Адаптировать календарь под мобильные устройства

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

:root {
  --primary-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
  --secondary-gradient: linear-gradient(135deg, #f59e0b, #ef4444);
  --lowest-price-gradient: linear-gradient(135deg, #10b981, #059669);
}

body {
  min-height: 100vh;
  background: linear-gradient(135deg, #f3f4f6, #e5e7eb);
  padding: 0.5rem;
  line-height: 1.4;
}

.container {
  max-width: 1100px;
  margin: auto;
  background: white;
  padding: 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

h1 {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-align: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.search-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.input-group {
  position: relative;
}

label {
  display: block;
  margin-bottom: 0.25rem;
  color: #4b5563;
  font-weight: 600;
  font-size: 0.8rem;
}

input,
select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  font-size: 0.875rem;
  transition: all 0.2s ease;
  background: #f9fafb;
}

input:focus,
select:focus {
  outline: none;
  border-color: #6366f1;
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
}

.suggestions {
  position: absolute;
  width: 100%;
  background: white;
  border-radius: 6px;
  max-height: 200px;
  overflow-y: auto;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  margin-top: 0.25rem;
}

.suggestion {
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.875rem;
}

.suggestion:hover {
  background: #f3f4f6;
}

.view-toggle {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.view-toggle button {
  padding: 0.4rem 0.75rem;
  border: none;
  background: #f3f4f6;
  color: #4b5563;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-weight: 600;
  font-size: 0.875rem;
}

.view-toggle button.active {
  background: var(--primary-gradient);
  color: white;
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.3);
}

.calendar {
  display: grid;
  gap: 0.25rem;
}

.year-view {
  grid-template-columns: repeat(auto-fit, minmax(97px, 1fr));
}

.month-view {
  grid-template-columns: repeat(7, 1fr);
}

.day-header {
  text-align: center;
  color: #6b7280;
  font-weight: 600;
  font-size: 0.7rem;
  padding: 0.25rem;
}

.month-card {
  width: 97px;
  height: 58px;
  background: white;
  border-radius: 6px;
  padding: 0.5rem;
  text-align: center;
  border: 1px solid #e5e7eb;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.25rem;
  position: relative;
  /* Для позиционирования спиннера */
}

.month-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  border-color: #6366f1;
}

.month-name {
  font-weight: 600;
  color: #1f2937;
  font-size: 0.8rem;
}

.lowest-price {
  color: #059669;
  font-weight: 600;
  font-size: 0.75rem;
  padding: 0.15rem;
  border-radius: 4px;
  background: #ecfdf5;
}

.day {
  width: 97px;
  height: 58px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.125rem;
  background: linear-gradient(135deg, #0095ff, #1690d7);
  position: relative;
  /* Для позиционирования спиннера */
}

.day:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  border-color: #6366f1;
}

.day.selected {
  background: var(--primary-gradient);
  color: white;
  border: none;
}

.day.lowest-price {
  background: var(--lowest-price-gradient);
  color: white;
  border: none;
}

.day .date {
  font-size: 0.9rem;
  font-weight: 600;
  color: oldlace;
}

.day .weekday {
  font-size: 0.65rem;
  color: #6b7280;
}

.day .price {
  font-size: 0.7rem;
  font-weight: 500;
  color: white;
}

.day.selected .weekday,
.day.selected .price,
.day.lowest-price .weekday,
.day.lowest-price .price {
  color: white;
}

.spinner {
  position: absolute;
  top: 27%;
  bottom: 50%;
  right: 50%;
  left: 42%;
  transform: translate(-50%, -50%);
  width: 24px;
  height: 24px;
  border: 4px solid #f3f4f6;
  border-top: 4px solid #6366f1;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  display: none;
  /* Скрыть по умолчанию */
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

#loading {
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  transform: translate(-50%, -50%);
  background: white;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  display: none;
  font-size: 0.875rem;
}

#results {
  margin-top: 1rem;
  padding: 1rem;
  background: #f9fafb;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
  font-size: 0.875rem;
}

