body {
  margin: 0;
  background: radial-gradient(circle at center, #000a1b 1%, #000000 70%);
  color: #fff;
  font-family: "Segoe UI", Arial, sans-serif;
  overflow-x: hidden;
}

canvas {
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
}

/* Top controls container */
.top-controls {
  position: fixed;
  top: 20px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  z-index: 10;
}

/* Audio Controls Container */
.audio-controls {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* Control Buttons */
.control-btn {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 12px;
  background: rgba(10, 20, 60, 0.7);
  color: #9abfff;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(15px);
  border: 2px solid rgba(150, 150, 255, 0.2);
  font-weight: 600;
  padding: 8px;
  position: relative;
  overflow: hidden;
}

.control-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(110, 255, 178, 0.2), transparent);
  transition: left 0.6s;
}

.control-btn:hover {
  background: rgba(60, 120, 200, 0.4);
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 139, 255, 0.3), 0 0 20px rgba(110, 255, 178, 0.2);
  border-color: rgba(110, 255, 178, 0.5);
}

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

.control-btn:active {
  transform: translateY(0) scale(0.98);
}

.control-btn.muted {
  color: #ff6b6b;
  border-color: rgba(255, 107, 107, 0.3);
}

.control-btn.muted:hover {
  box-shadow: 0 8px 25px rgba(255, 107, 107, 0.3);
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  padding: 80px 20px 20px 20px;
  box-sizing: border-box;
}

.back-btn {
  padding: 10px 20px;
  background: rgba(10, 20, 60, 0.7);
  border: 2px solid rgba(150,150,255,0.2);
  border-radius: 12px;
  color: #9abfff;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.back-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(110, 255, 178, 0.2), transparent);
  transition: left 0.6s;
}

.back-btn:hover {
  background: rgba(60, 120, 200, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 139, 255, 0.3);
  border-color: rgba(110, 255, 178, 0.5);
}

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

/* BEYAZ NEON YAZI + MAVİ GLOW ARKA PLAN */
.title {
  font-size: 2.8em;
  margin: 20px 0;
  text-align: center;
  font-weight: bold;
  letter-spacing: 2px;
  color: #fff;
  position: relative;
  z-index: 1;
  text-shadow:
    0 0 12px #00bfff,
    0 0 28px #00bfff,
    0 0 48px #00bfff,
    0 0 2px #fff,
    0 0 8px #fff,
    0 0 12px #fff;
}
.title::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 140%;
  height: 120%;
  transform: translate(-50%, -50%);
  z-index: -1;
  border-radius: 50px;
  background: radial-gradient(circle, rgba(0,191,255,0.20) 0%, rgba(0,32,128,0.07) 100%);
  filter: blur(18px);
  opacity: 1;
  pointer-events: none;
}

.login-section {
  background: rgba(0, 0, 30, 0.6);
  border: 1px solid rgba(150, 150, 255, 0.4);
  border-radius: 12px;
  padding: 30px;
  margin: 20px 0;
  backdrop-filter: blur(6px);
  text-align: center;
  max-width: 400px;
  width: 100%;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 15px;
  align-items: center;
}

.login-form input {
  padding: 12px 15px;
  border: 1px solid rgba(150, 150, 255, 0.3);
  border-radius: 8px;
  background: rgba(10, 20, 60, 0.3);
  color: #9abfff;
  font-size: 16px;
  width: 250px;
  max-width: 100%;
  transition: all 0.3s ease;
}

.login-form input:focus {
  outline: none;
  border-color: #6effb2;
  box-shadow: 0 0 10px rgba(110, 255, 178, 0.3);
}

.login-form button, .logout-btn {
  padding: 12px 25px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, #0ff, #09f);
  color: #000;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 16px;
  position: relative;
  overflow: hidden;
}

.login-form button::before, .logout-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 0.6s;
}

.login-form button:hover, .logout-btn:hover {
  transform: translateY(-2px) scale(1.05);
  background: linear-gradient(135deg, #09f, #0ff);
  box-shadow: 0 8px 25px rgba(0, 255, 255, 0.4);
}

.login-form button:hover::before, .logout-btn:hover::before {
  left: 100%;
}

.admin-panel {
  background: rgba(0, 0, 30, 0.6);
  border: 1px solid rgba(150, 150, 255, 0.4);
  border-radius: 12px;
  padding: 30px;
  margin: 20px 0;
  backdrop-filter: blur(6px);
  max-width: 800px;
  width: 100%;
}

.upload-section, .delete-section {
  margin: 20px 0;
  padding: 20px;
  border: 1px solid rgba(150, 150, 255, 0.2);
  border-radius: 8px;
  background: rgba(10, 20, 60, 0.2);
}

.upload-section h3, .delete-section h3 {
  color: #6effb2;
  margin-bottom: 15px;
}

#photoInput {
  color: #9abfff;
  margin: 10px 0;
  width: 100%;
}

.upload-section button, .delete-section button {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(135deg, #0ff, #09f);
  color: #000;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  margin: 10px 5px 0 0;
  position: relative;
  overflow: hidden;
}

.upload-section button::before, .delete-section button::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 0.6s;
}

.upload-section button:hover, .delete-section button:hover {
  transform: translateY(-2px) scale(1.05);
  background: linear-gradient(135deg, #09f, #0ff);
  box-shadow: 0 8px 25px rgba(0, 255, 255, 0.4);
}

