/*
 * options.css — the Options Board (/options).
 *
 * An options-intelligence terminal that reads Deribit. It extends the house
 * terminal system (terminal-tokens.css): navy canvas, one orange accent for
 * interaction/selection, mint/red for market direction, JetBrains Mono for every
 * number, IBM Plex Sans for copy. No colored side-stripes, no gradient text, no
 * hero-metric block, no identical card grids. The signature is the STRIKE LADDER:
 * an options-chain the trader already reads, turned into a gamma-wall map.
 */

.opt-shell { max-width: 1180px; margin: 0 auto; padding: 22px 16px 96px; }

/* ── Header row: title + the currency switch + freshness ─────────────────── */
.opt-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.opt-title { font-family: var(--tt-display, var(--tt-mono)); font-weight: 800; letter-spacing: -0.03em;
  font-size: clamp(1.5rem, 3.4vw, 2.15rem); color: var(--tt-text); line-height: 1.05; margin: 0; }
.opt-title b { color: var(--tt-accent-text, #FF8A5C); font-weight: 800; }
.opt-sub { color: var(--tt-text-muted); font-size: 0.9rem; margin: 6px 0 0; max-width: 60ch; }
.opt-venue { font-size: 0.72rem; color: var(--tt-text-dim-text, #93AEC4); font-family: var(--tt-mono); letter-spacing: 0.02em; }
.opt-venue .dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--tt-up); margin-right: 5px; vertical-align: middle; box-shadow: 0 0 6px var(--tt-up); }
.opt-venue.stale .dot { background: var(--tt-text-dim); box-shadow: none; }

/* Currency switch: a real segmented control, not tabs-as-cards. */
.opt-switch { display: inline-flex; background: var(--tt-input-bg, #0D3152); border: 1px solid var(--tt-border); border-radius: 11px; padding: 3px; gap: 2px; }
.opt-switch button { appearance: none; border: 0; background: transparent; color: var(--tt-text-muted); cursor: pointer;
  font-family: var(--tt-mono); font-weight: 700; font-size: 0.9rem; padding: 7px 16px; border-radius: 8px; letter-spacing: -0.01em;
  transition: background .16s var(--tt-ease-out, ease-out), color .16s var(--tt-ease-out, ease-out); }
.opt-switch button[aria-selected="true"] { background: var(--tt-panel-solid, #103756); color: var(--tt-text); box-shadow: 0 1px 3px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.04); }
.opt-switch button:hover:not([aria-selected="true"]) { color: var(--tt-text); }
.opt-switch button:focus-visible { outline: 2px solid var(--tt-accent); outline-offset: 2px; }

/* ── Instrument strip: the state of options in one glance. Three readings on
 *    one bar, hairline-divided, NOT a card grid or a big-number hero. ─────── */
.opt-strip { display: grid; grid-template-columns: 1fr 1fr 1fr; background: var(--tt-panel-grad, #103756);
  border: 1px solid var(--tt-border); border-radius: 14px; box-shadow: var(--tt-shadow); overflow: hidden; margin-bottom: 16px; }
.opt-cell { padding: 15px 18px; border-left: 1px solid var(--tt-border-soft); }
.opt-cell:first-child { border-left: 0; }
.opt-cell .k { font-size: 0.72rem; color: var(--tt-text-muted); margin: 0 0 7px; font-weight: 600; }
.opt-cell .k .gloss { color: var(--tt-text-dim-text, #93AEC4); font-weight: 400; }
.opt-cell .v { font-family: var(--tt-mono); font-weight: 800; font-size: 1.5rem; color: var(--tt-text); line-height: 1; font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.opt-cell .v small { font-size: 0.85rem; font-weight: 600; color: var(--tt-text-muted); }

/* Jumpiness gauge (DVOL) — a filled track, not a ring. */
.opt-gauge { height: 8px; border-radius: 5px; background: var(--tt-input-bg, #0D3152); margin-top: 10px; overflow: hidden; position: relative; }
.opt-gauge > i { display: block; height: 100%; border-radius: 5px; background: linear-gradient(90deg, var(--tt-up) 0%, var(--tt-accent) 62%, var(--tt-down) 100%); }
.opt-gauge-mark { display: flex; justify-content: space-between; font-size: 0.64rem; color: var(--tt-text-dim-text,#93AEC4); font-family: var(--tt-mono); margin-top: 5px; }

