:root {
  --bg: #ffffff;
  --surface: #f5f5f7;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --border: #d2d2d7;
  --accent: #0071e3;
  --success: #34c759;
  --warning: #ff9500;
  --danger: #ff3b30;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", sans-serif;
  line-height: 1.5;
  min-height: 100vh;
  margin: 0;
  -webkit-font-smoothing: antialiased;
}

button, input, select { font: inherit; }
button { cursor: pointer; }

.shell {
  max-width: 1600px;
  margin: 0 auto;
  padding: 32px 24px 48px;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 24px;
  align-items: end;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 24px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.hero-copy {
  max-width: 720px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.status-card {
  display: flex;
  gap: 12px;
  align-items: center;
  min-height: 80px;
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.status-card strong {
  display: block;
  font-size: 1rem;
  margin: 2px 0;
}

.status-card small {
  color: var(--muted);
  font-size: 0.8rem;
}

.pulse {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--warning);
}

.pulse.ok { background: var(--success); }
.pulse.bad { background: var(--danger); }

.muted { color: var(--muted); }

.flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-bottom: 24px;
  border-radius: 16px;
  overflow: hidden;
  background: var(--border);
}

.flow div {
  padding: 14px 18px;
  background: var(--surface);
}

.flow b {
  display: block;
  color: var(--accent);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
}

.flow span {
  display: block;
  margin-top: 3px;
  font-size: 1rem;
  font-weight: 700;
}

.flow em {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.78rem;
  font-style: normal;
}

.workbench {
  display: grid;
  grid-template-columns: 300px 1fr 340px;
  gap: 20px;
  align-items: start;
}

.control-panel, .market-panel, .detail-panel {
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.control-panel, .detail-panel {
  position: sticky;
  top: 16px;
  padding: 18px;
  overflow: visible;
}

.panel-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.panel-title span {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.stock-search-wrap { position: relative; }
.stock-search-wrap input { width: 100%; }

.stock-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 100;
  max-height: 220px;
  overflow-y: auto;
  margin: 4px 0 0;
  padding: 4px 0;
  list-style: none;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.stock-dropdown li {
  padding: 8px 12px;
  font-size: 0.88rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}

.stock-dropdown li:last-child { border-bottom: none; }
.stock-dropdown li:hover { background: var(--surface); }
.stock-dropdown .stock-empty,
.stock-dropdown .stock-empty:hover {
  color: var(--muted);
  cursor: default;
  background: var(--bg);
}
.stock-dropdown .stock-code { font-weight: 700; margin-right: 8px; }
.stock-dropdown .stock-name { color: var(--muted); font-size: 0.82rem; }

.field span, .search-box span {
  display: block;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 600;
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.field input, .search-box input, .field select {
  width: 100%;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0 12px;
  color: var(--text);
  background: var(--bg);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field input:focus, .search-box input:focus, .field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.12);
}

.quick-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-bottom: 14px;
}

.quick-row button, .ghost-button {
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  background: var(--bg);
  transition: all 0.15s;
}

.quick-row button {
  min-height: 32px;
  font-size: 0.76rem;
  font-weight: 600;
}

.ghost-button {
  min-height: 32px;
  padding: 0 12px;
  font-size: 0.76rem;
  font-weight: 600;
}

.quick-row button:hover, .ghost-button:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

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

.segmented {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 4px;
  margin: 0 0 14px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg);
}

.segmented input { position: absolute; opacity: 0; }

.segmented span {
  display: grid;
  place-items: center;
  min-height: 34px;
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
}

.segmented input:checked + span {
  color: #fff;
  background: var(--text);
}

.preset-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.preset-btn {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 4px;
  font-size: 0.74rem;
  font-weight: 600;
  background: var(--bg);
  color: var(--text);
  transition: all 0.15s;
}

.preset-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.preset-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.toggle { position: relative; width: 44px; height: 24px; }
.toggle input { opacity: 0; width: 0; height: 0; }

.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 24px;
  cursor: pointer;
  transition: background 0.2s;
}

.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.2s;
}

.toggle input:checked + .toggle-track {
  background: var(--accent);
}

.toggle input:checked + .toggle-track .toggle-thumb {
  transform: translateX(20px);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.action-row {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 8px;
  margin-top: 8px;
}

.primary-button {
  min-height: 44px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  background: var(--text);
  transition: opacity 0.15s, transform 0.1s;
}

.primary-button:hover:not(:disabled) { opacity: 0.88; }
.primary-button:active:not(:disabled) { transform: scale(0.98); }
.primary-button:disabled { cursor: wait; opacity: 0.4; }

.market-panel {
  min-width: 0;
  padding: 18px;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}

.metric-strip article {
  padding: 14px 10px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg);
  text-align: center;
}

.metric-strip span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
}

.metric-strip strong {
  display: block;
  margin-top: 8px;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.chain-area {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 16px;
  background: var(--bg);
}

.chain-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.chain-header h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0;
}

.chain-controls label {
  font-size: 0.82rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.chain-controls select {
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.82rem;
}

#chainChart {
  width: 100%;
  height: 380px;
}

.table-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 12px;
}

h2 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.table-toolbar p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.search-box {
  display: grid;
  gap: 5px;
  width: min(260px, 40%);
}

.table-wrap {
  overflow-y: scroll;
  overflow-x: auto;
  max-height: calc(100vh - 360px);
  min-height: 380px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg);
}

