/* (A) ENTIRE PAGE */
* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}
body {
  position: relative;
  padding: 0; margin: 0;
  overflow-x: hidden;
}

:root {
  --bg-color-a: #88DAEF; /* page header + form label */
  --bg-color-b: #939393; /* calendar header */
  --bg-color-c: #d73a3a; /* buttons */
}

.hide { display: none !important; }

/* (B) PERIOD SELECTOR */
#calPeriod {
  padding: 15px;
  background: var(--bg-color-a);
}
#calPeriod input, #calPeriod select {
  font-size: 24px;
  font-weight: bold;
  border: 0; outline: none;
  color: #6A0C0E; background: 0;
  cursor: pointer;
}
#calPeriod option { color: #000; }
#calYear {
  width: 100px;
  margin-left: 10px;
}

/* (C) CALENDAR */
/* (C1) SHARED */
.calHead, .calRow { display: flex; }
.calCell { width: 14.2857%; }

/* (C2) HEADER - DAY NAMES */
.calHead .calCell {
  color: #fff; background: var(--bg-color-b);
  font-weight: 700; text-align: center;
  padding: 15px 0;
}

/* (C3) BODY - INDIVIDUAL DAYS */
.calBlank { background: #eee; }
.calToday { background: #feffd3; }
.calToday .cellDate { color: #ff9b9b; }
.calBody .calCell {
  border: 1px solid #f5f5f5;
  min-height: 80px;
}
.cellDate, .evt { padding: 5px; }
.cellDate {
  font-size: 14px;
  font-weight: 700;
  color: #3F3F3F;
}
.evt {
  font-size: 14px;
  white-space: nowrap; text-overflow: ellipsis;
  overflow: hidden;
  cursor: pointer;
}

/* (D) EVENT FORM */
#calForm {
  position: absolute; top: 0; left: 0; z-index: 999;
  width: 100vw; height: 100%; min-height: 100vh;
  padding: 0; margin: 0; border: 0;
  background: rgba(0,0,0,0.5);
}
#calForm:is([open]) {
  display: flex; flex-wrap: wrap;
  align-items: center; justify-content: center;
}
#calForm form {
  position: relative;
  width: 450px; padding: 15px;
  border-radius: 10px;
  background: #fff;
}
#evtClose {
  position: absolute;
  top: 0; right: 0;
  padding: 10px;
  color: #b12020;
  font-size: 28px;
  font-weight: 700;
  cursor: pointer;
}
#calForm h2 { margin: 0 0 15px 0; }
#calForm label, #calForm input[type=text], #calForm textarea { width: 100%; }
#calForm label {
  color: #a1a1a1;
  font-weight: 700;
  font-size: 12px;
  margin-bottom: 5px;
}
#calForm input[type=text], #calForm textarea {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
  border: 1px solid #eee;
  background: #f5f5f5;
}
#calForm textarea {
  height: 100px;
  resize: none;
}
#calForm input[type=button], #calForm input[type=submit] {
  border: 0; padding: 10px; margin: 10px 2px 0 0;
  color: #fff; background: var(--bg-color-c);
  cursor: pointer;
}