/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #d32f1e;
  --text-color: #000;
  --bg-color: #fff;
  --bg-alt: #f5f5f5;
  --border-color: #e0e0e0;
}

html {
  scroll-behavior: smooth;
}

body {
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.6;
  font-family: sans-serif;
}
a { color: var(--text-color); }
a:hover { color: #555; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: box-shadow 0.3s ease;
}

.header.scrolled {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  width: 160px;
  height: auto;
  transition: opacity 0.3s ease;
}

.logo img {
  margin-top: 8px;
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background-color: var(--text-color);
  transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Section */
.hero {
  margin-top: 70px;
  background: url(../../images/bg-monotone.jpg) center top;
  background-size: cover;
  position: relative;
}
.hero-filter {
  background-color: rgba(211, 47, 30, 0.9);
  padding: 3rem 0 2rem;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 0;
  border-radius: 30px;
}

.hero-title {
  font-size: 1rem;
  letter-spacing: 3px;
  font-weight: 500;
  color: #fff;
  margin-bottom: .4rem;
  line-height: 1.2;
  text-align: center;
}
.hero-title img {
  width: 180px;
  height: auto;
  margin-bottom: 0.3rem;
}
.hero-topic {
  font-size: 1.8rem;
  text-align: center;
  color: #fff;
  font-weight: 500;
  margin-bottom: 1.4rem;
  line-height: 1.4;
}
.hero-topic span {
  font-size: 1.2rem;
  letter-spacing: 1px;
}

.hero-details {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.hero-detail {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.detail-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: #9c1919;
  border-radius: 5px;
  padding: 4px;
}

.detail-value {
  font-size: 1.125rem;
  font-weight: 500;
  color: #fff;
}

.cta-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background-color: var(--primary-color);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.cta-button:hover {
  background-color: #b71c1c;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(211, 47, 30, 0.3);
}

.cta-button-skeleton {
  display: inline-block;
  padding: 1rem 2.5rem;
  border: solid 1px #fff;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  border-radius: 4px;
  transition: all 0.3s ease;
}
.cta-button-skeleton:hover {
  transform: translateY(-2px);
  color: #fff;
}

/* Section Styles */
.section {
  padding: 5rem 0;
}

.section-alt {
  background-color: var(--bg-alt);
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-color);
}

/* About Section */
.about-content {
  max-width: 900px;
  margin: 0 auto;
}

.about-text {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: 3rem;
  text-align: center;
}
.about-text-hashtag{
  font-size: 1rem;
  line-height: 1.8;
  margin: 2rem 0 0;
  text-align: center;
}
.about-text-hashtag span{
  display: inline-block;
  padding: 3px 12px;
  margin-left: 10px;
  background: var(--bg-alt);
  border: solid 1px #DDD;
  border-radius: 5px;
  font-weight: bold;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.info-card {
  padding: 2rem;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: all 0.3s ease;
}

.info-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-4px);
}

.info-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.info-text {
  line-height: 1.8;
}

/* Schedule Section */
.schedule-text {
  text-align: center;
  font-size: 1.125rem;
  margin-bottom: 3rem;
}
.schedule-list {
  max-width: 800px;
  margin: 0 auto;
}

.schedule-item {
  display: flex;
  gap: 2rem;
  padding: 1.5rem;
  background-color: var(--bg-color);
  border-left: 3px solid var(--primary-color);
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.schedule-item:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateX(4px);
}

.schedule-item .schedule-item {
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
  border-left-width: 2px;
  background: var(--bg-alt);
}

.schedule-item .schedule-item:last-child{
  margin-bottom: 0;
}

.schedule-item .schedule-item:hover {
  transform: translateX(2px);
}

.schedule-item .schedule-item .schedule-title {
  font-size: 1rem;
  margin-bottom: 0.125rem;
}

.schedule-item .schedule-item .schedule-speaker {
  font-size: 0.8125rem;
}

.schedule-time {
  font-weight: 600;
  color: var(--primary-color);
  min-width: 140px;
  font-size: 1rem;
}

.schedule-content {
  flex: 1;
}

.schedule-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.schedule-speaker {
  color: #666;
  font-size: 0.875rem;
}