.table-wrap::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.table-wrap::-webkit-scrollbar-track {
  background: var(--surface);
  border-radius: 8px;
}

.table-wrap::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 8px;
}

.table-wrap::-webkit-scrollbar-thumb:hover {
  background: var(--muted);
}

table {
  width: 100%;
  min-width: 1600px;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.84rem;
}

th, td {
  padding: 11px 8px;
  border-bottom: 1px solid var(--border);
  text-align: right;
  white-space: nowrap;
}

th {
  position: sticky;
  top: 0;
  z-index: 2;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

th[data-key] { cursor: pointer; }
th[data-key]:hover { color: var(--text); }

td { font-variant-numeric: tabular-nums; }
tr:hover td { background: rgba(0, 0, 0, 0.015); }

.empty-row td {
  padding: 60px 20px;
  color: var(--muted);
  text-align: center;
}

.contract {
  display: grid;
  gap: 1px;
  text-align: left;
}

.contract strong { font-size: 0.84rem; }
.contract small { color: var(--muted); font-size: 0.74rem; }

.badge {
  display: inline-grid;
  place-items: center;
  min-width: 48px;
  min-height: 26px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
}

.badge.call {
  color: #1d1d1f;
  background: #e8e8ed;
}

.badge.put {
  color: #1d1d1f;
  background: #e8e8ed;
}

.signal {
  display: inline-grid;
  place-items: center;
  min-width: 52px;
  min-height: 26px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
}

.signal.strong_buy { background: #1d1d1f; color: #fff; }
.signal.buy { background: #e8e8ed; color: #1d1d1f; }
.signal.caution { background: #fff3e0; color: #c76e00; }
.signal.avoid { background: #fdecea; color: #c62828; }

.watch-button {
  min-height: 28px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 0 10px;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 600;
  background: var(--bg);
  transition: all 0.15s;
}

.watch-button:hover {
  background: var(--accent);
  color: #fff;
}

.detail-panel { min-width: 0; }

.selected-card {
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg);
}

.selected-card strong {
  display: block;
  margin: 2px 0;
}

.selected-card small {
  color: var(--muted);
  font-size: 0.8rem;
}

.ladder-head, .book-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.ladder-head {
  margin: 14px 0 6px;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 600;
}

.ladder-head span:last-child { text-align: right; }

.ladder { display: grid; gap: 5px; }

.book-empty {
  display: grid;
  place-items: center;
  min-height: 180px;
  border: 1px dashed var(--border);
  border-radius: 16px;
  color: var(--muted);
}

.book-cell {
  position: relative;
  overflow: hidden;
  min-height: 34px;
  border-radius: 10px;
  padding: 6px 8px;
  background: var(--bg);
  border: 1px solid var(--border);
}

.book-cell.ask { text-align: right; }

.book-bar {
  position: absolute;
  inset: 0;
  width: var(--w);
  opacity: 0.15;
}

.book-cell.bid .book-bar { background: var(--success); }
.book-cell.ask .book-bar { right: 0; left: auto; background: var(--danger); }

.book-price, .book-vol {
  position: relative;
  z-index: 1;
  display: block;
}

.book-price { font-weight: 700; font-size: 0.84rem; }
.book-vol { color: var(--muted); font-size: 0.7rem; }

.ticks {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.ticks-title {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 600;
}

.ticks-list {
  display: grid;
  gap: 5px;
  max-height: 220px;
  margin-top: 8px;
  overflow: auto;
}

.tick-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 8px;
  align-items: center;
  min-height: 32px;
  padding: 6px 8px;
  border-radius: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-size: 0.78rem;
}

.tick-row b { font-size: 0.84rem; }
.tick-row.buy b { color: var(--success); }
.tick-row.sell b { color: var(--danger); }

.hint-box {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg);
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.7;
}

.hint-box strong { color: var(--text); font-weight: 600; }

.hint-box summary {
  cursor: pointer;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.88rem;
  list-style: none;
}

.hint-box summary::-webkit-details-marker { display: none; }
.hint-box details[open] summary { margin-bottom: 10px; }

.param-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 8px 20px;
}

.param-item { display: flex; gap: 8px; align-items: baseline; }
.param-name { color: var(--text); font-weight: 600; min-width: 90px; font-size: 0.78rem; }
.param-desc { color: var(--muted); font-size: 0.78rem; }

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  max-width: 380px;
  padding: 12px 16px;
  border-radius: 14px;
  color: #fff;
  background: var(--text);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
  transform: translateY(16px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.18s ease, opacity 0.18s ease;
  font-size: 0.88rem;
  z-index: 100;
}

.toast.show { transform: translateY(0); opacity: 1; }

/* Responsive */
@media (max-width: 1300px) {
  .workbench {
    grid-template-columns: 280px 1fr;
  }
  .detail-panel {
    position: relative;
    top: 0;
    grid-column: 1 / -1;
  }
  .metric-strip {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .shell { padding: 20px 16px; }
  .hero, .workbench, .flow, .metric-strip { grid-template-columns: 1fr; }
  .control-panel, .detail-panel { position: relative; top: 0; }
  .table-toolbar { display: grid; }
  .search-box { width: 100%; }
  .table-wrap { max-height: 70vh; }
  .hide-narrow { display: none; }
}

@media (max-width: 560px) {
  .grid-2, .quick-row, .action-row, .preset-row { grid-template-columns: 1fr; }
  .segmented { grid-template-columns: 1fr; }
  th, td { padding: 8px 4px; }
}