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

:root {
  --primary: #4a90e2;
  --primary-dark: #357abd;
  --secondary: #5dade2;
  --secondary-dark: #3498db;
  --accent: #ffd700;
  --success: #2ecc71;
  --warning: #f39c12;
  --danger: #e74c3c;
  --critical: #FF6B35;
  --bg-light: #ebf5fb;
}
#becareful{
  display: block;
}
body {
  background: linear-gradient(180deg, rgba(135, 206, 235, 0.3) 0%, rgba(176, 224, 230, 0.3) 50%, rgba(224, 246, 255, 0.3) 100%);
  font-family: "Noto Serif JP", serif;
  min-height: 100vh;
  padding-top: 120px;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('images/tokyo-trip-bg.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  opacity: 0.25;
  pointer-events: none;
  z-index: 0;
}

.hamburger {
  font-size: 2rem;
  cursor: pointer;
  display: none;
  user-select: none;
}

@media (max-width: 768px) {
  .hamburger {
    display: block;
    color: var(--primary);
  }

  .nav-menu {
    position: absolute;
    top: 70px;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    flex-direction: column;
    width: 200px;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    box-shadow: -5px 5px 20px rgba(0, 0, 0, 0.2);
    border-radius: 0 0 0 12px;
    transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
  }

  .nav-menu.open {
    max-height: 500px;
    opacity: 1;
    padding: 1em;
  }

  .nav-menu a {
    padding: 1em;
    font-size: 1.1rem;
    min-height: 48px;
    display: flex;
    align-items: center;
  }
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  padding: 1em 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  gap: 0.5em;
  list-style: none;
  flex-wrap: wrap;
}

.nav-menu a {
  text-decoration: none;
  color: #333;
  padding: 0.5em 1em;
  border-radius: 8px;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.nav-menu a:hover {
  background: var(--primary);
  color: white;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  position: relative;
  z-index: 1;
}

.description {
  background: rgba(255, 255, 255, 0.9);
  padding: 1.5em;
  border-radius: 12px;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero {
  background: linear-gradient(135deg, #ffffff 0%, #e3f2fd 100%);
  padding: 4em 2em;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(74, 144, 226, 0.3);
  text-align: center;
  margin-bottom: 10em;
  border: 3px solid var(--primary);
}

.hero h1 {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 0.5em;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.hero p {
  color: #2c3e50;
  font-size: 1.3rem;
  margin-bottom: 1em;
}

.hero-date {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 0.5em 1.5em;
  border-radius: 50px;
  font-weight: 600;
}

.section {
  margin-bottom: 5em;
}

.section-title {
  font-size: 2rem;
  color: #1a5490;
  margin-bottom: 1.5em;
  text-align: center;
  font-weight: 700;
  letter-spacing: 0.1em;
  display: inline-block;
  background: linear-gradient(135deg, #ffffff 0%, #e3f2fd 100%);
  padding: 0.8em 1.5em;
  border-radius: 16px;
  border: 3px solid var(--primary);
  box-shadow: 0 10px 30px rgba(74, 144, 226, 0.3);
  position: relative;
  left: 50%;
  transform: translateX(-50%);
}

.card {
  background: white;
  padding: 2em;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  margin-bottom: 1.5em;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.card-header {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1em;
  color: #333;
  display: flex;
  align-items: center;
  gap: 0.5em;
}

.card-icon {
  font-size: 1.8rem;
}

.accordion {
  background: white;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  margin-bottom: 1.5em;
  overflow: hidden;
}

.accordion-button {
  width: 100%;
  padding: 1.5em 2em;
  font-size: 1.2rem;
  font-weight: 500;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 60px;
}

.accordion-button:hover {
  background: linear-gradient(
    135deg,
    var(--primary-dark) 0%,
    var(--secondary-dark) 100%
  );
}

.accordion-arrow {
  transition: transform 0.3s ease;
  font-size: 1.5rem;
}

.accordion-arrow.open {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
  background: var(--bg-light);
}

.accordion-content.open {
  max-height: 2000px;
  padding: 2em;
}

.schedule-day {
  background: linear-gradient(135deg, #4a90e2 0%, #5dade2 100%);
  color: white;
  padding: 2em;
  border-radius: 16px;
  margin-bottom: 1.5em;
  box-shadow: 0 8px 20px rgba(74, 144, 226, 0.4);
}

.schedule-day h3 {
  font-size: 1.8rem;
  margin-bottom: 1em;
  border-bottom: 3px solid white;
  padding-bottom: 0.5em;
}

.schedule-item {
  background: rgba(255, 255, 255, 0.95);
  color: #333;
  padding: 1.2em;
  border-radius: 12px;
  margin-bottom: 1em;
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 1em;
}

.schedule-time {
  font-weight: 700;
  color: var(--primary);
  font-size: 1.1rem;
}

.schedule-detail {
  line-height: 1.6;
}

.schedule-location {
  color: #666;
  font-size: 0.9rem;
  margin-top: 0.3em;
}

.checklist {
  list-style: none;
  padding: 0;
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: 1em;
  padding: 1.2em;
  border-bottom: 1px solid #e0e0e0;
  transition: background 0.3s ease;
  min-height: 56px;
}

.checklist-item:hover {
  background: var(--bg-light);
}

.checklist-item:last-child {
  border-bottom: none;
}

.checklist-item input[type="checkbox"] {
  width: 24px;
  height: 24px;
  cursor: pointer;
  flex-shrink: 0;
}

.checklist-item label {
  flex: 1;
  cursor: pointer;
  line-height: 1.6;
  word-break: break-word;
}

