/* ===========================
   CSS Reset & Base Styles
   =========================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===========================
   Navigation
   =========================== */

.navbar {
  position: sticky;
  top: 0;
  background-color: #0d47a1;
  color: white;
  padding: 1rem 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.nav-brand h1 {
  font-size: 1.5rem;
  font-weight: 600;
}

.nav-brand {
  background: white;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.nav-logo {
  height: 60px;
  width: auto;
  display: block;
  transition: transform 0.3s ease, filter 0.3s ease;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
  border-radius: 8px;
}

.nav-logo:hover {
  transform: scale(1.05);
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
  transition: all 0.3s ease;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.hamburger {
  display: block;
  width: 25px;
  height: 3px;
  background: white;
  position: relative;
  transition: all 0.3s ease;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 25px;
  height: 3px;
  background: white;
  transition: all 0.3s ease;
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  top: 8px;
}

.nav-toggle.active .hamburger {
  background: transparent;
}

.nav-toggle.active .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}

.nav-toggle.active .hamburger::after {
  transform: rotate(-45deg);
  top: 0;
}

.nav-link {
  color: white;
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: #00bcd4;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: #00bcd4;
}

/* ===========================
   Enhanced Hero Section
   =========================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #0d47a1 0%, #1565c0 50%, #00bcd4 100%);
}

.hero-video-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.video-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.hero-video {
  position: absolute;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  transform: translate(-50%, -50%);
  object-fit: cover;
  opacity: 0.3;
}

.video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(13, 71, 161, 0.9) 0%, rgba(0, 188, 212, 0.8) 100%);
  z-index: 2;
}

.hero-container {
  position: relative;
  z-index: 3;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero-content {
  display: flex;
  align-items: center;
  min-height: 100vh;
}

.hero-text {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-title {
  font-size: 4.5rem;
  font-weight: 900;
  color: white;
  margin-bottom: 2rem;
  line-height: 1.1;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 1s ease-out;
}

.hero-dates {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.date-badge, .location-badge {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(15px);
  color: white;
  padding: 1rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.1rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: all 0.3s ease;
  animation: fadeInUp 1s ease-out 0.2s both;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.date-badge:hover, .location-badge:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.2);
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-cta .btn-primary {
  min-width: 200px;
  padding: 1.25rem 2.5rem;
  font-size: 1.1rem;
  background: linear-gradient(135deg, #00bcd4 0%, #0097a7 100%);
  border: none;
  border-radius: 50px;
  color: white;
  font-weight: 700;
  transition: all 0.3s ease;
  box-shadow: 0 10px 30px rgba(0, 188, 212, 0.4);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-cta .btn-primary:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 40px rgba(0, 188, 212, 0.5);
  background: linear-gradient(135deg, #0097a7 0%, #00838f 100%);
}

.hero-cta .btn-secondary {
  min-width: 200px;
  padding: 1.25rem 2.5rem;
  font-size: 1.1rem;
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 50px;
  color: white;
  font-weight: 700;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-cta .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: white;
  transform: translateY(-4px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===========================
   Enhanced Sections
   =========================== */

.video-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 0;
  overflow: hidden;
  background: #020617;
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0, 8, 20, 0.18), rgba(0, 10, 25, 0.6));
  pointer-events: none;
}

@media (max-width: 992px) {
  .hero {
    padding: 5.75rem 0 3rem 0;
    min-height: 90vh;
  }

  .hero-container {
    padding: 0 16px;
    align-items: flex-start;
  }

  .hero-content {
    max-width: 100%;
    padding: 0 0.5rem;
  }

  .hero-title {
    font-size: 2.6rem;
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 5.25rem 0 3rem 0;
    min-height: 100vh;
  }

  .hero-container {
    align-items: flex-start;
  }

  .hero-content {
    padding: 0 0.5rem 1.5rem 0.5rem;
    text-align: left;
    margin-bottom: 1.5rem;
  }