/* Put/call lean — a diverging bar from center. */
.opt-lean { height: 10px; border-radius: 5px; margin-top: 10px; display: flex; overflow: hidden; background: var(--tt-input-bg,#0D3152); }
.opt-lean > .calls { background: var(--tt-up); }
.opt-lean > .puts { background: var(--tt-down); }
.opt-lean-key { display: flex; justify-content: space-between; font-size: 0.64rem; font-family: var(--tt-mono); margin-top: 5px; }
.opt-lean-key .up { color: var(--tt-up); } .opt-lean-key .dn { color: var(--tt-down); }

/* ── The Strike Ladder (signature). Options-chain rows: strike in the middle,
 *    call OI diverging left (mint), put OI right (red), price + max pain marked. */
.opt-board { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: 16px; align-items: start; }
@media (max-width: 900px) { .opt-board { grid-template-columns: 1fr; } }

.opt-panel { background: var(--tt-panel-grad, #103756); border: 1px solid var(--tt-border); border-radius: 14px; box-shadow: var(--tt-shadow); overflow: hidden; }
.opt-panel-h { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; padding: 14px 18px 10px; }
.opt-panel-h h2 { font-family: var(--tt-mono); font-weight: 800; font-size: 1rem; color: var(--tt-text); margin: 0; letter-spacing: -0.01em; }
.opt-panel-h .note { font-size: 0.74rem; color: var(--tt-text-muted); }

.opt-ladder { padding: 4px 12px 14px; }
.opt-ladder-legend { display: flex; gap: 16px; justify-content: center; padding: 2px 0 10px; font-size: 0.7rem; font-family: var(--tt-mono); color: var(--tt-text-muted); }
.opt-ladder-legend .up::before, .opt-ladder-legend .dn::before { content: ""; display: inline-block; width: 9px; height: 9px; border-radius: 2px; margin-right: 5px; vertical-align: middle; }
.opt-ladder-legend .up::before { background: var(--tt-up); } .opt-ladder-legend .dn::before { background: var(--tt-down); }

.opt-row { display: grid; grid-template-columns: 1fr 88px 1fr; align-items: center; gap: 8px; height: 26px; position: relative; }
.opt-row + .opt-row { margin-top: 3px; }
/* The track fills its half of the row so the fill (an absolute child sized by
 * OI %) has room to grow from the centre outward. Without the explicit width the
 * track collapses to zero and the bars vanish, leaving only the numbers. */
.opt-bar { height: 16px; border-radius: 3px; position: relative; width: 100%; }
.opt-bar.call { background: var(--tt-up-soft, rgba(55,217,138,.13)); }
.opt-bar.call > i { position: absolute; right: 0; top: 0; height: 100%; min-width: 2px; border-radius: 3px; background: var(--tt-up); box-shadow: -1px 0 6px rgba(55,217,138,.25); }
.opt-bar.put { background: var(--tt-down-soft, rgba(250,87,114,.13)); }
.opt-bar.put > i { position: absolute; left: 0; top: 0; height: 100%; min-width: 2px; border-radius: 3px; background: var(--tt-down); box-shadow: 1px 0 6px rgba(250,87,114,.25); }
/* Walls read louder: the fill brightens on the heaviest strikes. */
.opt-row.wall .opt-bar > i { filter: saturate(1.15) brightness(1.06); }
.opt-strike { text-align: center; font-family: var(--tt-mono); font-weight: 700; font-size: 0.82rem; color: var(--tt-text); font-variant-numeric: tabular-nums; }
/* OI dollars ride the OUTER end of each bar, inside the track, so they never
 * spill past the panel; a shadow keeps them legible on the fill or the rail. */
.opt-oi-usd { position: absolute; top: 50%; transform: translateY(-50%); font-family: var(--tt-mono); font-size: 0.62rem; color: var(--tt-text); opacity: .92; text-shadow: 0 1px 2px rgba(0,0,0,.55); pointer-events: none; font-variant-numeric: tabular-nums; }
.opt-bar.call .opt-oi-usd { left: 6px; } .opt-bar.put .opt-oi-usd { right: 6px; }