/* Speakers Section */
.speakers-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.program-subsection {
  margin-bottom: 4rem;
}

.program-subsection:last-child {
  margin-bottom: 0;
}

.program-subsection-title {
  max-width: 1000px;
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--primary-color);
  margin: 0 auto 2rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--primary-color);
}

.speaker-card {
  margin-bottom: 1.5rem;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  overflow: hidden;
  transition: all 0.3s ease;
}

.speaker-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-4px);
}

.speaker-number {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  color: #fff;
  background-color: var(--primary-color);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.speaker-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 1rem;
  line-height: 1.4;
}

.speaker-summary {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-color);
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.speaker-info {
  display: flex;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  align-items: flex-start;
}

.speaker-image {
  width: 120px;
  height: 120px;
  flex-shrink: 0;
  overflow: hidden;
  background-color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.speaker-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.speaker-details {
  flex: 1;
}

.speaker-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 0.5rem;
}

.speaker-bio {
  font-size: 0.875rem;
  line-height: 1.6;
  color: #666;
  margin-bottom: 0.75rem;
}

.speaker-social {
  display: flex;
  gap: 1rem;
}

.speaker-social a {
  color: var(--text-color);
  font-size: 1.25rem;
  transition: color 0.3s ease;
}

.speaker-social a:hover {
  color: var(--primary-color);
}

/* Sponsors Section */
.sponsors-text {
  text-align: center;
  font-size: 1.125rem;
  margin-bottom: 3rem;
}

.sponsors-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(200px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.sponsor-card {
  padding: 1rem;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}
.sponsor-card:hover{
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-4px);
}
.sponsor-card a{
  text-decoration: none;
}

.sponsor-placeholder {
  color: #999;
  font-weight: 500;
  text-align: center;
}
.sponsor-placeholder img {
  width: 180px;
  height: auto;
}
.sponsors-logo{
  text-align: center;
  margin-top: 3rem;
}

/* Organizers Section */
.organizers-content {
  max-width: 800px;
  margin: 0 auto;
}

.organizers-text {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: 3rem;
  text-align: center;
}

.organizers-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.organizer-item {
  padding: 2rem;
  background-color: var(--bg-color);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}
.organizer-item ul {
  padding-left: 20px;
}

.organizer-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.organizer-text {
  line-height: 1.8;
}

/* Community Logos Section */
.community-logos {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 600px;
  margin: 0 auto 3rem;
}

.community-logo {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-color);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  min-height: 200px;
}

.community-logo:hover {
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-4px);
}

.community-logo img {
  width: 100%;
  height: auto;
  max-width: 120px;
  margin-top: -40px;
}

.community-name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
  background-color: rgba(255, 255, 255, 0.95);
  padding: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0 0 8px 8px;
}

/* Footer */
.footer {
  padding: 2rem 0;
  background-color: var(--text-color);
  color: #fff;
}
.footer a {
  color: white;
}
.footer-text {
  text-align: center;
}

/* Responsive Design */
@media (max-width: 940px) {
  .nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--bg-color);
    padding: 1rem;
    gap: 0;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-link::after {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-details {
    gap: 1.5rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .schedule-item {
    flex-direction: column;
    gap: 0.5rem;
  }

  .schedule-time {
    min-width: auto;
  }

  .info-grid,
  .sponsors-grid,
  .organizers-info {
    grid-template-columns: 1fr;
  }
  .community-logos {
    grid-template-columns: 1fr;
    max-width: 300px;
  }

  /* Responsive styles for speaker cards */
  .speaker-header {
    flex-direction: column;
    text-align: center;
  }

  .speaker-image {
    width: 120px;
    height: 120px;
  }

  .speaker-title {
    font-size: 1.5rem;
  }

  .speaker-summary {
    font-size: 0.9375rem;
  }

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

  .speaker-social {
    justify-content: center;
  }

  .team-grid {
    grid-template-columns: 1fr !important;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-details {
    flex-direction: column;
    gap: 1rem;
  }

