/**
 * style.css — LTV预估系统全部样式
 *
 * 结构：
 *   1. CSS变量 / Reset
 *   2. Header / Layout / Sidebar
 *   3. 内容区 / 面板 / 卡片
 *   4. 上传区域 / 校验徽章
 *   5. 按钮 / 表单
 *   6. 参数卡片 / 图表
 *   7. 预测结果 / Banner
 *   8. ROI 计算器
 *   9. CSV / 多组对比
 *  10. 响应式
 */

/* =========== 1. CSS变量 / Reset =========== */
:root {
    --primary: #4F46E5; --primary-light: #818CF8; --primary-dark: #3730A3; --primary-bg: #EEF2FF;
    --success: #10B981; --success-bg: #ECFDF5;
    --warning: #F59E0B; --warning-bg: #FFFBEB;
    --danger: #EF4444; --danger-bg: #FEF2F2;
    --bg: #F1F5F9; --card: #FFFFFF; --text: #1E293B; --text-muted: #64748B; --border: #E2E8F0;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
    --radius: 10px; --radius-sm: 6px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg); color: var(--text); line-height: 1.6; min-height: 100vh;
}

/* =========== 2. Header / Layout / Sidebar =========== */
.app-header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    color: white; padding: 18px 32px; display: flex; align-items: center; justify-content: space-between;
    box-shadow: 0 2px 8px rgba(79,70,229,0.3); position: sticky; top: 0; z-index: 100;
}
.app-header h1 { font-size: 20px; font-weight: 700; }
.app-header .subtitle { font-size: 13px; opacity: 0.85; margin-top: 2px; }
.header-formula {
    font-family: Georgia, serif; font-size: 15px; background: rgba(255,255,255,0.15);
    padding: 6px 16px; border-radius: 20px; font-style: italic; letter-spacing: 1px;
}
.app-layout { display: flex; min-height: calc(100vh - 64px); }
.sidebar {
    width: 196px; background: var(--card); border-right: 1px solid var(--border);
    padding: 16px 0; flex-shrink: 0;
}
.nav-item {
    display: flex; align-items: center; gap: 12px; padding: 14px 20px; cursor: pointer;
    transition: all 0.2s; border-left: 3px solid transparent; color: var(--text-muted);
    font-size: 14px; user-select: none;
}
.nav-item:hover { background: var(--bg); color: var(--text); }
.nav-item.active { background: var(--primary-bg); border-left-color: var(--primary); color: var(--primary); font-weight: 600; }
.nav-item.done { color: var(--success); }
.nav-item.done .step-num { background: var(--success); }
.step-num {
    width: 26px; height: 26px; border-radius: 50%; background: var(--border); color: white;
    display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; flex-shrink: 0;
}
.nav-item.active .step-num { background: var(--primary); }
.step-label small { font-weight: 400; color: var(--text-muted); font-size: 11px; }

/* =========== 3. 内容区 / 面板 / 卡片 =========== */
.content { flex: 1; padding: 28px 32px; max-width: 1100px; overflow-y: auto; }
.step-panel { display: none; }
.step-panel.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.panel-header { margin-bottom: 24px; }
.panel-header h2 { font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.panel-header p { color: var(--text-muted); font-size: 14px; }
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; margin-bottom: 20px; }
.card-title {
    font-size: 15px; font-weight: 600; margin-bottom: 16px;
    display: flex; align-items: center; gap: 8px;
}
.card-title .dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.info-box {
    background: var(--primary-bg); border-left: 3px solid var(--primary);
    padding: 12px 16px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 13px; color: var(--primary-dark); margin-bottom: 16px;
}
.info-box.warn { background: var(--warning-bg); border-left-color: var(--warning); color: #92400E; }
.info-box.err { background: var(--danger-bg); border-left-color: var(--danger); color: #991B1B; }
.info-box.ok { background: var(--success-bg); border-left-color: var(--success); color: #065F46; }

