/* 血圧記録アプリ — 高齢者にも見やすい大きめ文字・大ボタン */
* { box-sizing: border-box; }

body {
  font-family: "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  background-color: #f0f4f8;
  margin: 0;
  padding: 16px;
  color: #222;
  font-size: 18px;
}

.container {
  max-width: 480px;
  margin: 0 auto;
  background: white;
  border-radius: 14px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.10);
  padding: 24px 20px 28px;
  text-align: center;
}

h1 {
  font-size: 26px;
  margin: 4px 0 8px;
}

.subtitle { font-size: 20px; color: #555; margin: 0 0 20px; }
.hint { font-size: 17px; color: #555; text-align: left; }
.error {
  background: #fdecea;
  color: #b71c1c;
  border-radius: 8px;
  padding: 12px;
  font-size: 17px;
}

/* ------- ボタン ------- */
.btn {
  display: block;
  width: 100%;
  padding: 16px;
  margin: 14px 0;
  border: none;
  border-radius: 12px;
  font-size: 20px;
  font-weight: bold;
  text-decoration: none;
  cursor: pointer;
  transition: 0.2s;
}
.btn-big { padding: 26px 16px; font-size: 24px; }
.btn-primary { background: #007bff; color: white; }
.btn-primary:hover { background: #0056b3; }
.btn-secondary { background: #e9eef4; color: #234; }
.btn-secondary:hover { background: #d5dee8; }

.link-small {
  display: inline-block;
  margin-top: 18px;
  font-size: 16px;
  color: #007bff;
}

/* ------- 入力欄 ------- */
label {
  display: block;
  text-align: left;
  margin-top: 14px;
  font-weight: bold;
  font-size: 17px;
}
input[type="text"], input[type="password"], input[type="number"],
input[type="datetime-local"], select {
  width: 100%;
  padding: 14px;
  margin-top: 6px;
  font-size: 20px;
  border: 1px solid #bbb;
  border-radius: 8px;
  background: #f8fbff;
}
.num-big { font-size: 30px; font-weight: bold; text-align: center; }
.checkbox-label {
  font-weight: normal;
  margin-top: 16px;
  font-size: 17px;
}
.checkbox-label input { width: 22px; height: 22px; vertical-align: middle; }

/* ------- 写真・グラフ ------- */
#preview, .thumb, .graph {
  max-width: 100%;
  border-radius: 10px;
  margin: 14px 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.thumb { max-height: 260px; }

/* ------- 読み込み中スピナー ------- */
.spinner {
  margin: 24px auto 12px;
  width: 56px;
  height: 56px;
  border: 7px solid #cfe2ff;
  border-top-color: #007bff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ------- 保存結果 ------- */
.result-box {
  background: #eef7ee;
  border-radius: 12px;
  padding: 14px;
  margin: 14px 0;
}
.result-value { font-size: 22px; margin: 8px 0; }
.result-value b { font-size: 30px; }

/* ------- データ一覧 ------- */
.data-table { margin: 16px 0; text-align: left; }
.data-table summary { font-size: 18px; cursor: pointer; padding: 8px 0; }
.data-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.data-table th, .data-table td {
  border-bottom: 1px solid #ddd;
  padding: 8px 6px;
  text-align: center;
}
.data-table th { background: #f0f4f8; }