/* Global Variables */
:root {
  /* Light Mode Colors */
  --bg-color-light: #FFFFFF;
  --text-main-light: #333333;
  --text-sub-light: #666666;
  --link-color-light: #007BFF;
  --error-color-light: #DC3545;
  --success-color-light: #28A745;
  --accent-color: #FFA500;

  /* Dark Mode Colors */
  /* --bg-color-dark: #121212;
  --text-main-dark: #EEEEEE;
  --text-sub-dark: #BBBBBB;
  --link-color-dark: #8AB4F8;
  --error-color-dark: #F28B82;
  --success-color-dark: #A7FFEB; */
  --bg-color-dark: #FFFFFF;
  --text-main-dark: #333333;
  --text-sub-dark: #666666;
  --link-color-dark: #007BFF;
  --error-color-dark: #DC3545;
  --success-color-dark: #28A745;
}

/* Base Styles */
body {
  font-family: 'Noto Sans JP', Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main-light);
  background-color: var(--bg-color-light);
}

/* Typography */
h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.4;
}

h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
}

h3 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.5;
}

h4 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
}

h5 {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
}

h6 {
  font-size: 14px;
  font-weight: 700;
  line-height: 1.6;
}

/* Buttons */
.btn-primary {
  background-color: var(--accent-color);
  color: #FFFFFF;
  padding: 16px 32px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.btn-primary:hover {
  background-color: #FFC34D;
}

.btn-primary:active {
  background-color: #E69500;
}

.btn-primary:disabled {
  background-color: #CCCCCC;
  color: #999999;
  cursor: not-allowed;
}

.btn-secondary {
  background-color: #FFFFFF;
  color: var(--link-color-light);
  padding: 16px 32px;
  border: 2px solid var(--link-color-light);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  background-color: #E9ECEF;
}

.btn-secondary:active {
  background-color: #CED4DA;
  color: #0056b3;
}

.btn-secondary:disabled {
  background-color: #FFFFFF;
  color: #999999;
  border-color: #CCCCCC;
  cursor: not-allowed;
}

/* Input Fields */
.input-field {
  background-color: #F8F9FA;
  color: var(--text-main-light);
  border: 1px solid #CED4DA;
  border-radius: 4px;
  padding: 12px;
  width: 100%;
  transition: all 0.3s ease;
}

.input-field::placeholder {
  color: var(--text-sub-light);
}

.input-field:hover {
  background-color: #EEEEEE;
  border-color: var(--link-color-light);
}

.input-field:focus {
  background-color: #FFFFFF;
  border-color: var(--link-color-light);
  outline: none;
}

.input-field:disabled {
  background-color: #EEEEEE;
  color: #999999;
  border-color: #CED4DA;
  cursor: not-allowed;
}

/* Modal */
.modal-backdrop {
  background-color: rgba(0, 0, 0, 0.5);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-container {
  background-color: #FFFFFF;
  border-radius: 8px;
  padding: 32px;
  box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);
}

/* Card */
.card {
  background-color: #FFFFFF;
  border: 1px solid #EEEEEE;
  border-radius: 8px;
  padding: 24px;
  box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.05);
}

/* Loading Animation */
.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid #FFA500;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 1s linear infinite;
}

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

/* Spacing */
.section-spacing {
  margin-bottom: 80px;
}

.element-spacing {
  margin-bottom: 24px;
}

.icon-spacing {
  margin-right: 8px;
}

/* Responsive Design */
@media (max-width: 767px) {
  body {
    font-size: 14px;
  }

  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 24px;
  }

  h3 {
    font-size: 20px;
  }

  h4 {
    font-size: 16px;
  }

  h5 {
    font-size: 14px;
  }

  h6 {
    font-size: 12px;
  }

  .btn-primary,
  .btn-secondary {
    padding: 12px 24px;
  }

  .section-spacing {
    margin-bottom: 40px;
  }

  .element-spacing {
    margin-bottom: 16px;
  }
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  body {
    background-color: var(--bg-color-dark);
    color: var(--text-main-dark);
  }

  .input-field {
    background-color: #1E1E1E;
    border-color: #333333;
    color: var(--text-main-dark);
  }

  .input-field::placeholder {
    color: var(--text-sub-dark);
  }

  .card {
    background-color: #1E1E1E;
    border-color: #333333;
  }

  .modal-container {
    background-color: #1E1E1E;
  }
}

/* Utility Classes */
.text-error {
  color: var(--error-color-light);
}

.text-success {
  color: var(--success-color-light);
}

.text-center {
  text-align: center;
}

.w-full {
  width: 100%;
}

.hidden {
  display: none;
}

/* アコーディオンのスタイル */
.accordion {
  border: 1px solid #EEEEEE;
  border-radius: 8px;
  margin-bottom: 16px;
  overflow: hidden;
}

.accordion__trigger {
  width: 100%;
  padding: 16px;
  background: #FFF5E6;
  border: none;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 18px;
  font-weight: bold;
  color: var(--text-main-light);
}

.accordion__trigger:hover {
  background: #FFE8CC;
}

.accordion__trigger-icon {
  transition: transform 0.3s ease;
}

.accordion__trigger[aria-expanded="true"] .accordion__trigger-icon {
  transform: rotate(180deg);
}

.accordion__content {
  display: none;
  background: #FFFFFF;
}

.accordion__content[aria-hidden="false"] {
  display: block;
}

.footer {
  display: flex;
  justify-content: center;
}

.footer img {
  max-width: 15rem;
  display: block;
  margin: 0 auto;
}