/*
  Author: Rainers
  Last Modified: 2025-05-25
*/

:root {
  --main: #3a7afe;
  --bg: #f5f7fa;
  --white: #fff;
  --radius: 12px;
  --shadow: 0 2px 16px rgba(60, 72, 88, 0.07);
  --danger: #ff4d4d;
  --text: #222;
  --muted: #7a7a7a;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
}

.calendar-container {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 22px 20px 22px;
  max-width: 370px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.calendar-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  color: var(--main);
  border-radius: var(--radius);
  padding: 0;
  font-size: 1.08rem;
  margin-bottom: 2px;
}

.calendar-controls button {
  background: none;
  border: none;
  color: var(--main);
  font-size: 1.2rem;
  border-radius: 6px;
  padding: 5px 12px;
  cursor: pointer;
  transition: background 0.18s, color 0.18s;
}

.calendar-controls button:hover {
  background: var(--hover-bg);
  color: var(--main);
}

#month-year {
  font-weight: 600;
  font-size: 1.08rem;
  color: var(--text);
  letter-spacing: 0.5px;
}

.calendar {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 3px;
  background: none;
  border-radius: var(--radius);
  padding: 0;
  min-height: 240px;
}

.day-of-week {
  font-weight: 500;
  text-align: center;
  color: var(--muted);
  font-size: 0.97rem;
  margin-bottom: 2px;
  background: none;
  padding: 2px 0 6px 0;
  user-select: none;
}

.day {
  background: var(--white);
  border-radius: 8px;
  padding: 10px 0;
  text-align: center;
  cursor: pointer;
  font-size: 1.02rem;
  transition: background 0.13s, color 0.13s, box-shadow 0.13s;
  border: 1px solid transparent;
  min-height: 34px;
  user-select: none;
  color: var(--text);
}

.day.has-event {
  background: var(--event-bg);
  font-weight: 600;
  border-color: var(--main);
  color: var(--main);
}

.day:hover {
  background: var(--hover-bg);
}

.day.selected {
  background: var(--main) !important;
  color: var(--white);
  border-color: var(--main);
  box-shadow: 0 2px 8px rgba(58, 122, 254, 0.09);
}

#event-form {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 0;
  padding: 0;
}

#event-form input {
  flex: 1;
  padding: 8px 10px;
  font-size: 1rem;
  border: 1.2px solid #e0e0e0;
  border-radius: 7px;
  background: #fafbfc;
  transition: border 0.15s;
}

#event-form input:focus {
  border-color: var(--main);
  background: #fff;
  outline: none;
}

#event-form button {
  padding: 8px 16px;
  font-size: 1rem;
  background: var(--main);
  color: #fff;
  border: none;
  border-radius: 7px;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.18s;
}

  #event-form button:hover {
  background: var(--hover-bg);
  color: var(--main); 
}

#events {
  margin: 0;
  padding: 0;
}

#events h3 {
  margin: 0 0 8px 0;
  font-size: 1.04rem;
  font-weight: 600;
  color: var(--main);
}

.event {
  background: #f5f7fa;
  color: var(--main);
  padding: 8px 12px;
  border-radius: 7px;
  margin-bottom: 7px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  border: 1px solid #e3e9f7;
}

.event button {
  background: none;
  border: none;
  color: var(--danger);
  font-size: 0.98rem;
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 4px;
  transition: background 0.13s, color 0.13s;
}

.event button:hover {
  background: var(--hover-bg);
  color: #c00;
}

#events p {
  color: var(--muted);
  margin: 0 0 0 2px;
  font-size: 0.98rem;
}

@media (max-width: 600px) {
  .calendar-container {
    max-width: 98vw;
    padding: 10px 2vw 12px 2vw;
  }

  .calendar {
    min-height: 160px;
    padding: 0;
  }

}