styles.css

:root {
  --dark-bg-color: #232f3e;
  --light-bg-color: #eeeeee;
  --primary-color: #f79808;
  --width-speaker: "300px";
}

html {
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
  font-size: 10px;
  scroll-behavior: smooth;
}

img {
  border-style: none;
}

body {
  margin: 0;
  padding: 0;
  font-family: Tahoma, sans-serif;
  box-sizing: border-box;
  color: white;
  background-color: var(--dark-bg-color);
  font-size: 1.6rem;
}

article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section,
main {
  display: block;
}

h1 {
  font-size: 2em;
  margin: 0.67em 0;
}

img {
  overflow-clip-margin: content-box;
  overflow: clip;
}

a {
  text-decoration: none;
  color: #f79808;
}

a:hover {
  color: #fbc036;
}

.container {
  max-width: 1100px;
  padding: 0 20px;
  margin: 0 auto;
}

#header {
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  z-index: 1000;
  height: 60px;
}

.header-container {
  display: flex;
  align-items: center;
  height: 100%;
}

.header-scrolled {
  background: var(--dark-bg-color);
  border-bottom: 1px solid var(--primary-color);
  transition: all 0.5s;
}

.navbar {
  overflow: hidden;
  margin-left: auto;
}

.navbar ul {
  list-style-type: none;
  display: flex;
  margin: 0;
  padding: 0;
}

.navbar li a {
  display: block;
  color: rgba(202, 206, 221, 0.8);
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.navbar li a:hover,
.navbar li a:active {
  color: white;
}

.navbar li a.menu-bay-tickets {
  color: #f79808;
}

.navbar li a.menu-bay-tickets:hover,
.navbar li a.menu-bay-tickets:active {
  color: #fbc036;
}

.logo {
  margin-top: 5px;
}

.burger-menu {
  display: none;
  cursor: pointer;
}

#intro {
  position: relative;
  height: 100vh;
  background: url("./assets/img/intro_bg.webp") no-repeat center center;
  background-size: cover;
  overflow: hidden;
}

.info-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
}

.info-description {
  font-size: 2rem;
  text-align: center;
  margin: 20px 0;
}

.cloud {
  height: 60px;
  width: 100%;
  background-image: url("./assets/img/cloud.svg");
  background-repeat: repeat-x;
  background-position: bottom center;
  background-size: contain;
  position: absolute;
  bottom: -1px;
  left: 0;
}

.button {
  display: inline-block;
  padding: 10px;
  text-decoration: none;
  color: white;
  background-color: var(--primary-color);
  cursor: pointer;
  border-radius: 6px;
}

.button:hover {
  background-color: #ee9002;
  color: white;
}

.section {
  padding: 50px 0;
}

.section_light {
  background-color: white;
  color: #232f3e;
}

.section-title,
.section-subtitle {
  font-size: 3rem;
  font-weight: bolder;
  text-transform: uppercase;
  padding: 0;
  color: transparent;
  background-image: linear-gradient(180turn, #d88200 0%, #fbc036 100%);
  -webkit-background-clip: text;
  will-change: transform;
  line-height: 1.25;
  background-position: center center;
  border-color: transparent;
  border-style: solid;
  width: fit-content;
  margin: 30px 0;
}

.section-subtitle {
  font-size: 2rem;
}

.wave {
  background-image: url("./assets/img/wave.svg");
  background-repeat: no-repeat;
  background-size: cover;
  position: absolute;
  height: 120px;
  bottom: -1px;
  left: 0;
  right: 0;
}

.tickets-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 70px;
}

.ticket {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  border-top-width: 20px;
  width: 250px;
  position: relative;
  /* border: 1px solid #e8e8e8; */
  border-radius: 6px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.14);
  color: #232f3e;
  min-height: 300px;
}

.ticket-title-container {
  padding-top: 16px;
  width: 100%;
  min-height: 100px;
}

.ticket-title {
  font-size: 3rem;
  font-weight: bolder;
  text-align: center;
  width: 100%;
}

.ticket__supper-early-bird .ticket-title {
  color: #e93e2c;
}

.ticket__supper-early-bird .ticket-end {
  background-color: #e93e2c;
}

.ticket__early-bird .ticket-title {
  color: var(--primary-color);
}

.ticket__early-bird .ticket-end {
  background-color: var(--primary-color);
}

.ticket-sum {
  font-size: 4rem;
  font-weight: 900;
  padding: 0;
  margin: 0;
  flex-grow: 1;
}