/* A "wall" (biggest OI strikes) — the strike text lifts, no side-stripe. */
.opt-row.wall .opt-strike { color: var(--tt-accent-text, #FF8A5C); }
.opt-row.wall .opt-strike::after { content: "wall"; display: block; font-size: 0.55rem; font-weight: 600; color: var(--tt-text-dim-text,#93AEC4); letter-spacing: .03em; line-height: 1; margin-top: 1px; }

/* Price marker: a bright accent line laid across the ladder between two rows. */
.opt-price-line { grid-column: 1 / -1; height: 0; border-top: 2px dashed var(--tt-accent); position: relative; margin: 2px 0; }
.opt-price-line span { position: absolute; right: 8px; top: -9px; background: var(--tt-accent); color: #21160f; font-family: var(--tt-mono); font-weight: 800; font-size: 0.64rem; padding: 1px 7px; border-radius: 5px; }

/* Max-pain row highlight (the strike price is drawn toward). */
.opt-row.maxpain .opt-strike { box-shadow: inset 0 0 0 1.5px var(--tt-border); border-radius: 5px; }

/* ── Right column stack: max pain, expiries, plain-English glosses ───────── */
.opt-side > * + * { margin-top: 16px; }

.opt-maxpain-body { padding: 6px 18px 16px; }
.opt-mp-row { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; padding: 9px 0; border-top: 1px solid var(--tt-border-soft); }
.opt-mp-row:first-child { border-top: 0; }
.opt-mp-exp { font-family: var(--tt-mono); font-size: 0.82rem; color: var(--tt-text); }
.opt-mp-exp small { color: var(--tt-text-muted); font-size: 0.7rem; margin-left: 5px; }
.opt-mp-strike { font-family: var(--tt-mono); font-weight: 800; font-size: 0.95rem; color: var(--tt-text); font-variant-numeric: tabular-nums; }
.opt-mp-delta { font-family: var(--tt-mono); font-size: 0.72rem; }
.opt-mp-delta.up { color: var(--tt-up); } .opt-mp-delta.dn { color: var(--tt-down); }

.opt-expiry-body { padding: 6px 18px 16px; }
.opt-exp-row { display: grid; grid-template-columns: 74px 1fr 62px; align-items: center; gap: 10px; padding: 7px 0; }
.opt-exp-when { font-family: var(--tt-mono); font-size: 0.8rem; color: var(--tt-text); }
.opt-exp-when small { display: block; color: var(--tt-text-muted); font-size: 0.66rem; }
.opt-exp-track { height: 9px; border-radius: 5px; background: var(--tt-input-bg,#0D3152); overflow: hidden; }
.opt-exp-track > i { display: block; height: 100%; border-radius: 5px; background: var(--tt-accent); opacity: .85; }
.opt-exp-usd { font-family: var(--tt-mono); font-size: 0.76rem; color: var(--tt-text-muted); text-align: right; font-variant-numeric: tabular-nums; }

/* Plain-English learn line under a panel: a fact, not filler. */
.opt-learn { padding: 11px 18px 14px; border-top: 1px solid var(--tt-border-soft); color: var(--tt-text-muted); font-size: 0.8rem; line-height: 1.45; }
.opt-learn b { color: var(--tt-text); font-weight: 600; }

