:root {
  --bg: #0e1116;
  --panel: #151a21;
  --panel-2: #1b212b;
  --line: #252c37;
  --text: #d7dee9;
  --muted: #7d8798;
  --up: #26a69a;
  --down: #ef5350;
  --accent: #2962ff;
  --gold: #f0b90b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 14px;
}

/* ------------------------------- topbar ------------------------------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.55rem 1rem;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.home-link { color: var(--muted); text-decoration: none; font-size: 0.85rem; }
.home-link:hover { color: var(--text); }
.brand { font-weight: 700; letter-spacing: 0.2px; }

.index-strip { display: flex; gap: 0.6rem; flex: 1; }
.index-chip {
  display: flex; align-items: baseline; gap: 0.4rem;
  background: var(--panel-2); border: 1px solid var(--line);
  padding: 0.25rem 0.6rem; border-radius: 6px; font-size: 0.8rem;
}
.index-chip .label { color: var(--muted); font-weight: 600; }
.index-chip .value { font-variant-numeric: tabular-nums; }

.topbar-right { display: flex; align-items: center; gap: 0.8rem; }
.players { display: flex; align-items: center; gap: 0.4rem; font-size: 0.8rem; color: var(--muted); }
.players .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--up);
  box-shadow: 0 0 0 0 rgba(38,166,154,0.7); animation: pulse 2s infinite;
}
@keyframes pulse {
  70% { box-shadow: 0 0 0 7px rgba(38,166,154,0); }
  100% { box-shadow: 0 0 0 0 rgba(38,166,154,0); }
}
.user { font-size: 0.8rem; color: var(--muted); }
.btn-ghost {
  color: var(--text); text-decoration: none; font-size: 0.8rem;
  border: 1px solid var(--line); padding: 0.3rem 0.7rem; border-radius: 6px;
}
.btn-ghost:hover { border-color: var(--accent); }

.guest-banner {
  background: rgba(41,98,255,0.12);
  border-bottom: 1px solid var(--line);
  padding: 0.5rem 1rem; font-size: 0.82rem; color: var(--text); text-align: center;
}
.guest-banner a { color: #6d9bff; }

/* ------------------------------- layout ------------------------------- */
.layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr) 320px;
  gap: 10px;
  padding: 10px;
  height: calc(100vh - 52px);
}
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

/* ----------------------------- watchlist ----------------------------- */
.panel-head { padding: 0.6rem; border-bottom: 1px solid var(--line); }
#symbol-search {
  width: 100%; background: var(--panel-2); border: 1px solid var(--line);
  color: var(--text); border-radius: 6px; padding: 0.45rem 0.6rem; font-size: 0.85rem;
}
#symbol-search:focus { outline: none; border-color: var(--accent); }

.tabs { display: flex; border-bottom: 1px solid var(--line); overflow-x: auto; }
.tab {
  flex: 1; background: none; border: none; color: var(--muted);
  padding: 0.5rem 0.3rem; font-size: 0.75rem; cursor: pointer; white-space: nowrap;
  border-bottom: 2px solid transparent;
}
.tab.active { color: var(--text); border-bottom-color: var(--accent); }

.symbol-list { overflow-y: auto; flex: 1; }
.symbol-row {
  display: grid; grid-template-columns: 1fr auto; gap: 2px 8px;
  padding: 0.45rem 0.6rem; cursor: pointer; border-bottom: 1px solid rgba(37,44,55,0.5);
}
.symbol-row:hover { background: var(--panel-2); }
.symbol-row.active { background: rgba(41,98,255,0.14); }
.symbol-row .sym { font-weight: 700; font-size: 0.82rem; }
.symbol-row .nm {
  grid-column: 1; color: var(--muted); font-size: 0.68rem;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.symbol-row .px { font-variant-numeric: tabular-nums; font-size: 0.82rem; text-align: right; }
.symbol-row .ch { font-size: 0.68rem; text-align: right; font-variant-numeric: tabular-nums; }
.up { color: var(--up); }
.down { color: var(--down); }

/* ------------------------------- chart ------------------------------- */
.chart-panel { position: relative; }
.chart-head {
  display: flex; align-items: center; gap: 1.2rem;
  padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--line); flex-wrap: wrap;
}
.symbol-block h1 { margin: 0; font-size: 1.15rem; letter-spacing: 0.3px; }
.symbol-block .sub { color: var(--muted); font-size: 0.72rem; }
.price-block .last { font-size: 1.3rem; font-variant-numeric: tabular-nums; font-weight: 600; }
.price-block .delta { font-size: 0.78rem; font-variant-numeric: tabular-nums; }
.stats { display: flex; gap: 1rem; font-size: 0.72rem; color: var(--muted); flex-wrap: wrap; }
.stats b { color: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; }

.chart-toolbar {
  display: flex; justify-content: space-between; align-items: center; gap: 0.6rem;
  padding: 0.4rem 0.7rem; border-bottom: 1px solid var(--line); flex-wrap: wrap;
}
.timeframes, .tools { display: flex; gap: 3px; }
.timeframes button, .tool {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--muted);
  padding: 0.28rem 0.55rem; border-radius: 5px; cursor: pointer; font-size: 0.75rem;
  min-width: 30px; line-height: 1.1;
}
.timeframes button:hover, .tool:hover { color: var(--text); border-color: #3a4453; }
.timeframes button.active, .tool.active {
  background: var(--accent); border-color: var(--accent); color: #fff;
}
.tool.danger:hover { border-color: var(--down); color: var(--down); }

