:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #182230;
  --muted: #7b8798;
  --border: #e7ebf1;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --green: #15966b;
  --green-bg: #e8f7f0;
  --red: #dc5353;
  --red-bg: #fff0f0;
  --shadow: 0 3px 14px rgba(30, 50, 80, .045);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-size: 14px;
}

button, input, select {
  font: inherit;
}

button { cursor: pointer; }

.hidden { display: none !important; }

.muted { color: var(--muted); }
.small { font-size: 12px; }

.topbar {
  height: 66px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(calc((100vw - 1240px) / 2), 24px);
  gap: 24px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-size: 18px;
  font-weight: 750;
  white-space: nowrap;
}

.brand-icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: #eaf1ff;
  color: var(--primary);
  font-weight: 800;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-btn {
  background: transparent;
  border: 0;
  color: #667386;
  padding: 10px 15px;
  border-radius: 8px;
}

.nav-btn:hover, .nav-btn.active {
  color: var(--primary);
  background: #eff4ff;
}

.top-user {
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 30px 24px 70px;
}

.page { display: none; }
.page.active { display: block; }

.page-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.eyebrow {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: var(--primary);
  margin-bottom: 7px;
}

h1 {
  font-size: 26px;
  margin: 0 0 7px;
  letter-spacing: -.5px;
}

h2 {
  font-size: 16px;
  margin: 0;
}

p { margin: 0; }

.market-picker {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

select, input {
  background: #fff;
  border: 1px solid #dce2eb;
  color: var(--text);
  border-radius: 8px;
  padding: 11px 12px;
  outline: none;
  width: 100%;
  min-width: 0;
}

select:focus, input:focus {
  border-color: #8aabf7;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .08);
}

label {
  display: block;
  color: #667386;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 8px;
}

label input, label select {
  display: block;
  margin-top: 7px;
}

.btn {
  border: 0;
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 650;
  transition: .15s ease;
}

.btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover { background: var(--primary-dark); }

.btn-light {
  background: #f0f3f8;
  color: #526176;
}

.btn-light:hover { background: #e6ebf3; }

.btn-small {
  padding: 7px 11px;
  font-size: 12px;
}

.btn-block { width: 100%; }

.market-summary {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 22px 25px;
  margin-bottom: 20px;
  gap: 20px;
}

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

.price-value {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -.8px;
}

.summary-item {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 9px;
  border-left: 1px solid var(--border);
  padding-left: 24px;
}

.summary-item strong { font-size: 15px; }

.trade-grid {
  display: grid;
  grid-template-columns: minmax(260px, 1.05fr)
    minmax(260px, .95fr);
  gap: 18px;
  align-items: start;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  min-width: 0;
}

.orderbook-panel, .trade-panel, .recent-panel {
  padding: 19px;
}

.panel-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.tag {
  background: #eff4ff;
  color: var(--primary);
  padding: 5px 9px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
}

.book-header, .book-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  padding: 9px 7px;
  text-align: right;
}

.book-header {
  color: var(--muted);
  font-size: 11px;
  border-bottom: 1px solid var(--border);
}

.book-header span:first-child,
.book-row span:first-child { text-align: left; }

.book-row {
  position: relative;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  border-bottom: 1px solid #f2f4f7;
}

.book-row span {
  position: relative;
  z-index: 1;
}

.book-row .book-bar {
  position: absolute;
  top: 2px;
  bottom: 2px;
  right: 0;
  opacity: .12;
  border-radius: 4px;
  z-index: 0;
}

.sell-list .book-row { color: var(--red); }
.sell-list .book-bar { background: var(--red); }
.buy-list .book-row { color: var(--green); }
.buy-list .book-bar { background: var(--green); }

.book-divider {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 13px 7px;
  margin: 5px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  color: var(--muted);
}

.book-divider strong {
  font-size: 18px;
  color: var(--text);
}

.book-legend {
  display: flex;
  gap: 18px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 11px;
}

.dot {
  width: 7px;
  height: 7px;
  display: inline-block;
  border-radius: 50%;
  margin-right: 5px;
}

.dot.red { background: var(--red); }
.dot.green { background: var(--green); }

.side-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: #f1f3f7;
  padding: 4px;
  border-radius: 9px;
  margin-bottom: 20px;
}

.side-btn {
  border: 0;
  padding: 11px;
  background: transparent;
  border-radius: 7px;
  font-weight: 750;
  color: var(--muted);
}

.side-btn.buy.selected {
  background: var(--green-bg);
  color: var(--green);
}

.side-btn.sell.selected {
  background: var(--red-bg);
  color: var(--red);
}

.trade-panel form > label { margin-top: 14px; }

.estimate {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  background: #f7f9fc;
  padding: 13px;
  border-radius: 8px;
  margin: 17px 0 12px;
}

.estimate div {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.estimate strong { font-size: 13px; }

.hint {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.6;
  margin: 10px 0 15px;
}

.quick-info {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 10px;
  margin-top: 16px;
}

