/* Options Desk - derivatives-desk design system
   Display: Sora. Numerals/strikes/scores: Spline Sans Mono.
   Dark near-black desk; green = calls (identity), red used sparingly for puts/negatives. */

:root {
  /* surface ramp */
  --bg:        oklch(0.155 0.008 165);
  --bg-2:      oklch(0.185 0.010 168);
  --panel:     oklch(0.205 0.011 168);
  --panel-2:   oklch(0.235 0.013 168);
  --line:      oklch(0.315 0.014 168);
  --line-soft: oklch(0.265 0.012 168);

  /* ink */
  --ink:    oklch(0.965 0.006 165);
  --ink-2:  oklch(0.855 0.010 168);
  --muted:  oklch(0.735 0.014 168);
  --faint:  oklch(0.620 0.014 168);

  /* calls = green identity */
  --call:        oklch(0.72 0.15 150);
  --call-bright: oklch(0.82 0.155 150);
  --call-deep:   oklch(0.50 0.11 150);
  --call-glow:   oklch(0.72 0.15 150 / 0.28);
  --call-wash:   oklch(0.72 0.15 150 / 0.10);

  /* puts = red, sparing + accessible */
  --put:      oklch(0.685 0.175 25);
  --put-wash: oklch(0.685 0.175 25 / 0.12);

  --amber-note: oklch(0.80 0.11 90);

  --radius: 4px;
  --radius-lg: 8px;
  --wrap: 1180px;

  --mono: "Spline Sans Mono", ui-monospace, monospace;
  --sans: "Sora", system-ui, sans-serif;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  /* z-index scale */
  --z-sticky: 100;
  --z-toast: 400;

  --step--1: clamp(0.78rem, 0.76rem + 0.1vw, 0.85rem);
  --step-0:  clamp(0.98rem, 0.95rem + 0.15vw, 1.06rem);
  --step-1:  clamp(1.2rem, 1.12rem + 0.4vw, 1.45rem);
  --step-2:  clamp(1.5rem, 1.35rem + 0.75vw, 2rem);
  --step-3:  clamp(1.95rem, 1.6rem + 1.7vw, 3rem);
  --step-4:  clamp(2.6rem, 1.9rem + 3.4vw, 4.6rem);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--ink-2);
  background:
    radial-gradient(120% 80% at 82% -8%, var(--call-wash), transparent 60%),
    radial-gradient(90% 60% at 0% 0%, oklch(0.22 0.02 168 / 0.5), transparent 55%),
    var(--bg);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { font-family: var(--sans); color: var(--ink); line-height: 1.1; letter-spacing: -0.02em; text-wrap: balance; margin: 0; }
p { text-wrap: pretty; }
a { color: var(--call-bright); text-decoration-thickness: 1px; text-underline-offset: 3px; }

.wrap { width: min(var(--wrap), 100% - 2.5rem); margin-inline: auto; }

.mono { font-family: var(--mono); font-feature-settings: "tnum" 1; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip {
  position: absolute; left: 1rem; top: -3rem; z-index: var(--z-toast);
  background: var(--call); color: oklch(0.16 0.02 165); font-weight: 700;
  padding: 0.55rem 1rem; border-radius: var(--radius); transition: top 0.2s var(--ease);
}
.skip:focus { top: 1rem; }

:focus-visible { outline: 2px solid var(--call-bright); outline-offset: 2px; border-radius: 2px; }

/* ---------- desk ticker strip ---------- */
.deskbar {
  border-bottom: 1px solid var(--line-soft);
  background: oklch(0.135 0.008 165 / 0.85);
  overflow: hidden;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--faint);
}
.ticker {
  display: flex; gap: 2.5rem; width: max-content; padding: 0.4rem 0;
  animation: ticker 42s linear infinite;
}
.ticker span { display: inline-flex; gap: 0.5rem; align-items: center; text-transform: uppercase; }
.ticker b { color: var(--call); font-weight: 600; }
.ticker i { color: var(--put); font-style: normal; }
@keyframes ticker { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .ticker { animation: none; flex-wrap: wrap; width: 100%; padding-inline: 0; gap: 1.25rem; }
}