.upload-section button:hover::before, .delete-section button:hover::before {
  left: 100%;
}

/* Photo management and gallery styles */
.photo-manager {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 15px;
  margin: 15px 0;
}

.photo-item {
  position: relative;
  text-align: center;
}

.photo-item img {
  max-width: 100px;
  max-height: 100px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
  transition: all 0.3s ease;
}

.photo-item img:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
}

.photo-item input[type="checkbox"] {
  margin-top: 5px;
}

.photo-item label {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  color: #ccc;
  word-break: break-all;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  max-width: 1200px;
  padding: 20px;
  width: 100%;
}

.photo-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: rgba(0, 0, 30, 0.3);
  border-radius: 12px;
  padding: 15px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(150, 150, 255, 0.1);
}

.photo-container:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 255, 255, 0.2);
  border-color: rgba(0, 255, 255, 0.3);
}

.photo-container img {
  max-width: 180px;
  max-height: 180px;
  border-radius: 12px;
  box-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.photo-container img:hover {
  transform: scale(1.05);
  box-shadow: 0 0 25px rgba(0, 255, 255, 0.8);
}

.photo-container p {
  margin: 8px 0 0 0;
  font-size: 0.9em;
  color: #ccc;
  text-align: center;
  word-break: break-word;
}

.lightbox {
  display: none;
  position: fixed;
  z-index: 1000;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.9);
  justify-content: center;
  align-items: center;
  flex-direction: column;
  backdrop-filter: blur(5px);
}

.lightbox.show {
  display: flex;
}

.lightbox img {
  max-width: 90%;
  max-height: 90%;
  border-radius: 12px;
  box-shadow: 0 0 30px rgba(0, 255, 255, 0.8);
  animation: lightboxAppear 0.3s ease-out;
}

@keyframes lightboxAppear {
  from { 
    opacity: 0; 
    transform: scale(0.8);
  }
  to { 
    opacity: 1; 
    transform: scale(1);
  }
}

.lightbox .close {
  position: absolute;
  top: 20px;
  right: 40px;
  font-size: 2em;
  color: #fff;
  cursor: pointer;
  font-weight: bold;
  z-index: 1001;
  transition: all 0.3s ease;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
}

.lightbox .close:hover {
  color: #0ff;
  background: rgba(0, 255, 255, 0.2);
  transform: rotate(90deg);
}

.lightbox p {
  margin-top: 15px;
  color: #0ff;
  font-size: 1.1em;
  text-align: center;
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0; 
  left: 0; 
  width: 100vw; 
  height: 100vh;
  background: rgba(0,0,30,0.45);
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.show {
  opacity: 1;
  visibility: visible;
  backdrop-filter: blur(8px);
}

.modal-bg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal {
  background: rgba(0,0,30,0.95);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 30px rgba(180,200,255,0.2);
  padding: 25px 20px;
  min-width: 290px;
  max-width: 97vw;
  color: #9abfff;
  border: 2px solid rgba(150,150,255,0.3);
  position: relative;
  z-index: 100;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.5) rotateX(20deg);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  backdrop-filter: blur(20px);
}

.modal-overlay.show .modal {
  transform: scale(1) rotateX(0deg);
}

.modal-close {
  position: absolute;
  top: 15px;
  right: 20px;
  font-size: 28px;
  cursor: pointer;
  color: #9abfff;
  background: none;
  border: none;
  font-weight: bold;
  transition: all 0.3s ease;
  width: 35px;
  height: 35px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  color: #6effb2;
  background: rgba(110, 255, 178, 0.1);
  transform: rotate(90deg);
}

/* Sound Settings Modal */
.sound-settings {
  max-width: 400px;
  margin: 0 auto;
}

.setting-group {
  margin: 20px 0;
  text-align: center;
}

.setting-group label {
  display: block;
  margin-bottom: 10px;
  color: #6effb2;
  font-weight: 600;
}

.volume-slider {
  width: 100%;
  height: 6px;
  border-radius: 5px;
  background: rgba(150, 150, 255, 0.2);
  outline: none;
  margin: 10px 0;
  -webkit-appearance: none;
  appearance: none;
}

.volume-slider::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0ff, #09f);
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(0, 255, 255, 0.3);
  transition: all 0.3s ease;
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 4px 15px rgba(0, 255, 255, 0.5);
}

.volume-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0ff, #09f);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 10px rgba(0, 255, 255, 0.3);
}

.test-btn {
  padding: 12px 20px;
  background: linear-gradient(135deg, #6effb2, #4db89e);
  color: #000;
  border: none;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.test-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 0.6s;
}

.test-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(110, 255, 178, 0.3);
}

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

@media (max-width: 768px) {
  .top-controls {
    padding: 0 15px;
    top: 15px;
  }

  .audio-controls {
    gap: 8px;
  }

  .control-btn {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }

  .container {
    padding: 70px 15px 15px 15px;
  }

  .title {
    font-size: 2em;
  }

  .login-section, .admin-panel {
    padding: 20px 15px;
    margin: 10px 0;
  }

  .login-form input {
    width: 100%;
  }

  .gallery {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    padding: 15px;
  }

  .photo-container img {
    max-width: 130px;
    max-height: 130px;
  }

  .lightbox .close {
    right: 20px;
    font-size: 1.5em;
  }

  .modal {
    padding: 20px 15px;
    font-size: 13px;
    min-width: 85vw;
    max-width: 95vw;
  }
}