/* ── Whale option flow: the live large-trade feed (full width) ───────────── */
.opt-flow { margin-top: 16px; }
.opt-flow-list { padding: 4px 6px 10px; }
.opt-fl { display: grid; grid-template-columns: 62px minmax(0,1fr) 96px 88px 64px; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 9px; }
.opt-fl + .opt-fl { border-top: 1px solid var(--tt-border-soft); }
.opt-fl:hover { background: rgba(255,246,234,.03); }
.opt-fl .side { font-family: var(--tt-mono); font-weight: 800; font-size: 0.74rem; padding: 3px 0; text-align: center; border-radius: 6px; }
.opt-fl .side.buy { color: var(--tt-up); background: var(--tt-up-soft, rgba(55,217,138,.13)); }
.opt-fl .side.sell { color: var(--tt-down); background: var(--tt-down-soft, rgba(250,87,114,.13)); }
.opt-fl .inst { font-family: var(--tt-mono); font-size: 0.84rem; color: var(--tt-text); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.opt-fl .inst .cp { font-weight: 800; }
.opt-fl .inst .cp.C { color: var(--tt-up); } .opt-fl .inst .cp.P { color: var(--tt-down); }
.opt-fl .inst small { color: var(--tt-text-muted); }
.opt-fl .notion { font-family: var(--tt-mono); font-weight: 700; font-size: 0.86rem; color: var(--tt-text); text-align: right; font-variant-numeric: tabular-nums; }
.opt-fl .prem { font-family: var(--tt-mono); font-size: 0.72rem; color: var(--tt-text-muted); text-align: right; font-variant-numeric: tabular-nums; }
.opt-fl .iv { font-family: var(--tt-mono); font-size: 0.72rem; color: var(--tt-text-dim-text,#93AEC4); text-align: right; }
.opt-fl .ago { display: none; }
.opt-fl.fresh { animation: optFlash .9s var(--tt-ease-out, ease-out); }
@keyframes optFlash { from { background: rgba(238,90,44,.14); } to { background: transparent; } }

/* ── Empty / loading states teach and never break the page ──────────────── */
.opt-empty { padding: 26px 18px; text-align: center; color: var(--tt-text-muted); font-size: 0.86rem; }
.opt-empty b { color: var(--tt-text); display: block; margin-bottom: 4px; font-family: var(--tt-mono); }
.opt-skel { background: linear-gradient(90deg, var(--tt-input-bg,#0D3152) 25%, rgba(255,246,234,.05) 50%, var(--tt-input-bg,#0D3152) 75%); background-size: 200% 100%; animation: optSkel 1.3s infinite; border-radius: 5px; }
@keyframes optSkel { from { background-position: 200% 0; } to { background-position: -200% 0; } }

.opt-fl-head, .opt-cell .k, .opt-panel-h .note { font-family: var(--tt-sans); }

/* Mobile: the flow columns tighten; ladder stays but rows shorten. */
@media (max-width: 640px) {
  .opt-strip { grid-template-columns: 1fr; }
  .opt-cell { border-left: 0; border-top: 1px solid var(--tt-border-soft); }
  .opt-cell:first-child { border-top: 0; }
  .opt-fl { grid-template-columns: 54px minmax(0,1fr) 78px; }
  .opt-fl .prem, .opt-fl .iv { display: none; }
  .opt-row { grid-template-columns: 1fr 72px 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .opt-fl.fresh { animation: none; }
  .opt-skel { animation: none; }
}

/* ── Compact variant embedded on a coin page (partials/options-mini.ejs) ─── */
.opt-mini { background: var(--tt-panel-grad, #103756); border: 1px solid var(--tt-border); border-radius: 12px; box-shadow: var(--tt-shadow); padding: 14px 16px 12px; }
.opt-mini-strip { display: flex; flex-wrap: wrap; gap: 9px 22px; margin-bottom: 12px; }
.opt-mini-strip .oms { font-size: 0.78rem; color: var(--tt-text-muted); font-family: var(--tt-sans); }
.opt-mini-strip .oms b { font-family: var(--tt-mono); font-weight: 800; font-size: 1.05rem; color: var(--tt-text); margin-right: 4px; font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.opt-mini-strip .omg { font-style: normal; color: var(--tt-text-dim-text,#93AEC4); font-size: 0.72rem; margin-left: 2px; }
.opt-mini-strip .omg.up { color: var(--tt-up); } .opt-mini-strip .omg.dn { color: var(--tt-down); }
.opt-ladder-mini { padding: 0; }
.opt-ladder-mini .opt-row { height: 22px; grid-template-columns: 1fr 80px 1fr; }
.opt-ladder-mini .opt-row + .opt-row { margin-top: 2px; }
.opt-ladder-mini .opt-bar { height: 14px; }
.opt-mini-more { display: inline-flex; align-items: center; gap: 5px; margin-top: 12px; font-family: var(--tt-mono); font-size: 0.8rem; color: var(--tt-accent-text,#FF8A5C); text-decoration: none; font-weight: 600; }
.opt-mini-more:hover { text-decoration: underline; }
.opt-mini-more:focus-visible { outline: 2px solid var(--tt-accent); outline-offset: 2px; border-radius: 4px; }