@import url("https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&display=swap");

:root {
  --primary: #ff6200;
  --bg-dark: #181a20;
  --bg-glass: rgba(30, 32, 40, 0.7);
  --bg-glass-strong: rgba(30, 32, 40, 0.95);
  --text: #fff;
  --text-muted: #b0b3b8;
  --card-radius: 24px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

html,
body {
  font-family: "Montserrat", Arial, sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  scroll-behavior: smooth;
  text-align: center;
}

#logo {
  max-width: 15%;
}

body {
  background: linear-gradient(120deg, #181a20 60%, #23243a 100%);
}

#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100vw;
  background: var(--bg-glass);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 2rem;
  z-index: 1000;
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background var(--transition);
}
#navbar > #logo {
  margin-right: 2rem;
}
#navbar-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  justify-content: center;
}
#navbar-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  padding: 0.5rem 1rem;
  border-radius: 25px;
  transition: background var(--transition), color var(--transition);
}
#navbar-links a:focus,
#navbar-links a:hover {
  background: var(--primary);
  color: #fff;
  outline: 2px solid var(--primary);
}
#signup-btn {
  background: var(--primary);
  color: #fff !important;
  font-weight: 700;
  border: none;
  border-radius: 16px;
  padding: 0.5rem 1.2rem;
  margin-left: 1rem;
  box-shadow: 0 2px 8px rgba(255, 98, 0, 0.15);
  transition: transform var(--transition), box-shadow var(--transition);
}
#signup-btn:hover,
#signup-btn:focus {
  transform: scale(1.08);
  box-shadow: 0 4px 16px rgba(255, 98, 0, 0.25);
}

main {
  margin-top: 80px;
}

.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, #23243a 60%, #181a20 100%);
}
.hero-bg-anim {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.25;
  animation: fadeIn 2s;
}
.hero-content {
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  animation: slideUp 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.hero-img {
  max-width: 850px;
  border-radius: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
  animation: float 3s ease-in-out infinite;
}
.hero-title {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 2px;
  margin: 0;
  text-shadow: 0 2px 16px #000a;
}
.hero-subtitle-container {
  margin-bottom: 1rem;
}
.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text);
  letter-spacing: 1px;
  text-shadow: 0 1px 8px #000a;
}
.cta-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 16px;
  padding: 0.8rem 2.2rem;
  font-size: 1.2rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(255, 98, 0, 0.15);
  transition: transform var(--transition), box-shadow var(--transition);
}
.cta-btn:hover,
.cta-btn:focus {
  transform: scale(1.08);
  box-shadow: 0 4px 16px rgba(255, 98, 0, 0.25);
  outline: 2px solid var(--primary);
}
.cta-btn.small {
  font-size: 1rem;
  padding: 0.5rem 1.2rem;
}

.section {
  padding: 80px 0 40px 0;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}
.about-section h1,
.books-section h1,
.events-section h1,
.singers-section h1,
.instructors-section h1,
.faq-section h1 {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 2rem;
  letter-spacing: 1px;
}
.about-cards {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}
.about-card {
  background: var(--bg-glass);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow);
  padding: 2rem 1.5rem;
  min-width: 260px;
  max-width: 400px;
  flex: 1 1 300px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform var(--transition), box-shadow var(--transition);
  animation: fadeIn 1.2s;
}
.about-card:hover,
.about-card:focus-within {
  transform: translateY(-8px) scale(1.03);
  box-shadow: 0 8px 32px 0 rgba(255, 98, 0, 0.15);
}
.about-badge {
  position: absolute;
  transform: translate(-120%, -50%);
  width: 60px;
}
.about-founder {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-top: 3rem;
  background: var(--bg-glass);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow);
  padding: 2rem 1.5rem;
  animation: fadeIn 1.5s;
}
.founder-img {
  width: 250px;
  border-radius: 25px;
  box-shadow: 0 2px 16px #000a;
}
.founder-info {
  flex: 1;
  text-align: left;
}

.books-section .gallery-group {
  margin-bottom: 2.5rem;
}
.gallery-row {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}
.gallery-photo {
  width: 140px;
  height: 200px;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: 0 2px 12px #000a;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  background: #222;
  border: 2px solid transparent;
}
.gallery-photo:hover,
.gallery-photo:focus {
  transform: scale(1.08) rotate(-2deg);
  box-shadow: 0 8px 32px 0 rgba(255, 98, 0, 0.15);
  border: 2px solid var(--primary);
  outline: none;
}
.popup {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 50vw;
  height: 50vh;
  background: rgba(0, 0, 0, 0.85);
  border-radius: 18px;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.4s;
}
.popup.open {
  display: flex;
}
.popup-content {
  max-width: 80%;
  max-height: 80%;
  border-radius: 18px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  border: 4px solid var(--primary);
  background: #222;
  display: block;
  margin-left: auto;
  margin-right: auto;
  margin-left: 20px;
}

.popup .close {
  position: absolute;
  top: 2rem;
  right: 3rem;
  color: #fff;
  font-size: 2.5rem;
  font-weight: bold;
  cursor: pointer;
  z-index: 10;
  background: none;
  border: none;
  outline: none;
  transition: color var(--transition);
}
.popup .close:hover,
.popup .close:focus {
  color: var(--primary);
}
.event-carousel {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  width: 100%;
}
.carousel-img {
  max-width: 320px;
  max-height: 40vh;
  border-radius: 16px;
  box-shadow: 0 2px 12px #000a;
  display: block;
  margin-left: auto;
  margin-right: auto;
}
.carousel-arrow {
  background: var(--bg-glass);
  color: var(--primary);
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  font-size: 2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: 20px;
  margin-right: 20px;
  transition: background var(--transition), color var(--transition);
}
.carousel-arrow:hover,
.carousel-arrow:focus {
  background: var(--primary);
  color: #fff;
}
.carousel-indicator {
  color: var(--text-muted);
  text-align: center;
  margin-top: 1rem;
  font-size: 1.1rem;
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
}

