/* ========== 全局变量 ========== */
:root {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d28;
    --bg-card: #1e2230;
    --bg-input: #252a3a;
    --bg-hover: #2a3042;
    --text-primary: #e4e6ed;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent: #6366f1;
    --accent-hover: #5457e0;
    --accent-light: rgba(99, 102, 241, 0.15);
    --success: #10b981;
    --success-light: rgba(16, 185, 129, 0.15);
    --danger: #ef4444;
    --danger-light: rgba(239, 68, 68, 0.15);
    --warning: #f59e0b;
    --warning-light: rgba(245, 158, 11, 0.15);
    --border: #2d3344;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-sm: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ========== 导航栏 ========== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 60px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.nav-brand {
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent);
}

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

.nav-tabs {
    display: flex;
    gap: 4px;
}

.nav-tab {
    padding: 8px 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.nav-tab:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-tab.active {
    background: var(--accent-light);
    color: var(--accent);
    font-weight: 600;
}

/* ========== 布局 ========== */
.main-content {
    margin-left: 240px;
    padding: 24px;
    min-height: calc(100vh - 60px);
}

.sidebar {
    position: fixed;
    left: 0;
    top: 60px;
    width: 240px;
    height: calc(100vh - 60px);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 20px;
    overflow-y: auto;
}

.sidebar-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.stat-cards-vertical {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mini-stat {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
}

.mini-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.mini-stat-value {
    font-size: 1.3rem;
    font-weight: 700;
}

.mini-stat-value.positive { color: var(--success); }
.mini-stat-value.negative { color: var(--danger); }
.mini-stat-value.accent { color: var(--accent); }

/* ========== 视图 ========== */
.view {
    display: none;
}

.view.active {
    display: block;
}

/* ========== Tabs ========== */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.tab {
    padding: 10px 24px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

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

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

.tab-panel {
    display: none;
}

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

/* ========== 卡片 ========== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-header .card-title {
    margin-bottom: 0;
}

.panel-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: start;
}

/* ========== 表单 ========== */
.form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

.form input[type="text"],
.form input[type="number"],
.form input[type="date"],
.form select,
.form textarea {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

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

.form textarea {
    resize: vertical;
    font-family: inherit;
}

.form input[type="file"] {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ========== 按钮 ========== */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

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

.btn-ai {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    font-weight: 600;
    border: none;
}

.btn-ai:hover {
    background: linear-gradient(135deg, #5457e0, #7c4ff0);
}

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

.recognize-result {
    display: none;
    background: var(--bg-input);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-top: 8px;
    font-size: 0.85rem;
}

.recognize-result.show {
    display: block;
}

.recognize-result-title {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 8px;
}

.recognize-field {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px solid var(--border);
}

.recognize-field:last-child {
    border-bottom: none;
}

.recognize-field-label {
    color: var(--text-muted);
}

.recognize-field-value {
    color: var(--text-primary);
    font-weight: 500;
}

.recognize-raw-text {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.75rem;
    max-height: 100px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

/* ========== 商品明细表格 ========== */
.items-table {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin: 8px 0;
}

.items-table-header {
    display: flex;
    gap: 6px;
    align-items: center;
    padding: 6px 8px;
    font-size: 0.75rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}

.items-table-row {
    display: flex;
    gap: 6px;
    align-items: center;
    padding: 4px 0;
}

.items-table-row input,
.items-table-row select {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 8px;
    color: var(--text-primary);
    font-size: 0.85rem;
    min-width: 0;
}

.items-table-row input:focus,
.items-table-row select:focus {
    outline: none;
    border-color: var(--accent);
}

.items-table-row .item-remove:hover {
    color: var(--danger);
    background: var(--danger-light);
    border-radius: 4px;
}

@media (max-width: 768px) {
    .items-table-row {
        flex-wrap: wrap;
    }
    .items-table-row .item-name {
        flex: 1 1 100% !important;
    }
}

