index.css

body, html {
  font-family: 'Noto Sans JP', 'Inter', system-ui, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f8fafc;
  height: 100%;
}

.wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  height: 100vh;
  overflow: hidden;
}

.wrapper:not(.chat-active) .footer-notice {
  display: block;
}

.wrapper.chat-active footer .footer-notice {
  display: none;
}

.wrapper.chat-active footer {
  padding: 0.5rem;
}

.wrapper.chat-active footer .footer-main {
  margin: 0;
}

header {
  display: flex;
  flex-direction: column;
  background: #ffffff;
  box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
  margin-bottom: 1rem;
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 20px;
}

.header-content {
  flex: 1;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
  text-align: left;
  padding-left: 20px;
  flex: 1;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
header h1 a {
  text-decoration: none;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}


header .model-description {
  text-align: left;
  margin: 0;
  padding: 4px 60px;
  font-size: 0.9rem;
  color: #64748b;
  max-height: 200px;
  overflow: hidden;
  transition: all 0.3s ease-out;
  opacity: 1;
  line-height: 2.0;
}

.header-collapsed .model-description {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
}

.collapse-section {
  border-top: 1px solid #e2e8f0;
  border-bottom: 1px solid #e2e8f0;
  margin-bottom: 1rem;
}
.header-toggle {
  width: 100%;
  background: #ffffff;
  border: none;
  height: 24px;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  border-top: 1px solid #e2e8f0;
  padding: 0;
  margin-top: -1px;
}
.header-toggle:hover {
  background: #f8fafc;
}


.wrapper.chat-active .header-toggle {
  display: flex;
}
.toggle-icon {
  width: 36px;
  height: 4px;
  position: relative;
}

.toggle-icon::before {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border: 2px solid #e2e8f0;
  border-left: 0;
  border-top: 0;
  left: 50%;
  top: -4px;
  transform: translateX(-50%) rotate(45deg);
  transition: transform 0.3s ease;
}
.header-collapsed .toggle-icon::before {
  transform: translateX(-50%) rotate(-135deg);
  top: 0;
}

.model-description a {
  color: #2563eb;
  text-decoration: none;
}

.model-description a:hover {
  text-decoration: underline;
}

header .logo {
  height: 50px;
  margin-left: auto;
  background-color: white;
  padding: 5px;
  border-radius: 5px;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  min-height: 0;
  height: 100%;
}

main:not(.chat-active) {
  justify-content: center;
}

.download-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 2rem 0;
  margin: 0;
  height: auto;
}

#download {
  margin-bottom: 10px;
}

#download-status {
  padding: 10px;
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 5px;
  font-size: 0.9rem;
  color: #333;
  box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
  text-align: center;
  max-width: 400px;
}

button {
  padding: 15px 30px;
  font-size: 1.2rem;
  border: none;
  border-radius: 5px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: white;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

button:disabled {
  background: #94a3b8;
  cursor: not-allowed;
}

.chat-container {
  flex: 1;
  display: none;
  flex-direction: column;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 1rem;
  box-sizing: border-box;
  overflow: hidden;
  position: relative;
  height: 100%;
}


.chat-box {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  background-color: #ffffff;
  border-radius: 5px;
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.1);
  margin-bottom: 0.5rem;
  position: relative;
  height: 0;
}

.chat-stats {
  background-color: #f1f5f9;
  padding: 10px;
  font-size: 0.9rem;
}

.chat-input-container {
  position: sticky;
  bottom: 0;
  display: flex;
  gap: 8px;
  padding: 1rem;
  align-items: flex-end;
  background-color: #ffffff;
  border-top: 1px solid #e2e8f0;
  padding-top: 0.5rem;
  margin-top: auto;
}

#user-input {
  flex: 1;
  resize: none;
  min-height: 24px;
  max-height: 200px;
  padding: 0.75rem;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  font-family: inherit;
  line-height: 1.5;
  overflow-y: auto;
}

.input-actions {
  display: flex;
  gap: 4px;
}


#reset-chat {
  display: none;
  padding: 0.75rem;
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  color: #64748b;
  font-size: 0.9rem;
}
#reset-chat:hover {
  background: #f8fafc;
}

#reset-chat:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  background: #f1f5f9;
  transform: none;
  box-shadow: none;
}

#reset-chat:disabled:hover {
  background: #f1f5f9;
  transform: none;
  box-shadow: none;
}

#user-input:focus {
  outline: none;
  border-color: #2563eb;
}

#send {
  padding: 10px 12px;
  font-size: 0.9rem;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

#send:hover {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

footer {
  text-align: center;
  padding: 1rem;
  background-color: #ffffff;
  color: #64748b;
  border-top: 1px solid #e2e8f0;
  width: 100%;
}

footer p {
  margin: 0;
}

footer a {
  color: #2563eb;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.footer-main {
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.footer-notice {
  max-width: 800px;
  margin: 0 auto;
  font-size: 0.8rem;
  color: #64748b;
  text-align: left;
}

.notice-text {
  margin: 0.5rem 0;
  line-height: 1.5;
}

.hidden {
  display: none;
}

.message-container {
  display: flex;
  margin: 10px 0;
}

.message-container.user {
  justify-content: flex-end;
}

.message-container.assistant {
  justify-content: flex-start;
}

.message {
  white-space: pre-wrap;
  word-wrap: break-word;
  max-width: 80%;
  padding: 10px;
  border-radius: 10px;
  font-size: 1rem;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.message pre {
  background-color: #f8fafc;
  padding: 1em;
  border-radius: 5px;
  overflow-x: auto;
}

