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

body {
  background-color: #e5e5e5;
  font-family: 'Lato', sans-serif;
}

/* NavBar section
############################################################ */

.top_toolbar {
  display: flex;
  flex-direction: row;
  justify-content: end;
  align-items: center;
  padding-right: 10%;
  width: 100%;
  height: 35px;
  background-color: #272a31;
}

.top_toolbar_ul {
  display: flex;
  flex-direction: row;
  width: auto;
  gap: 20px;
}

.top_toolbar_items {
  width: auto;
  color: #fff;
  font-family: 'Lato', sans-serif;
}

.top_toolbar_items_icon {
  width: 20px;
}

header {
  position: fixed;
  width: 100%;
  z-index: 1;
}

ul {
  list-style: none;
}

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

.overflow {
  overflow: hidden;
}

.desktop-nav {
  display: flex;
  justify-content: space-between;
}

nav {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #fff;
  height: 68px;
}

.nav_container {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  width: 80%;
}

.nav-links {
  color: #272a31;
  font-size: 15px;
  font-weight: 500;
  line-height: 20px;
  padding: 10px 12px;
  margin-left: 32px;
  font-family: 'Lato', sans-serif;
}

.nav-links:hover {
  color: #ec5242;
}

.nav-links:active {
  color: #ec5242;
}

.campaign_link {
  border-width: 3px;
  border-style: solid;
  border-color: #ec5242;
}

.header_logo {
  width: 100px;
  height: 50px;
}

.mobile-menu-bars {
  z-index: 100;
  display: none;
  cursor: pointer;
}

.bar1,
.bar2,
.bar3 {
  width: 24px;
  height: 4px;
  background-color: #272a31;
  margin-bottom: 5px;
  transition: 0.5s;
}

.change .bar1 {
  transform: rotate(45deg) translateY(10px);
  background-color: #fff;
}

.change .bar2 {
  opacity: 0;
}

.change .bar3 {
  transform: rotate(-45deg) translateY(-10px);
  background-color: #fff;
}

.overlay {
  position: fixed;
  z-index: 99;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(255, 118, 55, 0.8);
  backdrop-filter: blur(5px);
  transition: 0.6s;
}

.overlay-slide-right {
  transform: translateX(0);
}

.overlay-slide-left {
  transform: translateX(-100vw);
}

#nav-1,
#nav-2,
#nav-3 {
  margin-bottom: 40px;
}

.nav-mobile-links {
  font-weight: 600;
  font-size: 32px;
  line-height: 44px;
  color: #fff;
  font-family: 'Lato', sans-serif;
}

/* NavBar section END
############################################################
Header section
############################################################ */

.header_section {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 740px;
  background-size: cover;
  background-repeat: no-repeat;
  background-image: url(images/back.png);
}

.header_section_main_div {
  display: flex;
  flex-direction: column;
  width: 70%;
}

.header_text_div {
  width: 70%;
}

.header_text {
  width: 100%;
}

.stem_by_us {
  color: #ec5242;
  font-weight: 700;
  font-size: 40px;
  font-family: 'COCOGOOSE', sans-serif;
}

.header_about_stem {
  margin-top: 20px;
  width: auto;
  max-width: 600px;
  font-family: 'Lato', sans-serif;
  font-weight: 500;
  font-size: 15px;
  padding: 16px;
  color: #272a31;
  background-color: rgb(223, 223, 223);
}

.date_of_event {
  margin-top: 10px;
  font-weight: 600;
  font-size: 25px;
  color: #272a31;
  font-family: 'COCOGOOSE', sans-serif;
}

.event_address {
  color: #272a31;
  font-family: 'Lato', sans-serif;
  font-weight: 500;
  font-size: 20px;
  margin-top: 10px;
}

/* Header section END
############################################################
Main Program section
############################################################ */

.main_program_section {
  display: flex;
  flex-direction: row;
  justify-content: center;
  width: 100%;
  height: 600px;
  background-color: rgb(44, 38, 38);
}

.main_program_section_div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: auto;
}

.main_program_heater_text {
  color: #fff;
  font-family: 'Lato', sans-serif;
  font-weight: 600;
  font-size: 30px;
  margin-top: 100px;
}

