:root {
  --bg: #0c0e12;
  --bg-elevated: #12161d;
  --panel: #181d26;
  --panel-hover: #1e2430;
  --text: #e6edf3;
  --muted: #8b949e;
  --border: #30363d;
  --border-soft: #21262d;
  --green: #3fb950;
  --red: #f85149;
  --accent: #539bf5;
  --accent-dim: #1f3a5f;
  --radius: 10px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  --font: "Segoe UI", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
  /* 内容区最大宽度：比 1080p 下常见的 1280 略宽，带鱼屏两侧留白不拉伸 */
  --layout-max: 1520px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}

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

/* —— 顶栏 —— */
.app-shell {
  width: 100%;
  max-width: var(--layout-max);
  margin-left: auto;
  margin-right: auto;
  padding: 0 24px 48px;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.brand {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
}
.brand span {
  color: var(--muted);
  font-weight: 400;
  margin-left: 8px;
}

.top-nav {
  display: flex;
  gap: 6px;
  background: var(--bg-elevated);
  padding: 4px;
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
}

.top-nav a {
  padding: 8px 18px;
  border-radius: 7px;
  text-decoration: none;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.top-nav a:hover {
  color: var(--text);
  background: var(--panel-hover);
  text-decoration: none;
}

.top-nav a.active {
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

/* —— 页面 —— */
.page.hidden {
  display: none;
}

.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin: 20px 0 16px;
  flex-wrap: wrap;
}

.page-head h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.hint-box {
  margin-bottom: 16px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  overflow: hidden;
}

.hint-box summary {
  padding: 10px 14px;
  cursor: pointer;
  font-size: 13px;
  color: var(--muted);
  user-select: none;
  list-style: none;
}
.hint-box summary::-webkit-details-marker {
  display: none;
}
.hint-box summary::before {
  content: "▸ ";
  color: var(--accent);
}
.hint-box[open] summary::before {
  content: "▾ ";
}

.hint-box .hint-body {
  padding: 0 14px 12px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
  border-top: 1px solid var(--border-soft);
}
.hint-box .hint-body code {
  font-family: var(--mono);
  font-size: 11px;
  background: var(--panel);
  padding: 1px 5px;
  border-radius: 4px;
  color: #b8c4ff;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  padding: 12px 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.toolbar-spacer {
  flex: 1;
  min-width: 8px;
}

.toolbar-meta {
  font-size: 12px;
  color: var(--muted);
  font-family: var(--mono);
}

/* —— 按钮 —— */
button,
.btn {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: border-color 0.15s, background 0.15s;
}

button:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--panel-hover);
}

button.primary {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: #fff;
}

button.danger {
  border-color: rgba(248, 81, 73, 0.5);
  color: var(--red);
  background: rgba(248, 81, 73, 0.08);
}

button.danger:hover:not(:disabled) {
  background: rgba(248, 81, 73, 0.15);
  border-color: var(--red);
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-link {
  background: transparent;
  border: none;
  color: var(--accent);
  padding: 6px 10px;
  font-size: 12px;
}
.btn-link:hover {
  background: var(--accent-dim);
  text-decoration: none;
}

.chk-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
}

/* —— 卡片 —— */
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: border-color 0.2s;
}

.card:hover {
  border-color: #3d444d;
}

.card-head {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, transparent 100%);
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 4px;
}

.card-sub {
  font-size: 11px;
  color: var(--muted);
  font-family: var(--mono);
  word-break: break-all;
}

.card-actions {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-shrink: 0;
}

.card-body {
  padding: 14px 16px;
}

/* 固定内容宽度内三列，卡片不被拉宽 */
.grid-monitor {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.settings-grid-wrap {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

@media (max-width: 1200px) {
  .grid-monitor {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 监控统计 */
.stat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

.stat-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 10px 12px;
}

.stat-label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.stat-value {
  font-size: 18px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.section-title {
  font-size: 11px;
  font-weight: 600;
  color: #b8c4ff;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 14px 0 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-soft);
}

.section-title:first-child {
  margin-top: 0;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.data-table th {
  color: var(--muted);
  font-weight: 500;
  font-size: 11px;
  padding: 6px 8px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 8px;
  border-bottom: 1px solid var(--border-soft);
  font-variant-numeric: tabular-nums;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.list-line {
  font-size: 12px;
  color: var(--muted);
  padding: 6px 0;
  border-bottom: 1px dashed var(--border-soft);
  line-height: 1.45;
}
.list-line:last-child {
  border-bottom: none;
}

.empty-hint {
  font-size: 12px;
  color: var(--muted);
  padding: 8px 0;
}

.pnl-pos {
  color: var(--green);
}
.pnl-neg {
  color: var(--red);
}
.err {
  color: var(--red);
  font-size: 13px;
}

.badge {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent-dim);
  color: #8fc8ff;
  border: 1px solid rgba(83, 155, 245, 0.35);
  white-space: nowrap;
}

/* —— 下单区 —— */
.trade-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
  padding: 14px 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.trade-bar label {
  font-size: 12px;
  color: var(--muted);
  margin-right: 6px;
}

.trade-bar select {
  min-width: 220px;
}

.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  padding: 4px;
  background: var(--bg-elevated);
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  width: fit-content;
  max-width: 100%;
  flex-wrap: wrap;
}

.tabs button {
  border: none;
  background: transparent;
  padding: 8px 16px;
  border-radius: 7px;
}

.tabs button.active {
  background: var(--panel);
  color: var(--accent);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
}

.trade-meta {
  font-size: 12px;
  color: var(--muted);
  padding: 10px 14px;
  background: var(--bg-elevated);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 16px;
  line-height: 1.55;
}

.form-panel.hidden {
  display: none;
}

.form-panel .card-head strong {
  font-size: 14px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  align-items: end;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.field label {
  font-size: 11px;
  color: var(--muted);
  font-weight: 500;
}

.field-wide {
  grid-column: 1 / -1;
}

.field input,
.field select,
.trade-bar select,
.form-row input,
.form-row select {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 11px;
  font-size: 13px;
  width: 100%;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(83, 155, 245, 0.2);
}

.field-check {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  padding-top: 20px;
}

.field-check label {
  font-size: 13px;
  color: var(--text);
  cursor: pointer;
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  justify-content: flex-end;
  padding-top: 4px;
}

/* —— 系统设置 —— */
.settings-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.settings-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.settings-card-head .ex-name {
  flex: 1;
  min-width: 160px;
  font-size: 15px;
  font-weight: 600;
  background: transparent;
  border: none;
  border-bottom: 1px dashed var(--border);
  color: var(--text);
  padding: 4px 0;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.settings-grid .field input {
  font-family: var(--mono);
  font-size: 12px;
}

.cap-chips {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding: 8px 0;
}

.cap-chips label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text);
  cursor: pointer;
  padding: 6px 12px;
  background: var(--bg-elevated);
  border-radius: 999px;
  border: 1px solid var(--border-soft);
}

.settings-card-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-soft);
}

.settings-card-foot .field {
  max-width: 80px;
}

#toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  max-width: min(420px, 92vw);
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: var(--radius);
  display: none;
  z-index: 50;
  white-space: pre-wrap;
  font-size: 13px;
  box-shadow: var(--shadow);
}

#toast.show {
  display: block;
}

@media (max-width: 720px) {
  .app-shell {
    padding: 0 12px 32px;
  }
  .grid-monitor {
    grid-template-columns: 1fr;
  }
  .settings-grid-wrap {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
}