.ticket-end {
  display: flex;
  justify-content: center;
  align-items: center;
  align-self: stretch;
  height: 36px;
  margin: 12px 0 24px;
  background-color: #ced0db;
  color: white;
  font-weight: 600;
}

.ticket-end > p {
  padding: 0;
  margin: 0;
}

.bay-ticket {
  font-size: 2rem;
  padding: 10px;
  margin-bottom: 15px;
  background-color: #e93e2c;
  color: white;
}

.bay-ticket:hover {
  background-color: #fa5342;
}

.bay-ticket__disabled {
  background-color: #ced0db;
  cursor: default;
}

.bay-ticket__disabled:hover {
  background-color: #ced0db;
}

.ticket-disclosure {
  text-align: center;
  margin-top: 60px;
}

#speakers {
  padding-bottom: 150px;
}

.flex-wrap-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  align-items: center;
  gap: 40px;
}

.speaker {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  margin: 30px 0;
}

.speaker-img {
  width: 255px;
  height: 255px;
  border-radius: 50%;
  overflow: hidden;
  user-select: none;
}

.speaker-info {
  color: #9195a2;
  margin-top: 18px;
}

.speaker-info > p {
  padding: 0;
  margin: 0;
}

.speaker-title {
  font-size: 2.2rem;
  font-weight: 900;
  text-decoration: none;
  color: #232f3e;
  margin-bottom: 12px;
}

.speaker-title > span {
  color: var(--primary-color);
}

#agenda {
  padding-top: 0;
}

#location {
  padding-bottom: 0;
}

.location-container {
  display: flex;
  gap: 10px;
  overflow: hidden;
}

.location-description {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-size: 1.8rem;
  line-height: 1.6;
  margin-left: 40px;
}

.call-for-sponsors {
  font-size: 2rem;
  line-height: 3rem;
  margin-top: 60px;
  max-width: 500px;
}

.section_light .call-for-sponsors {
  color: #232f3e;
}

.members-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px;
}

.member {
  display: flex;
  width: 500px;
}

.member-img {
  flex-shrink: 0;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  overflow: hidden;
  user-select: none;
  margin-right: 20px;
}

.avatar {
  width: 100%;
  height: 100%;
  text-align: center;
  object-fit: contain;
}

.member-info {
  color: #9195a2;
  margin-top: 18px;
}

.member-info > p {
  padding: 0;
  margin: 0;
}

.member-title {
  display: inline-block;
  font-size: 2.2rem;
  font-weight: 900;
  text-decoration: none;
  color: #fff;
  margin-bottom: 12px;
}

.section_light .member-title {
  color: #232f3e;
}

.FAQ-accordion-item {
  padding-bottom: 30px;
}

.FAQ-accordion-header {
  font-size: 2.2rem;
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  display: flex;
  align-items: center;
}

.FAQ-accordion-header:hover {
  cursor: pointer;
  color: #f6b34f;
}

.FAQ-accordion-header::before {
  content: "+";
  color: #f6b34f;
  flex-shrink: 0;
  margin-right: 12px;
  transition: transform 0.3s ease-in-out;
}

.FAQ-accordion-header:not(.collapsed)::before {
  content: "-";
  transform: rotate(-180deg);
}

.FAQ-accordion-body {
  padding-left: 20px;
}

#organizing-team {
  background-image: url("./assets/img/grid.png");
  background-repeat: no-repeat;
}

.copyrigth {
  margin-top: 80px;
  text-align: center;
}

.mb-60 {
  margin-bottom: 60px;
}

.mt-50 {
  margin-top: 50px;
}

.mt-100 {
  margin-top: 100px;
}

@media screen and (max-width: 768px) {
  body.lock {
    overflow: hidden;
  }

  .cloud {
    background-size: cover;
  }

  .header-container {
    background-color: var(--dark-bg-color);
    border-bottom: 1px solid var(--primary-color);
  }

  .burger-menu {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 4rem;
    line-height: 4rem;
    margin: 0 20px;
    margin-left: auto;
    width: 30px;
    height: 30px;
  }

  .navbar ul {
    flex-direction: column;
    justify-content: center;
    position: fixed;
    width: 100%;
    height: 100%;
    top: -130%;
    left: 0;
    transition: all 0.3s ease 0s;
    background-color: var(--dark-bg-color);
    font-size: 3rem;
    padding: 20px 0;
    z-index: -1;
  }

  .navbar ul.active {
    top: 62px;
  }

  .navbar li {
    text-align: center;
    margin: 20px 0;
  }

  .navbar li:last-child {
    background: #ff9900;
  }

  .navbar li:last-child .menu-bay-tickets {
    color: #fff;
  }

  .navbar li a:hover,
  .navbar li a:active {
    color: white;
    background-color: var(--primary-color);
  }

