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

html, body {
  overflow-x: hidden;
  width: 100%;
}

:root {
  --primary-color: #8b0000;
  --secondary-color: #d4a574;
  --bg-color: #faf8f5;
  --text-color: #333;
  --text-light: #666;
  --border-color: #e0d5c7;
  --today-bg: #fff3e0;
  --today-border: #ff9800;
  --hover-bg: #f5f0eb;
  --holiday-color: #c41e3a;
  --jieqi-color: #2e7d32;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  overflow: hidden;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 30px;
}

/* View Toggle */
.view-toggle {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
}

.toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  padding: 6px 20px;
  font-size: 0.95rem;
  cursor: pointer;
  border-radius: 20px;
  color: var(--text-light);
  transition: all 0.2s ease;
}

.toggle-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.toggle-btn.active {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

.year-title {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.huangdi-year {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-light);
}

/* Quick Navigation */
.quick-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-bottom: 15px;
}

.select-group {
  display: flex;
  gap: 8px;
}

.nav-select {
  padding: 6px 12px;
  font-size: 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: white;
  color: var(--text-color);
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

#yearSelect {
  width: 225px;
  text-align: center;
}

#monthSelect {
  width: 80px;
  text-align: center;
}

.nav-select:hover {
  border-color: var(--primary-color);
}

.nav-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(139, 0, 0, 0.1);
}

.today-btn {
  padding: 6px 16px;
  font-size: 0.9rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.today-btn:hover {
  background-color: #a00000;
}

.today-btn.hidden {
  visibility: hidden;
}

.month-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
}

.month-title {
  font-size: 1.4rem;
  font-weight: 500;
  min-width: 120px;
}

.nav-btn {
  background: none;
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  font-size: 1rem;
  cursor: pointer;
  border-radius: 4px;
  color: var(--text-color);
  transition: all 0.2s ease;
}

.nav-btn:hover {
  background-color: var(--hover-bg);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* Calendar Grid */
.calendar {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  padding: 20px;
  overflow: hidden;
}

/* Weekday Header (Gregorian view only) */
.weekday-header {
  display: none;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 8px;
}

.weekday-cell {
  text-align: center;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-light);
  padding: 8px 0;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
  width: 100%;
}

.day-cell {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  overflow: hidden;
  min-width: 0;
  max-width: 100%;
}

.day-cell:hover {
  background-color: var(--hover-bg);
  border-color: var(--secondary-color);
}

.day-cell.today {
  background-color: var(--today-bg);
  border: 2px solid var(--today-border);
  position: relative;
}

.day-cell.today::before {
  content: '今';
  position: absolute;
  top: 2px;
  right: 4px;
  font-size: 0.6rem;
  color: var(--today-border);
  font-weight: 600;
}

.day-cell.holiday {
  background-color: #fff5f5;
}

.day-cell.holiday .lunar-day,
.day-cell.holiday .gregorian-day {
  color: var(--holiday-color);
}

.day-cell.jieqi:not(.holiday) {
  background-color: #f5fff5;
}

.day-cell.empty {
  border: none;
  cursor: default;
}

.day-cell.empty:hover {
  background: none;
}

.lunar-day {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-color);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.holiday-name {
  font-size: 0.65rem;
  color: var(--holiday-color);
  font-weight: 500;
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.jieqi-name {
  font-size: 0.65rem;
  color: var(--jieqi-color);
  font-weight: 500;
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.gregorian-date {
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Gregorian view specific styles */
.gregorian-day {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--text-color);
}

.lunar-day-small {
  font-size: 0.7rem;
  color: var(--text-light);
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.lunar-month-name {
  font-size: 0.7rem;
  color: var(--primary-color);
  font-weight: 500;
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.day-cell.lunar-first {
  border-color: var(--secondary-color);
}

/* Footer */
.footer {
  text-align: center;
  margin-top: 30px;
  color: var(--text-light);
  font-size: 0.9rem;
}

.tip-btn {
  margin-top: 15px;
  padding: 8px 20px;
  font-size: 0.9rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tip-btn:hover {
  background-color: #a00000;
}

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

.modal-overlay.show {
  display: flex;
}

.modal-content {
  background: white;
  border-radius: 12px;
  padding: 30px;
  max-width: 320px;
  width: 90%;
  text-align: center;
  position: relative;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 15px;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-light);
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-color);
}

.modal-title {
  font-size: 1.3rem;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.modal-desc {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 20px;
}

.qr-code {
  width: 200px;
  height: 200px;
  margin: 0 auto;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

.qr-code img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-placeholder {
  font-size: 0.8rem;
  color: var(--text-light);
  padding: 20px;
  line-height: 1.5;
}

/* Responsive */
@media (max-width: 600px) {
  .container {
    padding: 10px;
    overflow: hidden;
  }

  .view-toggle {
    margin-bottom: 15px;
  }

  .toggle-btn {
    padding: 5px 15px;
    font-size: 0.85rem;
  }

  .year-title {
    font-size: 1.4rem;
  }

  .quick-nav {
    gap: 6px;
  }

  .select-group {
    gap: 6px;
  }

  .nav-select {
    padding: 5px 8px;
    font-size: 0.75rem;
  }

  #yearSelect {
    width: auto;
    max-width: 180px;
  }

  #monthSelect {
    width: auto;
    max-width: 60px;
  }

  .today-btn {
    padding: 5px 10px;
    font-size: 0.75rem;
  }

  .month-nav {
    gap: 15px;
  }

  .month-title {
    font-size: 1.1rem;
    min-width: 70px;
  }

  .nav-btn {
    padding: 6px 10px;
    font-size: 0.85rem;
  }

  .calendar {
    padding: 10px;
    border-radius: 8px;
    overflow: hidden;
  }

  .weekday-header {
    gap: 2px;
    margin-bottom: 2px;
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }

  .weekday-cell {
    font-size: 0.7rem;
    padding: 4px 0;
  }

  .calendar-grid {
    gap: 2px;
    width: 100%;
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }

  .day-cell {
    padding: 2px 1px;
    border-radius: 4px;
    aspect-ratio: auto;
    min-height: 52px;
    justify-content: flex-start;
    padding-top: 4px;
    overflow: hidden;
    min-width: 0;
    max-width: 100%;
  }

  .day-cell.today::before {
    font-size: 0.45rem;
    top: 1px;
    right: 1px;
  }

  .lunar-day {
    font-size: 0.8rem;
    line-height: 1.2;
  }

  .gregorian-day {
    font-size: 0.9rem;
    line-height: 1.2;
  }

  .gregorian-date {
    font-size: 0.55rem;
    margin-top: 1px;
  }

  .lunar-day-small,
  .lunar-month-name {
    font-size: 0.5rem;
    margin-top: 1px;
  }

  .holiday-name,
  .jieqi-name {
    font-size: 0.45rem;
    margin-top: 1px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
  }
}