/* ---------- masthead ---------- */
.masthead {
  position: sticky; top: 0; z-index: var(--z-sticky);
  background: oklch(0.155 0.008 165 / 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.masthead__row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.75rem 0; }
.brand { display: inline-flex; align-items: center; gap: 0.65rem; text-decoration: none; color: var(--ink); }
.brand__mark {
  font-family: var(--mono); font-weight: 700; font-size: 0.9rem; letter-spacing: 0.02em;
  display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: var(--radius);
  color: oklch(0.16 0.02 165); background: linear-gradient(160deg, var(--call-bright), var(--call-deep));
  box-shadow: 0 0 0 1px var(--call-glow), 0 6px 18px -8px var(--call-glow);
}
.brand__name { font-weight: 700; letter-spacing: -0.01em; }
.masthead__meta { display: flex; gap: 0.6rem; align-items: center; font-family: var(--mono); font-size: 0.72rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.masthead__meta a { color: var(--muted); text-decoration: none; }
.masthead__meta a:hover { color: var(--call-bright); }
.dot-live { width: 7px; height: 7px; border-radius: 50%; background: var(--call); box-shadow: 0 0 0 3px var(--call-glow); }
@media (max-width: 620px) { .masthead__meta span.hide-sm { display: none; } }

/* ---------- hero ---------- */
.hero { padding: clamp(2.5rem, 1.5rem + 5vw, 5.5rem) 0 clamp(2rem, 4vw, 3.5rem); }
.hero__grid { display: grid; grid-template-columns: 1.35fr 0.85fr; gap: clamp(1.5rem, 3vw, 3rem); align-items: start; }
@media (max-width: 900px) { .hero__grid { grid-template-columns: 1fr; } }

.hero__tag {
  font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--call-bright); margin: 0 0 1.1rem;
  display: inline-flex; align-items: center; gap: 0.6rem;
}
.hero__tag::before { content: ""; width: 1.6rem; height: 1px; background: var(--call); }
.hero__title { font-size: var(--step-4); font-weight: 800; letter-spacing: -0.035em; margin-bottom: 1.1rem; }
.hero__title em { font-style: normal; color: var(--call-bright); }
.hero__lede { font-size: var(--step-1); line-height: 1.55; color: var(--ink-2); max-width: 40ch; margin: 0 0 1.8rem; }
.hero__cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem; font-family: var(--sans);
  font-weight: 650; font-size: 0.95rem; padding: 0.72rem 1.25rem; border-radius: var(--radius);
  text-decoration: none; border: 1px solid transparent; cursor: pointer;
  transition: transform 0.18s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.btn--primary { background: var(--call); color: oklch(0.16 0.02 165); box-shadow: 0 8px 24px -12px var(--call-glow); }
.btn--primary:hover { background: var(--call-bright); transform: translateY(-1px); box-shadow: 0 12px 30px -12px var(--call-glow); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--call); color: var(--call-bright); }
@media (prefers-reduced-motion: reduce) { .btn:hover { transform: none; } }

/* trade-ticket top pick */
.ticket {
  border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden;
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  box-shadow: 0 24px 60px -30px oklch(0 0 0 / 0.8), inset 0 0 0 1px oklch(1 0 0 / 0.02);
}
.ticket__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--line-soft);
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted);
}
.ticket__badge { color: var(--call); }
.ticket__body { padding: 1.1rem 0.9rem 1rem; }
.ticket__co { display: flex; align-items: center; gap: 0.7rem; margin-bottom: 0.9rem; }
.ticket__name { font-family: var(--sans); font-weight: 800; font-size: 1.35rem; letter-spacing: -0.02em; color: var(--ink); }
.ticket__score { font-family: var(--mono); margin-left: auto; text-align: right; }
.ticket__score b { display: block; font-size: 1.7rem; color: var(--call-bright); line-height: 1; }
.ticket__score small { font-size: 0.7rem; color: var(--faint); }
.ticket__rows { display: grid; gap: 0; font-family: var(--mono); font-size: 0.8rem; }
.ticket__rows div { display: flex; justify-content: space-between; gap: 1rem; padding: 0.4rem 0; border-top: 1px dashed var(--line-soft); }
.ticket__rows span:first-child { color: var(--faint); text-transform: uppercase; letter-spacing: 0.04em; font-size: 0.68rem; }
.ticket__rows span:last-child { color: var(--ink); }
.pos { color: var(--call); }

.hero__note {
  margin: clamp(1.8rem, 4vw, 2.8rem) 0 0; padding-top: 1.1rem; border-top: 1px solid var(--line-soft);
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.02em; color: var(--faint); max-width: 90ch;
}

/* ---------- section scaffolding ---------- */
section { scroll-margin-top: 5rem; }
.section-head { margin-bottom: clamp(1.4rem, 3vw, 2.2rem); }
.section-kicker { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--call); display: block; margin-bottom: 0.55rem; }
.section-h { font-size: var(--step-3); font-weight: 800; letter-spacing: -0.03em; }
.section-sub { color: var(--muted); max-width: 68ch; margin: 0.7rem 0 0; }

