:root {
  --bg: #0e1116;
  --bg-soft: #151a22;
  --bg-card: #171d26;
  --border: #253040;
  --text: #e6ecf5;
  --muted: #8d9cb3;
  --accent: #f0a020;
  --demo: #ff9f1a;
  --demo-bg: #2a1a00;
  --up: #f6465d;      /* 涨 = 红（中国市场惯例） */
  --down: #2ebd85;    /* 跌 = 绿 */
  --ok: #2ebd85;
  --warn: #f0a020;
  --err: #f6465d;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

/* ---------------- DEMO banner (always visible) ---------------- */
#demo-banner {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  flex-wrap: wrap;   /* 窄屏时换行，避免 nowrap 的 env 徽标把页面撑出横向滚动 */
  align-items: center;
  gap: 8px 12px;
  padding: 10px 18px;
  background: repeating-linear-gradient(45deg, #3a2200, #3a2200 12px, #2b1900 12px, #2b1900 24px);
  border-bottom: 2px solid var(--demo);
  font-size: 13px;
}
.badge-demo {
  flex: 0 0 auto;
  background: var(--demo);
  color: #1a1200;
  font-weight: 800;
  letter-spacing: .5px;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
}
.banner-text { color: #ffd894; }
.banner-text strong { color: #fff; }
.banner-env {
  margin-left: auto;
  font-family: var(--mono);
  color: #ffd894;
  border: 1px solid var(--demo);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 12px;
  white-space: nowrap;
}

/* ---------------- top bar ---------------- */
.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo {
  background: var(--accent);
  color: #14100a;
  font-weight: 900;
  border-radius: 5px;
  padding: 3px 9px;
  font-size: 13px;
}
.topbar h1 { font-size: 16px; margin: 0; font-weight: 650; }
.topbar h1 small { color: var(--muted); font-weight: 400; font-size: 12px; margin-left: 6px; }

.market-picker { display: flex; align-items: center; gap: 8px; }
.market-picker label { color: var(--muted); font-size: 12px; }
select, input[type=text], input[type=password] {
  background: #0b0e13;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 6px 8px;
  font-size: 13px;
  font-family: inherit;
  min-width: 0;
}
select:focus, input:focus { outline: 1px solid var(--accent); border-color: var(--accent); }
#inst-custom { width: 190px; }

.conn { margin-left: auto; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.pill {
  font-size: 11px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 9px;
  white-space: nowrap;
}
.pill b { font-family: var(--mono); font-weight: 600; }
.pill.online { border-color: rgba(46,189,133,.5); color: #9fe8cd; }
.pill.offline { border-color: rgba(246,70,93,.5); color: #ffb3bd; }
.pill.warn { border-color: rgba(240,160,32,.5); color: #ffd894; }

/* ---------------- buttons ---------------- */
.btn {
  border: 1px solid var(--border);
  background: #1d2530;
  color: var(--text);
  border-radius: 5px;
  padding: 6px 12px;
  font-size: 12.5px;
  font-family: inherit;
  cursor: pointer;
}
.btn:hover { border-color: #3a4a60; }
.btn.primary { background: var(--accent); color: #14100a; border-color: var(--accent); font-weight: 700; }
.btn.ghost { background: transparent; }
.btn.danger { border-color: rgba(246,70,93,.5); color: #ffb3bd; background: transparent; }
.btn.demo-btn {
  width: 100%;
  background: var(--demo);
  color: #1a1200;
  font-weight: 800;
  border: none;
  padding: 11px;
  font-size: 14px;
  letter-spacing: .3px;
}
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------------- layout ---------------- */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding: 16px 18px 6px;
  align-items: start;
}
.span-2 { grid-column: span 2; }
@media (max-width: 1080px) {
  .grid { grid-template-columns: minmax(0, 1fr); }
  .span-2 { grid-column: span 1; }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 14px 16px 16px;
  min-width: 0;
}
.card > header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.card h2 { font-size: 14px; margin: 0; font-weight: 650; }
.card h2 small { color: var(--muted); font-weight: 400; }
.card h3 { font-size: 12px; color: var(--muted); margin: 14px 0 6px; font-weight: 600; }
.card header .tag { margin-left: auto; }
.card header .btn { margin-left: auto; }

.tag {
  font-size: 10.5px;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 7px;
  color: var(--muted);
  white-space: nowrap;
}
.tag.demo {
  background: var(--demo);
  color: #1a1200;
  border-color: var(--demo);
  font-weight: 800;
  letter-spacing: .4px;
}

/* ---------------- status grid ---------------- */
.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}
.stat {
  background: #12171e;
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 9px 11px;
}
.stat .k { font-size: 11px; color: var(--muted); }
.stat .v { font-family: var(--mono); font-size: 13.5px; margin-top: 3px; font-weight: 600; }
.v.online, .v.ok { color: var(--ok); }
.v.offline { color: var(--err); }
.v.warn, .v.starting { color: var(--warn); }
.v.demo { color: var(--demo); }

/* ---------------- ticker ---------------- */
.ticker-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}
.tick {
  background: #12171e;
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 8px 10px;
}
.tick .k { font-size: 11px; color: var(--muted); }
.tick .v { font-family: var(--mono); font-size: 15px; font-weight: 650; margin-top: 2px; }
.up { color: var(--up); }
.down { color: var(--down); }

