:root {
  --primary: #457b9d;
  --accent: #00a7b3;
  /* --bg-light: #f1faee; */
  --text-dark: #1d3557;
  --text-gray: #555;
  --font: 'Noto Sans JP', sans-serif;
  --radius: 1rem;
  --shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: var(--font);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: linear-gradient(to right, #74ebd5, #ACB6E5);
  color: var(--text-dark);
}

.navbar {
  background-color: var(--primary) !important;
  padding: 1rem 2rem;
}

.navbar .logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: #fff;
}

.breed-select,
.search-box {
  margin-left: 1rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  border: 1px solid #ccc;
}

.sub-nav {
  background-color:#dbecfa;
  border-bottom: 1px solid #ddd;
}

.sub-nav .nav-link {
  color: var(--text-dark);
  padding: 0.5rem 1rem;
  transition: background 0.3s;
  font-weight: 500;
}

.sub-nav .nav-link.active,
.sub-nav .nav-link:hover {
  color: #fff;
  background-color: #01659b;
  border-radius: var(--radius);
}


main.flex-fill {
  padding-top: 2rem;
  padding-bottom: 1rem;
}

.slider-wrapper {
  width: 92%;
  max-width: 800px;
  height: 500px;
  overflow: hidden;
  display: flex;
  align-items: center;
  margin-top: 1rem; 
  position: relative;
}

.slider-container {
  display: flex;
  gap: 1.25rem;
  transition: transform 0.5s ease;
  will-change: transform;
}

.slide {
  flex: 0 0 250px;
}

.slide-btn {
  background: rgba(255, 255, 255, 0.8);
  border: none;
  font-size: 1.5rem;
  padding: 0.5rem 1rem;
  border-radius: 50%;
  box-shadow: var(--shadow);
  cursor: pointer;
  z-index: 1;
  transition: background 0.3s;
}

.slide-btn:hover {
  background: #fff;
}

.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 300px;
  position: relative;
}

.card:hover {
  transform: translateY(-5px);
}

.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card h4 {
  font-size: 1.2rem;
  margin: 0.75rem 0 0.5rem;
  color: var(--primary);
  text-align: center;
}

.card p {
  flex: 1;
  font-size: 0.9rem;
  padding: 0 0.75rem;
  color: var(--text-gray);
  text-align: center;
}

.card-button,
.btn-outline {
  display: inline-block;
  margin: 1rem auto 1.25rem;
  padding: 0.5rem 1.5rem;
  font-weight: bold;
  font-size: 1rem;
  color: var(--accent);
  border: 2px solid var(--accent);
  border-radius: 2rem;
  background: none;
  cursor: pointer;
  transition: background 0.3s, color 0.3s;
}

.left-btn,
.right-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
}

.left-btn {
  left: 0.5rem;
}

.right-btn {
  right: 0.5rem;
}


.card-button:hover,
.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

.button-area {
  gap: 1rem;
  display: flex;
  justify-content: center;
  padding: 2rem 0;
}


.flip-card {
  perspective: 1000px;
  height: 300px;
  position: relative;
  background:#dbecfa;
}

.flip-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;

}

.flip-card:hover .flip-inner {
  transform: rotateY(180deg);
}

.flip-front,
.flip-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--radius);
  overflow: hidden;
}

.flip-front img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.flip-back {
  background: linear-gradient(135deg, var(--primary), #dbecfa);
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 1rem;
  color: rgb(240, 248, 184);
}

.flip-back h4 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  font-weight: bold;
  color: #ddd;
}

.flip-back p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #f1f1f1;
}


.upload-download-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem;
  background-color: #dbecfa;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 500px;
  margin: 2rem auto;
}

.upload-download-container input[type="file"] {
  display: none;
}

.upload-download-container button {
  padding: 0.75rem 2rem;
  font-size: 1rem;
  background-color: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background-color 0.3s, transform 0.3s;
  display: inline-block;
}

.upload-download-container button:hover {
  background-color: var(--accent);
  transform: translateY(-2px);
}

#fileInputLabel {
  font-size: 1rem;
  color: var(--primary);
  cursor: pointer;
  text-decoration: underline;
  transition: color 0.3s;
}

#fileInputLabel:hover {
  color: var(--accent);
}

#uploadResult {
  font-size: 1rem;
  color: var(--text-gray);
  margin-top: 1rem;
}

#downloadBtn {
  padding: 0.75rem 2rem;
  font-size: 1rem;
  background-color: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background-color 0.3s, transform 0.3s;
  display: inline-block;
}

#downloadBtn:hover {
  background-color: var(--primary);
  transform: translateY(-2px);
}

.modal {
  position: fixed;
  z-index: 999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.4);
  display: flex;
  justify-content: center;
  align-items: center;
  }
  
  .modal-content {
  background-color: #fff;
  padding: 2rem;
  width: 90%;
  max-width: 400px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  position: relative;
  animation: fadeIn 0.3s ease-in-out;
  }
  
  @keyframes fadeIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
  }
  
  .modal-content h2 {
  margin-top: 0;
  font-size: 1.5rem;
  text-align: center;
  color: #333;
  }
  
  .modal-content label {
  display: block;
  margin: 1rem 0 0.3rem;
  font-weight: 600;
  color: #444;
  }
  
  .modal-content input {
  width: 100%;
  padding: 0.6rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  box-sizing: border-box;
  font-size: 1rem;
  }
  
  .modal-actions {
  margin-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  }
  
  .modal-actions button {
  flex: 1;
  margin: 0 0.3rem;
  padding: 0.6rem;
  border: none;
  border-radius: 6px;
  background-color: #5aa9fe;
  color: white;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.2s ease;
  }
  
  .modal-actions button:hover {
  background-color: #0056b3;
  }
  
  .modal-actions button#cancelLogin,
  .modal-actions button#cancelRegister {
  background-color: #ccc;
  color: #333;
  }
  
  .modal-actions button#cancelLogin:hover,
  .modal-actions button#cancelRegister:hover {
  background-color: #999;
  }
  
  .close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 24px;
  font-weight: bold;
  color: #666;
  cursor: pointer;
  }
  
  .close:hover {
  color: #000;
  }

@media (max-width: 768px) {
  .slider-wrapper {
    flex-direction: column;
    height: auto;
  }

  .slide {
    flex: 0 0 80%;
    height: 100%;
  }

  .card {
    height: auto;
  }

  .button-area {
    flex-direction: column;
    align-items: center;
  }

  .upload-download-container {
    width: 90%;
    padding: 1.5rem;
  }
}