:root {
  --green: #2e8b57;
  --orange: #ff8c00;
  --bg: #f5f7f6;
}

/* ===== body ===== */

body {
  margin: 0;
  background: var(--bg);
  font-family:
    "Noto Sans JP",
    "Hiragino Kaku Gothic ProN",
    Meiryo,
    sans-serif;
  color: #333;
  font-size: 15px;
  letter-spacing: 0.1mm;
}

/* ===== header ===== */

.header {
  background: var(--green);
  color: white;
  padding: 18px;
}

.header h1 {
  margin: 0;
  font-size: 20px;
  
  display: flex;
  align-items: center;
}

/* ===== container ===== */

.container {
  max-width: 800px;
  margin: auto;
  padding: 25px;
}

/* ===== card ===== */

.card {
  background: white;
  border-radius: 8px;
  padding: 35px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

/* ===== 追加：date ===== */

.date {
  text-align: right;
  margin-bottom: 10px;
  color: #666;
  font-size: 15px;
}

/* ===== title ===== */

.title {
  font-size: 24px;
  border-left: 6px solid var(--orange);
  padding-left: 12px;
  margin-bottom: 20px;
  margin-top: 0; /* 日付とのバランス調整 */
}

/* ===== content ===== */

.content {
  line-height: 1.9;
}

/* ===== pdf ===== */

.pdf-box {
  margin: 25px 0;
  padding: 15px;
  background: #eef7f1;
  border-left: 5px solid var(--green);
}

.pdf-box a {
  color: var(--green);
  font-weight: bold;
  text-decoration: none;
}

/* ===== calendar ===== */

.calendar-title {
  margin-top: 40px;
  font-size: 20px;
  border-left: 6px solid var(--orange);
  padding-left: 10px;
}

.calendar {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
}

.calendar th {
  background: var(--green);
  color: white;
  padding: 8px;
}

.calendar td {
  border: 1px solid #ddd;
  text-align: center;
  padding: 10px;
}

.calendar .sat {
  background: #edf6ff;
}

.calendar .holiday {
  background: #ffecec;
  color: #c00;
  font-weight: bold;
}

/* ===== button ===== */

.close-area {
  text-align: center;
  margin-top: 35px;
}

.btn {
  background: var(--orange);
  color: white;
  border: none;
  padding: 10px 28px;
  border-radius: 5px;
  cursor: pointer;
}

.btn:hover {
  background: #e67600;
}

/* ===== footer ===== */

.footer {
  text-align: center;
  font-size: 12px;
  color: #777;
  margin: 25px 0;
}

/* ===== responsive ===== */

@media (max-width: 600px) {
  .card {
    padding: 20px;
  }

  .calendar td {
    padding: 6px;
    font-size: 12px;
  }
}