/* ========================================
   リセット & ベーススタイル
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* カラーパレット */
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    /* ステータスカラー */
    --status-pending: #f59e0b;
    --status-confirmed: #3b82f6;
    --status-uploaded: #8b5cf6;
    --status-paid: #10b981;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    
    /* テキスト色 */
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    
    /* ボーダー */
    --border-color: #e5e7eb;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    
    /* シャドウ */
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

/* ========================================
   画面管理
   ======================================== */
.screen {
    display: none;
}

.screen.active {
    display: block;
}

/* ========================================
   ログイン画面
   ======================================== */
#loginScreen.active {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    padding: 3rem;
    max-width: 500px;
    width: 100%;
    animation: fadeInUp 0.5s ease;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.login-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ログインフォーム */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.login-form h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.login-form .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.login-form label {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.login-form input {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.login-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.btn-full {
    width: 100%;
}

.login-footer {
    text-align: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.login-footer p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-link:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* ========================================
   ヘッダー
   ======================================== */
.app-header {
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-left i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.header-left h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.user-role {
    background: var(--bg-secondary);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-logout {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-logout:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

/* ========================================
   メインコンテンツ
   ======================================== */
.main-content {
    padding: 2rem;
    min-height: calc(100vh - 80px);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* ========================================
   セクション
   ======================================== */
section {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    padding: 1.5rem;
    margin-bottom: 2rem;
    animation: fadeIn 0.5s ease;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-header i {
    color: var(--primary-color);
}

.btn-refresh {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

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

/* ========================================
   アップロードフォーム
   ======================================== */
.upload-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.form-group input[type="text"],
.form-group input[type="month"],
.form-group input[type="date"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    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(59, 130, 246, 0.1);
}

/* ファイルドロップゾーン */
.file-drop-zone {
    border: 3px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 3rem 2rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.file-drop-zone:hover,
.file-drop-zone.drag-over {
    border-color: var(--primary-color);
    background: #eff6ff;
}

.file-drop-zone i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.file-drop-zone p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.or-text {
    color: var(--text-light);
    font-size: 0.9rem;
}

.file-info {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    display: none;
}

.file-info.active {
    display: block;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

/* ========================================
   ボタンスタイル
   ======================================== */
.btn-primary,
.btn-secondary,
.btn-export {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--secondary-color);
}

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

.btn-export:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   ダッシュボード
   ======================================== */
.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: white;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: rgba(255, 255, 255, 0.2);
}

.stat-icon.blue { background: rgba(59, 130, 246, 0.3); }
.stat-icon.orange { background: rgba(245, 158, 11, 0.3); }
.stat-icon.red { background: rgba(239, 68, 68, 0.3); }
.stat-icon.green { background: rgba(16, 185, 129, 0.3); }

.stat-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-content p {
    font-size: 0.9rem;
    opacity: 0.9;
}

.chart-container {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

/* ========================================
   フィルターコントロール
   ======================================== */
.filter-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.filter-group {
    display: flex;
    gap: 0.5rem;
}

.filter-group input,
.filter-group select {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    width: 100%;
    transition: all 0.3s ease;
}

.filter-group input:focus,
.filter-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* ========================================
   請求書一覧
   ======================================== */
.invoices-list,
.history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.invoice-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 1.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.invoice-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.invoice-card.overdue {
    border-color: var(--danger-color);
    background: #fef2f2;
}

.invoice-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.invoice-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.invoice-title h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
}

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

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

.status-badge.uploaded {
    background: #ede9fe;
    color: #5b21b6;
}

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

.invoice-body {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.invoice-field {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.invoice-field label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.invoice-field span {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.invoice-field.amount span {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.invoice-badges {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.info-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-badge.freee {
    background: #ede9fe;
    color: #5b21b6;
}

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

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

/* ========================================
   モーダル
   ======================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
    overflow-y: auto;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 1200px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 2px solid var(--border-color);
    position: sticky;
    top: 0;
    background: var(--bg-primary);
    z-index: 10;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

.invoice-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.invoice-info,
.invoice-preview {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--border-radius-sm);
}