  .section {
    padding: 3rem 0;
  }

  .page-hero h1 {
    font-size: 1.5rem;
  }

  .page-content {
    padding: 3rem 0;
  }

  .page-text h2 {
    font-size: 1.5rem;
  }

  .page-content .page-text h2:first-child {
    margin-top: 0;
  }

  /* Responsive table styles */
  .info-table {
    font-size: 0.875rem;
  }

  .info-table th,
  .info-table td {
    padding: 0.75rem;
  }

  .info-table th {
    width: 35%;
  }

  .about-text{
    text-align: center;
  }
  .detail-label{
    width: 150px;
    margin: 0 auto;
  }

  .page-hero{
    padding: 4rem 0 3rem;
  }
}

/* subpage */
.subpage-content {
  margin-top: 70px;
}

.page-hero {
  background-color: var(--primary-color);
  padding: 2rem 0;
  text-align: center;
}

.page-hero h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  margin: 0;
}

.page-content {
  padding: 5rem 0;
  max-width: 800px;
  margin: 0 auto;
}

.page-text {
  line-height: 1.8;
}

.page-text .lead {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 2rem;
}

.page-text p {
  margin-bottom: 1.5rem;
}

.page-text h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-top: 3rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary-color);
}

.page-list {
  margin: 1.5rem 0;
  padding-left: 2rem;
}

.page-list li {
  margin-bottom: 1rem;
  line-height: 1.8;
}

.page-text .highlight {
  background-color: #fff3e0;
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--primary-color);
  font-weight: 500;
  margin: 2rem 0;
}

.subpage-content ul {
  padding-left: 20px;
}

.contact-info {
  margin-top: 3rem;
  padding: 1.5rem;
  background-color: var(--bg-alt);
  border-radius: 8px;
}
.contact-info p{
  margin-bottom: 0;
}

/* CFP Page Styles */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
}

.info-table th,
.info-table td {
  padding: 1rem;
  border: 1px solid var(--border-color);
  text-align: left;
  vertical-align: top;
}

.info-table th {
  background-color: var(--bg-alt);
  font-weight: 600;
  width: 30%;
  color: var(--text-color);
}

.info-table td {
  line-height: 1.8;
}

.info-table a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.info-table a:hover {
  text-decoration: underline;
}

.info-table tbody tr td:first-child {
  font-weight: 500;
}

.info-table tbody tr td:last-child {
  color: #666;
}

/* Access Page Styles */
.access-map {
  margin: 1.5rem 0;
  text-align: center;
}

.access-map a {
  display: inline-block;
  transition: opacity 0.3s ease;
}

.access-map a:hover {
  opacity: 0.8;
}

.subsection-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-color);
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.cta-link {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--primary-color);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  border-radius: 4px;
  transition: all 0.3s ease;
  margin: 0.5rem 0;
}

.cta-link:hover {
  background-color: #b71c1c;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(211, 47, 30, 0.3);
}

/* Added disabled state for CTA links */
.cta-link.disabled {
  background-color: #999;
  color: #fff;
  cursor: not-allowed;
  pointer-events: none;
  opacity: 0.6;
}

.cta-link.disabled:hover {
  background-color: #999;
  transform: none;
  box-shadow: none;
}

/* Team Page Styles */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(160px, 1fr));
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.organizer-card {
  padding: 1rem;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: all 0.3s ease;
}
.organizer-card:hover{
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-4px);
}
.organizer-card a {
  text-decoration: none;
}

.organizer-info {
  font-weight: 500;
}

.organizer-image {
  width: 120px;
  height: 120px;
  margin: 0 auto 15px;
  overflow: hidden;
  background-color: #fff;
  border-radius: 8px;
}
.organizer-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.organizer-role {
  color: #666;
}

.organizer-name {
  font-size: 1rem;
  font-weight: 600;
}

.organizer-social {
  display: flex;
  gap: 1rem;
}
.organizer-social a {
  color: var(--text-color);
  font-size: 1.25rem;
  transition: color 0.3s ease;
}
.organizer-social a:hover {
  color: var(--primary-color);
}

.registration {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
}

.registration > a {
    display: inline-block;
    width: 14rem;
}