:root {
    --bg-color: #1a1c23;
    --card-bg-color: #242731;
    --border-color: #3e414b;
    --text-color: #e0e0e0;
    --text-secondary-color: #8392a2;
    --primary-color: #00aaff;
    --highlight-color: #00c6ff;
}

/* --- 全局优化 --- */
html, body {
    margin: 0; padding: 0; width: 100%; overflow-x: hidden; -webkit-text-size-adjust: 100%;
}
body {
    background-color: var(--bg-color); color: var(--text-color); font-family: 'Inter', 'Helvetica Neue', 'Hiragino Sans GB', 'Microsoft Yahei', sans-serif;
}
.container {
    max-width: 1600px; margin: 0 auto; padding: 10px;
}
.main-header {
    text-align: center; padding-bottom: 10px; margin-bottom: 0;
}
.main-header h1 {
    font-size: 22px; font-weight: 700; color: var(--highlight-color); margin: 0; text-shadow: 0 0 8px rgba(0, 198, 255, 0.5);
}

/* --- 控制区域 --- */
.controls-wrapper {
    background-color: var(--card-bg-color); padding: 10px; border-radius: 8px; margin-bottom: 15px; border: 1px solid var(--border-color);
}
.controls {
    display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 15px;
}
.btn {
    background-color: var(--bg-color); color: var(--text-secondary-color); border: 1px solid var(--border-color); padding: 6px 10px; border-radius: 6px; cursor: pointer; transition: all 0.2s ease-in-out; text-decoration: none; font-size: 13px; -webkit-tap-highlight-color: transparent;
}
.btn:hover, .btn.active {
    background-color: var(--primary-color); color: #fff; border-color: var(--primary-color);
}
.btn:disabled {
    opacity: 0.5; cursor: not-allowed; background-color: var(--bg-color); color: var(--text-secondary-color); border-color: var(--border-color);
}

/* --- 按钮组样式 --- */
.date-switch-group, .quick-dates {
    display: flex; flex-wrap: nowrap; gap: 8px; align-items: center;
}
.today-btn {
    font-weight: bold; color: var(--highlight-color); border-color: var(--highlight-color);
}
#date-range-picker {
    background-color: var(--bg-color); border: 1px solid var(--border-color); color: var(--text-color); padding: 8px 12px; border-radius: 6px; width: 100%; box-sizing: border-box; text-align: center; max-width: 280px;
}

/* --- KPI 卡片 --- */
.kpi-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 20px;
}
.kpi-card {
    background-color: var(--card-bg-color); padding: 10px; border-radius: 8px; border: 1px solid var(--border-color);
}
.kpi-card h3 { margin: 0 0 5px; font-size: 12px; color: var(--text-secondary-color); font-weight: 500; word-break: break-all; }
.kpi-card p { margin: 0 0 5px; font-size: 20px; font-weight: 700; color: #fff; word-break: break-all; }
#kpi-orders { font-size: 18px; }
.kpi-card.highlight p { color: var(--highlight-color); }
.kpi-card small { font-size: 11px; color: var(--text-secondary-color); }

/* --- 图表/报告区域 --- */
.chart-section-full {
    display: grid; grid-template-columns: 1fr; gap: 15px; margin-bottom: 15px;
}
.chart-wrapper {
    background-color: var(--card-bg-color); padding: 15px; border-radius: 8px; border: 1px solid var(--border-color); display: flex; flex-direction: column;
}
.chart-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.chart-header h2 { margin: 0; font-size: 15px; color: var(--text-color); }
.chart-controls { display: flex; align-items: center; gap: 8px; }
.chart-container { height: 320px; flex-grow: 1; }

/* --- 页脚与加载动画 --- */
.main-footer { text-align: center; margin-top: 15px; padding-top: 15px; border-top: 1px solid var(--border-color); color: var(--text-secondary-color); font-size: 12px; }
#loading-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(26, 28, 35, 0.8); display: flex; justify-content: center; align-items: center; z-index: 9999; }
.spinner { border: 4px solid var(--border-color); border-top: 4px solid var(--primary-color); border-radius: 50%; width: 50px; height: 50px; animation: spin 1s linear infinite; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* --- [全新] 每日明细列表样式 --- */
.report-view {
    height: 400px;
    overflow-y: auto;
}
.report-view::-webkit-scrollbar { width: 6px; }
.report-view::-webkit-scrollbar-track { background: var(--bg-color); }
.report-view::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }

.report-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 5px;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
}
.report-item:hover {
    background-color: #2a2d37;
}
.report-item:last-child {
    border-bottom: none;
}

.report-item-main {
    display: flex;
    align-items: baseline; /* 让日期和金额基线对齐 */
    gap: 12px;
}

.report-item-main .date {
    font-size: 0.9rem;
    color: var(--text-secondary-color);
    width: 90px; /* 固定宽度以对齐 */
}

.report-item-main .revenue {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--highlight-color);
}

.report-item-secondary .orders {
    font-size: 1.0rem;
    font-weight: 500;
    color: var(--text-color);
    background-color: var(--bg-color);
    padding: 4px 8px;
    border-radius: 4px;
}

/* --- 桌面端媒体查询 --- */
@media (min-width: 768px) {
    .container { padding: 20px; }
    .main-header h1 { font-size: 28px; }
    #date-range-picker { width: 280px; }
    .kpi-grid { grid-template-columns: repeat(4, 1fr); gap: 20px; }
    .kpi-card { padding: 20px; }
    .kpi-card h3 { font-size: 16px; }
    .kpi-card p { font-size: 32px; }
    #kpi-orders { font-size: 28px; }
    .kpi-card small { font-size: 12px; }
    .chart-header h2 { font-size: 18px; }
    .chart-container, .report-view { height: 400px; }
    
    /* 桌面端放大字体 */
    .report-item-main .date { font-size: 1.0rem; }
    .report-item-main .revenue { font-size: 1.4rem; }
    .report-item-secondary .orders { font-size: 1.1rem; }
}
@media (min-width: 1200px) {
    .controls { flex-wrap: nowrap; justify-content: space-between; }
}