/* ---------- signature: option-chain comparison ---------- */
.chain { padding: clamp(1.5rem, 4vw, 3rem) 0; }
.chain__frame {
  border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden;
  background: linear-gradient(180deg, var(--bg-2), var(--bg));
  box-shadow: 0 30px 80px -40px oklch(0 0 0 / 0.85);
}
.chain__bar {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: 0.6rem 1rem; border-bottom: 1px solid var(--line);
  background: oklch(0.135 0.008 165 / 0.6);
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted);
}
.chain__bar .lgd { display: inline-flex; align-items: center; gap: 0.4rem; }
.chain__bar .k { color: var(--call); }
.chain__bar .k::before, .chain__bar .p::before { content: ""; width: 8px; height: 8px; border-radius: 2px; display: inline-block; }
.chain__bar .k::before { background: var(--call); }
.chain__bar .p { color: var(--put); }
.chain__bar .p::before { background: var(--put); }
.chain__bar .spacer { margin-left: auto; }

.chain__scroll { overflow-x: auto; }
table.chain__grid { width: 100%; border-collapse: collapse; font-size: 0.86rem; min-width: 920px; }
.chain__grid thead th {
  text-align: left; font-family: var(--mono); font-weight: 500;
  font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint);
  padding: 0.7rem 0.85rem; border-bottom: 1px solid var(--line); background: var(--bg-2); white-space: nowrap;
}
.chain__grid thead th.grp-call { color: var(--call); }
.chain__grid thead th.num, .chain__grid td.num { text-align: right; }
.chain__grid tbody td {
  padding: 0.85rem; border-bottom: 1px solid var(--line-soft); vertical-align: middle; color: var(--ink-2);
}
.chain__grid tbody tr { transition: background 0.15s var(--ease); }
.chain__grid tbody tr:hover { background: oklch(0.24 0.012 168 / 0.5); }
.chain__grid tbody tr:last-child td { border-bottom: 0; }

.chain__rank { font-family: var(--mono); color: var(--faint); font-size: 0.9rem; }
.co { display: inline-flex; align-items: center; gap: 0.65rem; }
.co strong, .co b { font-family: var(--sans); font-weight: 700; color: var(--ink); letter-spacing: -0.01em; }

/* monogram chip (text only, no images) */
.mono-chip {
  --chip: var(--panel-2);
  display: grid; place-items: center; width: 2.1rem; height: 2.1rem; flex: 0 0 auto;
  border-radius: var(--radius); font-family: var(--mono); font-weight: 600; font-size: 0.72rem;
  letter-spacing: 0.02em; color: var(--ink); background: var(--chip);
  border: 1px solid oklch(1 0 0 / 0.08); box-shadow: inset 0 1px 0 oklch(1 0 0 / 0.06);
}
.mono-chip--lg { width: 2.7rem; height: 2.7rem; font-size: 0.85rem; border-radius: var(--radius-lg); }
.mono-chip--exante { --chip: linear-gradient(160deg, var(--call-deep), oklch(0.34 0.07 150)); color: var(--ink); border-color: var(--call-deep); }

/* access tag: call vs put style */
.tag { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.03em; padding: 0.18rem 0.5rem; border-radius: 3px; white-space: nowrap; display: inline-flex; align-items: center; gap: 0.35rem; }
.tag--listed { color: var(--call-bright); background: var(--call-wash); }
.tag--derived { color: var(--put); background: var(--put-wash); }
.tag--mixed { color: var(--amber-note); background: oklch(0.80 0.11 90 / 0.12); }
.yn { font-family: var(--mono); font-size: 0.82rem; }
.yn--y { color: var(--call-bright); }
.yn--n { color: var(--put); }

.reg { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); letter-spacing: 0.02em; }

.chain__score { font-family: var(--mono); font-size: 1.05rem; font-weight: 600; color: var(--ink); }

/* lead (ITM) row */
.chain__grid tbody tr.is-lead {
  background: linear-gradient(90deg, var(--call-wash), oklch(0.72 0.15 150 / 0.03) 60%, transparent);
  box-shadow: inset 0 0 0 1px var(--call-glow);
}
.chain__grid tbody tr.is-lead:hover { background: linear-gradient(90deg, oklch(0.72 0.15 150 / 0.16), transparent); }
.chain__grid tbody tr.is-lead .chain__score { color: var(--call-bright); font-size: 1.2rem; }
.chain__grid tbody tr.is-lead .co strong { color: var(--ink); }
.itm-flag { font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.1em; color: var(--call); border: 1px solid var(--call-deep); border-radius: 3px; padding: 0.05rem 0.3rem; margin-left: 0.4rem; vertical-align: middle; }

.chain__foot { padding: 0.85rem 1rem; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 0.72rem; color: var(--faint); }
.chain__foot a { color: var(--muted); }

