/* 基础样式 — Streamlit 风格 */
:root {
    --primary: #ff4b4b;
    --primary-hover: #ff6b6b;
    --primary-text: #ffffff;
    --background: #ffffff;
    --page-bg: #f0f2f6;
    --text: #262730;
    --text-secondary: #555867;
    --text-muted: #8a8c9c;
    --border: #d6d6d8;
    --border-light: #e6e6e9;
    --success: #21c354;
    --warning: #faca2b;
    --danger: #ff4b4b;
    --info: #00acb5;
    --header-bg: #ffffff;
    --row-hover: #f0f2f6;
    --card-shadow: 0 1px 2px rgba(0,0,0,0.05);
    --font: "Source Sans Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --radius: 4px;
    --radius-lg: 8px;
}

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

body {
    font-family: var(--font);
    background-color: var(--page-bg);
    color: var(--text);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Loading遮罩层 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-overlay-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 12px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
}

/* 导航栏 */
.navbar {
    background-color: var(--header-bg);
    color: var(--text);
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

.nav-brand { font-size: 1.25rem; font-weight: 600; color: var(--text); }
.nav-links { display: flex; gap: 0.5rem; align-items: center; }
.nav-user {
    margin-left: 1rem;
    padding-left: 1rem;
    border-left: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.nav-user-name {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}
.nav-logout {
    color: var(--text-muted);
    font-size: 0.85rem;
}
.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
    transition: background-color 0.15s, color 0.15s;
}
.nav-link:hover { background-color: var(--row-hover); color: var(--text); }
.nav-link.active {
    background-color: var(--primary);
    color: var(--primary-text);
    font-weight: 500;
}

/* 容器 */
.container { max-width: 1200px; margin: 1.5rem auto; padding: 0 1.5rem; }
.container h1 {
    margin-bottom: 1.25rem;
    color: var(--text);
    font-size: 1.75rem;
    font-weight: 600;
}

/* 卡片 */
.card {
    background: var(--background);
    border-radius: var(--radius-lg);
    padding: 1.5rem 1.75rem;
    margin-bottom: 1.25rem;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-light);
}
.card h3 { margin-bottom: 1rem; color: var(--text); font-size: 1.1rem; font-weight: 600; }

/* 表单组 */
.form-group { margin-bottom: 1rem; }
.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 400;
    color: var(--text);
    font-size: 0.95rem;
}
/* 范围限定：不匹配 Element Plus 内部 input（避免覆盖 vendor CSS 的 padding/height） */
.form-group > select,
.form-group > input,
.form-group > input[type="text"],
.form-group > input[type="number"],
.form-group > input[type="date"] {
    width: 100%;
    padding: 0.45rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    background-color: var(--background);
    color: var(--text);
    font-family: var(--font);
    height: 38px;
    line-height: 1.5;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group > select:focus,
.form-group > input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary);
}

/* select 箭头 */
.form-group select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23555867' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.6rem center;
    background-size: 16px;
    padding-right: 2rem;
}

/* 图表容器 */
.chart-container { width: 100%; height: 400px; }

/* 数据表格 */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.data-table th, .data-table td {
    padding: 0.6rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}
.data-table th {
    background-color: var(--page-bg);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
}
.data-table tr:hover { background-color: var(--row-hover); }

/* 状态类 */
.loading { text-align: center; padding: 2rem; color: var(--text-muted); }
.error {
    text-align: center; padding: 2rem;
    color: var(--danger);
    background-color: #fef0f0;
    border-radius: var(--radius);
    border: 1px solid #fdd;
}
.empty { text-align: center; padding: 2rem; color: var(--text-muted); }
.positive { color: var(--danger); font-weight: 600; }
.negative { color: var(--success); font-weight: 600; }
.neutral { color: var(--text-muted); }