/* =========== 4. 上传区域 / 校验徽章 =========== */
.upload-zone {
    border: 2px dashed var(--border); border-radius: var(--radius); padding: 40px 24px;
    text-align: center; transition: all 0.2s; cursor: pointer; position: relative;
}
.upload-zone:hover, .upload-zone.dragover { border-color: var(--primary-light); background: var(--primary-bg); }
.upload-zone .icon { font-size: 36px; margin-bottom: 8px; }
.upload-zone .text { font-size: 14px; color: var(--text-muted); margin-bottom: 12px; }
.upload-zone .hint { font-size: 12px; color: #94A3B8; margin-top: 8px; }
.upload-zone input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.upload-zone.has-file { border-color: var(--success); border-style: solid; background: var(--success-bg); padding: 20px 24px; }
.upload-zone.has-file .icon { font-size: 24px; }
.file-name { font-weight: 600; color: var(--success); font-size: 15px; }
.sheet-checks { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.sheet-badge {
    display: inline-flex; align-items: center; gap: 4px; padding: 4px 10px;
    border-radius: 20px; font-size: 12px; font-weight: 500;
}
.sheet-badge.found { background: var(--success-bg); color: var(--success); }
.sheet-badge.missing { background: var(--danger-bg); color: var(--danger); }
.sheet-badge .ico { font-size: 11px; }
.data-summary {
    display: flex; flex-wrap: wrap; gap: 16px; margin: 12px 0; font-size: 13px; color: var(--text-muted);
}
.data-summary span { display: flex; align-items: center; gap: 4px; }

/* =========== 5. 按钮 / 表单 =========== */
.btn {
    padding: 8px 18px; border-radius: var(--radius-sm); font-size: 13px; font-weight: 500;
    cursor: pointer; transition: all 0.2s; border: 1px solid var(--border); background: white; color: var(--text);
    display: inline-flex; align-items: center; gap: 6px;
}
.btn:hover { background: var(--bg); }
.btn-primary { background: var(--primary); color: white; border-color: var(--primary); font-weight: 600; padding: 10px 28px; font-size: 14px; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-success { background: var(--success); color: white; border-color: var(--success); }
.btn-success:hover { background: #059669; }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-group { margin-top: 16px; display: flex; gap: 12px; align-items: center; }
.result-area { margin-top: 24px; }
.hidden { display: none !important; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; }
.form-input {
    width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
    font-size: 14px; transition: border-color 0.2s;
}
.form-input:focus { outline: none; border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }

/* =========== 6. 参数卡片 / 图表 / 表格 =========== */
.param-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 16px; }
.param-card { background: var(--bg); border-radius: var(--radius-sm); padding: 16px; text-align: center; }
.param-card label { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 4px; font-weight: 500; }
.param-card .value { font-size: 22px; font-weight: 700; color: var(--primary); }
.param-card .value.success { color: var(--success); }
.param-card .value.warning { color: var(--warning); }
.param-card .value.danger { color: var(--danger); }
.chart-box { background: var(--card); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); margin-top: 20px; }
.chart-box canvas { max-height: 360px; }
.compare-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.compare-table th { background: var(--bg); padding: 10px 14px; text-align: left; font-weight: 600; font-size: 12px; color: var(--text-muted); }
.compare-table td { padding: 10px 14px; border-top: 1px solid var(--border); }
.compare-table tr:hover { background: #F8FAFF; }
.compare-table .highlight { background: var(--primary-bg); font-weight: 600; }

/* =========== 7. 预测结果 / Banner =========== */
.result-banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white; padding: 24px 28px; border-radius: var(--radius); margin-bottom: 20px;
}
.banner-stats {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 16px;
}
.banner-stat { text-align: center; }
.banner-stat .stat-label { font-size: 12px; opacity: 0.8; margin-bottom: 2px; }
.banner-stat .stat-value { font-size: 28px; font-weight: 800; }
.banner-stat .stat-sub { font-size: 11px; opacity: 0.7; margin-top: 2px; }