.recognize-loading {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
}

.recognize-loading::after {
    content: '...';
    animation: dots 1.5s infinite;
}

@keyframes dots {
    0%, 20% { content: '...'; }
    40% { content: '..'; }
    60% { content: '.'; }
    80%, 100% { content: '...'; }
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

.btn-danger {
    background: var(--danger-light);
    color: var(--danger);
    border: 1px solid var(--danger);
}

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

.btn-small {
    padding: 6px 14px;
    font-size: 0.85rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-toggle {
    background: var(--bg-input);
    color: var(--text-secondary);
}

.btn-toggle.active {
    background: var(--accent);
    color: white;
}

/* ========== 预览区 ========== */
.preview-area {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    min-height: 0;
}

.preview-area:empty {
    display: none;
}

.preview-thumb {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
}

.preview-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-remove {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 20px;
    height: 20px;
    background: rgba(0,0,0,0.7);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.7rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ========== 记录列表 ========== */
.record-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 500px;
    overflow-y: auto;
}

.record-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: background 0.2s;
}

.record-item:hover {
    background: var(--bg-hover);
}

.record-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.record-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.record-detail {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.record-note {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.record-amount {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--danger);
    white-space: nowrap;
    margin-left: 12px;
}

.record-amount.revenue {
    color: var(--success);
}

.record-actions {
    display: flex;
    gap: 4px;
    margin-left: 8px;
}

.record-actions button {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.2s;
}

.record-actions button:hover {
    color: var(--danger);
    background: var(--danger-light);
}

.record-thumbs {
    display: flex;
    gap: 4px;
    margin-top: 4px;
}

.record-thumbs img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 4px;
    cursor: pointer;
    border: 1px solid var(--border);
}

.filter-select {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    color: var(--text-primary);
    font-size: 0.85rem;
}

/* ========== 统计卡片 ========== */
.stat-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.stat-card-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.stat-card-value {
    font-size: 1.8rem;
    font-weight: 700;
}

.stat-card-value.positive { color: var(--success); }
.stat-card-value.negative { color: var(--danger); }
.stat-card-value.accent { color: var(--accent); }
.stat-card-value.warning { color: var(--warning); }

.stat-card-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ========== 图表 ========== */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.chart-card {
    min-height: 320px;
}

.chart-card.wide {
    grid-column: span 2;
}

.chart-controls {
    display: flex;
    gap: 4px;
}

.chart-card canvas {
    max-height: 300px;
}

/* ========== 数据管理 ========== */
.data-card {
    max-width: 800px;
}

.data-desc {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.data-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.data-stat {
    background: var(--bg-input);
    border-radius: var(--radius-sm);
    padding: 16px;
    text-align: center;
}

.data-stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
}

.data-stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.data-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 32px;
}

.screenshot-section {
    border-top: 1px solid var(--border);
    padding-top: 24px;
}

.section-title {
    font-size: 1rem;
    margin-bottom: 16px;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
}

.screenshot-item {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
    cursor: pointer;
}

.screenshot-item img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    display: block;
}

.screenshot-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.75);
    color: white;
    padding: 6px 8px;
    font-size: 0.75rem;
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

/* ========== Toast ========== */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: transform 0.3s;
    font-size: 0.9rem;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

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

/* ========== 模态框 ========== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.85);
    justify-content: center;
    align-items: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: white;
    font-size: 2.5rem;
    cursor: pointer;
    line-height: 1;
}

/* ========== 滚动条 ========== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .sidebar {
        display: none;
    }

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

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

    .chart-card.wide {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        height: auto;
        padding: 12px;
        gap: 8px;
    }

    .nav-tabs {
        width: 100%;
        justify-content: center;
    }

    .main-content {
        padding: 16px;
    }

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

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

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

    .data-actions {
        flex-direction: column;
    }

    .data-actions .btn {
        width: 100%;
        justify-content: center;
    }
}