.message-container.user .message {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: white;
}

.message-container.assistant .message {
  background-color: #f1f5f9;
  color: #334155;
}



.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  position: absolute;
}

.button-content {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 50px;
}

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

.progress-bar {
  width: 100%;
  max-width: 400px;
  height: 4px;
  background-color: #e2e8f0;
  border-radius: 2px;
  margin-top: 10px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.suggestions-container {
  display: none;
  flex-direction: column;
  align-items: center;
  margin: 0 auto 1rem;
  gap: 1rem;
  max-width: 800px;
  width: 100%;
}

.suggestions-title {
  color: #334155;
  font-size: 1.2rem;
  font-weight: 500;
  margin: 0;
}

.suggestions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
  padding: 0 20px;
}

.suggestion-btn {
  background: white;
  border: 2px solid #e2e8f0;
  padding: 1rem;
  border-radius: 12px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  transition: all 0.2s;
  font-size: 1rem;
  text-align: left;
  color: #1e293b;
}

.suggestion-btn:hover {
  border-color: #2563eb;
  transform: translateY(-1px);
}

.info-button {
  position: fixed;
  right: max(20px, calc((100% - 1000px) / 2 - 60px));
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: white;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  color: #64748b;
  z-index: 10;
  padding: 0;
}

.info-button:hover {
  color: #2563eb;
  border-color: #2563eb;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}


.info-button {
  display: none;
}

.wrapper.chat-active .info-button {
  display: flex;
  position: fixed;
  right: max(20px, calc((100% - 1000px) / 2 - 60px));
  bottom: 80px;
  top: auto;
  transform: none;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: white;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  color: #64748b;
  z-index: 10;
  padding: 0;
}

.wrapper.chat-active .info-button:hover {
  color: #2563eb;
  border-color: #2563eb;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.wrapper.chat-active .modal:not(.hidden) {
  display: flex;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: white;
  border-radius: 8px;
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}


.modal-header {
  padding: 1rem;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: white;
  position: sticky;
  top: 0;
  z-index: 1;
}

.modal-header h2 {
  margin: 0;
  font-size: 1.25rem;
  color: #1e293b;
  font-weight: 500;
}

.close-modal {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: #64748b;
  cursor: pointer;
  padding: 0.5rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.close-modal:hover {
  background: #f1f5f9;
  color: #1e293b;
}

.modal-body {
  padding: 1.5rem;
}

.modal-body .notice-text {
  color: #1e293b;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.modal-body .notice-text:last-child {
  margin-bottom: 0;
}

@media (max-width: 1200px) {
  .wrapper.chat-active .info-button {
    right: 20px;
  }
}

@media (max-width: 768px) {
  .header-main {
    padding: 8px 12px;
  }

  header h1 {
    font-size: 1.3rem;
    padding-left: 0;
  }
  
  .header-content {
    flex: 1;
  }

  header .model-description {
    font-size: 0.85rem;
    padding: 8px 40px;
    line-height: 1.8;
  }

  .logo {
    height: 35px;
  }

  .suggestions {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 0 12px;
  }

  .suggestions-title {
    font-size: 1.1rem;
    padding: 0 12px;
  }

  .suggestion-btn {
    padding: 12px;
    font-size: 0.9rem;
  }

  .chat-input-container {
    padding: 8px;
  }
  
  #user-input {
    font-size: 16px;
    padding: 8px;
  }
  
  .message {
    max-width: 85%;
    font-size: 0.9rem;
  }
  
  .footer-notice {
    padding: 0 12px;
    font-size: 0.75rem;
  }
  
  #send {
    padding: 8px 16px;
    min-width: 60px;
  }
}

@media (max-width: 640px) {
  .wrapper.chat-active .info-button {
    bottom: 70px;
  }

  .modal-content {
    width: 95%;
    max-height: 80vh;
  }
  
  .modal-header h2 {
    font-size: 1.1rem;
  }

  .modal-body {
    padding: 1rem;
  }

  .close-modal {
    padding: 0.25rem;
    width: 32px;
    height: 32px;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 1.2rem;
  }
  
  header .model-description {
    font-size: 0.8rem;
    padding: 8px 20px;
    line-height: 1.7;
  }

  .logo {
    height: 30px;
  }

  .chat-input-container {
    padding: 8px;
  }

  #user-input {
    font-size: 16px;
    padding: 8px;
  }

  #send {
    padding: 8px 12px;
    font-size: 0.85rem;
  }

  #reset-chat {
    padding: 8px;
  }

  .message {
    max-width: 90%;
    font-size: 0.9rem;
    padding: 8px;
  }

  .suggestions-container {
    gap: 0.5rem;
  }

  .suggestions {
    grid-template-columns: 1fr;
  }
}

@supports (padding: max(0px)) {
  .chat-input-container {
    padding-bottom: max(8px, env(safe-area-inset-bottom));
  }

  .model-description {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }

  footer {
    padding-bottom: max(1rem, env(safe-area-inset-bottom));
  }
}