers__more::before {
  content: 'See Less';
}

.more .featured-speakers__more::after {
  content: '^';
  font-size: 1.3rem;
}

.featured-speaker {
  gap: 0.7rem;
  margin-top: 1rem;
  flex-basis: 70%;
}

.featured-speakers__more {
  cursor: pointer;
  text-align: center;
  font-size: 1.2rem;
  border: 1px solid gray;
  padding: 1rem;
  margin: 1rem;
}

.featured-speakers__more span {
  color: var(--primary-color);
}

.featured-speaker__name {
  font-size: 1rem;
}

.feature-speaker__qualification {
  font-style: italic;
  margin-bottom: 0.8rem;
}

.featured-speaker__about {
  font-size: 0.8rem;
  width: 100%;
  line-height: 1.5;
}

.featured-speaker__about span {
  border-top: 0.1rem solid var(--primary-color);
  padding-top: 1em;
}

.partners {
  margin-top: 2rem;
  align-items: center;
  background-color: var(--gray-black);
  padding: 1em;
}

.partners-heading {
  color: var(--tertiary-color);
}

.partners-body {
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  align-content: center;
}

.footer {
  padding: 1rem;
  align-items: center;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.footer p {
  font-size: 0.5rem;
}

/* about page styles */

.hero.about {
  text-align: center;
}

.hero.about .hero__heading {
  background-image: none;
}

.hero__footer-contactUs {
  font-size: 2vw;
}

.hero__footer-email p {
  font-size: 1.5vw;
  color: var(--secondary-color);
}

.about-program {
  text-align: center;
  align-items: center;
  padding: 4em;
  gap: 2rem;
  border-bottom: 0.1rem solid var(--tertiary-color);
}

.about-program__heading {
  line-height: 1.5rem;
}

.last-summit__heading span {
  padding-bottom: 0.5rem;
}

.about-program__heading span {
  padding-bottom: 1.5vw;
}

.about-program__text {
  font-size: 0.8rem;
}

.logo-about {
  border: 0.1rem solid var(--tertiary-color);
  margin-bottom: 1.5rem;
  align-items: center;
}

.about-program__logo {
  color: var(--gray-black);
}

.about-program_date {
  font-size: 0.7rem;
  border-top: 0.1rem solid var(--gray-black);
  border-bottom: 0.1rem solid var(--gray-black);
  color: var(--gray-black);
}

.last-summit {
  text-align: center;
}

.last-summit__heading {
  font-size: 1rem;
  margin-top: 2rem;
}

.last-summit__text {
  font-size: 1rem;
  margin-top: 2rem;
  margin-bottom: 3rem;
  padding: 0 4rem;
}

.last-summit__images {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.last-summit__image-wrapper {
  width: 70vw;
  height: 40vw;
  position: relative;
  text-align: center;
}

.last-summit__image-wrapper img {
  width: 100%;
  height: 100%;
}

.last-summit__info {
  justify-content: center;
  width: 100%;
  height: 100%;
  line-height: 4vw;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(to right, rgba(255, 0, 0, 0.7), rgba(252, 0, 0, 0.7));
}

.last-summit__year {
  font-size: 2.1rem;
  margin-bottom: 1.3rem;
}

.last-summit__venue {
  font-size: 1rem;
  line-height: 1.1;
}

@media only screen and (min-width: 900px) {
  body {
    width: 100vw;
  }

  .burger {
    display: none;
  }

  .sec-nav__list {
    padding: 0.5rem 0;
    justify-content: flex-end;
    gap: 2em;
    align-items: center;
    background-color: var(--secondary-color);
    visibility: visible;
    position: static;
  }

  .sec-nav__item:last-child {
    margin-right: 11rem;
  }

  .sec-nav__list a,
  .main-footer__desktop {
    color: var(--white);
  }

  .sec-nav__link {
    color: var(--color-white);
  }

  .main-nav {
    background-color: var(--white);
    align-items: center;
    padding: 1rem 7rem;
    margin: 0 auto;
    gap: 1.7rem;
    justify-content: space-around;
  }

  .main-nav .logo {
    visibility: visible;
    position: static;
    cursor: pointer;
  }

  .main-nav__list {
    gap: 3rem;
    position: static;
    font-size: 1rem;
    visibility: visible;
    background-color: transparent;
    height: max-content;
    width: max-content;
  }

  #tecno {
    border: 4px solid var(--primary-color);
    padding: 0.5em;
    visibility: visible;
    position: static;
    transition: all 0.3s ease-in-out;
  }

  #tecno:hover {
    color: var(--tertiary-color);
    background-color: var(--primary-color);
  }

  .XIcon {
    visibility: hidden;
    position: absolute;
  }

  .main-nav__list__mobile {
    visibility: hidden;
    position: absolute;
  }

  .main-nav__list li a {
    font-family: "Lato", sans-serif;
    font-weight: 700;
  }

  .main-nav__list li a,
  .sec-nav__list li:hover a {
    transition: all 0.2s ease-in-out;
  }

  .main-nav__list li:hover a {
    color: var(--primary-color);
  }

  .sec-nav__list li:hover a {
    filter: invert(60%) sepia(87%) saturate(5934%) hue-rotate(341deg) brightness(106%) contrast(85%);
  }

  .hero {
    background-image: url(images/backgrounds/main-bg.png);
    padding: 6rem 11rem 8.5rem;
    background-position: -15rem -0.1rem;
  }

  .hero.about {
    background-position: 0 0;
  }

  .hero .hero__heading {
    font-size: 3.5rem;
  }

  .hero.about .hero__heading {
    font-size: 3rem;
  }

  .hero .hero__subtitle {
    font-size: 2.5rem;
    font-weight: 500;
    margin-bottom: 1.3rem;
  }

  .hero .hero__body .hero__text {
    font-size: 0.8rem;
  }

  .hero .date {
    font-size: 2rem;
  }

  .hero .venue {
    font-size: 1rem;
  }

  .main-program {
    padding: 3.5rem 11rem 5.5rem;
  }

  .main-program__heading {
    font-size: 1.5rem;
    margin-bottom: 1rem;
  }

  .main-program__items {
    flex-direction: row;
    gap: 0.5rem;
  }

  .main-program__item {
    flex-direction: column;
    padding-top: 1rem;
    padding-bottom: 1rem;
    width: 100%;
  }

  .main-program__item h5 {
    width: fit-content;
  }

  .main-program__item p {
    font-size: 0.8rem;
    line-height: 2em;
    text-align: center;
    flex-shrink: 1;
  }

  .main-footer__desktop {
    visibility: visible;
    position: static;
    text-decoration: underline;
  }

  .main-footer__mobile {
    visibility: hidden;
    position: absolute;
  }

  .featured-speakers {
    padding: 0 0;
  }

  .featured-speakers__items {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    padding: 2rem 11rem;
  }

  .featured-speakers__item:nth-child(n+3) {
    position: static;
    visibility: visible;
  }

  .featured-speakers__more {
    position: absolute;
    visibility: hidden;
  }

  .featured-speaker__about {
    width: 100%;
  }

  .partners {
    padding: 4rem;
  }

  .partners-heading {
    font-size: 1.5rem;
    margin-bottom: 2rem;
  }

  /* about page styles */

  .last-summit__image-wrapper {
    width: 35vw;
    height: 21vw;
  }

  .last-summit__images {
    flex-direction: row;
    margin: 0 auto;
  }

  .logo-about {
    margin-top: 2rem;
    scale: 2;
  }
}