  .hero-title {
    font-size: 2.1rem;
    line-height: 1.2;
  }

  .hero-subtitle {
    font-size: 0.98rem;
  }

  .hero-dates {
    justify-content: flex-start;
  }

  .hero-cta {
    justify-content: flex-start;
  }

  .video-wrapper {
    max-width: 100%;
    border-radius: 22px;
  }

  .btn {
    padding: 0.75rem 1.3rem;
    font-size: 0.9rem;
  }
}

/* ===========================
   Buttons
   =========================== */

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 5px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
}

.btn-primary {
  background-color: #00bcd4;
  color: white;
}

.btn-primary:hover {
  background-color: #0097a7;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 188, 212, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background-color: white;
  color: #0d47a1;
  transform: translateY(-2px);
}

/* ===========================
   About Section - Clean & Simple Design
   =========================== */

.about {
  padding: 5rem 0;
  background: linear-gradient(135deg, #0d47a1 0%, #1565c0 100%);
  position: relative;
}

.about::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%230d47a1' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
  z-index: 0;
}

.about .container {
  position: relative;
  z-index: 1;
}

.about-header {
  text-align: center;
  margin-bottom: 3rem;
}

.about-logo {
  display: inline-block;
  padding: 2rem 3rem;
  background: white;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(13, 71, 161, 0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-logo:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 50px rgba(13, 71, 161, 0.2);
}

.about-logo img {
  max-width: 250px;
  height: auto;
  display: block;
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
}

.about-card {
  background: white;
  border-radius: 20px;
  padding: 3rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  border-top: 4px solid #00bcd4;
}

.about-card h2 {
  font-size: 2rem;
  font-weight: 700;
  color: #0d47a1;
  margin-bottom: 2rem;
  text-align: center;
  position: relative;
  padding-bottom: 1rem;
}

.about-card h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #00bcd4, #0d47a1);
  border-radius: 2px;
}

.about-card p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #4a5568;
  margin-bottom: 1.5rem;
  text-align: justify;
}

.about-card p:last-child {
  margin-bottom: 0;
}

.about-card strong {
  color: #0d47a1;
  font-weight: 600;
}

.about-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.feature-item {
  text-align: center;
  padding: 1.5rem;
  background: white;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #0d47a1 0%, #00bcd4 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.5rem;
  color: white;
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: #0d47a1;
  margin-bottom: 0.5rem;
}

.feature-description {
  font-size: 0.95rem;
  color: #6b7280;
  line-height: 1.5;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.highlight {
  background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-left: 5px solid #00bcd4;
  position: relative;
  overflow: hidden;
}

.highlight::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(0, 188, 212, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  transform: translate(30px, -30px);
}

.highlight:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
  border-left-color: #0d47a1;
}

.highlight h4 {
  font-size: 1.2rem;
  color: #0d47a1;
  margin-bottom: 0.7rem;
  font-weight: 600;
  position: relative;
  z-index: 1;
}

.highlight p {
  font-size: 0.95rem;
  color: #666;
  line-height: 1.6;
  margin-bottom: 0;
  position: relative;
  z-index: 1;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }

  .about h2 {
    font-size: 1.8rem;
  }
}

/* ===========================
   Registration Section
   =========================== */

.registration {
  padding: 5rem 0;
  background: linear-gradient(135deg, #0d47a1 0%, #1565c0 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.registration::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.registration-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.registration-text h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  color: white;
  font-weight: 700;
}

.registration-text p {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.9);
}

.registration-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.highlight-icon {
  font-size: 1.25rem;
  min-width: 24px;
}

.registration-cta {
  text-align: center;
  padding: 2.5rem;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.registration-cta h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: white;
}

.registration-cta p {
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.8);
}

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  min-width: 200px;
  background-color: #00bcd4;
  color: white;
  border: none;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 188, 212, 0.3);
}