.orange_line {
  width: 80px;
  height: 3px;
  margin-top: 8px;
  border-radius: 50px;
  background-color: #ec5242;
}

.program_cards_div {
  display: flex;
  flex-direction: row;
  width: 100%;
  padding: 16px;
  gap: 5px;
  margin-top: 60px;
  justify-content: center;
}

.program_card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 30px 10px;
  width: 200px;
  background-color: rgba(168, 168, 168, 0.4);
}

.program_card:hover {
  border-style: solid;
  border-width: 2px;
  border-color: #fff;
  cursor: pointer;
}

.main_program_card_icon {
  width: 40px;
  height: 40px;
}

.main_program_card_title {
  color: #ec5242;
  font-family: 'Lato', sans-serif;
  font-weight: 600;
  font-size: 20px;
  margin-top: 10px;
}

.hello_text {
  color: #ec5242;
  font-family: 'Lato', sans-serif;
  font-weight: 300;
  font-size: 40px;
  margin-bottom: 20px;
}

.main_program_card_message {
  color: #fff;
  font-family: 'Lato', sans-serif;
  font-weight: 500;
  font-size: 13px;
  margin-top: 10px;
  text-align: center;
}

.join_stem_button {
  display: none;
  width: 80%;
  height: 70px;
  color: #fff;
  font-family: 'Lato', sans-serif;
  font-weight: 550;
  font-size: 14px;
  background-color: #ec5242;
  border: none;
}

.see_the_whole_program {
  color: #fff;
  font-family: 'Lato', sans-serif;
  font-weight: 600;
  font-size: 20px;
  margin-top: 50px;
  text-decoration: underline;
}

/* Main Program END
############################################################
Main Featured Speaker section
############################################################ */

.featured_speakers_section {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: auto;
  justify-content: center;
  align-items: center;
  background-color: #f2f1f1;
  padding-bottom: 50px;
}

/* .featured_speakers_main_div {
  display: flex;
  flex-direction: row;
  justify-content: space-between; */

/* flex-wrap: wrap; */

/* width: 90%;
  height: auto;
  padding-bottom: 30px;
  margin-top: 60px;
  gap: 30px;
} */

.featured_speakers_header_text {
  margin-top: 50px;
  font-weight: 560;
  font-size: 25px;
  color: #272a31;
  font-family: 'Lato', sans-serif;
}

.featured_speakers_header_text_underline {
  display: flex;
  width: 70px;
  height: 3px;
  margin-top: 10px;
  border-radius: 50px;
  background-color: #ec5242;
}

.speaker_div {
  display: flex;
  flex-direction: row;
  max-width: 400px;
  width: auto;
  height: auto;
  padding-bottom: 5px;
  gap: 30px;
}

.speaker_image_container {
  width: 40%;
  height: 40%;
}

.speaker_image {
  width: 100%;
  height: 15vh;
}

.speaker_text_container {
  display: flex;
  flex-direction: column;
  width: 60%;
  height: 100%;
  margin-top: -4px;
}

.speaker_name {
  font-weight: 560;
  font-size: 25px;
  color: #272a31;
  font-family: 'Lato', sans-serif;
}

.speaker_education_background {
  margin-top: 10px;
  font-weight: 400;
  font-size: 12px;
  color: #ec5242;
  font-style: italic;
  font-family: 'Lato', sans-serif;
}

.divider_line {
  margin-top: 15px;
  width: 30px;
  height: 2px;
  border-radius: 50px;
  background-color: #3e3e3e;
}

.speaker_education_bio {
  margin-top: 20px;
  font-weight: 300;
  font-size: 12px;
  color: #272a31;
  font-family: 'Lato', sans-serif;
}

.expand_more_place_holder {
  display: none;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  width: 90%;
  height: 50px;
  border-style: solid;
  border-width: 1px;
  border-color: #d3d3d3;
}

.more_text {
  font-weight: 500;
  font-size: 15px;
  color: #272a31;
  font-family: 'Lato', sans-serif;
}

.expand_arrow {
  width: 15px;
  margin-left: 13px;
}

/* Main Featured Speaker section END
############################################################
Partners section
############################################################ */