.invoice-info h3,
.invoice-preview h3,
.invoice-extracted h3,
.invoice-memo h3,
.invoice-comments h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
    border-bottom: none;
}

.info-item label {
    font-weight: 600;
    color: var(--text-secondary);
}

.info-item span {
    color: var(--text-primary);
    font-weight: 500;
}

.info-item select {
    padding: 0.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
}

.checkbox-item label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.pdf-preview {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    overflow: hidden;
}

.pdf-preview canvas {
    max-width: 100%;
    height: auto;
}

.invoice-extracted,
.invoice-memo,
.invoice-comments {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1.5rem;
}

.extracted-info {
    background: var(--bg-primary);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.extracted-info p {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.invoice-memo textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-family: inherit;
    font-size: 1rem;
    margin-bottom: 1rem;
    resize: vertical;
}

.invoice-memo textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* コメントセクション */
.comments-list {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 1rem;
}

.comment-item {
    background: var(--bg-primary);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.comment-author {
    font-weight: 600;
    color: var(--primary-color);
}

.comment-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.comment-text {
    color: var(--text-primary);
    line-height: 1.6;
}

.comment-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.comment-form input,
.comment-form textarea {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-family: inherit;
    font-size: 1rem;
}

.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* 管理者操作ボタン */
.invoice-actions {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1.5rem;
    border: 2px solid var(--border-color);
}

.invoice-actions h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.action-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-approve {
    background: var(--success-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    justify-content: center;
}

.btn-approve:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-reject {
    background: var(--warning-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    justify-content: center;
}

.btn-reject:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-delete {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    justify-content: center;
}

.btn-delete:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* freee連携状況パネル */
.freee-status-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    color: white;
}

.freee-status-section .section-header h2 {
    color: white;
}

.freee-status-section .section-header i {
    color: white;
}

.btn-help {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.btn-help:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: white;
    transform: translateY(-1px);
}

.freee-status-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    color: var(--text-primary);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
}

.status-indicator i {
    font-size: 0.75rem;
    color: var(--warning-color);
    animation: pulse 2s infinite;
}

.status-indicator.active i {
    color: var(--success-color);
    animation: none;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.3;
    }
}

.status-details {
    color: var(--text-primary);
}

.status-details p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.status-details ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.status-details li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.status-details code {
    background: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--primary-color);
}

/* 差し戻し理由表示 */
.reject-reason-box {
    background: #fef2f2;
    border: 2px solid #fca5a5;
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.reject-reason-box i {
    color: var(--danger-color);
    font-size: 1.25rem;
}

.reject-reason-box strong {
    color: var(--danger-color);
    font-weight: 600;
}

.reject-reason-box p {
    color: var(--text-primary);
    margin: 0;
    line-height: 1.6;
}

.invoice-card.rejected {
    border-color: var(--danger-color);
    background: #fef2f2;
}

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

/* ========================================
   トースト通知
   ======================================== */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--text-primary);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    display: none;
    animation: slideInRight 0.3s ease;
}

.toast.active {
    display: block;
}

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

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

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

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

/* ========================================
   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 slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

/* ========================================
   レスポンシブデザイン
   ======================================== */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .header-left,
    .header-right {
        width: 100%;
        justify-content: center;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    section {
        padding: 1rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .dashboard-cards {
        grid-template-columns: 1fr;
    }
    
    .invoice-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-controls {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-export {
        width: 100%;
    }
    
    .invoice-body {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        max-height: 100vh;
        border-radius: 0;
    }
    
    .toast {
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
    }
}

@media (max-width: 480px) {
    .login-container {
        padding: 2rem 1.5rem;
    }
    
    .login-header h1 {
        font-size: 1.5rem;
    }
    
    .role-btn {
        padding: 1rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .stat-content h3 {
        font-size: 1.5rem;
    }
}

/* ========================================
   印刷用スタイル
   ======================================== */
@media print {
    body {
        background: white;
    }
    
    .app-header,
    .btn-logout,
    .btn-refresh,
    .btn-export,
    .filter-section,
    .toast {
        display: none;
    }
    
    .main-content {
        padding: 0;
    }
    
    section {
        box-shadow: none;
        page-break-inside: avoid;
    }
}