/* ================= BODY & SKY ================= */
body {
  font-family: Arial, sans-serif;
  overflow-x: hidden;
  position: relative;
  background: var(--sky-gradient, linear-gradient(to bottom, #87ceeb, #f0f8ff));
  transition: background 1s linear;
}

/* ================= HEADINGS ================= */
h2 {
  text-align: center;
  margin-bottom: 15px;
}

/* ===== TABLE WRAPPER ===== */
.table-wrapper {
  overflow-x: auto;
  overflow-y: auto;
  max-height: 80vh;
  -webkit-overflow-scrolling: touch;
}

/* ===== BASE TABLE STYLE ===== */
table {
  table-layout: fixed;
  width: 90%;
  margin: 0 auto;
  border-collapse: collapse;
  color: #000;
  font-family: Arial, sans-serif;
  background-color: #f3edb0;
  backdrop-filter: blur(4px);
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

th,
td {
  padding: 12px 10px;
  font-size: 12px;
  border: 1px solid #000080;
  text-align: center;
  word-wrap: break-word;
  overflow-wrap: break-word;
  white-space: normal;
  max-width: 150px;
}

/* ===== WEEK HEADER ===== */
.week-header {
  background-color: #f0f0f0;
  cursor: pointer;
  font-weight: bold;
  border-top: 1px solid #000080;
  border-bottom: 1px solid #000080;
  border-left: 1px solid #000080 !important;
  border-right: 1px solid #000080 !important;
}

.week-header td {
  background-color: #f0f0f0;
  font-weight: bold;
  font-size: 16px;
  padding: 08px;
  border: none !important;
}

.week-header td:first-child {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: flex-start;
}

.week-header .arrow {
  display: inline-block;
  transition: transform 0.25s ease;
  color: black;
  font-size: 16px;
  user-select: none;
}

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

.week-title {
  vertical-align: middle;
}

/* ===== STICKY HEADERS ===== */
thead th {
  position: sticky;
  top: 0;
  background-color: #99ccff;
  z-index: 10;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  -webkit-sticky: top;
}

.day-row td:nth-child(2),
thead th:nth-child(2) {
  position: sticky;
  left: 80px;
  background-color: #99ccff;
  font-weight: bold;
  z-index: 4;
}

.day-row:hover {
  background-color: #e6f2ff;
  transition: background 0.2s ease-in-out;
}

/* Popup styling */
.popup {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: white;
  border: 2px solid #007bff;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  padding: 20px;
  z-index: 100;
  width: 300px;
  border-radius: 10px;
}

.popup h3 {
  margin-top: 0;
  color: #007bff;
}
.popup button {
  background: #007bff;
  color: white;
  border: none;
  padding: 6px 12px;
  border-radius: 5px;
  cursor: pointer;
}
.popup button:hover {
  background: #0056b3;
}

.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 50;
}

/* ===== RESPONSIVE ===== */
@media screen and (max-width: 768px) {
  table {
    min-width: 750px;
  }
  th,
  td {
    padding: 8px 10px;
    font-size: 12px;
    max-width: 120px;
    white-space: normal;
  }
  .week-header td {
    font-size: 14px;
  }
  .day-row:hover {
    background-color: #f0f9ff;
  }
}
@media (min-width: 601px) and (max-width: 900px) {
  table {
    width: 95%;
  }
  th,
  td {
    padding: 10px 12px;
    font-size: 13px;
  }
}
@media (min-width: 901px) {
  table {
    width: 80%;
  }
  th,
  td {
    padding: 8px 10px;
    font-size: 12px;
  }
}

/* ===== WEEK COLORING ===== 
.week-15 td {
  background-color: #808080;
  color: #000;
}
  */
.week-15 td {
  background-color: #00ff00;
  color: #000;
}
.week-14 td,
.week-13 td,
.week-12 td,
.week-11 td,
.week-10 td,
.week-09 td,
.week-08 td,
.week-07 td,
.week-06 td,
.week-05 td,
.week-04 td,
.week-03 td {
  background-color: #ff6000;
  color: #000;
}