.partners_section {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  height: 300px;
  background-color: #272a31;
}

/* .partners_section_title {
  margin-top: 50px;
  font-weight: 560;
  font-size: 25px;
  color: #4f4f4f;
  font-family: 'Lato', sans-serif;
} */

.partners_section_title_underline {
  display: flex;
  width: 40px;
  height: 3px;
  margin-top: 10px;
  border-radius: 50px;
  background-color: #ec5242;
}

.partners_logos {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  width: 90%;
  height: 150px;
}

/* .partners_logo_image {
  width: 18rem;
} */

.header_text_div p {
  max-width: 500px;
}

/* Partners section END
############################################################
Footer section
############################################################ */

/* .footer_section {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 250px;
  background-color: #d3d3d3;
} */

/* .footer_main_div {
  display: flex;
  flex-direction: row;
  width: 70%;
  align-items: center;
  justify-content: center;
  gap: 30px;
} */

.footer_logo {
  width: 7rem;
}

/* .footer_text_div {
  display: flex;
  flex-direction: column;
  width: 50%;
  height: auto;
} */

.right_reserved {
  font-weight: 560;
  font-size: 15px;
  color: #272a31;
  margin-bottom: 10px;
  font-family: 'Lato', sans-serif;
}

.footer_text {
  font-weight: 500;
  font-size: 15px;
  color: #272a31;
  font-family: 'Lato', sans-serif;
}

/* to put two */

/* .featured_speakers_main_div {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  flex-wrap: wrap;
  width: 70%;
  height: auto;
  padding-bottom: 30px;
  margin-top: 60px;
  gap: 30px;
} */

/* =====================================================================
Media Query
===================================================================== */
@media only screen and (max-width: 768px) {
  .nav_container {
    flex-direction: row-reverse;
  }

  .top_toolbar {
    display: none;
  }

  nav {
    background-color: transparent;
  }

  header {
    position: absolute;
  }

  .header_logo {
    display: none;
  }

  .mobile-menu-bars {
    display: inline;
  }

  .desktop {
    display: none;
  }

  .header_text_div {
    width: 90%;
  }

  .main_program_section {
    height: auto;
  }

  .stem_by_us {
    font-size: 30px;
  }

  .program_cards_div {
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
    margin-bottom: 20px;
    gap: 15px;
  }

  .program_card {
    flex-direction: row;
    width: 90%;
    padding: 15px 10px;
    gap: 20px;
  }

  .main_program_card_message {
    text-align: start;
  }

  .main_program_heater_text {
    margin-top: 30px;
  }

  .main_program_card_title {
    width: 250px;
  }

  .see_the_whole_program {
    display: none;
    margin-top: 15px;
    margin-bottom: 35px;
  }

  .join_stem_button {
    display: block;
    margin-bottom: 30px;
  }

  .speaker_div {
    margin-top: 30px;
  }

  .speaker_education_bio {
    margin-top: 10px;
    font-size: 16px;
  }

  .expand_more_place_holder {
    display: flex;
    cursor: pointer;
  }

  .partners_logos {
    display: flex;
    height: auto;
    margin-top: 40px;
    gap: 23px;
  }

  /* to put teo rows */
  .featured_speakers_main_div {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    flex-wrap: wrap;
    width: 70%;
    height: auto;
    padding-bottom: 30px;
    margin-top: 60px;
    gap: 30px;
  }
}

.partners_logo_image {
  width: 6rem;
}

/* .partners_section {
  height: auto;
  padding-bottom: 40px;
} */

.footer_section {
  height: auto;
}

.footer_main_div {
  display: flex;
  width: 90%;
  margin: 0 auto;
  padding: 50px;
  justify-content: center;
}

.footer_text_div {
  width: 70%;
  margin-bottom: 30px;
  padding-left: 16px;
}

.featured_speakers_main_div {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  flex-wrap: wrap;
  width: 70%;
  height: auto;
  padding-bottom: 30px;
  margin-top: 60px;
  gap: 30px;
}

.partners_section_title {
  margin-top: 50px;
  font-weight: 560;
  font-size: 30px;
  color: #fff;
  font-family: 'Lato', sans-serif;
}