.btn-large:hover {
  background-color: #0097a7;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 188, 212, 0.4);
  color: white;
  text-decoration: none;
}

.registration-note {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 1rem;
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .registration-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .registration-text h2 {
    font-size: 2rem;
  }

  .registration-highlights {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .registration-cta {
    padding: 2rem;
  }

  .btn-large {
    padding: 0.875rem 2rem;
    font-size: 1rem;
    min-width: 180px;
  }
}

@media (max-width: 480px) {
  .registration {
    padding: 3rem 0;
  }

  .registration-text h2 {
    font-size: 1.75rem;
  }

  .registration-text p {
    font-size: 1rem;
  }

  .highlight-item {
    font-size: 0.9rem;
  }
}

/* ===========================
   Topics Section
   =========================== */

.topics {
  padding: 5rem 0;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  position: relative;
  overflow: hidden;
}

.topics::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 188, 212, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
}

.topics::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(13, 71, 161, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
}

.topics .container {
  position: relative;
  z-index: 1;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
  counter-reset: topic-counter;
}

.topic-card {
  background: white;
  padding: 2.5rem 2rem;
  border-radius: 16px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(13, 71, 161, 0.08);
}

.topic-card::before {
  content: counter(topic-counter);
  counter-increment: topic-counter;
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #00bcd4 0%, #0d47a1 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2;
}

.topic-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #00bcd4 0%, #0d47a1 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.topic-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
  border-color: rgba(0, 188, 212, 0.3);
}

.topic-card:hover::before {
  opacity: 1;
  transform: scale(1);
}

.topic-card:hover::after {
  transform: scaleX(1);
}

.topic-card h3 {
  color: #0d47a1;
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  position: relative;
  z-index: 1;
  transition: color 0.3s ease;
}

.topic-card:hover h3 {
  color: #00bcd4;
}

.topic-card:nth-child(1) { background: linear-gradient(135deg, #ffffff 0%, #f0f8ff 100%); }
.topic-card:nth-child(2) { background: linear-gradient(135deg, #ffffff 0%, #f5f5ff 100%); }
.topic-card:nth-child(3) { background: linear-gradient(135deg, #ffffff 0%, #f8fff8 100%); }
.topic-card:nth-child(4) { background: linear-gradient(135deg, #ffffff 0%, #fff8f0 100%); }
.topic-card:nth-child(5) { background: linear-gradient(135deg, #ffffff 0%, #f8f0ff 100%); }
.topic-card:nth-child(6) { background: linear-gradient(135deg, #ffffff 0%, #fff0f8 100%); }
.topic-card:nth-child(7) { background: linear-gradient(135deg, #ffffff 0%, #f0fff8 100%); }
.topic-card:nth-child(8) { background: linear-gradient(135deg, #ffffff 0%, #f8f5ff 100%); }
.topic-card:nth-child(9) { background: linear-gradient(135deg, #ffffff 0%, #fffaf0 100%); }
.topic-card:nth-child(10) { background: linear-gradient(135deg, #ffffff 0%, #f0f8ff 100%); }

/* ===========================
   Registration Section
   =========================== */

.registration {
  padding: 6rem 0;
  background: linear-gradient(135deg, #0d47a1 0%, #1565c0 100%);
  color: white;
}

.registration-form {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
  background: white;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: #0d47a1;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
  background: white;
  color: #333;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #00bcd4;
  box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.1);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.submit-btn {
  background: linear-gradient(135deg, #0d47a1 0%, #00bcd4 100%);
  color: white;
  padding: 1rem 2rem;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  width: 100%;
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 188, 212, 0.3);
}

.template-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: linear-gradient(135deg, #0d47a1 0%, #1565c0 100%);
  color: white;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(13, 71, 161, 0.3);
  position: relative;
  overflow: hidden;
}

.template-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.template-btn:hover::before {
  left: 100%;
}

.template-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(13, 71, 161, 0.4);
  background: linear-gradient(135deg, #1565c0 0%, #0d47a1 100%);
}