@media (max-width: 768px) {
  .container {
    padding: 0.5rem;
  }

  .search-controls {
    grid-template-columns: 1fr;
  }

  .day {
    width: 44px;
    height: 44px;
  }

  .month-card {
    padding: 0.25rem;
  }

  .month-name {
    font-size: 0.7rem;
  }

  .day .date {
    font-size: 0.8rem;
  }

  .day .weekday {
    font-size: 0.6rem;
  }

  .day .price {
    font-size: 0.65rem;
  }

  .day-header {
    font-size: 0.6rem;
  }

  .calendar.month-view,
  .calendar.year-view {
    gap: 0.15rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0.35rem;
  }

  .calendar.month-view,
  .calendar.year-view {
    gap: 0.1rem;
  }
}

.wran {
  max-width: 761px;
  margin: 0 auto;
}

div#calendar {
  background: #f9fafb;
  padding: 1em;
}

<div class="container">
  <h1>Календарь авиабилетов</h1>

  <div class="search-controls">
    <div class="input-group">
      <label for="origin">Город отправления:</label>
      <input type="text" id="origin" required="" autocomplete="off">
      <div id="origin-suggestions" class="suggestions"></div>
    </div>

    <div class="input-group">
      <label for="destination">Город назначения:</label>
      <input type="text" id="destination" required="" autocomplete="off">
      <div id="destination-suggestions" class="suggestions"></div>
    </div>

    <div class="input-group">
      <label for="year">Год:</label>
      <select id="year" onchange="updateCalendar()">
        <!-- Заполняется динамически -->
        <option value="2025">2025</option>
        <option value="2026">2026</option>
        <option value="2027">2027</option>
      </select>
    </div>
  </div>

  <div class="view-toggle">
    <button onclick="setView('year')" class="">Год</button>
    <button onclick="setView('month')" class="active">Месяц</button>
  </div>
  <div class="wran">
    <div id="calendar" class="calendar month-view">
      <div class="day-header">Вс</div>
      <div class="day-header">Пн</div>
      <div class="day-header">Вт</div>
      <div class="day-header">Ср</div>
      <div class="day-header">Чт</div>
      <div class="day-header">Пт</div>
      <div class="day-header">Сб</div>
      <div></div>
      <div></div>
      <div></div>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">1</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">2</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">3</div>
      <div class="price">
      </div><div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">4</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">5</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"></div>
    </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">6</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"> </div>
    </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">7</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"> </div>
    </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">8</div>
      <div class="price">
      </div><div class="spinner" style="display: none;"></div>
    </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day"><div class="date">9</div><div class="price"></div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day"><div class="date">10</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">11</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">12</div>
      <div class="price">2645 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day lowest-price">
      <div class="date">13</div>
      <div class="price">1850 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day lowest-price">
      <div class="date">14</div>
      <div class="price">1850 ₽</div>
      <div class="spinner" style="display: none;"></div>
    </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">15</div>
      <div class="price">2280 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">16</div>
      <div class="price">2550 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">17</div>
      <div class="price">2686 ₽</div>
      <div class="spinner" style="display: none;">
      </div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">18</div>
      <div class="price">3063 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">19</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">20</div>
      <div class="price">3063 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">21</div>
      <div class="price">2151 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">22</div>
      <div class="price">2980 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">23</div>
      <div class="price">3221 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">24</div>
      <div class="price">2980 ₽</div>
      <div class="spinner" style="display: none;">
      </div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">25</div>
      <div class="price">3221 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">26</div>
      <div class="price">2980 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">27</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">28</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">29</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">30</div>
      <div class="price"></div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
      <a class="day-link" style="text-decoration: none; color: inherit;">
      <div class="day">
      <div class="date">31</div>
      <div class="price">3086 ₽</div>
      <div class="spinner" style="display: none;"></div>
      </div>
    </a>
    </div>
    <div id="loading">Загрузка...</div>
    <div id="results"></div>
  </div>
</div>