/* ============================================================
   合约交易平台 - 全局样式
   ============================================================ */

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #131722;
  --bg-card: #1a1f2e;
  --bg-hover: #232838;
  --border: #2a3040;
  --text-primary: #e1e4ea;
  --text-secondary: #8b92a3;
  --text-muted: #5a6173;
  --green: #26a69a;
  --green-bg: rgba(38, 166, 154, 0.1);
  --red: #ef5350;
  --red-bg: rgba(239, 83, 80, 0.1);
  --blue: #42a5f5;
  --blue-bg: rgba(66, 165, 245, 0.1);
  --yellow: #ffa726;
  --yellow-bg: rgba(255, 167, 38, 0.1);
  --radius: 8px;
}

* { 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-primary);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.sidebar {
  width: 220px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 20px 0;
  flex-shrink: 0;
}

.sidebar-logo {
  padding: 0 20px 20px;
  font-size: 18px;
  font-weight: 700;
  color: var(--blue);
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.sidebar-nav a {
  display: block;
  padding: 10px 20px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s;
}
.sidebar-nav a:hover { background: var(--bg-hover); color: var(--text-primary); }
.sidebar-nav a.active { background: var(--blue-bg); color: var(--blue); border-right: 3px solid var(--blue); }

.main-content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

/* ===== 卡片 ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ===== 表单 ===== */
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-secondary);
  font-size: 13px;
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}
.form-input:focus, .form-select:focus { border-color: var(--blue); }
.form-textarea { resize: vertical; min-height: 80px; }

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: #1e88e5; }
.btn-green { background: var(--green); color: #fff; }
.btn-green:hover { background: #00897b; }
.btn-red { background: var(--red); color: #fff; }
.btn-red:hover { background: #d32f2f; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.btn-outline:hover { background: var(--bg-hover); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* ===== 表格 ===== */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.table th {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
}
.table tr:hover { background: var(--bg-hover); }

/* ===== 订单簿 ===== */
.orderbook-row {
  display: flex;
  justify-content: space-between;
  padding: 4px 12px;
  font-size: 13px;
  font-family: 'SF Mono', Monaco, monospace;
  position: relative;
}
.orderbook-row .bar {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  opacity: 0.08;
}
.orderbook-row.bid .bar { background: var(--green); }
.orderbook-row.ask .bar { background: var(--red); }
.orderbook-row .price { font-weight: 600; z-index: 1; }
.orderbook-row.bid .price { color: var(--green); }
.orderbook-row.ask .price { color: var(--red); }
.orderbook-row .amount { color: var(--text-secondary); z-index: 1; }

/* ===== 标签 ===== */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}
.badge-active { background: var(--green-bg); color: var(--green); }
.badge-ended { background: var(--red-bg); color: var(--red); }
.badge-yes { background: var(--green-bg); color: var(--green); }
.badge-no { background: var(--red-bg); color: var(--red); }
.badge-admin { background: var(--yellow-bg); color: var(--yellow); }

/* ===== 提示 ===== */
.alert {
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 12px;
  font-size: 13px;
}
.alert-info { background: var(--blue-bg); color: var(--blue); border: 1px solid rgba(66,165,245,0.3); }
.alert-error { background: var(--red-bg); color: var(--red); border: 1px solid rgba(239,83,80,0.3); }
.alert-success { background: var(--green-bg); color: var(--green); border: 1px solid rgba(38,166,154,0.3); }
.alert-warning { background: var(--yellow-bg); color: var(--yellow); border: 1px solid rgba(255,167,38,0.3); }

/* ===== 网格 ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.grid-orderbook {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 16px;
}

/* ===== 登录页 ===== */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: var(--bg-primary);
}
.login-box {
  width: 400px;
  max-width: 90vw;
}
.login-box h1 {
  text-align: center;
  margin-bottom: 8px;
  font-size: 24px;
  color: var(--blue);
}
.login-box p {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-size: 13px;
}
.tab-switch {
  display: flex;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--border);
}
.tab-switch button {
  flex: 1;
  padding: 10px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
}
.tab-switch button.active {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

/* ===== 工具类 ===== */
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 12px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex { display: flex; gap: 8px; align-items: center; }
.gap-4 { gap: 16px; }

/* ===== 合约选择器 ===== */
.contract-selector {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
}
.contract-tab {
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
  font-size: 13px;
  transition: all 0.2s;
}
.contract-tab:hover { background: var(--bg-hover); }
.contract-tab.active {
  background: var(--blue-bg);
  border-color: var(--blue);
  color: var(--blue);
}