.btn-icon {
  font-size: 1.2rem;
  animation: bounce 2s infinite;
}

.btn-text {
  position: relative;
  z-index: 1;
}

.btn-arrow {
  font-size: 1rem;
  transition: transform 0.3s ease;
}

.template-btn:hover .btn-arrow {
  transform: translateY(2px);
}

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ===========================
   Program Section
   =========================== */

.program {
  padding: 5rem 0;
  background: linear-gradient(135deg, #0d47a1 0%, #1565c0 100%);
  color: white;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.program-description {
  font-size: 1.2rem;
  color: white;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
  text-align: center;
}

.program-download {
  text-align: center;
}

.program-btn {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  background: linear-gradient(135deg, #0d47a1 0%, #1565c0 100%);
  color: white;
  text-decoration: none;
  padding: 1.25rem 2.5rem;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 10px 30px rgba(13, 71, 161, 0.3);
  position: relative;
  overflow: hidden;
}

.program-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.program-btn:hover::before {
  left: 100%;
}

.program-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(13, 71, 161, 0.4);
  background: linear-gradient(135deg, #1565c0 0%, #0d47a1 100%);
}

.btn-icon {
  font-size: 1.5rem;
  animation: bounce 2s infinite;
}

.btn-text {
  position: relative;
  z-index: 1;
}

.btn-arrow {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
}

.program-btn:hover .btn-arrow {
  transform: translateX(5px);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-5px);
  }
  60% {
    transform: translateY(-3px);
  }
}

.program-schedule {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.program-day {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.day-title {
  color: #0d47a1;
  margin-bottom: 1.5rem;
  font-size: 1.4rem;
  border-bottom: 3px solid #00bcd4;
  padding-bottom: 0.5rem;
}

.schedule-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid #eee;
}

.schedule-item:last-child {
  border-bottom: none;
}

.time {
  font-weight: 600;
  color: #00bcd4;
  font-size: 0.9rem;
}

.session h4 {
  color: #0d47a1;
  margin-bottom: 0.3rem;
}

.session p {
  color: #666;
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .program-schedule {
    grid-template-columns: 1fr;
  }
}

/* ===========================
   Enhanced Speakers Section
   =========================== */

.speakers {
  padding: 5rem 0;
}

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2.5rem;
}

.speaker-card {
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  border: 1px solid rgba(13, 71, 161, 0.1);
  position: relative;
}

.speaker-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 20px 40px rgba(13, 71, 161, 0.2);
  border-color: var(--secondary-color);
}

.speaker-image {
  position: relative;
  width: 100%;
  height: 280px;
  overflow: hidden;
  background: linear-gradient(135deg, #0d47a1, #1565c0);
}

.speaker-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.speaker-card:hover .speaker-image img {
  transform: scale(1.1);
}

.speaker-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, transparent 0%, rgba(13, 71, 161, 0.8) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 2rem;
}

.speaker-card:hover .speaker-overlay {
  opacity: 1;
}

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

.social-link {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 1.2rem;
  transition: all 0.3s ease;
}

.social-link:hover {
  background: var(--secondary-color);
  transform: scale(1.1);
}

.speaker-content {
  padding: 2rem;
}

.speaker-content h3 {
  color: #0d47a1;
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

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

.speaker-affiliation {
  color: #666;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.speaker-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: rgba(13, 71, 161, 0.05);
  border-radius: 8px;
  border-left: 4px solid var(--secondary-color);
}

.stat {
  text-align: center;
  flex: 1;
  min-width: 60px;
}

.stat-number {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.8rem;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.speaker-bio {
  color: #555;
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.speaker-expertise {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.expertise-tag {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.expertise-tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(13, 71, 161, 0.3);
}

@media (max-width: 768px) {
  .speakers-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .speaker-card {
    border-radius: 12px;
  }

