:root {
  --bg: #14160f;
  --header: #1b1e14;
  --ink: #f4f1e6;
  --muted: #b4b09f;
  --faint: #6f6c60;
  --line: #313528;
  --call: #b7d7a8;
  --put: #efb5a0;
  --atm: #f0d78c;
  --atm-bg: #3a3420;
  --focus: #f0d78c;
}

* { box-sizing: border-box; }

html { scroll-behavior: auto; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.4 "Segoe UI", "Helvetica Neue", sans-serif;
  font-variant-numeric: tabular-nums;
}

header {
  position: sticky;
  top: 0;
  z-index: 3;
  background: var(--header);
  border-bottom: 1px solid var(--line);
  padding: 14px 22px 12px;
}

.title-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: baseline;
}

h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: 0.01em;
}

#delay {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: center;
  margin-top: 10px;
}

.symbols { display: flex; gap: 6px; }

.symbols button,
.actions button {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  font: inherit;
  cursor: pointer;
}

.symbols button[aria-selected="true"] {
  background: var(--atm);
  color: #231f12;
  border-color: var(--atm);
}

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

.auto { color: var(--muted); font-size: 13px; display: flex; gap: 6px; align-items: center; }

button:focus-visible, input:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.spot {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.banner {
  margin: 10px 0 0;
  color: #1c140c;
  background: var(--put);
  border-radius: 8px;
  padding: 8px 10px;
}

main {
  width: min(1080px, calc(100% - 28px));
  margin: 0 auto;
  padding: 42vh 0 48vh;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  position: sticky;
  top: var(--header-h, 108px);
  background: var(--bg);
  text-align: right;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}

th.call { color: var(--call); }
th.put { color: var(--put); }
th:first-child, td:first-child { text-align: left; }

td {
  text-align: right;
  padding: 7px 10px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

tr.call td:nth-child(4),
tr.call td:nth-child(5),
tr.atm td:nth-child(4),
tr.atm td:nth-child(5) { color: var(--call); }

tr.put td:nth-child(6),
tr.put td:nth-child(7),
tr.atm td:nth-child(6),
tr.atm td:nth-child(7) { color: var(--put); }

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

tr.atm td {
  background: var(--atm-bg);
  color: var(--atm);
  font-weight: 650;
}

.strike-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--atm);
  color: #231f12;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
}

#rows tr { cursor: pointer; }
#rows td.is-on { box-shadow: inset 0 0 0 2px var(--atm); }

.payoff {
  position: fixed;
  left: 50%;
  bottom: 12px;
  transform: translateX(-50%);
  z-index: 5;
  width: min(980px, calc(100% - 24px));
  max-height: 52vh;
  overflow: auto;
  background: #f4efe4;
  color: #243044;
  border-radius: 16px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  padding: 12px 14px 8px;
}

.payoff.is-idle {
  width: min(640px, calc(100% - 24px));
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.payoff p { margin: 0; }
.payoff h2 { margin: 0; font-size: 16px; font-weight: 650; }
.payoff-legs, .payoff-stats, .payoff-warn { margin-top: 4px; font-size: 13px; color: #4d5b6a; }
.payoff-warn { color: #8a5a12; }
.payoff-head, .payoff-controls, .payoff-legend { display: flex; gap: 12px; align-items: center; justify-content: space-between; }
.payoff-head { align-items: flex-start; }
.payoff-controls { flex-shrink: 0; }
.payoff-legend { margin: 8px 0 2px; font-size: 12px; color: #4d5b6a; justify-content: flex-start; }
.payoff label { display: flex; gap: 6px; align-items: center; font-size: 13px; }
.payoff select, .payoff button {
  background: #fff;
  color: #243044;
  border: 1px solid #d5ccbc;
  border-radius: 999px;
  padding: 4px 10px;
  font: inherit;
  cursor: pointer;
}
.swatch { display: inline-block; width: 22px; height: 0; border-top: 3px solid #243044; margin-right: 6px; vertical-align: middle; }
.swatch.put { border-top: 2px dashed #3c7dd9; }
.swatch.call { border-top: 2px dashed #e07a2f; }
.payoff svg { width: 100%; height: auto; display: block; }
.payoff .zone-profit { fill: #e5f3df; }
.payoff .zone-loss { fill: #f8d9d4; }
.payoff .grid { stroke: rgba(36, 48, 68, 0.08); }
.payoff .zero { stroke: #243044; stroke-dasharray: 4 4; }
.payoff .strike { stroke: rgba(36, 48, 68, 0.35); stroke-dasharray: 3 4; }
.payoff .leg { fill: none; stroke-linejoin: round; stroke-linecap: round; }
.payoff .leg.put { stroke: #3c7dd9; stroke-width: 2; stroke-dasharray: 7 5; }
.payoff .leg.call { stroke: #e07a2f; stroke-width: 2; stroke-dasharray: 7 5; }
.payoff .leg.combined { stroke: #243044; stroke-width: 2.8; }
.payoff .tick, .payoff .strike-label, .payoff .axis-name, .payoff .be-label, .payoff .tag { fill: #243044; font-size: 11px; }
.payoff .zone { fill: #3d6b46; font-size: 13px; font-weight: 650; letter-spacing: 0.04em; }
.payoff .zone.loss { fill: #8d4a42; }
.payoff .be { fill: #243044; }
.payoff .tag { font-weight: 650; }