/* ===== 统计卡片 ===== */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.stat-card .label { color: var(--text-secondary); font-size: 12px; margin-bottom: 8px; }
.stat-card .value { font-size: 24px; font-weight: 700; }

/* ============================================================
   响应式 - 手机适配 (768px 以下)
   ============================================================ */

@media (max-width: 768px) {

  /* 触摸优化 */
  * {
    -webkit-tap-highlight-color: transparent;
  }

  html {
    font-size: 13px;
  }

  /* --- 整体布局：横向 → 纵向 --- */
  .app-layout {
    flex-direction: column;
  }

  /* --- 侧边栏 → 顶部导航条 --- */
  .sidebar {
    width: 100%;
    padding: 0;
    border-right: none;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    flex-shrink: 0;
  }

  .sidebar-logo {
    padding: 0 14px;
    font-size: 15px;
    white-space: nowrap;
    border-bottom: none;
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .sidebar-nav {
    display: flex;
    overflow-x: auto;
    flex: 1;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .sidebar-nav::-webkit-scrollbar { display: none; }

  .sidebar-nav a {
    padding: 12px 14px;
    white-space: nowrap;
    font-size: 13px;
    border-right: none;
  }
  .sidebar-nav a.active {
    border-right: none;
    border-bottom: 2px solid var(--blue);
  }

  /* --- 主内容区 --- */
  .main-content {
    padding: 12px;
  }

  /* --- 顶部信息栏换行 --- */
  .main-content > .flex-between {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .main-content > .flex-between > div {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 12px;
    font-size: 13px;
  }

  /* --- 卡片间距缩小 --- */
  .card {
    padding: 14px;
    margin-bottom: 12px;
  }
  .card-title {
    font-size: 14px;
    margin-bottom: 12px;
    padding-bottom: 10px;
  }

  /* --- 网格全部变单列 --- */
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .grid-orderbook {
    grid-template-columns: 1fr;
  }

  /* --- 统计卡片 2 列 --- */
  #section-dashboard .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
  .stat-card { padding: 12px; }
  .stat-card .value { font-size: 20px; }

  /* --- 表单 --- */
  .form-input, .form-select, .form-textarea {
    padding: 12px;
    font-size: 16px; /* iOS 防止自动缩放 */
  }

  /* --- 按钮：更大触摸区 --- */
  .btn {
    padding: 12px 20px;
    font-size: 14px;
  }
  .btn-sm {
    padding: 10px 14px;
    font-size: 13px;
  }

  /* --- 下单 tab 按钮 --- */
  .tab-switch button {
    padding: 12px 8px;
    font-size: 13px;
  }

  /* --- 订单簿 --- */
  .orderbook-row {
    padding: 5px 10px;
    font-size: 13px;
  }

  /* --- 合约选择器 --- */
  .contract-tab {
    padding: 10px 14px;
    font-size: 13px;
  }

  /* --- 表格：横向滚动 --- */
  .table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }
  .table thead, .table tbody {
    display: table;
    width: max-content;
  }

  /* --- 登录页 --- */
  .login-box {
    width: 100%;
    max-width: 380px;
    padding: 0 16px;
  }
  .login-box h1 { font-size: 20px; }

  /* --- 平仓区域 --- */
  #unwind-area .flex {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  #unwind-area .flex > div { width: 100%; }
  #unwind-area .flex > button { width: 100%; }

  /* --- 管理后台结束合约弹窗 --- */
  #end-contract-modal .card {
    width: 100% !important;
    max-width: 380px;
    margin: 0 12px;
  }
  #end-contract-modal .flex {
    flex-direction: column;
  }
  #end-contract-modal .flex > button {
    flex: none;
    width: 100%;
  }

  /* --- 持仓/订单 flex 布局 --- */
  .positions-list .flex,
  #my-position .flex {
    flex-wrap: wrap;
    gap: 6px 16px;
  }

} /* end @media (max-width: 768px) */

/* ============================================================
   超小屏适配 (380px 以下，如 iPhone SE)
   ============================================================ */
@media (max-width: 380px) {
  html { font-size: 12px; }
  .main-content { padding: 10px; }
  .card { padding: 12px; }
  .sidebar-logo { font-size: 14px; padding: 0 10px; }
  .sidebar-nav a { padding: 10px 10px; font-size: 12px; }
  .stat-card .value { font-size: 18px; }
  .login-box h1 { font-size: 18px; }
}

/* ============================================================
   平板适配 (769px ~ 1024px)
   ============================================================ */
@media (min-width: 769px) and (max-width: 1024px) {
  .grid-orderbook {
    grid-template-columns: 1fr 300px;
  }
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
}