  .speaker-image {
    height: 240px;
  }

  .speaker-content {
    padding: 1.5rem;
  }

  .speaker-content h3 {
    font-size: 1.2rem;
  }

  .speaker-stats {
    gap: 1rem;
  }

  .stat-number {
    font-size: 1.2rem;
  }
}

/* ===========================
   Biography Button
   =========================== */

.bio-btn {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 25px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 1rem;
  width: 100%;
}

.bio-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(13, 71, 161, 0.3);
}

/* ===========================
   Biography Modal
   =========================== */

.bio-modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
}

.bio-modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease-out;
}

.modal-content {
  background: white;
  border-radius: 16px;
  max-width: 700px;
  width: 90%;
  max-height: 80vh;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.3s ease-out;
}

.modal-header {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
  padding: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
}

.close-modal {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  font-size: 2rem;
  font-weight: 300;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.close-modal:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

.modal-body {
  padding: 2rem;
  max-height: 60vh;
  overflow-y: auto;
}

.modal-bio {
  line-height: 1.8;
  color: #555;
  font-size: 1rem;
}

.modal-bio p {
  margin-bottom: 1.5rem;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .modal-content {
    width: 95%;
    max-height: 90vh;
  }

  .modal-header {
    padding: 1.5rem;
  }

  .modal-header h2 {
    font-size: 1.2rem;
  }

  .modal-body {
    padding: 1.5rem;
  }

  .close-modal {
    width: 35px;
    height: 35px;
    font-size: 1.5rem;
  }
}

.scientific-committee {
  padding: 5rem 0;
  background-color: #f5f5f5;
}

.committee-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.committee-member {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border-left: 4px solid #00bcd4;
}

.committee-member:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.committee-member h3 {
  color: #0d47a1;
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.member-title {
  color: #00bcd4;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.member-affiliation {
  color: #666;
  font-size: 0.9rem;
}

/* ===========================
   Venue Section
   =========================== */

.venue {
  padding: 5rem 0;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.venue-content {
  text-align: center;
}

.venue-logo {
  margin-bottom: 3rem;
}

.venue-logo img {
  max-width: 400px;
  height: auto;
  display: block;
  margin: 0 auto;
}

.venue-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.venue-card {
  background: white;
  border-radius: 15px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: center;
}

.venue-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.um6p-card {
  border-top: 4px solid #0d47a1;
}

.msn-card {
  border-top: 4px solid #00bcd4;
}

.venue-card-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: #0d47a1;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.venue-card-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #4a5568;
  text-align: justify;
}

@media (max-width: 992px) {
  .venue-cards {
    grid-template-columns: 1fr;
  }
  
  .venue-logo img {
    max-width: 350px;
  }
}

/* ===========================
   Venue Section
   =========================== */

.venue {
  padding: 5rem 0;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.venue-content {
  text-align: center;
}

.venue-logo {
  margin-bottom: 3rem;
}

.venue-logo img {
  max-width: 400px;
  height: auto;
  display: block;
  margin: 0 auto;
}

.venue-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.venue-card {
  background: white;
  border-radius: 15px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: center;
}

.venue-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.um6p-card {
  border-top: 4px solid #0d47a1;
}

.msn-card {
  border-top: 4px solid #00bcd4;
}

.venue-card-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: #0d47a1;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.venue-card-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #4a5568;
  text-align: justify;
}

@media (max-width: 992px) {
  .venue-cards {
    grid-template-columns: 1fr;
  }
  
  .venue-logo img {
    max-width: 300px;
  }
}

/* ===========================
   Organizing Committee Section
   =========================== */

.organizing-info-section {
  margin-bottom: 3rem;
  text-align: center;
}

.institution-logo {
  margin-bottom: 3rem;
}

.institution-logo img {
  max-width: 400px;
  height: auto;
  display: block;
  margin: 0 auto;
}

.institution-descriptions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.institution-card {
  background: white;
  border-radius: 15px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: center;
}

