/* =====================================
   リセットとベース
   ===================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #06b6d4;
    --dark-bg: #1e293b;
    --sidebar-bg: #0f172a;
    --content-bg: #f1f5f9;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--content-bg);
}

/* =====================================
   ページレイアウト
   ===================================== */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* =====================================
   ログイン・登録画面
   ===================================== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 450px;
    padding: 40px;
    animation: fadeInUp 0.5s ease;
}

.register-card {
    max-width: 500px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.login-header.warning i {
    color: var(--warning-color);
}

.login-header h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.login-form label i {
    margin-right: 6px;
    color: var(--primary-color);
}

.login-form input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.3s ease;
}

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

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

.form-help {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: var(--text-secondary);
}

.info-box {
    background-color: #dbeafe;
    border-left: 4px solid var(--info-color);
    padding: 12px 15px;
    border-radius: 6px;
    margin: 20px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-box i {
    color: var(--info-color);
    font-size: 20px;
}

.info-box p {
    margin: 0;
    font-size: 13px;
    color: var(--text-primary);
}

/* 承認待ち画面 */
.pending-message {
    text-align: center;
    padding: 30px 20px;
}

.pending-message i {
    font-size: 64px;
    color: var(--warning-color);
    margin-bottom: 20px;
}

.pending-message h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.pending-message p {
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.8;
}

/* =====================================
   ボタン
   ===================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: #475569;
}

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

.btn-success:hover {
    background-color: #059669;
}

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

.btn-warning:hover {
    background-color: #d97706;
}

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

.btn-danger:hover {
    background-color: #dc2626;
}

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

.btn-info:hover {
    background-color: #0891b2;
}

.btn-block {
    width: 100%;
    margin-bottom: 10px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* =====================================
   サイドバー
   ===================================== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 260px;
    background-color: var(--sidebar-bg);
    color: white;
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 25px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-header i {
    font-size: 28px;
    color: var(--primary-color);
}

.sidebar-title {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.3;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 15px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: white;
}

.nav-item.active {
    background-color: rgba(37, 99, 235, 0.2);
    color: white;
    border-left: 3px solid var(--primary-color);
}

.nav-item i {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

.nav-item .badge {
    margin-left: auto;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
}

.user-info i {
    font-size: 36px;
    color: var(--primary-color);
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.user-name {
    font-weight: 600;
    font-size: 14px;
}

.user-role {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

/* =====================================
   メインコンテンツ
   ===================================== */
.main-content {
    margin-left: 260px;
    min-height: 100vh;
    background-color: var(--content-bg);
    transition: margin-left 0.3s ease;
}

.topbar {
    background-color: white;
    padding: 20px 30px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 20px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
}

.page-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.content-area {
    padding: 30px;
}

/* =====================================
   カード
   ===================================== */
.card {
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}

.card-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 25px;
}

.card-footer {
    padding: 15px 25px;
    border-top: 1px solid var(--border-color);
    background-color: #f8fafc;
}

/* =====================================
   統計カード
   ===================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card.clickable {
    cursor: pointer;
}

.stat-card.clickable:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--primary-color);
}

.stat-card.clickable:active {
    transform: translateY(-1px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
}

.stat-icon.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-icon.success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.stat-icon.warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.stat-icon.danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.stat-content h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.stat-content p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* =====================================
   テーブル
   ===================================== */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background-color: #f8fafc;
}

th {
    padding: 12px 15px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 13px;
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 14px;
}

tr:hover {
    background-color: #f8fafc;
}

/* =====================================
   バッジ
   ===================================== */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-primary {
    background-color: #dbeafe;
    color: #1e40af;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-secondary {
    background-color: #f1f5f9;
    color: #475569;
}

.pending-badge {
    background-color: var(--warning-color);
    color: white;
    min-width: 20px;
    height: 20px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
}

/* =====================================
   フォーム
   ===================================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
}

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

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

/* =====================================
   モーダル
   ===================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: white;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideDown 0.3s ease;
}

.modal-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.modal-close:hover {
    background-color: #f1f5f9;
}

.modal-body {
    padding: 25px;
}

.modal-footer {
    padding: 15px 25px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* =====================================
   Toast通知
   ===================================== */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    padding: 15px 20px;
    min-width: 300px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideInRight 0.3s ease;
}

.toast-success {
    border-left: 4px solid var(--success-color);
}

.toast-error {
    border-left: 4px solid var(--danger-color);
}

.toast-warning {
    border-left: 4px solid var(--warning-color);
}

.toast-info {
    border-left: 4px solid var(--info-color);
}

.toast i {
    font-size: 20px;
}

.toast-success i {
    color: var(--success-color);
}

.toast-error i {
    color: var(--danger-color);
}

.toast-warning i {
    color: var(--warning-color);
}

.toast-info i {
    color: var(--info-color);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: 3px;
    color: var(--text-primary);
}

.toast-message {
    font-size: 13px;
    color: var(--text-secondary);
}

/* =====================================
   プログレスバー
   ===================================== */
.progress-bar {
    height: 8px;
    background-color: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color) 0%, #60a5fa 100%);
    transition: width 0.3s ease;
}

/* =====================================
   アクションボタングループ
   ===================================== */
.action-buttons {
    display: flex;
    gap: 8px;
}

.icon-btn {
    background: none;
    border: none;
    padding: 6px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-size: 14px;
}

.icon-btn:hover {
    background-color: #f1f5f9;
}

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

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

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

/* =====================================
   空の状態
   ===================================== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state i {
    font-size: 64px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* =====================================
   ユーザー管理用スタイル
   ===================================== */
.user-approval-card {
    background-color: #fffbeb;
    border-left: 4px solid var(--warning-color);
    padding: 15px 20px;
    margin-bottom: 15px;
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-approval-info h4 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.user-approval-info p {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 3px 0;
}

.user-approval-actions {
    display: flex;
    gap: 10px;
}

.filter-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.filter-tab {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    margin-bottom: -2px;
}

.filter-tab:hover {
    color: var(--text-primary);
}

.filter-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.filter-tab .badge {
    margin-left: 8px;
}

/* =====================================
   レスポンシブデザイン
   ===================================== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

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

    .sidebar-toggle {
        display: block;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .content-area {
        padding: 20px;
    }

    .modal-content {
        width: 95%;
    }

    .toast-container {
        left: 10px;
        right: 10px;
    }

    .toast {
        min-width: auto;
    }
}

/* =====================================
   アニメーション
   ===================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* =====================================
   ユーティリティクラス
   ===================================== */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.flex {
    display: flex;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.gap-10 {
    gap: 10px;
}

.hidden {
    display: none !important;
}