.recent-panel {
  grid-column: 1 / -1;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  white-space: nowrap;
  font-size: 12px;
}

th {
  text-align: left;
  padding: 11px 12px;
  color: var(--muted);
  font-weight: 600;
  background: #f8f9fc;
}

td {
  padding: 12px;
  border-bottom: 1px solid #f0f2f6;
}

.empty {
  color: #a1aaba;
  text-align: center !important;
  padding: 24px !important;
}

.section-panel {
  padding: 20px;
  margin-bottom: 18px;
}

.balance-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
  margin-bottom: 18px;
}

.balance-card {
  padding: 20px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow);
}

.balance-card span {
  color: var(--muted);
  font-size: 12px;
}

.balance-card strong {
  font-size: 24px;
  font-weight: 800;
}

.inline-form {
  display: flex;
  align-items: end;
  gap: 14px;
}

.inline-form > div { width: 220px; }

.form-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-stack label { margin: 0; }

.admin-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
}

.admin-grid .section-panel { margin: 0; }

.status-pill {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 5px;
  font-size: 11px;
  background: #eef2f7;
  color: #68778c;
}

.status-open, .status-filled {
  background: var(--green-bg);
  color: var(--green);
}

.status-cancelled, .status-closed, .status-rejected {
  background: var(--red-bg);
  color: var(--red);
}

.text-buy { color: var(--green); font-weight: 700; }
.text-sell { color: var(--red); font-weight: 700; }

.notice {
  padding: 12px 15px;
  border-radius: 8px;
  margin-bottom: 16px;
  background: #eaf2ff;
  color: #2458b5;
  border: 1px solid #d8e6ff;
}

.notice.error {
  background: #fff0f0;
  color: #b93838;
  border-color: #f6dada;
}

.notice.success {
  background: #e9f8f0;
  color: #14764f;
  border-color: #d0efdf;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  background: rgba(20, 30, 48, .38);
  display: grid;
  place-items: center;
  padding: 20px;
}

.modal-card {
  width: min(420px, 100%);
  background: white;
  padding: 28px;
  border-radius: 15px;
  position: relative;
  box-shadow: 0 20px 70px rgba(0,0,0,.15);
}

.modal-card h2 {
  font-size: 23px;
  margin-bottom: 20px;
}

.modal-close {
  position: absolute;
  right: 17px;
  top: 13px;
  border: 0;
  background: transparent;
  color: #8490a0;
  font-size: 25px;
}

.auth-switch {
  display: flex;
  gap: 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
}

.auth-switch button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 10px 2px;
}

.auth-switch button.selected {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
  font-weight: 700;
}

.mobile-nav { display: none; }

@media (max-width: 900px) {
  .topbar { padding: 0 18px; }
  .desktop-nav { gap: 0; }
  .nav-btn { padding: 9px; font-size: 12px; }
  .trade-grid { grid-template-columns: 1fr 1fr; }
  .recent-panel { grid-column: 1 / -1; }
}

@media (max-width: 650px) {
  body { padding-bottom: 65px; }

  .topbar {
    height: 58px;
    padding: 0 14px;
  }

  .brand { font-size: 16px; }
  .brand-icon { width: 30px; height: 30px; }
  .desktop-nav { display: none; }
  .top-user { gap: 7px; }
  .top-user #header-user { display: none; }
  .top-user .btn { padding: 8px 11px; font-size: 12px; }

  .container { padding: 22px 13px 30px; }

  .page-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  h1 { font-size: 23px; }

  .market-picker {
    width: 100%;
    align-items: center;
  }

  .market-picker select { flex: 1; }

  .market-summary {
    grid-template-columns: 1fr 1fr;
    padding: 16px;
    gap: 16px;
  }

  .price-main { grid-column: 1 / -1; }
  .price-value { font-size: 29px; }

  .summary-item {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--border);
    padding-top: 12px;
  }

  .trade-grid { grid-template-columns: 1fr; gap: 13px; }
  .recent-panel { grid-column: auto; }
  .orderbook-panel, .trade-panel, .recent-panel { padding: 15px; }

  .balance-grid { grid-template-columns: 1fr; gap: 10px; }
  .balance-card { padding: 15px; }
  .balance-card strong { font-size: 21px; }

  .inline-form {
    align-items: stretch;
    flex-direction: column;
  }

  .inline-form > div { width: 100%; }

  .admin-grid { grid-template-columns: 1fr; }
  .section-panel { padding: 15px; }

  .mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: white;
    border-top: 1px solid var(--border);
    z-index: 20;
    justify-content: space-around;
    padding-bottom: env(safe-area-inset-bottom);
  }

  .mobile-nav-btn {
    flex: 1;
    background: transparent;
    border: 0;
    color: #8390a2;
    font-size: 12px;
  }

  .mobile-nav-btn.active {
    color: var(--primary);
    font-weight: 750;
  }

  .modal-card { padding: 23px; }
  .quick-info { flex-wrap: wrap; gap: 7px; }
}