:root {
  --bg-primary: #0f1923;
  --bg-secondary: #1a2736;
  --bg-card: #1e3044;
  --border: #2a4058;
  --text-primary: #e8edf2;
  --text-secondary: #8899aa;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --green: #10b981;
  --red: #ef4444;
  --yellow: #f59e0b;
}

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

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

.app { display: flex; min-height: 100vh; }

/* ===== 侧边栏（桌面） ===== */
.sidebar {
  width: 220px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 20px 0;
  flex-shrink: 0;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-logo {
  padding: 0 20px 20px;
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  margin-bottom: 10px;
}

.sidebar-logo span { color: var(--text-primary); }

.nav-item {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
}
.nav-item:hover { background: var(--bg-card); color: var(--text-primary); }
.nav-item.active { color: var(--accent); background: var(--bg-card); border-left: 3px solid var(--accent); }
.nav-item .icon { margin-right: 10px; font-size: 16px; }

/* ===== 主内容 ===== */
.main { flex: 1; padding: 24px; overflow-y: auto; margin-left: 220px; }

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-title { font-size: 22px; font-weight: 600; }

/* ===== 统计卡片 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.stat-label { font-size: 11px; color: var(--text-secondary); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
.stat-value { font-size: 20px; font-weight: 700; }
.stat-value.positive { color: var(--green); }
.stat-value.negative { color: var(--red); }

/* ===== 策略胜率统计 ===== */
#trade-stats {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}
#trade-stats h3 { font-size: 14px; color: var(--text-secondary); }
#trade-stats .stats-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 0;
}
#trade-stats .stat-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
#trade-stats .stat-item .stat-label {
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0;
  min-width: 80px;
}
#trade-stats .stat-item b { color: var(--text-primary); }

/* ===== 风险收益统计 ===== */
.risk-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 12px;
}
.risk-stat {
  text-align: center;
  padding: 8px;
  background: var(--bg-secondary);
  border-radius: 6px;
  border: 1px solid var(--border);
}
.risk-label { display: block; font-size: 10px; color: var(--text-secondary); margin-bottom: 4px; text-transform: uppercase; }
.risk-value { display: block; font-size: 16px; font-weight: 700; }
.strategy-rate-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.strategy-rate-item {
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 4px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 12px;
}
.strategy-rate-item .strategy-name {
  font-weight: 700;
  color: var(--accent);
  min-width: 70px;
}
@media (max-width: 768px) {
  .risk-stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ===== 表格 ===== */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 24px;
}

.table-header {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

table { width: 100%; border-collapse: collapse; min-width: 600px; }
th { padding: 10px 12px; text-align: left; font-size: 11px; color: var(--text-secondary); text-transform: uppercase; border-bottom: 1px solid var(--border); background: var(--bg-secondary); white-space: nowrap; }
td { padding: 10px 12px; font-size: 13px; border-bottom: 1px solid var(--border); white-space: nowrap; }
tr:hover td { background: rgba(59, 130, 246, 0.05); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}
.badge-buy { background: rgba(16, 185, 129, 0.15); color: var(--green); }
.badge-sell { background: rgba(239, 68, 68, 0.15); color: var(--red); }
.badge-active { background: rgba(16, 185, 129, 0.15); color: var(--green); }
.badge-paused { background: rgba(245, 158, 11, 0.15); color: var(--yellow); }

/* ===== 按钮 ===== */
.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: var(--red); color: white; }
.btn-danger:hover { background: #dc2626; }
.btn-success { background: var(--green); color: white; }
.btn-success:hover { background: #059669; }

/* ===== 状态指示器 ===== */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
}
.status-dot.running { background: var(--green); animation: pulse 2s infinite; }
.status-dot.stopped { background: var(--red); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ===== 配置项 ===== */
.config-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

.config-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.config-section h3 { font-size: 14px; margin-bottom: 12px; color: var(--accent); }
.config-item { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px solid var(--border); }
.config-item:last-child { border-bottom: none; }
.config-key { color: var(--text-secondary); font-size: 12px; }
.config-val { font-size: 12px; font-weight: 500; }

/* ===== 空状态 ===== */
.empty-state { text-align: center; padding: 40px; color: var(--text-secondary); }

/* ===== 刷新按钮 ===== */
.refresh-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
}
.refresh-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ===== 隐藏页面 ===== */
.page { display: none; }
.page.active { display: block; }

/* ===== 登录页 ===== */
.login-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: var(--bg-primary);
  padding: 20px;
}

.login-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 24px;
  width: 380px;
  max-width: 100%;
  text-align: center;
}

.login-logo { font-size: 28px; font-weight: 700; color: var(--accent); margin-bottom: 8px; }
.login-logo span { color: var(--text-primary); }
.login-subtitle { color: var(--text-secondary); font-size: 14px; margin-bottom: 24px; }

.login-input {
  width: 100%;
  padding: 12px 16px;
  margin-bottom: 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 16px; /* 防止iOS缩放 */
  outline: none;
  transition: border-color 0.2s;
}
.login-input:focus { border-color: var(--accent); }

.login-btn {
  width: 100%;
  padding: 12px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.login-btn:hover { background: var(--accent-hover); }

.login-error {
  margin-top: 12px;
  color: var(--red);
  font-size: 13px;
  padding: 8px;
  background: rgba(239, 68, 68, 0.1);
  border-radius: 6px;
}

/* ===== 移动端底部导航 ===== */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  z-index: 100;
  padding: 4px 0 env(safe-area-inset-bottom, 4px);
}

.mobile-nav-inner {
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 8px;
  color: var(--text-secondary);
  font-size: 10px;
  cursor: pointer;
  transition: color 0.2s;
  -webkit-tap-highlight-color: transparent;
}

.mobile-nav-item .m-icon { font-size: 20px; margin-bottom: 2px; }
.mobile-nav-item.active { color: var(--accent); }

/* ===== 移动端响应式 ===== */
@media (max-width: 768px) {
  /* 隐藏桌面侧边栏 */
  .sidebar { display: none; }

  /* 显示底部导航 */
  .mobile-nav { display: block; }

  /* 主内容全宽 */
  .main {
    margin-left: 0;
    padding: 16px 12px 80px 12px;
  }

  /* 统计卡片2列 */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .stat-card { padding: 12px; }
  .stat-label { font-size: 10px; margin-bottom: 4px; }
  .stat-value { font-size: 16px; }

  .page-title { font-size: 18px; }
  .page-header { margin-bottom: 16px; }

  /* 配置网格单列 */
  .config-grid { grid-template-columns: 1fr; }
  .config-section { padding: 12px; }

  /* 登录卡片 */
  .login-card { padding: 24px 16px; }
}

@media (max-width: 400px) {
  /* 超小屏幕统计卡片也2列但更紧凑 */
  .stats-grid { gap: 6px; }
  .stat-card { padding: 10px; }
  .stat-value { font-size: 14px; }
  .main { padding: 12px 8px 80px 8px; }
}