.institution-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.institution-card:first-child {
  border-top: 4px solid #0d47a1;
}

.institution-card:last-child {
  border-top: 4px solid #00bcd4;
}

.institution-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: #0d47a1;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.institution-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #4a5568;
  text-align: justify;
}

@media (max-width: 992px) {
  .institution-descriptions {
    grid-template-columns: 1fr;
  }
  
  .institution-logo img {
    max-width: 300px;
  }
}

.organizing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.organizing-member {
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
  text-align: center;
  transition: all 0.3s ease;
}

.organizing-member:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.member-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 1rem;
  border: 4px solid #00bcd4;
  box-shadow: 0 8px 25px rgba(0, 188, 212, 0.3);
  transition: all 0.3s ease;
  position: relative;
  background: #f8f9fa;
}

.member-photo::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 188, 212, 0.1) 0%, transparent 100%);
  border-radius: 50%;
  z-index: 1;
}

.member-photo:hover {
  transform: scale(1.05);
  border-color: #0d47a1;
  box-shadow: 0 12px 35px rgba(0, 188, 212, 0.4);
}

.member-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.3s ease;
  position: relative;
  z-index: 0;
}

.member-photo:hover img {
  transform: scale(1.1);
}

.organizing-member h3 {
  color: #0d47a1;
  padding-top: 1rem;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.organizing-member .member-title {
  color: #00bcd4;
  font-size: 0.9rem;
  margin: 0.5rem 1rem;
}

.organizing-member .member-affiliation {
  color: #666;
  font-size: 0.85rem;
  padding: 0 1rem 1.5rem;
}

/* ===========================
   Dates Section
   =========================== */

.dates {
  padding: 5rem 0;
  background-color: #f5f5f5;
}

.dates-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.date-item {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-left: 4px solid #00bcd4;
}

.date-label {
  color: #666;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
}

.date-value {
  color: #0d47a1;
  font-size: 1.3rem;
  font-weight: 700;
}

/* ===========================
   Contact Section
   =========================== */

.contact {
  padding: 5rem 0;
  background: linear-gradient(135deg, #0d47a1 0%, #1565c0 100%);
  color: white;
}

.contact h2 {
  color: white;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-info h3 {
  margin-bottom: 1.5rem;
  font-size: 1.4rem;
}

.contact-details {
  margin-top: 1.5rem;
}

.contact-details p {
  margin-bottom: 1rem;
  line-height: 1.8;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-form input,
.contact-form textarea {
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 5px;
  font-size: 1rem;
  font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.3);
}

@media (max-width: 768px) {
  .contact-content {
    grid-template-columns: 1fr;
  }
}

/* ===========================
   Footer
   =========================== */

.footer {
  background-color: #0d47a1;
  color: white;
  text-align: center;
  padding: 2rem 0;
  margin-top: 0;
}

.footer p {
  margin: 0.5rem 0;
  font-size: 0.95rem;
}

/* ===========================
   Animations
   =========================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

section {
  animation: fadeIn 0.6s ease-out;
}

/* ===========================
   Mobile Navigation
   =========================== */

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
  }
  
  .navbar .container {
    position: relative;
    justify-content: center;
    padding: 1rem;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 300px;
    height: 100vh;
    background: #0d47a1;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    padding: 5rem 1.5rem 2rem;
    gap: 0;
    z-index: 1000;
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.2);
    transition: right 0.3s ease;
    margin: 0;
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-link {
    font-size: 1rem;
    width: 100%;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: block;
  }
  
  .nav-link:last-child {
    border-bottom: none;
  }
  
  .nav-brand {
    z-index: 1001;
    position: relative;
  }
}

@media (max-width: 480px) {
  .nav-logo {
    height: 45px;
  }
  
  .nav-menu {
    width: 80%;
    padding: 5rem 1.5rem 2rem;
  }
  
  .nav-link {
    font-size: 1rem;
  }
}

@media (max-width: 768px) {
  .navbar .container {
    flex-direction: row;
    justify-content: space-between;
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .navbar .container {
    padding: 0.75rem 1rem;
  }
}