  .location-container {
    flex-direction: column;
  }

  .location-description {
    margin-left: 0;
  }
}

#talks .section-title,
#workshops .section-title {
  margin-bottom: 32px;
  margin-top: 60px;
}

#agenda .section-title {
  font-weight: bolder;
}

.timeline-article {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
  margin: 20px 0;
}

.timeline-article .content-left-container,
.timeline-article .content-right-container {
  max-width: 44%;
  width: 100%;
}

.timeline-article .timeline-author {
  display: block;
  font-weight: 400;
  font-size: 14px;
  line-height: 24px;
  color: #ffffff;
  text-align: right;
}

.timeline-article .content-left,
.timeline-article .content-right {
  position: relative;
  width: auto;
  border: 1px solid #ddd;
  background-color: #f5f2ed;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
  padding: 27px 25px;
}

.timeline-article p {
  margin: 0 0 0 60px;
  padding: 0;
  font-weight: 400;
  color: #242424;
  font-size: 14px;
  line-height: 24px;
  position: relative;
}

.timeline-article p span.article-number {
  position: absolute;
  font-weight: 300;
  font-size: 24px;
  top: 1px;
  left: -60px;
  color: #ff9900;
}

.timeline-article .content-left-container {
  float: left;
}

.timeline-article .content-right-container {
  float: right;
}

.timeline-article .content-left:before,
.timeline-article .content-right:before {
  position: absolute;
  top: 22px;
  font-size: 23px;
  font-family: "FontAwesome";
  color: #f5f2ed;
}

.timeline-article .content-left:before {
  content: "\25ba";
  right: -12px;
}

.timeline-article .content-right:before {
  content: "\25ba";
  transform: rotate(180deg);
  left: -12px;
}

.timeline-article .meta-date {
  position: absolute;
  top: 0;
  left: 50%;
  width: 62px;
  height: 62px;
  margin-left: -31px;
  color: #fff;
  border-radius: 100%;
  background: #ff9900;
}

.timeline-article .meta-date .date,
.timeline-article .meta-date .month {
  display: block;
  text-align: center;
  font-weight: 400;
}

.timeline-article .meta-date .date {
  font-size: 22px;
  line-height: 40px;
}

.timeline-article .meta-date .month {
  font-size: 16px;
  line-height: 6px;
  text-transform: uppercase;
}

/*===== // Vertical Timeline =====*/

/*===== Resonsive Vertical Timeline =====*/
@media only screen and (max-width: 830px) {
  #conference-timeline .timeline-start,
  #conference-timeline .timeline-end {
    margin: 0;
  }

  #conference-timeline .conference-center-line {
    margin-left: 0;
    left: 50px;
  }

  .timeline-article .meta-date {
    margin-left: 0;
    left: 20px;
  }

  .timeline-article .content-left-container,
  .timeline-article .content-right-container {
    max-width: 100%;
    width: auto;
    float: none;
    margin-left: 110px;
    min-height: 53px;
  }

  .timeline-article .content-left-container {
    margin-bottom: 20px;
  }

  .timeline-article .content-left,
  .timeline-article .content-right {
    padding: 10px 25px;
    min-height: 65px;
  }

  .timeline-article .content-left:before {
    content: "\f0d9";
    right: auto;
    left: -8px;
  }

  .timeline-article .content-right:before {
    display: none;
  }
}

@media only screen and (max-width: 400px) {
  .timeline-article p {
    margin: 0;
  }

  .timeline-article p span.article-number {
    display: none;
  }
}

@media screen and (max-width: 500px) {
  .info-logo-img {
    width: 95%;
  }

  .member {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

.container-fluid .row {
  padding: 0 0 4em 0;
}

.container-fluid .row:nth-child(even) {
  background: #f1f4f5;
}

.timeline {
  line-height: 1.4em;
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
}

.timeline h1,
.timeline h2,
.timeline h3,
.timeline h4,
.timeline h5,
.timeline h6 {
  line-height: inherit;
}

.timeline-item {
  padding-left: 40px;
  position: relative;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-info {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  margin: 0 0 0.5em 0;
  text-transform: uppercase;
  white-space: nowrap;
}

.timeline-marker {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 15px;
}

.timeline-marker:before {
  background: #ff9900;
  border: 3px solid transparent;
  border-radius: 100%;
  content: "";
  display: block;
  height: 15px;
  position: absolute;
  top: 4px;
  left: 0;
  width: 15px;
  transition: background 0.3s ease-in-out, border 0.3s ease-in-out;
}

