@charset "utf-8";
        /* 1. 全体リセット & 基本設定 */
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
            background-color: #f4f7f6;
            color: #333;
            line-height: 1.6;
            padding: 20px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        h1 {
            text-align: center;
            color: #1e3d59;
            margin-bottom: 30px;
            font-size: 1.8rem;
        }

        /* 2. メインレイアウト（PC時は2カラム、スマホ時は縦並び） */
        .app-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        @media (min-width: 992px) {
            .app-layout {
                grid-template-columns: 320px 1fr;
            }
        }

        /* 3. カードスタイル */
        .card {
            background: #ffffff;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            padding: 24px;
            margin-bottom: 20px;
        }
        .card-title {
            font-size: 1.8rem;
            color: #1e3d59;
            margin-bottom: 15px;
            border-bottom: 2px solid #e8eff2;
            padding-bottom: 8px;
        }

        /* 4. フォーム部品のスタイリング */
        .form-group { margin-bottom: 15px; }
        .form-row {
            display: flex;
            gap: 10px;
            margin-bottom: 15px;
        }
        .form-row .form-group {
            flex: 1;
            margin-bottom: 0;
        }
        label {
            display: block;
            font-size: 1.6rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: #555;
        }
        input[type="number"],
        input[type="date"],
        select {
            width: 100%;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 4px;
            font-size: 1.6rem;
            background-color: #fff;
            transition: border-color 0.2s;
        }
        input:focus, select:focus {
            outline: none;
            border-color: #1e3d59;
        }

        /* 5. ボタン */
        .btn {
            display: inline-block;
            width: 100%;
            padding: 12px;
            font-size: 1.3rem;
            font-weight: bold;
            text-align: center;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .btn-primary {
            background-color: #ff6e40;
            color: #fff;
        }
        .btn-primary:hover { background-color: #e65527; }
        .btn-outline {
            background-color: transparent;
            border: 1px solid #1e3d59;
            color: #1e3d59;
        }
        .btn-outline:hover {
            background-color: #1e3d59;
            color: #fff;
        }

        /* 6. 計算結果セクション */
        .result-card {
            border-left: 5px solid #ff6e40;
        }
        .meta-info {
            font-size: 1.5rem;
            color: #666;
            margin-bottom: 12px;
        }
        .result-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .result-table th, .result-table td {
            border: 1px solid #e0e0e0;
            padding: 10px;
            text-align: left;
        }
        .result-table th { background-color: #f9fbfb; font-weight: 600; }
        .text-success { color: #2e7d32; font-weight: bold; }
        .text-danger { color: #c62828; font-weight: bold; }
        .text-primary { color: #1565c0; font-weight: bold; }
        .text-muted { color: #757575; }

        .day-length-box {
            margin-top: 15px;
            background-color: #1e3d59;
            color: #fff;
            padding: 12px;
            border-radius: 4px;
            text-align: center;
        }
        .day-length-box span { font-size: 1.3rem; opacity: 0.9; }
        .day-length-box strong { display: block; font-size: 1.8rem; color: #ffc107; margin-top: 2px; }

        /* 7. 地図セクション */
        #map {
            height: 500px;
            width: 100%;
            border-radius: 6px;
            border: 1px solid #ddd;
        }
        @media (min-width: 992px) {
            #map { /* height: 100%; */ min-height: 550px; }
            .map-container { display: flex; flex-direction: column; height: 100%; }
            .map-container .card-body { flex: 1; }
        }