:root {
    /* ブランドカラー */
    --color-primary-light: #3b82f6;
    --color-primary: #2563eb;

    --color-success-light: #22c55e;
    --color-success: #16a34a;

    --color-warning-light: #fde047;
    --color-warning: #eab308;

    --color-danger: #ef4444;

    /* グレースケール・ニュートラルカラー */
    --color-white: #fff;
    --color-black: #000;

    --color-gray-100: #f5f6f8;
    /* 背景色、非活性ボタン */
    --color-gray-200: #e5e7eb;
    /* ボーダー、標準ボタン、メニューリンク */
    --color-gray-300: #d1d5db;
    /* グレースケール中間 - ボタン用等 */
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    /* サブテキスト、非活性テキスト */
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    /* メインテキスト、ホバー時背景 */
    --color-gray-800: #1f2937;
    /* ヘッダー、サイドバー */

    /* セマンティックカラー（特定の背景色など） */
    --color-bg-table-th: #f9fafb;
    --color-bg-table-stripe: #f0f9ff;
    --color-bg-table-selected: #e0f2fe;

    /* シャドウ */
    --shadow-sm: 5px 5px 10px rgba(153, 153, 153, 0.5);
}

body {
    font-family: Arial, "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
    background: var(--color-gray-100);
    margin: 0;
    min-height: 100vh;
}

h1 {
    font-size: 22px;
    margin: 0;
}

.page-header {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
}

/* ===== フラッシュメッセージ (H1隣接) ===== */
.flash-message {
    font-size: 14px;
    font-weight: normal;
    margin-left: 16px;
    padding: 4px 12px;
    border-radius: 4px;
    color: var(--color-white);
    animation: fadeIn 0.3s ease-out;
}

.flash-success {
    background-color: var(--color-success);
}

.flash-error {
    background-color: var(--color-danger);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.card {
    background: var(--color-white);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 20px;
    border: 1px solid var(--color-gray-200);
}

/* ===== 共通レイアウト ===== */
.layout {
    display: flex;
    min-height: 100vh;
    padding-top: 48px;
}

.header {
    height: 48px;
    background: var(--color-gray-800);
    color: var(--color-white);
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 12px;
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1100;
}

.hamburger {
    font-size: 22px;
    cursor: pointer;
    user-select: none;
    display: none;
}

.system-title {
    font-size: 18px;
    white-space: nowrap;
}

.sidebar {
    width: 220px;
    box-sizing: border-box;
    background: var(--color-gray-800);
    color: var(--color-white);
    padding: 16px 12px;
    position: sticky;
    top: 48px;
    height: calc(100vh - 48px);
    display: flex;
    flex-direction: column;
}

.menu {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 13px;
}

.menu.main {
    padding-top: 12px;
    border-top: 1px solid var(--color-gray-700);
}

.menu.logout {
    margin-top: auto;
    padding: 12px 0 24px;
    border-top: 1px solid var(--color-gray-700);
}

.menu li {
    margin-bottom: 6px;
}

.menu a {
    display: flex;
    justify-content: space-between;
    padding: 8px 10px;
    color: var(--color-gray-200);
    text-decoration: none;
    border-radius: 4px;
}

.menu a:hover {
    background: var(--color-gray-700);
}

.menu a.active {
    background: var(--color-primary);
    color: var(--color-white);
}

.menu a::after {
    content: "▶";
    font-size: 10px;
    opacity: 0.7;
}

.menu-title {
    display: block;
    padding: 8px 10px;
    color: var(--color-gray-400);
}

.submenu {
    margin-left: 12px;
    margin-top: 4px;
}

.content {
    flex: 1;
    padding: 16px;
    overflow-x: auto;
}

/* ===== UI要素 ===== */
input,
select {
    padding: 6px 8px;
    border: 1px solid var(--color-gray-300);
    border-radius: 4px;
    font-size: 14px;
}

button {
    padding: 12px 16px;
    border: none;
    border-radius: 9999px;
    font-size: 14px;
    cursor: pointer;
    transition: box-shadow 0.2s ease, transform 0.1s ease;
    box-shadow: var(--shadow-sm);
}

button:hover {
    transform: translateY(-1px);
}

button:active {
    transform: translateY(0);
}

.btn-search {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    color: var(--color-white);
    padding: 14px 26px;
    font-weight: 600;
    max-width: 150px;
    width: 100%;
}