.chart-wrap { flex: 1; min-height: 0; position: relative; }
#chart { width: 100%; height: 100%; display: block; touch-action: none; }

/* ------------------------------- trade ------------------------------- */
.trade-panel { padding: 0; }
.account { padding: 0.7rem 0.8rem; border-bottom: 1px solid var(--line); background: var(--panel-2); }
.account-row { display: flex; justify-content: space-between; font-size: 0.8rem; padding: 0.12rem 0; }
.account-row span { color: var(--muted); }
.account-row strong { font-variant-numeric: tabular-nums; }

.tab-panel { display: none; padding: 0.7rem 0.8rem; overflow-y: auto; flex: 1; }
.tab-panel.active { display: block; }

.side-toggle { display: flex; gap: 6px; margin-bottom: 0.6rem; }
.side {
  flex: 1; padding: 0.45rem; border-radius: 6px; cursor: pointer; font-weight: 600;
  background: var(--panel-2); border: 1px solid var(--line); color: var(--muted); font-size: 0.85rem;
}
.side.buy.active { background: var(--up); border-color: var(--up); color: #04211e; }
.side.sell.active { background: var(--down); border-color: var(--down); color: #2b0b0a; }

.field { display: block; margin-bottom: 0.55rem; }
.field span { display: block; color: var(--muted); font-size: 0.72rem; margin-bottom: 0.18rem; }
.field input, .field select {
  width: 100%; background: var(--panel-2); border: 1px solid var(--line);
  color: var(--text); border-radius: 6px; padding: 0.4rem 0.5rem; font-size: 0.85rem;
}
.field input:focus, .field select:focus { outline: none; border-color: var(--accent); }
.protective { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }

.estimate {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 6px;
  padding: 0.45rem 0.6rem; font-size: 0.75rem; color: var(--muted); margin-bottom: 0.6rem;
  font-variant-numeric: tabular-nums;
}
.submit {
  width: 100%; padding: 0.6rem; border: none; border-radius: 7px; cursor: pointer;
  font-weight: 700; font-size: 0.9rem; color: #06231f;
}
.submit.buy { background: var(--up); }
.submit.sell { background: var(--down); color: #2b0b0a; }
.submit:disabled { opacity: 0.5; cursor: not-allowed; }

.form-msg { min-height: 1.1em; font-size: 0.75rem; margin-top: 0.45rem; }
.form-msg.error { color: var(--down); }
.form-msg.ok { color: var(--up); }

.section-head {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.6px;
  color: var(--muted); margin: 1rem 0 0.4rem;
}
.mini-list { display: flex; flex-direction: column; gap: 4px; }
.mini-row {
  display: grid; grid-template-columns: 1fr auto; gap: 2px 6px;
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 6px;
  padding: 0.4rem 0.5rem; font-size: 0.76rem;
}
.mini-row .t { font-weight: 600; }
.mini-row .s { color: var(--muted); font-size: 0.68rem; grid-column: 1; }
.mini-row .v { text-align: right; font-variant-numeric: tabular-nums; }
.mini-row button {
  background: none; border: 1px solid var(--line); color: var(--muted);
  border-radius: 4px; font-size: 0.65rem; padding: 0.1rem 0.35rem; cursor: pointer;
}
.mini-row button:hover { color: var(--down); border-color: var(--down); }
.empty { color: var(--muted); font-size: 0.75rem; padding: 0.4rem 0; }

/* ------------------------------ options ------------------------------ */
.chain-head, .chain-row {
  display: grid; grid-template-columns: 1fr 62px 1fr; gap: 4px;
  font-size: 0.72rem; align-items: center;
}
.chain-head {
  color: var(--muted); text-transform: uppercase; letter-spacing: 0.4px;
  padding: 0.35rem 0; border-bottom: 1px solid var(--line); text-align: center;
}
.chain { display: flex; flex-direction: column; gap: 2px; margin-top: 4px; }
.chain-row { padding: 1px 0; }
.chain-row .strike-col {
  text-align: center; font-weight: 700; font-variant-numeric: tabular-nums;
  background: var(--panel-2); border-radius: 4px; padding: 0.28rem 0;
}
.opt {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 4px;
  padding: 0.26rem 0.35rem; cursor: pointer; text-align: center;
  font-variant-numeric: tabular-nums; color: var(--text);
}
.opt:hover { border-color: var(--gold); }
.opt.itm { background: rgba(240,185,11,0.09); }
.opt .greek { display: block; color: var(--muted); font-size: 0.62rem; }

/* ----------------------------- responsive ----------------------------- */
@media (max-width: 1100px) {
  .layout { grid-template-columns: 210px minmax(0,1fr) 280px; }
}
@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 60vh auto;
    height: auto;
  }
  .watchlist { max-height: 240px; }
  .index-strip { order: 3; width: 100%; }
}