.biz-table th { white-space: nowrap; }
.biz-table td { white-space: nowrap; font-size: 13px; }
.biz-table .row-ok { }
.biz-table .row-warn { background: #fffbeb; }
.biz-table .row-err { background: #fef2f2; }
.biz-status { display: inline-flex; align-items: center; gap: 4px; padding: 3px 10px; border-radius: 12px; font-size: 11px; font-weight: 600; }
.biz-status.ok { background: var(--success-bg); color: var(--success); }
.biz-status.warn { background: var(--warning-bg); color: #92400E; }
.biz-status.err { background: var(--danger-bg); color: var(--danger); }
.status-tip {
    display: inline-flex; align-items: center; justify-content: center;
    width: 15px; height: 15px; border-radius: 50%; background: rgba(0,0,0,0.12);
    color: #555; font-size: 10px; font-weight: 700; cursor: pointer;
    margin-left: 3px; vertical-align: middle; position: relative;
}
.status-tip .tip-popup {
    display: none; position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%);
    background: var(--text); color: white; font-size: 12px; font-weight: 400;
    padding: 8px 12px; border-radius: 6px; width: 220px; line-height: 1.6;
    box-shadow: var(--shadow-lg); z-index: 50; white-space: normal; text-align: left;
}
.status-tip .tip-popup::after {
    content: ''; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
    border: 6px solid transparent; border-top-color: var(--text);
}
.status-tip.active .tip-popup { display: block; }

.tag { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 600; }
.tag-primary { background: var(--primary-bg); color: var(--primary); }

/* =========== 8. ROI 计算器 =========== */
.roi-calc { background: var(--bg); border-radius: var(--radius-sm); padding: 20px; margin-top: 20px; }
.roi-result { display: flex; gap: 16px; margin-top: 12px; flex-wrap: wrap; }
.roi-item { background: white; padding: 12px 20px; border-radius: var(--radius-sm); box-shadow: var(--shadow); text-align: center; flex: 1; min-width: 120px; }
.roi-item .label { font-size: 12px; color: var(--text-muted); }
.roi-item .val { font-size: 20px; font-weight: 700; margin-top: 4px; }
.roi-positive { color: var(--success); }
.roi-negative { color: var(--danger); }

/* =========== 9. CSV / 多组对比 =========== */
.toggle-csv { font-size: 12px; color: var(--text-muted); cursor: pointer; margin-top: 12px; text-align: center; }
.toggle-csv:hover { color: var(--primary); }
.csv-area { margin-top: 12px; }
textarea.data-input {
    width: 100%; min-height: 140px; border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: 12px 14px; font-family: 'SF Mono','Fira Code','Consolas', monospace; font-size: 13px;
    resize: vertical; color: var(--text); background: #FAFBFC;
}
textarea.data-input:focus { outline: none; border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
.group-card {
    border-left: 3px solid var(--border);
    position: relative;
    transition: border-color 0.2s;
}
.group-header {
    display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px;
}
.group-header-left { display: flex; align-items: center; gap: 10px; }
.group-color-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.group-name-input {
    border: none; border-bottom: 1px solid var(--border); font-size: 15px; font-weight: 600;
    padding: 2px 4px; width: 140px; background: transparent; color: var(--text);
}
.group-name-input:focus { outline: none; border-bottom-color: var(--primary); }
.btn-remove { color: var(--text-muted); border: none; background: none; cursor: pointer; font-size: 18px; padding: 4px 8px; border-radius: 4px; }
.btn-remove:hover { background: var(--danger-bg); color: var(--danger); }
.day-grid-7 {
    display: grid; grid-template-columns: repeat(8, 1fr); gap: 8px;
}
.day-grid-7 .form-group { margin-bottom: 0; }
.day-grid-7 label { font-size: 12px; text-align: center; display: block; margin-bottom: 4px; }
.day-grid-7 .form-input { text-align: center; padding: 8px 4px; font-size: 13px; }
.optional-days { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.optional-days .form-group { margin-bottom: 0; width: 100px; }
.optional-days label { font-size: 12px; }
.optional-days .form-input { text-align: center; padding: 8px 4px; font-size: 13px; }
.group-actions-bar {
    display: flex; gap: 10px; align-items: center; margin-bottom: 20px; flex-wrap: wrap;
}
.compare-highlight-row { background: var(--success-bg); }
.method-tag {
    display: inline-block; padding: 1px 6px; border-radius: 3px; font-size: 11px; font-weight: 500;
}
.method-tag.fix-b { background: var(--primary-bg); color: var(--primary); }
.method-tag.direct { background: var(--warning-bg); color: #92400E; }

