:root {
  --bg: #1a1a2e;
  --bg-card: #16213e;
  --bg-input: #0f3460;
  --text: #eee;
  --text-secondary: #aaa;
  --primary: #e94560;
  --primary-hover: #ff6b81;
  --blue: #4a9eff;
  --green: #00d4aa;
  --orange: #ff9f43;
  --purple: #a855f7;
  --border: #2a3a5c;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.3);
}

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

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

a { color: var(--primary); text-decoration: none; }

/* Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  background: var(--bg-card);
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  border-right: 1px solid var(--border);
}

.sidebar-logo {
  padding: 0 20px 20px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.sidebar-logo span {
  font-size: 12px;
  color: var(--text-secondary);
  display: block;
  font-weight: 400;
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 14px;
  transition: all 0.2s;
}

.sidebar-link:hover {
  background: rgba(255,255,255,0.05);
  color: var(--text);
}

.sidebar-link.active {
  background: var(--primary);
  color: #fff;
}

.sidebar-icon { font-size: 18px; }

.main-content {
  margin-left: 220px;
  flex: 1;
  padding: 24px;
  min-width: 0;
}

/* 移动端汉堡菜单 */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  z-index: 99;
  align-items: center;
  padding: 0 16px;
}

.menu-btn {
  background: none;
  border: none;
  color: var(--text);
  font-size: 22px;
  cursor: pointer;
  padding: 4px 8px;
}

.mobile-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  margin-left: 8px;
}

.overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6);
  z-index: 99;
}

/* Card */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}

/* Grid */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

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

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Chart container */
.chart-box {
  width: 100%;
  height: 300px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 500;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); }

.btn-secondary {
  background: var(--bg-input);
  color: var(--text);
}
.btn-secondary:hover { background: #1a4a8a; }

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.btn-sm { padding: 4px 10px; font-size: 12px; }

/* Form */
.input {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-input);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}
.input:focus { border-color: var(--primary); }

.select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-input);
  color: var(--text);
  font-size: 14px;
  outline: none;
  cursor: pointer;
}

/* Flex utilities */
.flex-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.flex-between { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.mb-16 { margin-bottom: 16px; }
.mb-20 { margin-bottom: 20px; }
.mt-16 { margin-top: 16px; }

/* Grid 2 col */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Number ball */
.ball {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin: 0 4px;
}

.ball-sm {
  width: 28px;
  height: 28px;
  font-size: 13px;
}

.ball-red { background: var(--primary); }
.ball-blue { background: var(--blue); }
.ball-green { background: var(--green); }
.ball-orange { background: var(--orange); }
.ball-purple { background: var(--purple); }

/* Table */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th, td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

tr:hover td { background: rgba(255,255,255,0.02); }

/* Tag */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}
.tag-red { background: rgba(233,69,96,0.2); color: var(--primary); }
.tag-blue { background: rgba(74,158,255,0.2); color: var(--blue); }
.tag-green { background: rgba(0,212,170,0.2); color: var(--green); }
.tag-orange { background: rgba(255,159,67,0.2); color: var(--orange); }

/* Page header */
.page-header {
  margin-bottom: 24px;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
}

.page-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Tooltip */
.tooltip {
  position: relative;
  cursor: help;
}

/* Filter bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
  align-items: center;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state h3 { margin-bottom: 8px; color: var(--text); }

/* Number pick result */
.num-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 20px;
}

/* Result card */
.result-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
    padding: 16px;
    padding-top: 60px;
  }
  .mobile-header { display: flex; }
  .overlay.open { display: block; }
  .grid-2 { grid-template-columns: 1fr; }
  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ball { width: 32px; height: 32px; font-size: 15px; }
}