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

html, body {
  height: 100%;
  overflow-x: hidden;
}

body {
  background-color: #000000;
  color: white;
  font-family: Arial, sans-serif;
}


.page-container {
  width: 100%;
  height: 6500px; 
  position: relative;
}


.main-content {
  width: 100%;
  height: 100%;
  position: relative;
}


.hero-section {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1080px;
  background-color: #000000;
  z-index: 5;
  overflow: visible;
}


.back-home {
  position: absolute;
  top: 30px;
  left: 30px;
  color: white;
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 500;
  transition: color 0.3s ease;
  z-index: 20;
}

.back-home:hover {
  color: #64b5f6;
}


.plants-left {
  position: absolute;
  top: 0;
  left: 0;
  width: 900px;
  height: auto;
  z-index: 6;
}

.plants-right {
  position: absolute;
  top: 0;
  right: 0;
  width: 900px;
  height: auto;
  z-index: 6;
}


.plan-b-logo {
  position: absolute;
  top: 5%;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: auto;
  z-index: 10;
}


.presents-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translateX(-50%);
  color: white;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-align: center;
  z-index: 10;
  font-family: Arial, sans-serif;
}


.run-poster {
  position: absolute;
  top: 60%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: auto;
  z-index: 10;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.1);
}


.problem-brief-section {
  position: absolute;
  top: 1800px; 
  left: 0;
  width: 100%;
  height: 1080px;
  background-color: #000000;
  z-index: 5;
  overflow: visible;
}


.plants3-left {
  position: absolute;
  top: 0;
  left: 0;
  width: 900px;
  height: auto;
  z-index: 6;
}

.plants4-right {
  position: absolute;
  top: 0;
  right: 0;
  width: 900px;
  height: auto;
  z-index: 6;
}


.text-columns {
  position: absolute;
  top: 5%;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 1400px;
  display: flex;
  gap: 4rem;
  z-index: 10;
}

.text-column {
  flex: 1;
  color: white;
}

.text-column h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  font-family: Arial, sans-serif;
  text-align: center;
}

.text-column p {
  font-size: 1.125rem;
  line-height: 1.8;
  font-family: Arial, sans-serif;
  font-weight: 400;
  text-align: justify;
}


.lisa-sound-image {
  position: absolute;
  top: 55%;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: auto;
  z-index: 10;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.1);
}


.content-section {
  position: absolute;
  top: 1000px; 
  left: 0;
  width: 100%;
  height: 1080px;
  background-color: #000000;
  z-index: 5;
  padding: 100px 50px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.content-section h2 {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 3rem;
  text-align: center;
}

.content-section p {
  font-size: 1.4rem;
  line-height: 1.8;
  max-width: 1000px;
  text-align: center;
}


.scroll-space {
  position: absolute;
  top: 2160px;
  left: 0;
  width: 100%;
  height: 1080px;
  background-color: #000000;
  z-index: 1;
}


@media (max-width: 768px) {
  .hero-title {
    font-size: 4rem;
  }
  
  .hero-description {
    font-size: 1.2rem;
  }
  
  .content-section h2 {
    font-size: 3rem;
  }
  
  .content-section p {
    font-size: 1.2rem;
  }
}


.audience-solution-section {
  position: absolute;
  top: 2950px; 
  left: 0;
  width: 100%;
  height: 1080px;
  background-color: #000000;
  z-index: 5;
  overflow: visible;
}


.lily-right {
  position: absolute;
  top: 0;
  right: 0;
  width: 900px;
  height: auto;
  z-index: 6;
}


.text-columns-2 {
  position: absolute;
  top: 5%;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 1400px;
  display: flex;
  gap: 120px;
  z-index: 10;
}


.role-section {
  position: absolute;
  top: 75%;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 1200px;
  text-align: center;
  z-index: 10;
  color: white;
}

.role-section h2 {
  font-size: 4.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  font-family: Arial, sans-serif;
}

.role-section p {
  font-size: 1.4rem;
  line-height: 1.8;
  font-family: Arial, sans-serif;
  font-weight: 400;
  text-align: justify;
}


.audio-section {
  position: absolute;
  top: 4100px;
  left: 0;
  width: 100%;
  min-height: 1200px;
  background-color: #000000;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 4rem 2rem;
}


.leaves-left {
  position: absolute;
  top: 0;
  left: 0;
  width: 400px;
  height: auto;
  z-index: 6;
}


.audio-title {
  color: white;
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  z-index: 10;
  font-family: Arial, sans-serif;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.audio-subtitle {
  color: white;
  font-size: 1.125rem;
  text-align: center;
  z-index: 10;
  font-family: Arial, sans-serif;
  margin-bottom: 3rem;
}


.birds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  justify-items: center;
  align-items: center;
}


.bird {
  cursor: pointer;
  transition: transform 0.3s ease;
  z-index: 15;
  width: 100%;
  max-width: 200px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.bird:hover {
  transform: scale(1.15);
}

.bird img {
  width: 100%;
  height: auto;
}


.bts-section {
  position: absolute;
  top: 5400px; 
  left: 0;
  width: 100%;
  height: 1080px;
  background-color: #000000;
  z-index: 5;
  overflow: visible;
}


.plants8-left {
  position: absolute;
  top: 0;
  left: 0;
  width: 400px;
  height: auto;
  z-index: 6;
}

.plants9-right {
  position: absolute;
  top: 0;
  right: 0;
  width: 400px;
  height: auto;
  z-index: 6;
}


.bts-title {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  color: white;
  font-size: 4rem;
  font-weight: 700;
  text-align: center;
  z-index: 10;
  font-family: Arial, sans-serif;
}


.gallery-container {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 1200px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  z-index: 15;
}


.gallery-display {
  position: relative;
  text-align: center;
}


.gallery-photo {
  width: 900px; 
  height: 600px; 
  object-fit: cover;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  transition: transform 0.3s ease;
}

.gallery-photo:hover {
  transform: scale(1.02);
}


.gallery-nav {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  font-size: 4rem; 
  font-weight: bold;
  width: 80px; 
  height: 80px; 
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

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

.gallery-nav:active {
  transform: scale(0.95);
}


.image-counter {
  position: absolute;
  bottom: -50px; 
  left: 50%;
  transform: translateX(-50%);
  color: white;
  font-size: 1.8rem; 
  font-weight: 500;
  font-family: Arial, sans-serif;
}


.youtube-link {
  position: absolute;
  top: 95%; 
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
}

.youtube-link a {
  color: white;
  font-size: 2.5rem; 
  font-family: Arial, sans-serif;
  text-align: center;
  font-weight: 500;
  text-decoration: underline;
  transition: color 0.3s ease;
}

.youtube-link a:hover {
  color: #ff6b6b;
  text-decoration: underline;
}


.youtube-link .bts-video {
  width: 900px;
  max-width: 90vw;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}