/* コレスタ 共通スタイル */

:root {
  --primary:   #3498db;
  --success:   #2ecc71;
  --accent:    #9b59b6;
  --danger:    #e74c3c;
  --bg:        #f0f4f8;
  --card-bg:   #ffffff;
  --border:    #dce3ec;
  --text:      #2c3e50;
  --text-muted: #6c7a8a;
}

* { box-sizing: border-box; }

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  margin: 0; padding: 0; line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

/* ===== ヘッダー共通 ===== */
header {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

/* ===== ボタン共通 ===== */
.btn {
  border: none; padding: 10px 20px; border-radius: 8px;
  cursor: pointer; font-weight: bold; font-size: 14px;
  transition: all 0.2s; display: inline-flex; align-items: center; gap: 8px;
}
.btn:hover { opacity: 0.85; transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: white; }
.btn-success { background: var(--success); color: white; width: 100%; justify-content: center; font-size: 15px; }
.btn-danger  { background: var(--danger); color: white; }
.btn-outline {
  background: white; border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { background: var(--bg); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-back {
  background: #eef2f7; color: var(--text-muted);
  padding: 8px 16px; border-radius: 8px; font-size: 13px;
  cursor: pointer; border: 1px solid var(--border);
}
.btn-back:hover { background: #e2e8f0; }

/* ===== フォーム要素 ===== */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 11px 14px;
  background: #ffffff;
  border: 1px solid #c8d3df;
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}
input::placeholder, textarea::placeholder { color: #aab4c0; }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(52,152,219,0.15);
}
select option { background: #fff; color: var(--text); }

/* ===== コンテナ ===== */
.container { max-width: 720px; margin: 0 auto; padding: 20px; }

/* ===== スクロールバー ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #c8d3df; border-radius: 3px; }

/* ===== モバイル共通 ===== */
@media (max-width: 600px) {
  header { padding: 10px 14px; }
  .container { padding: 12px; }

  /* タッチターゲット確保 */
  .btn { min-height: 44px; }
  .btn-sm { min-height: 38px; padding: 8px 14px; font-size: 13px; }
  .btn-back { min-height: 38px; }

  /* フォーム要素を大きく */
  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="number"],
  select,
  textarea {
    font-size: 16px; /* iOS zoom防止 */
    padding: 12px 14px;
  }
}