.checklist-item:nth-child(1) label,
.checklist-item:nth-child(2) label,
.checklist-item:nth-child(3) label,
.checklist-item:nth-child(4) label,
.checklist-item:nth-child(5) label,
.checklist-item:nth-child(6) label,
.checklist-item:nth-child(7) label,
.checklist-item:nth-child(8) label {
  color: var(--critical);
  font-weight: 700;
}

.checklist-category {
  display: inline-block;
  color: white;
  padding: 0.4em 1em;
  border-radius: 20px;
  font-size: 0.85rem;
  white-space: nowrap;
  flex-shrink: 0;
  font-weight: 600;
}

.checklist-item:nth-child(1) .checklist-category,
.checklist-item:nth-child(2) .checklist-category,
.checklist-item:nth-child(3) .checklist-category,
.checklist-item:nth-child(4) .checklist-category,
.checklist-item:nth-child(5) .checklist-category,
.checklist-item:nth-child(6) .checklist-category,
.checklist-item:nth-child(7) .checklist-category,
.checklist-item:nth-child(8) .checklist-category {
  background: var(--critical);
}

.checklist-item .checklist-category {
  background: var(--primary);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1em;
}

.data-table th,
.data-table td {
  padding: 1em;
  text-align: left;
  border-bottom: 1px solid #e0e0e0;
}

.data-table th {
  background: var(--primary);
  color: white;
  font-weight: 600;
}

.data-table tr:hover {
  background: var(--bg-light);
}

.link-card {
  display: block;
  background: white;
  padding: 1.5em;
  border-radius: 12px;
  margin-bottom: 1em;
  text-decoration: none;
  color: #333;
  transition: all 0.3s ease;
  border-left: 4px solid var(--primary);
  min-height: 80px;
}

.link-card:hover {
  transform: translateX(5px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.link-card h4 {
  color: var(--primary);
  margin-bottom: 0.5em;
  line-height: 1.4;
}

.link-card p {
  font-size: 0.9rem;
  color: #666;
  line-height: 1.5;
}

.input-group {
  margin-bottom: 1em;
}

.input-group label {
  display: block;
  margin-bottom: 0.5em;
  color: #555;
  font-weight: 500;
  line-height: 1.6;
}

.input-group input,
.input-group textarea {
  width: 100%;
  padding: 1em;
  font-size: 1rem;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  transition: border-color 0.3s ease;
  font-family: "Noto Serif JP", serif;
}

.input-group input:focus,
.input-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.submit-btn {
  width: 100%;
  padding: 1.2em;
  font-size: 1.1rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: "Noto Serif JP", serif;
  min-height: 56px;
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(74, 144, 226, 0.5);
}

.success-message {
  background: var(--success);
  color: white;
  padding: 1em;
  border-radius: 8px;
  margin-top: 1em;
  display: none;
  animation: slideDown 0.3s ease;
}

.footer {
  background: linear-gradient(135deg, #2e86c1 0%, #3498db 100%);
  color: white;
  text-align: center;
  padding: 3em 2em;
  margin-top: 4em;
  border-radius: 20px 20px 0 0;
  box-shadow: 0 -5px 20px rgba(74, 144, 226, 0.3);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2em;
  margin-top: 1em;
  flex-wrap: wrap;
}

.footer-links a {
  color: white;
  text-decoration: none;
  transition: opacity 0.3s ease;
  padding: 0.5em;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.footer-links a:hover {
  opacity: 0.7;
}

@media (max-width: 768px) {
  body {
    padding-top: 90px;
  }
  
  body::before {
    background-attachment: scroll;
  }

  .hero h1 {
    font-size: 1.8rem;
    line-height: 1.3;
  }

  .hero p {
    font-size: 1.1rem;
    line-height: 1.5;
  }

  .hero {
    padding: 2.5em 1.5em;
    margin-bottom: 5em;
  }

  .hero-date {
    font-size: 0.95rem;
    padding: 0.6em 1.2em;
  }

  .section-title {
    font-size: 1.5rem;
    line-height: 1.4;
    padding: 0.6em 1.2em;
  }

  .card {
    padding: 1.5em;
  }

  .card-header {
    font-size: 1.2rem;
    line-height: 1.4;
  }

  .accordion-button {
    padding: 1.2em 1.5em;
    font-size: 1.05rem;
    line-height: 1.4;
  }

  .accordion-content.open {
    padding: 1.5em;
  }

  .schedule-item {
    grid-template-columns: 1fr;
    gap: 0.5em;
  }

  .schedule-time {
    font-size: 1rem;
  }

  .schedule-detail {
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .checklist-item {
    padding: 1em;
    gap: 0.8em;
    flex-wrap: nowrap;
  }

  .checklist-item label {
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .checklist-category {
    font-size: 0.75rem;
    padding: 0.3em 0.7em;
  }

  .data-table {
    font-size: 0.9rem;
  }

  .data-table th,
  .data-table td {
    padding: 0.8em 0.5em;
  }

  .link-card {
    padding: 1.2em;
  }

  .link-card h4 {
    font-size: 1rem;
    line-height: 1.5;
  }

  .link-card p {
    font-size: 0.85rem;
    line-height: 1.6;
  }

  .input-group input,
  .input-group textarea {
    font-size: 16px;
    padding: 0.9em;
  }

  .submit-btn {
    font-size: 1rem;
    padding: 1.1em;
  }

  .footer {
    padding: 2em 1.5em;
  }

  .footer-links {
    gap: 1em;
    font-size: 0.9rem;
  }
}

@media (max-width: 375px) {
  .hero h1 {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.3rem;
  }

  .accordion-button {
    font-size: 1rem;
    padding: 1em;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}