/* =========== 10. 管理员/用户模式 =========== */
body:not(.admin-mode) .admin-only { display: none !important; }
body.admin-mode .user-only-panel { display: none !important; }
.admin-badge {
    display: inline-flex; align-items: center; gap: 4px;
    background: rgba(255,255,255,0.2); padding: 4px 12px; border-radius: 12px;
    font-size: 11px; font-weight: 600; letter-spacing: 0.5px;
}
.mode-link {
    font-size: 11px; opacity: 0.7; text-decoration: underline; cursor: pointer; color: white;
    margin-left: 8px;
}
.mode-link:hover { opacity: 1; }

/* =========== 11. 预设选择器 =========== */
.preset-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px;
}
.preset-item {
    position: relative; background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 16px 18px; cursor: pointer;
    transition: all 0.2s; box-shadow: var(--shadow);
}
.preset-item:hover { border-color: var(--primary-light); box-shadow: var(--shadow-lg); transform: translateY(-1px); }
.preset-item-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.preset-name { font-size: 15px; font-weight: 700; color: var(--text); }
.preset-type { font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 4px; background: var(--bg); }
.preset-meta { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.preset-date { font-size: 11px; color: #94A3B8; }
.preset-delete {
    position: absolute; top: 8px; right: 8px; background: none; border: none;
    color: var(--text-muted); cursor: pointer; font-size: 14px; padding: 2px 6px;
    border-radius: 4px; opacity: 0; transition: opacity 0.2s;
}
.preset-item:hover .preset-delete { opacity: 1; }
.preset-delete:hover { background: var(--danger-bg); color: var(--danger); }

/* =========== 12. 保存弹窗 =========== */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 200;
    display: flex; align-items: center; justify-content: center;
    animation: fadeIn 0.2s ease;
}
.modal-box {
    background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow-lg);
    width: 400px; max-width: 90vw; padding: 28px; animation: fadeIn 0.2s ease;
}
.modal-title { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.modal-sub { font-size: 13px; color: var(--text-muted); margin-bottom: 16px; }

/* =========== 13. Toast =========== */
.toast {
    position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(80px);
    background: var(--text); color: white; padding: 10px 24px; border-radius: 8px;
    font-size: 14px; font-weight: 500; box-shadow: var(--shadow-lg);
    opacity: 0; transition: all 0.3s ease; z-index: 300; pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* =========== 14. 折叠详情 =========== */
.detail-collapsible { margin-top: 16px; }
.detail-toggle {
    display: flex; align-items: center; gap: 6px; cursor: pointer; user-select: none;
    font-size: 13px; color: var(--text-muted); padding: 8px 0;
}
.detail-toggle:hover { color: var(--primary); }
.detail-toggle .arrow { transition: transform 0.2s; font-size: 10px; }
.detail-toggle.open .arrow { transform: rotate(90deg); }
.detail-body { overflow: hidden; max-height: 0; transition: max-height 0.3s ease; }
.detail-body.open { max-height: 5000px; }

/* =========== 15. 响应式 =========== */
@media (max-width: 768px) {
    .app-layout { flex-direction: column; }
    .sidebar { width: 100%; display: flex; overflow-x: auto; border-right: none; border-bottom: 1px solid var(--border); padding: 0; }
    .nav-item { border-left: none; border-bottom: 3px solid transparent; white-space: nowrap; padding: 12px 16px; }
    .nav-item.active { border-bottom-color: var(--primary); border-left: none; }
    .content { padding: 20px 16px; }
    .header-formula { display: none; }
    .param-grid { grid-template-columns: repeat(2, 1fr); }
    .day-grid-7 { grid-template-columns: repeat(4, 1fr); }
    .day-grid-7 .form-input { padding: 6px 2px; font-size: 12px; }
}