/* ============================================
   我的量化选股平台 — 样式
   设计语言: 深色专业金融风
   ============================================ */

:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d2b;
  --bg-card: #212438;
  --bg-hover: #2a2f45;
  --bg-input: #161925;
  --border: #2d3248;
  --border-light: #3a3f55;
  --text-primary: #e8eaed;
  --text-secondary: #9aa0b0;
  --text-muted: #6b7280;
  --accent-green: #00c853;
  --accent-green-bg: rgba(0,200,83,0.12);
  --accent-red: #ff5252;
  --accent-red-bg: rgba(255,82,82,0.12);
  --accent-blue: #448aff;
  --accent-blue-bg: rgba(68,138,255,0.12);
  --accent-orange: #ffab00;
  --accent-purple: #7c4dff;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition: 0.2s ease;
}

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

body {
  font-family: var(--font);
  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;
  background: rgba(15,17,23,0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-icon { font-size: 22px; }
.brand-text {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.brand-badge {
  font-size: 11px;
  background: var(--accent-blue-bg);
  color: var(--accent-blue);
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 500;
}
.nav-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.status-dot.trading { background: var(--accent-green); box-shadow: 0 0 6px var(--accent-green); }
.status-dot.closed { background: var(--accent-red); box-shadow: 0 0 6px var(--accent-red); }
.status-dot.weekend { background: var(--accent-orange); box-shadow: 0 0 6px var(--accent-orange); }
.status-time { color: var(--text-muted); font-size: 12px; }

/* ── 容器 ──────────────────────────────── */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

/* ── 策略横幅 ──────────────────────────── */
.strategy-banner {
  background: linear-gradient(135deg, #1a2332 0%, #212438 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
}
.banner-content { margin-bottom: 14px; }
.banner-content h2 {
  font-size: 18px;
  margin-bottom: 4px;
}
.banner-content p {
  font-size: 13px;
  color: var(--text-secondary);
}
.banner-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.step-chip {
  font-size: 12px;
  background: var(--bg-hover);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 4px 12px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
}
.step-chip span { color: var(--accent-blue); }

/* ── 参数面板 ──────────────────────────── */
.params-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 20px;
}
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.panel-header h3 { font-size: 14px; color: var(--text-secondary); }
.params-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
}
.param-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.param-item label {
  font-size: 12px;
  color: var(--text-muted);
}
.param-item input {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  color: var(--text-primary);
  font-size: 13px;
  font-family: var(--font);
  width: 100%;
  outline: none;
  transition: border-color var(--transition);
}
.param-item input:focus { border-color: var(--accent-blue); }
.param-item .param-desc {
  font-size: 11px;
  color: var(--text-muted);
}

/* ── 双栏布局 ──────────────────────────── */
.workflow-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}
@media (max-width: 960px) {
  .workflow-grid { grid-template-columns: 1fr; }
}

/* ── 卡片 ──────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.card-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.card-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.card-title-row h3 { font-size: 15px; }
.card-body { padding: 16px 20px; }

/* ── 按钮 ──────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  border: none;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}
.btn-primary {
  background: var(--accent-blue);
  color: #fff;
}
.btn-primary:hover { background: #5a9aff; }
.btn-secondary {
  background: var(--accent-green);
  color: #fff;
}
.btn-secondary:hover { opacity: 0.9; }
.btn-sm {
  padding: 4px 12px;
  font-size: 12px;
  background: var(--bg-hover);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font);
}
.btn-sm:hover { background: var(--border); }
.btn-full { width: 100%; justify-content: center; padding: 10px; margin-top: 12px; }
.btn-icon { font-size: 12px; }
.btn-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
}
.btn-close:hover { color: var(--text-primary); }

.badge {
  font-size: 11px;
  padding: 2px 10px;
  border-radius: 20px;
  font-weight: 500;
}
.badge-result {
  background: var(--accent-blue-bg);
  color: var(--accent-blue);
}

/* ── 表格 ──────────────────────────────── */
.table-container {
  overflow-x: auto;
  max-height: 480px;
  overflow-y: auto;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.data-table th {
  text-align: left;
  padding: 8px 10px;
  font-weight: 500;
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg-card);
}
.data-table td {
  padding: 8px 10px;
  border-bottom: 1px solid rgba(45,50,72,0.4);
  white-space: nowrap;
}
.data-table tbody tr:hover { background: var(--bg-hover); cursor: pointer; }
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr.empty-row:hover { background: transparent; cursor: default; }
.data-table tbody tr.empty-row td {
  text-align: center;
  color: var(--text-muted);
  padding: 30px;
}
.data-table-sm { font-size: 12px; }
.data-table-sm td, .data-table-sm th { padding: 6px 8px; }

.text-green { color: var(--accent-green); }
.text-red { color: var(--accent-red); }
.text-blue { color: var(--accent-blue); }
.text-orange { color: var(--accent-orange); }
.text-muted { color: var(--text-muted); }

/* ── AI 分析弹窗 ─────────────────────────── */
.modal-wide { max-width: 680px; }
.ai-section { margin-bottom: 14px; }
.ai-section-title { font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-secondary); }
.ai-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.ai-item { font-size: 13px; display: flex; gap: 8px; padding: 4px 0; }
.ai-label { color: var(--text-muted); min-width: 70px; flex-shrink: 0; }
.ai-card {
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: border-color var(--transition);
}
.ai-card:hover { border-color: var(--accent-blue); }
.ai-card-header { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.ai-stock-name { font-size: 14px; font-weight: 600; flex: 1; }
.ai-card-body { font-size: 12px; color: var(--text-muted); line-height: 1.5; }
.ai-fallback { font-size: 11px; color: var(--accent-orange); margin-top: 4px; }

/* ── 回测表单 ──────────────────────────── */
.backtest-form { margin-bottom: 16px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 8px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.form-group label {
  font-size: 12px;
  color: var(--text-muted);
}
.form-input {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  color: var(--text-primary);
  font-size: 13px;
  font-family: var(--font);
  outline: none;
  transition: border-color var(--transition);
  width: 100%;
}
.form-input:focus { border-color: var(--accent-blue); }

/* ── 回测统计 ──────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}
.stat-card {
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
}
.stat-val {
  display: block;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
}
.stat-lbl {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}
.stat-signals .stat-val { color: var(--accent-blue); }
.stat-winrate .stat-val { color: var(--accent-green); }
.stat-avgprofit .stat-val { color: var(--accent-orange); }
.stat-totalreturn .stat-val { color: var(--accent-green); }
.stat-maxprofit .stat-val { color: var(--accent-green); }
.stat-drawdown .stat-val { color: var(--accent-red); }

.section-bar {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 13px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}
.trade-count { color: var(--text-muted); font-size: 12px; }

/* ── 加载状态 ──────────────────────────── */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 30px;
  color: var(--text-muted);
  font-size: 14px;
}
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hidden { display: none !important; }

/* ── 弹窗 ──────────────────────────────── */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 520px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 15px; }
.modal-body { padding: 16px 20px; }

.detail-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(45,50,72,0.3);
  font-size: 13px;
}
.detail-step:last-child { border-bottom: none; }
.detail-step .step-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
}
.detail-step .step-num.pass { background: var(--accent-green-bg); color: var(--accent-green); }
.detail-step .step-num.fail { background: var(--accent-red-bg); color: var(--accent-red); }
.detail-step .step-desc { flex: 1; }
.detail-step .step-price { color: var(--text-muted); font-size: 12px; }

/* ── 底部 ──────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 16px 24px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* ── 滚动条 ────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }