* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #fff;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 10px;
}

.calendar-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 175px;
  gap: 5px;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.calendar-title {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 500;
  margin: 20px 0 30px;
  color: #FFC60C;
  text-transform: capitalize
  letter-spacing: 1px;
}

.month {
  position: relative;
  background-size: cover;
  background-position: center;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  color: white;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.3s ease;
  transform: translateZ(0);
  will-change: transform;
}

.month::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0));
  z-index: 1;
}

.month span {
  position: absolute;
  bottom: 5px;
  left: 5px;
  font-size: 1.4rem;
  text-transform: uppercase;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: 2px;
  z-index: 2;
}

.month:hover {
  z-index: 2;
  transform: scale(1.01);
}

/* -------------------------
   Month-sizing
   ------------------------- */

/* January - 2 columns × 2 rows */
.january {
  grid-column: span 2;
  grid-row: span 2;
}

/* February - 1 column × 1 row */
.february {
  grid-column: span 1;
  grid-row: span 1;
}

/* March, April, May - 1 column × 2 rows */
.march,
.april,
.may {
  grid-column: span 1;
  grid-row: span 2;
}

/* June - 1 column × 3 rows */
.june {
  grid-column: span 1;
  grid-row: span 3;
}

/* July - 1 column × 1 row */
.july {
  grid-column: span 1;
  grid-row: span 1;
}

/* August - 2 columns × 1 row */
.august {
  grid-column: span 2;
  grid-row: span 1;
}

/* September - 1 column × 2 rows */
.september {
  grid-column: span 1;
  grid-row: span 2;
}

/* October - 1 column × 1 row */
.october {
  grid-column: span 1;
  grid-row: span 1;
}

/* November - 1 column × 2 rows */
.november {
  grid-column: span 1;
  grid-row: span 2;
}

/* December - 2 columns × 1 row */
.december {
  grid-column: span 2;
  grid-row: span 1;
}

/* -------------------------
   Responsive Layout
   ------------------------- */
@media (max-width: 768px) {
  .calendar-container {
    grid-template-columns: repeat(2, 1fr);
  }

  .month {
    grid-column: span 2 !important;
    grid-row: auto !important;
  }
}

@media (max-width: 480px) {
  .calendar-container {
    grid-template-columns: 1fr;
  }

  .month {
    grid-column: span 1 !important;
    grid-row: auto !important;
  }
}