.events-cards {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}
.event-card {
  background: var(--bg-glass);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow);
  padding: 1.5rem 1rem;
  min-width: 220px;
  max-width: 300px;
  flex: 1 1 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform var(--transition), box-shadow var(--transition);
  animation: fadeIn 1.2s;
}
.event-card img {
  width: 100%;
  max-width: 220px;
  border-radius: 16px;
  margin-bottom: 1rem;
  box-shadow: 0 2px 12px #000a;
}
.event-card:hover,
.event-card:focus-within {
  transform: translateY(-8px) scale(1.03);
  box-shadow: 0 8px 32px 0 rgba(255, 98, 0, 0.15);
}

.singer-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 5rem;
  justify-content: center;
  padding: 0 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.singer-card {
  background: var(--bg-glass);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow);
  padding: 2rem 1.5rem;
  width: 100%;
  animation: fadeIn 1.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.faq-question {
  background-color: transparent;
  border: none;
  outline: none;
  padding: 0;
  margin: 0;
  font-size: 1.2rem;
  font-weight: 600;
}

.singer-card img {
  width: 150px;
  height: 250px;
  object-fit: cover;
  border-radius: 15px;
  border: 4px solid var(--primary);
  box-shadow: 0 4px 16px rgba(255, 98, 0, 0.3);
  margin-bottom: 1rem;
}

.school-img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 15px;
  border: 4px solid var(--primary);
  box-shadow: 0 4px 16px rgba(255, 98, 0, 0.3);
  margin-bottom: 1rem;
}

#text-yupei,
#text-shuoli {
  max-height: 45px;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

#text-yupei-en,
#text-shuoli-en {
  max-height: 42px;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

#readmore {
  text-decoration: none;
  color: var(--primary);
  font-weight: 700;
  font-size: 1.1rem;
  padding: 0.5rem 1rem;
  border-radius: 25px;
  transition: background var(--transition), color var(--transition);
}

.faq-section {
  background: linear-gradient(120deg, #181a20 60%, #23243a 100%);
  border-radius: 32px;
  box-shadow: var(--shadow);
  padding: 3rem 2rem;
  margin-bottom: 2rem;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.faq-item {
  background: var(--bg-glass);
  border-radius: 16px;
  box-shadow: 0 2px 8px #000a;
  padding: 1.2rem 1.5rem;
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
  outline: none;
  border: 2px solid transparent;
  position: relative;
}
.faq-item:focus,
.faq-item.open {
  background: var(--bg-glass-strong);
  border: 2px solid var(--primary);
}
.faq-question {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.faq-icon {
  font-size: 1.5rem;
  margin-left: 1rem;
  transition: transform var(--transition);
}
.faq-item.open .faq-icon {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  color: var(--text-muted);
  font-size: 1rem;
  transition: max-height var(--transition), padding var(--transition);
  padding: 0 0;
}
.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 1rem 0 0.5rem 0;
}

footer {
  background: var(--bg-glass-strong);
  color: var(--text-muted);
  text-align: center;
  padding: 2rem 0 1rem 0;
  font-size: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 2rem;
}
#footer-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
  margin-left: 0.5rem;
  transition: color var(--transition);
}
#footer-link:hover,
#footer-link:focus {
  color: #fff;
  text-decoration: underline;
}

@media (max-width: 900px) {
  .about-cards,
  .events-cards,
  .gallery-row {
    flex-direction: column;
    align-items: center;
  }
  .about-founder {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  #navbar {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 0.5rem;
  }
  #navbar-links {
    flex-wrap: wrap;
    gap: 1rem;
  }
  .event-carousel {
    flex-direction: column;
    gap: 0.5rem;
  }
  .carousel-img {
    max-width: 90vw;
    max-height: 25vh;
  }
  .popup-content {
    max-width: 90vw;
    max-height: 25vh;
  }
}
@media (max-width: 600px) {
  #navbar {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 0.5rem;
  }
  #navbar-links {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .event-carousel {
    flex-direction: column;
    gap: 0.5rem;
  }
  .carousel-img {
    max-width: 95vw;
    max-height: 18vh;
  }
  .popup-content {
    max-width: 95vw;
    max-height: 18vh;
  }
  .hero-title {
    font-size: 2rem;
  }
  .section {
    padding: 40px 0 20px 0;
  }
  .about-founder {
    padding: 1rem 0.5rem;
  }
  .faq-section {
    padding: 1.5rem 0.5rem;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@keyframes slideUp {
  from {
    transform: translateY(60px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}
@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-16px);
  }
}

.popup-desc {
  color: #fff;
  margin-top: 1rem;
  text-align: center;
  font-size: 1rem;
  max-width: 90%;
  word-break: break-word;
  line-height: 1.5;
  margin-left: 20px;
  margin-right: 20px;
}

#music-loader {
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100vw;
  height: 100vh;
  background: linear-gradient(120deg, #181a20 60%, #23243a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s;
}
.loader-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.loader-svg {
  animation: spin 1.5s linear infinite;
  margin-bottom: 1.5rem;
}
.loader-text {
  color: #ffd700;
  font-size: 1.3rem;
  font-family: "Montserrat", Arial, sans-serif;
  letter-spacing: 1px;
  text-shadow: 0 2px 8px #000a;
  font-weight: 700;
  text-align: center;
}
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.youtube-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  justify-content: center;
  margin: 0 auto;
  max-width: 1200px;
}

.youtube-card {
  width: 100%;
  margin: 0 auto;
}