.btn-add {
    background: linear-gradient(135deg, var(--color-success-light), var(--color-success));
    color: var(--color-white);
    margin-bottom: 16px;
    padding: 14px 26px;
    font-weight: 600;
    max-width: 150px;
    width: 100%;
}

.btn-edit {
    background: linear-gradient(135deg, var(--color-warning-light), var(--color-warning));
    color: var(--color-black);
    padding: 8px 14px;
    border-radius: 9999px;
    font-size: 13px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th,
td {
    border-bottom: 1px solid var(--color-gray-200);
    padding: 10px 8px;
    text-align: left;
}

th {
    background: var(--color-bg-table-th);
}

/* ===== 選択可能テーブル行 ===== */
.selectable-row:hover {
    background: var(--color-bg-table-stripe);
    cursor: pointer;
}

.selectable-row.selected td {
    background: var(--color-bg-table-selected) !important;
}

/* ===== ページング ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.pagination button {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
    padding: 8px 14px;
    box-shadow: none;
    border-radius: 4px;
}

.pagination .active {
    background: var(--color-gray-700);
    color: var(--color-white);
}

.pagination button:disabled {
    background: var(--color-gray-100);
    color: var(--color-gray-400);
    cursor: default;
}

@media (max-width: 1024px) {
    .hamburger {
        display: block;
    }

    .sidebar {
        position: fixed;
        left: -220px;
        transition: left 0.3s ease;
        z-index: 1000;
    }

    .sidebar.open {
        left: 0;
    }
}

/* ===== 検索用テーブル ===== */
.search-form-table {
    width: 100%;
    max-width: 900px;
    border-collapse: separate;
    border-spacing: 0 16px;
}

.search-form-table th,
.search-form-table td {
    border: none;
    padding: 0;
    background: transparent !important;
    vertical-align: middle;
}

.search-form-table th {
    font-size: 13px;
    color: var(--color-gray-700);
    font-weight: normal;
    text-align: left;
    padding-right: 12px;
}

.search-form-table td input,
.search-form-table td select {
    width: 100%;
    box-sizing: border-box;
}

.col-search-label {
    width: 120px;
}

.col-search-input {
    width: 250px;
}

.col-search-label-wide {
    width: 150px;
}

.search-spacer {
    width: 40px;
}

.search-actions-row {
    margin-top: 8px;
    text-align: center;
}

/* ===== フォーム行の共通スタイル ===== */
.form-row {
    display: grid;
    grid-template-columns: 160px minmax(200px, 360px);
    gap: 12px;
    align-items: center;
    margin-bottom: 16px;
}

.form-row>label:first-child,
.form-row label:not(.btn-browse) {
    font-size: 13px;
    color: var(--color-gray-700);
}

/* ===== ボタン配置の共通スタイル ===== */
.button-row {
    display: flex;
    justify-content: space-between;
    margin-top: 24px;
}

.button-row.right {
    justify-content: flex-end;
}

.table-button-row {
    display: flex;
    justify-content: flex-end;
    gap: 6px;
    margin-top: 8px;
}

.btn-small {
    font-size: 13px;
    padding: 8px 16px;
    max-width: 90px;
    width: auto;
}

/* ===== 画面固有ボタン色 ===== */
.btn-save {
    background: linear-gradient(135deg, var(--color-success-light), var(--color-success));
    color: var(--color-white);
}

/* 行操作用グレーボタン */
.btn-gray {
    background: linear-gradient(135deg, var(--color-gray-200), var(--color-gray-300));
    color: var(--color-gray-700);
}

.btn-delete {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: var(--color-white);
}

/* ===== ユーティリティ ===== */
.hidden {
    display: none !important;
}

.error-card {
    border-left: 5px solid #ff4d4f;
    margin-bottom: 20px;
}

.error-list {
    color: #ff4d4f;
    margin: 0;
    padding-left: 20px;
}