/* 按钮 */
.btn {
    padding: 0.45rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.95rem;
    font-family: var(--font);
    background-color: var(--background);
    color: var(--text);
    transition: all 0.15s;
    height: 38px;
    line-height: 1.4;
}
.btn:hover:not(:disabled) { border-color: var(--text-muted); color: var(--text); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary {
    background-color: var(--primary);
    color: var(--primary-text);
    border-color: var(--primary);
}
.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: var(--primary-text);
}
.btn-danger {
    background-color: var(--background);
    color: var(--danger);
    border-color: var(--border);
}
.btn-danger:hover:not(:disabled) {
    background-color: #fef0f0;
    border-color: var(--danger);
}
.btn-success {
    background-color: var(--success);
    color: var(--primary-text);
    border-color: var(--success);
}
.btn-success:hover:not(:disabled) {
    background-color: #1ea846;
    border-color: #1ea846;
}
.btn-secondary {
    background-color: var(--page-bg);
    color: var(--text);
    border-color: var(--border);
}
.btn-secondary:hover:not(:disabled) {
    background-color: #e6e6e9;
    color: var(--text);
}
.btn-sm {
    padding: 0.2rem 0.55rem;
    font-size: 0.82rem;
    height: 28px;
    line-height: 1.2;
}

/* 标签页 */
.tabs {
    display: flex; gap: 0;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-light);
}
.tab {
    padding: 0.6rem 1.1rem;
    border: none; background: none;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    font-family: var(--font);
    transition: color 0.15s, border-color 0.15s;
}
.tab:hover { color: var(--text); }
.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

/* 提示消息 */
.alert {
    padding: 0.7rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    border-left: 4px solid;
    background-color: var(--page-bg);
}
.alert-info { background-color: #e6f7f8; color: #005f63; border-left-color: var(--info); }
.alert-success { background-color: #e6f9eb; color: #145e2d; border-left-color: var(--success); }
.alert-warning { background-color: #fef7e0; color: #7a5a00; border-left-color: var(--warning); }
.alert-danger { background-color: #fef0f0; color: #a3151b; border-left-color: var(--danger); }

/* 表单行 */
.form-row { display: flex; gap: 1rem; align-items: flex-end; flex-wrap: wrap; }
.form-group { flex: 1; min-width: 0; }
.form-group-btn { flex: 0 0 auto; }

/* 自定义起止日期组：两个 el-date-picker 等分，中间用 ~ 连接 */
.form-group-date-range { display: flex; gap: 0.5rem; align-items: center; }
.form-group-date-range .el-date-editor { flex: 1; min-width: 0; }

textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: var(--font);
    resize: vertical;
    background-color: var(--background);
    color: var(--text);
    min-height: 70px;
    line-height: 1.5;
}
textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 1px var(--primary); }

.hint { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1rem; }
.actions { display: flex; gap: 0.3rem; align-items: center; }
.file-label { display: inline-block; cursor: pointer; line-height: 1.5; }
.action-bar { display: flex; align-items: center; gap: 0.5rem; padding: 0.75rem 1.5rem; }

/* 复选框组 */
.checkbox-group { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }
.checkbox-label { display: flex; align-items: center; gap: 0.35rem; cursor: pointer; font-size: 0.9rem; color: var(--text); }
.checkbox-label input[type="checkbox"] { cursor: pointer; accent-color: var(--primary); width: 16px; height: 16px; }
.checkbox-label span { color: var(--text); }

/* 单选按钮组（horizontal） */
.radio-group { display: flex; gap: 1.2rem; flex-wrap: wrap; align-items: center; padding-top: 0.15rem; }
.radio-label { display: inline-flex; align-items: center; gap: 0.35rem; cursor: pointer; font-size: 0.95rem; color: var(--text); }
.radio-label input[type="radio"] { cursor: pointer; accent-color: var(--primary); width: 16px; height: 16px; }
.radio-label span { color: var(--text); }

input[type="radio"] { accent-color: var(--primary); }

/* 表格滚动容器 */
.table-wrapper { overflow-x: auto; max-height: 500px; overflow-y: auto; }
.table-wrapper .data-table { min-width: 600px; }

/* Streamlit 风格指标卡 */
.metrics-card { display: flex; gap: 1rem; padding: 1rem 0; }
.metric { flex: 1; text-align: center; padding: 0.75rem; border-radius: var(--radius); background: var(--page-bg); }
.metric-label { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.35rem; }
.metric-value { font-size: 1.6rem; font-weight: 600; color: var(--text); }
.metric-value.buy { color: #2ca02c; }
.metric-value.sell { color: #d62728; }

/* 卡片头部行：标题 + 操作按钮 横排 */
.card-header-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }

/* 响应式 */
@media (max-width: 768px) {
    .navbar { flex-direction: column; gap: 0.5rem; padding: 0.75rem 1rem; }
    .nav-links { flex-wrap: wrap; justify-content: center; }
    .container { padding: 0 0.75rem; }
    .chart-container { height: 320px; }
    .form-row { gap: 0.5rem; }
}