.timeline-marker:after {
  content: "";
  width: 3px;
  background: #ccd5db;
  display: block;
  position: absolute;
  top: 24px;
  bottom: 0;
  left: 6px;
}

.timeline-item:last-child .timeline-marker:after {
  content: none;
}

.timeline-item:not(.period):hover .timeline-marker:before {
  background: transparent;
  border: 3px solid #ff9900;
}

.timeline-content {
  padding-bottom: 40px;
}

.timeline-content p:last-child {
  margin-bottom: 0;
}

.period {
  padding: 0;
}

.period .timeline-info {
  display: none;
}

.period .timeline-marker:before {
  background: transparent;
  content: "";
  width: 15px;
  height: auto;
  border: none;
  border-radius: 0;
  top: 0;
  bottom: 30px;
  position: absolute;
  border-top: 3px solid #ccd5db;
  border-bottom: 3px solid #ccd5db;
}

.period .timeline-marker:after {
  content: "";
  height: 32px;
  top: auto;
}

.period .timeline-content {
  padding: 100px 0 70px;
}

.timeline-title {
  font-weight: bold;
  color: #ff9900;
  padding-bottom: 8px;
  margin-bottom: 4px;
}

.timeline-author {
  margin-bottom: 2px;
  font-weight: bold;
}

.timeline-position {
  color: #ddd;
}

.contact-link {
  display: flex;
  gap: 12px;
  align-items: center;
  color: #232f3e;
  margin-bottom: 12px;
}

.contact-link__red:hover {
  color: #e93e2c;
}

.contact-link__blue:hover {
  color: #0a66c2;
}

@media (min-width: 768px) {
  .timeline.timeline-authoreline,
  .timeline-centered .timeline {
    display: table;
  }

  .timeline-split .timeline-item,
  .timeline-centered .timeline-item {
    display: table-row;
    padding: 0;
  }

  .timeline-split .timeline-info,
  .timeline-centered .timeline-info,
  .timeline-split .timeline-marker,
  .timeline-centered .timeline-marker,
  .timeline-split .timeline-content,
  .timeline-centered .timeline-content,
  .timeline-split .period .timeline-info,
  .timeline-centered .period .timeline-info {
    display: table-cell;
    vertical-align: top;
  }

  .timeline-split .timeline-marker,
  .timeline-centered .timeline-marker {
    position: relative;
  }

  .timeline-split .timeline-content,
  .timeline-centered .timeline-content {
    padding-left: 30px;
  }

  .timeline-split .timeline-info,
  .timeline-centered .timeline-info {
    padding-right: 30px;
  }

  .timeline-split .period .timeline-title,
  .timeline-centered .period .timeline-title {
    position: relative;
    left: -45px;
  }
}

@media (min-width: 992px) {
  .timeline-centered,
  .timeline-centered .timeline-item,
  .timeline-centered .timeline-info,
  .timeline-centered .timeline-marker,
  .timeline-centered .timeline-content {
    display: block;
    margin: 0;
    padding: 0;
  }

  .timeline-centered .timeline-item {
    padding-bottom: 40px;
    overflow: hidden;
  }

  .timeline-centered .timeline-marker {
    position: absolute;
    left: 50%;
    margin-left: -7.5px;
  }

  .timeline-centered .timeline-info,
  .timeline-centered .timeline-content {
    width: 50%;
  }

  .timeline-centered > .timeline-item:nth-child(odd) .timeline-info {
    float: left;
    text-align: right;
    padding-right: 30px;
  }

  .timeline-centered > .timeline-item:nth-child(odd) .timeline-content {
    float: right;
    text-align: left;
    padding-left: 30px;
  }

  .timeline-centered > .timeline-item:nth-child(even) .timeline-info {
    float: right;
    text-align: left;
    padding-left: 30px;
  }

  .timeline-centered > .timeline-item:nth-child(even) .timeline-content {
    float: left;
    text-align: right;
    padding-right: 30px;
  }

  .timeline-centered > .timeline-item.period .timeline-content {
    float: none;
    padding: 0;
    width: 100%;
    text-align: center;
  }

  .timeline-centered .timeline-item.period {
    padding: 100px 0 90px;
  }

  .timeline-centered .period .timeline-marker:after {
    height: 30px;
    bottom: 0;
    top: auto;
  }

  .timeline-centered .period .timeline-title {
    left: auto;
  }
}

.marker-outline .timeline-marker:before {
  background: transparent;
  border-color: #ff9900;
}

.marker-outline .timeline-item:hover .timeline-marker:before {
  background: #ff9900;
}