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

:root {
    /* 日式極簡色彩系統 - 與前台一致 */
    --color-bg: #faf9f6;
    --color-surface: #ffffff;
    --color-stone-light: #f5f3f0;
    --color-stone: #e8e5e0;
    --color-stone-dark: #d4d0c8;
    --color-beige: #f0ede6;
    --color-text: #2c2c2c;
    --color-text-light: #6b6b6b;
    --color-text-lighter: #9a9a9a;
    --color-accent: #d4a574;
    --color-accent-hover: #c49564;
    --color-border: rgba(212, 210, 200, 0.3);
    --color-danger: #c97a6b;
    --color-danger-hover: #b86a5b;
    --color-success: #8fa68f;
    --color-success-hover: #7d957d;
    --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.06);
    --transition-gentle: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', 'Yu Gothic', 'Meiryo', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    padding: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 24px;
}

header {
    background: var(--color-surface);
    padding: 32px 40px;
    margin-bottom: 32px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    color: var(--color-text);
    font-weight: 400;
    font-size: 24px;
    letter-spacing: -0.02em;
}

.back-link {
    padding: 10px 20px;
    background: transparent;
    color: var(--color-text-light);
    text-decoration: none;
    border: 1px solid var(--color-border);
    font-size: 13px;
    font-weight: 400;
    transition: var(--transition-gentle);
    letter-spacing: 0.02em;
}

.back-link:hover {
    color: var(--color-text);
    border-color: var(--color-stone-dark);
    background: var(--color-stone-light);
}

.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0;
}

.tab-btn {
    padding: 12px 24px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-size: 14px;
    font-weight: 300;
    color: var(--color-text-light);
    transition: var(--transition-gentle);
    letter-spacing: 0.01em;
    margin-bottom: -1px;
}

.tab-btn:hover {
    color: var(--color-text);
    background: var(--color-stone-light);
}

.tab-btn.active {
    color: var(--color-text);
    border-bottom-color: var(--color-accent);
    font-weight: 400;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tab-content.active {
    display: block;
}

.actions {
    background: var(--color-surface);
    padding: 24px;
    margin-bottom: 32px;
    border: 1px solid var(--color-border);
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 24px;
    border: 1px solid var(--color-border);
    cursor: pointer;
    font-size: 13px;
    font-weight: 400;
    transition: var(--transition-gentle);
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-surface);
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0) scale(0.98);
}

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

.btn-danger:hover {
    background: var(--color-danger-hover);
    border-color: var(--color-danger-hover);
    transform: translateY(-1px);
}

.btn-danger:active {
    transform: translateY(0) scale(0.98);
}

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

.btn-success:hover {
    background: var(--color-success-hover);
    border-color: var(--color-success-hover);
    transform: translateY(-1px);
}

.btn-success:active {
    transform: translateY(0) scale(0.98);
}

.products-table {
    background: var(--color-surface);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

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

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

th {
    background: var(--color-stone-light);
    color: var(--color-text);
    font-weight: 400;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

tr {
    transition: var(--transition-gentle);
}

tr:hover {
    background: var(--color-stone-light);
}

td {
    font-size: 13px;
    font-weight: 300;
    color: var(--color-text);
}

.product-image-cell {
    width: 80px;
    text-align: center;
}

.product-image-cell img {
    width: 60px;
    height: 60px;
    object-fit: contain;
    border: 1px solid var(--color-border);
    display: block;
    margin: 0 auto;
}

.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 2px;
    font-size: 11px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 1px solid;
}

.status-available {
    background: var(--color-stone-light);
    color: var(--color-text);
    border-color: var(--color-border);
}

.status-unavailable {
    background: var(--color-stone-light);
    color: var(--color-text-lighter);
    border-color: var(--color-border);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(44, 44, 44, 0.4);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.25s ease;
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--color-surface);
    padding: 40px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--color-border);
    transform: scale(0.96);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
    color: var(--color-text);
    font-size: 20px;
    font-weight: 400;
    letter-spacing: -0.01em;
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--color-text-lighter);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-gentle);
    border-radius: 4px;
}

.close-btn:hover {
    color: var(--color-text);
    background: var(--color-stone-light);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 400;
    color: var(--color-text);
    font-size: 13px;
    letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 14px;
    font-family: inherit;
    font-weight: 300;
    transition: var(--transition-gentle);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-stone-light);
}

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

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.alert {
    padding: 16px 20px;
    margin-bottom: 24px;
    border: 1px solid var(--color-border);
    font-size: 13px;
    font-weight: 300;
    animation: fadeIn 0.3s ease;
}

.alert-success {
    background: var(--color-stone-light);
    color: var(--color-text);
    border-color: var(--color-success);
}

.alert-error {
    background: var(--color-stone-light);
    color: var(--color-text);
    border-color: var(--color-danger);
}

.config-section {
    background: var(--color-surface);
    padding: 32px;
    border: 1px solid var(--color-border);
    margin-bottom: 32px;
}

.config-section h3 {
    color: var(--color-text);
    margin-bottom: 24px;
    font-size: 18px;
    font-weight: 400;
    letter-spacing: -0.01em;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
}

/* 響應式設計 */
@media (max-width: 767px) {
    .container {
        padding: 24px 16px;
    }
    
    header {
        padding: 24px;
        margin-bottom: 24px;
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .tab-btn {
        white-space: nowrap;
    }
    
    .actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        margin-right: 0;
    }
    
    .products-table {
        overflow-x: auto;
    }
    
    table {
        min-width: 800px;
    }
    
    .modal-content {
        padding: 32px 24px;
    }
}