/* ===========================
   Enhanced UX Interactions
   =========================== */

/* Smooth scroll behavior */
html {
  scroll-behavior: smooth;
}

/* Focus states for accessibility */
.btn:focus,
.nav-link:focus,
input:focus,
textarea:focus {
  outline: 2px solid var(--secondary-color);
  outline-offset: 2px;
}

/* Loading states */
.btn.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid white;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Card hover enhancements */
.topic-card,
.speaker-card,
.committee-member,
.organizing-member {
  transform: translateY(0);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.topic-card:hover,
.speaker-card:hover,
.committee-member:hover,
.organizing-member:hover {
  transform: translateY(-4px);
}

/* Button hover improvements */
.btn {
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

/* Improved form styling */
.contact-form input,
.contact-form textarea {
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--secondary-color);
  transform: translateY(-2px);
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-color);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 1000;
}

.skip-link:focus {
  top: 6px;
}

/* ===========================
   Global Responsive Design
   =========================== */

/* Mobile First Approach */
@media (max-width: 1200px) {
  .container {
    padding: 0 15px;
  }
  
  .about-grid {
    gap: 3rem;
  }
  
  .about-text h2 {
    font-size: 2.5rem;
  }
  
  .hero-title {
    font-size: 3.5rem !important;
  }
}

@media (max-width: 992px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }
  
  .about-text {
    padding-right: 0;
    padding: 1rem;
  }
  
  .about-text h2 {
    font-size: 2.2rem;
  }
  
  .about-text h2::after {
    left: 50%;
    transform: translateX(-50%);
  }
  
  .about-text p:hover {
    transform: none;
  }
  
  .about-text p::before {
    display: none;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .topics-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
  
  .speakers-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

@media (max-width: 768px) {
  .registration {
    padding: 3rem 0;
  }
  
  .about {
    padding: 4rem 0;
  }
  
  .about-text h2 {
    font-size: 2rem;
  }
  
  .about-text p {
    font-size: 1.05rem;
  }
  
  .topics-grid {
    grid-template-columns: 1fr;
  }
  
  .speakers-grid {
    grid-template-columns: 1fr;
  }
  
  .committee-grid,
  .organizing-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }
  
  .nav-logo {
    height: 50px;
    padding: 6px;
  }
  
  .nav-menu {
    gap: 1rem;
    font-size: 0.9rem;
  }
  
  .hero-title {
    font-size: 2.8rem !important;
  }
  
  .section-title {
    font-size: 2.2rem !important;
  }
}

@media (max-width: 576px) {
  .hero-title {
    font-size: 2.2rem !important;
  }
  
  .about-text h2 {
    font-size: 1.8rem;
  }
  
  .section-title {
    font-size: 2rem !important;
  }
  
  .submit-btn,
  .template-btn {
    padding: 1rem 1.5rem;
    font-size: 1rem;
  }
  
  .registration-form {
    padding: 1.5rem;
  }
  
  .about::before,
  .about::after {
    width: 300px;
    height: 300px;
  }
  
  .hero-cta {
    flex-direction: column;
    gap: 1rem;
  }
  
  .btn {
    width: 100%;
    padding: 1rem 2rem;
  }
  
  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .nav-brand {
    flex: 1 1 100%;
    text-align: center;
    margin-bottom: 1rem;
  }
}

@media (max-width: 480px) {
  .nav-menu {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .nav-logo {
    height: 40px;
    padding: 4px;
  }
  