.chart-wrap { background: #0f141a; border: 1px solid var(--border); border-radius: 7px; padding: 6px; margin-bottom: 12px; }
#candle-chart { width: 100%; height: 220px; display: block; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 760px) { .two-col { grid-template-columns: 1fr; } }

.book { font-family: var(--mono); font-size: 12px; }
.book .lvl { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 6px; padding: 2px 4px; border-radius: 3px; }
.book .lvl.head { color: var(--muted); font-size: 11px; }
.book .ask { color: var(--up); }
.book .bid { color: var(--down); }
.book .mid { text-align: center; color: var(--muted); font-size: 12px; margin: 5px 0; border-top: 1px dashed var(--border); border-bottom: 1px dashed var(--border); padding: 3px 0; }

/* ---------------- tables ---------------- */
/* 窄屏上 9 列的订单表无法塞进 390px：让它在卡片内部横向滚动，
   而不是把整个页面撑出横向滚动条。 */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 4px;
}
.table-scroll table.mini { min-width: 460px; }
#trades-table   { min-width: 300px; }
#balance-table  { min-width: 340px; }
#positions-table{ min-width: 430px; }
#pending-table  { min-width: 780px; }
#history-table  { min-width: 660px; }

table.mini { width: 100%; border-collapse: collapse; font-size: 12px; }
table.mini th {
  text-align: left;
  color: var(--muted);
  font-weight: 600;
  font-size: 11px;
  padding: 5px 6px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
table.mini td {
  padding: 5px 6px;
  border-bottom: 1px solid #1d242e;
  font-family: var(--mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}
table.mini tr:hover td { background: #12171e; }
table.mini .empty td { color: var(--muted); font-family: inherit; text-align: center; padding: 12px; }

/* ---------------- forms ---------------- */
#order-form { display: flex; flex-direction: column; gap: 10px; }
#order-form label { display: flex; flex-direction: column; gap: 4px; font-size: 11.5px; color: var(--muted); flex: 1; }
#order-form input, #order-form select { width: 100%; font-family: var(--mono); }
#order-form .row { display: flex; gap: 10px; }
.warn-note {
  background: var(--demo-bg);
  border-left: 3px solid var(--demo);
  color: #ffd894;
  padding: 7px 10px;
  border-radius: 4px;
  font-size: 12px;
  margin: 0 0 10px;
}
.rules { font-size: 11.5px; color: var(--muted); font-family: var(--mono); }
.error { color: #ffb3bd; font-size: 12px; margin: 4px 0 0; }
.ok { color: #9fe8cd; font-size: 12px; margin: 4px 0 0; }
.muted { color: var(--muted); }
.small { font-size: 11.5px; }
.hidden { display: none !important; }

.kv { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 8px; margin-bottom: 10px; }
.kv .item { background: #12171e; border: 1px solid var(--border); border-radius: 6px; padding: 7px 9px; }
.kv .item .k { font-size: 11px; color: var(--muted); }
.kv .item .v { font-family: var(--mono); font-size: 13px; margin-top: 2px; }

/* ---------------- meters ---------------- */
.meters { display: flex; flex-direction: column; gap: 9px; margin-bottom: 12px; }
.meter .head { display: flex; justify-content: space-between; font-size: 11.5px; color: var(--muted); }
.meter .bar { height: 6px; background: #0b0e13; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; margin-top: 3px; }
.meter .fill { height: 100%; background: linear-gradient(90deg, #2ebd85, #f0a020); width: 0%; }

/* ---------------- logs ---------------- */
.loglist { list-style: none; margin: 0; padding: 0; max-height: 240px; overflow-y: auto; font-family: var(--mono); font-size: 11.5px; }
.loglist li { padding: 3px 0; border-bottom: 1px solid #1a2029; color: var(--muted); }
.loglist li .lvl { display: inline-block; width: 52px; }
.loglist li.ERROR .lvl { color: var(--err); }
.loglist li.WARNING .lvl { color: var(--warn); }
.loglist li.INFO .lvl { color: var(--ok); }

/* ---------------- config notice ---------------- */
.notice {
  margin: 12px 18px 0;
  padding: 9px 13px;
  border-radius: 7px;
  background: #241a08;
  border: 1px solid rgba(240, 160, 32, .45);
  border-left: 3px solid var(--accent);
  color: #ffd894;
  font-size: 12.5px;
}
.notice strong { color: #fff; }
.notice.error { background: #2a1015; border-color: rgba(246,70,93,.45); border-left-color: var(--err); color: #ffb3bd; }

/* ---------------- overlay ---------------- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 11, 15, .92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.auth-card { width: 100%; max-width: 380px; display: flex; flex-direction: column; gap: 10px; }
.auth-card h2 { margin: 0; font-size: 16px; }

@media (max-width: 640px) {
  #demo-banner { padding: 9px 12px; }
  .banner-text { flex: 1 1 100%; order: 3; }
  .banner-env { margin-left: auto; }
  .grid { padding: 12px 12px 4px; }
  .topbar { padding: 12px; }
  .footer { padding: 12px 12px 20px; }
}

.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 14px 18px 24px;
  color: var(--muted);
  font-size: 11.5px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
}