/* ========================================
   管理画面スタイル
   ======================================== */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #1e293b;
    --light: #f8fafc;
    --border: #e2e8f0;
    --sidebar-width: 250px;
    --header-height: 60px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--dark);
    background: var(--light);
}

a {
    color: var(--primary);
    text-decoration: none;
}

/* ========================================
   認証画面
   ======================================== */
.auth-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--dark), #334155);
}

.auth-wrapper {
    width: 100%;
    max-width: 400px;
    padding: 1rem;
}

.auth-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.auth-title {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--dark);
}

/* ========================================
   管理画面レイアウト
   ======================================== */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* サイドバー */
.admin-sidebar {
    width: var(--sidebar-width);
    background: var(--dark);
    color: white;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.3s;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
    color: white;
    font-size: 1.25rem;
    font-weight: bold;
}

.sidebar-nav {
    padding: 1rem 0;
}

.nav-section {
    padding: 1rem 1.5rem 0.5rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.5px;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    transition: all 0.2s;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-item.active {
    background: var(--primary);
    color: white;
}

.nav-icon {
    margin-right: 0.75rem;
    font-size: 1rem;
}

/* メインエリア */
.admin-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-width: 0;
}

/* ヘッダー */
.admin-header {
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 50;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.admin-name {
    color: var(--secondary);
}

/* コンテンツ */
.admin-content {
    padding: 1.5rem;
}

/* ========================================
   コンポーネント
   ======================================== */

/* ボタン */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 6px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--secondary);
    color: white;
}

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

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-outline {
    background: white;
    border-color: var(--border);
    color: var(--dark);
}

.btn-outline:hover {
    background: var(--light);
}

.btn-text {
    background: none;
    border: none;
    color: var(--secondary);
    padding: 0.25rem 0.5rem;
}

.btn-text:hover {
    color: var(--dark);
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* カード */
.card {
    background: white;
    border-radius: 8px;
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
}

.card-body {
    padding: 1.5rem;
}

/* アラート */
.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

/* フォーム */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-label .required {
    color: var(--danger);
}

.form-control {
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-help {
    font-size: 0.75rem;
    color: var(--secondary);
    margin-top: 0.25rem;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

/* チェックボックス */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: normal;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary);
    cursor: pointer;
}

/* テーブル */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table th {
    background: var(--light);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--secondary);
}

.table tbody tr:hover {
    background: var(--light);
}

/* バッジ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 4px;
}

.badge-primary { background: #dbeafe; color: var(--primary); }
.badge-success { background: #dcfce7; color: var(--success); }
.badge-warning { background: #fef3c7; color: var(--warning); }
.badge-danger { background: #fee2e2; color: var(--danger); }
.badge-secondary { background: #f1f5f9; color: var(--secondary); }

/* 統計カード */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: white;
    border-radius: 8px;
    border: 1px solid var(--border);
    padding: 1.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--secondary);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
}

/* グリッド */
.grid {
    display: grid;
    gap: 1rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ユーティリティ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }

.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

/* ページヘッダー */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

/* ページネーション */
.pagination {
    display: flex;
    gap: 0.25rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.pagination a,
.pagination span {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.875rem;
}

.pagination a:hover {
    background: var(--light);
}

.pagination .active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* レスポンシブ */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }

    .admin-sidebar.show {
        transform: translateX(0);
    }

    .admin-main {
        margin-left: 0;
    }

    .sidebar-toggle {
        display: block;
    }

    .stats-grid,
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}