  .hero-content {
    padding: 2rem 1rem;
  }
  
  .about-text {
    padding: 1rem;
  }
  
  .registration-form {
    padding: 1rem;
  }
  
  .form-group input,
  .form-group select {
    padding: 0.6rem;
  }
  
  .template-btn {
    font-size: 0.9rem;
    padding: 0.6rem 1rem;
  }
  
  .member-photo {
    width: 80px;
    height: 80px;
  }
  
  .organizing-member h3,
  .committee-member h3 {
    font-size: 1rem;
  }
  
  .organizing-member p,
  .committee-member p {
    font-size: 0.85rem;
  }
}

/* Print styles */
@media print {
  .navbar,
  .hero-cta,
  .speaker-overlay,
  .bio-btn,
  .contact-form {
    display: none !important;
  }

  .hero {
    background: white !important;
    color: #333 !important;
    padding: 2rem 0 !important;
  }

  .hero-content {
    background: transparent !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.4;
  }

  .section-title {
    page-break-after: avoid;
    break-inside: avoid;
  }

  .speaker-card,
  .topic-card {
    break-inside: avoid;
    page-break-inside: avoid;
  }
}

/* ===========================
   Enhanced Typography
   =========================== */

body {
  font-family: "Inter", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.7;
}

.hero-title {
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-title {
  font-weight: 700;
  letter-spacing: -0.01em;
  text-align: center;
}

/* ===========================
   Professional Color Scheme
   =========================== */

:root {
  --primary-color: #0d47a1;
  --secondary-color: #00bcd4;
  --accent-color: #1565c0;
  --text-primary: #333;
  --text-secondary: #666;
  --text-light: #999;
  --background-light: #f5f5f5;
  --background-white: #ffffff;
}

/* ===========================
   Enhanced Shadows and Borders
   =========================== */

.topic-card,
.speaker-card,
.committee-member,
.organizing-member {
  border: 1px solid rgba(13, 71, 161, 0.1);
}

.topic-card:hover,
.speaker-card:hover,
.committee-member:hover,
.organizing-member:hover {
  border-color: var(--secondary-color);
}

/* ===========================
   Loading Animation
   =========================== */

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.loading {
  animation: pulse 1.5s ease-in-out infinite;
}

/* ===========================
   Enhanced Navigation Mobile
   =========================== */

@media (max-width: 768px) {
  .navbar .container {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem 0;
  }

  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    max-width: 100%;
  }

  .nav-link {
    font-size: 0.8rem;
    padding: 0.5rem 0.75rem;
    border-radius: 20px;
    transition: all 0.3s ease;
  }

  .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
  }

  .nav-brand h1 {
    font-size: 1.3rem;
    text-align: center;
  }
}

/* ===========================
   Enhanced Topics Mobile
   =========================== */

@media (max-width: 768px) {
  .topics-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .topic-card {
    padding: 1.5rem;
  }

  .topic-card h3 {
    font-size: 1.1rem;
  }

  .topic-card p {
    font-size: 0.9rem;
  }
}

/* ===========================
   Enhanced Speakers Mobile
   =========================== */

@media (max-width: 768px) {
  .speakers-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .speaker-card {
    border-radius: 12px;
  }

  .speaker-image {
    height: 200px;
  }

  .speaker-content {
    padding: 1.5rem;
  }

  .speaker-content h3 {
    font-size: 1.2rem;
  }

  .speaker-title {
    font-size: 0.9rem;
  }

  .speaker-affiliation {
    font-size: 0.85rem;
  }

  .bio-btn {
    font-size: 0.85rem;
    padding: 0.6rem 1.2rem;
  }
}

/* ===========================
   Enhanced Committees Mobile
   =========================== */

@media (max-width: 768px) {
  .committee-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .organizing-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .committee-member {
    padding: 1.5rem;
  }

  .organizing-member {
    border-radius: 12px;
  }

  .member-photo {
    height: 180px;
  }
}

/* ===========================
   Enhanced About Mobile
   =========================== */

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-highlights {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .highlight {
    padding: 1rem;
  }

  .about h2 {
    font-size: 1.8rem;
  }

  .about p {
    font-size: 0.95rem;
  }
}