/* ---------- reviews ---------- */
.reviews { padding: clamp(2.5rem, 6vw, 4.5rem) 0; }
.reviews__stack { display: grid; gap: 1rem; }
.entry {
  border: 1px solid var(--line-soft); border-radius: var(--radius-lg); padding: clamp(1.1rem, 3vw, 1.8rem);
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
}
.entry--lead { border-color: var(--call-deep); box-shadow: 0 0 0 1px var(--call-glow), 0 24px 60px -40px var(--call-glow); background: linear-gradient(180deg, oklch(0.72 0.15 150 / 0.06), var(--bg-2)); }
.entry__head { display: flex; align-items: center; gap: 0.85rem; flex-wrap: wrap; }
.entry__head h3 { font-size: var(--step-1); font-weight: 800; }
.entry__for { margin: 0.15rem 0 0; font-size: 0.85rem; color: var(--muted); font-family: var(--mono); letter-spacing: 0.01em; }
.entry__rank { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); border: 1px solid var(--line); border-radius: 3px; padding: 0.25rem 0.5rem; margin-left: auto; }
.entry__score { font-family: var(--mono); text-align: right; }
.entry__score b { font-size: 1.6rem; color: var(--ink); line-height: 1; }
.entry--lead .entry__score b { color: var(--call-bright); }
.entry__score small { color: var(--faint); font-size: 0.72rem; }
.entry__verdict { margin: 1.1rem 0 0; color: var(--ink-2); max-width: 74ch; }
.entry__verdict strong { color: var(--ink); }

.entry__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem 2rem; margin-top: 1.3rem; }
@media (max-width: 680px) { .entry__grid { grid-template-columns: 1fr; } }
.entry__grid h4 { font-size: 0.72rem; font-family: var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.6rem; }
ul.ticks, ul.crosses { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
ul.ticks li, ul.crosses li { position: relative; padding-left: 1.5rem; font-size: 0.9rem; line-height: 1.45; }
ul.ticks li::before { content: "+"; position: absolute; left: 0; top: -0.05rem; font-family: var(--mono); color: var(--call-bright); font-weight: 700; }
ul.crosses li::before { content: "!"; position: absolute; left: 0.3rem; top: -0.05rem; font-family: var(--mono); color: var(--amber-note); font-weight: 700; }
ul.compact { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; list-style: none; padding: 0; }
ul.compact li { padding: 0.3rem 0.7rem; background: var(--bg); border: 1px solid var(--line-soft); border-radius: 3px; font-family: var(--mono); font-size: 0.75rem; color: var(--muted); }
ul.compact li::before { display: none; }

.scorecard { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0.9rem 1.4rem; margin: 1.5rem 0; padding: 1.2rem; background: var(--bg); border: 1px solid var(--line-soft); border-radius: var(--radius); }
.metric { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 0.3rem 0.6rem; }
.metric span { font-size: 0.8rem; color: var(--muted); }
.metric b { font-family: var(--mono); font-size: 0.9rem; color: var(--ink); text-align: right; }
.metric i { grid-column: 1 / -1; height: 5px; border-radius: 3px; background: var(--panel-2); position: relative; overflow: hidden; }
.metric i::after { content: ""; position: absolute; inset: 0; width: var(--v, 0%); border-radius: 3px; background: linear-gradient(90deg, var(--call-deep), var(--call-bright)); }

/* ---------- methodology ---------- */
.method { padding: clamp(2.5rem, 6vw, 4rem) 0; }
.method__grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(1.5rem, 4vw, 3rem); align-items: start; }
@media (max-width: 820px) { .method__grid { grid-template-columns: 1fr; } }
.criteria { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.9rem; counter-reset: c; }
.criteria li { display: grid; grid-template-columns: auto 1fr; gap: 0.4rem 0.9rem; align-items: baseline; padding: 0.95rem 1.1rem; background: var(--panel); border: 1px solid var(--line-soft); border-radius: var(--radius); }
.criteria li::before { counter-increment: c; content: counter(c, decimal-leading-zero); font-family: var(--mono); font-size: 0.75rem; color: var(--call); }
.criteria b { font-family: var(--sans); color: var(--ink); font-size: 0.92rem; display: block; }
.criteria b .wt { font-family: var(--mono); color: var(--call-bright); font-size: 0.8rem; margin-left: 0.4rem; }
.criteria span { font-size: 0.85rem; color: var(--muted); grid-column: 2; }

/* ---------- faq ---------- */
.faq { padding: clamp(2.5rem, 6vw, 4rem) 0; }
.faq__list { display: grid; gap: 0.7rem; margin-top: 1.5rem; }
.faq details { border: 1px solid var(--line-soft); border-radius: var(--radius); background: var(--panel); overflow: hidden; }
.faq summary { cursor: pointer; list-style: none; padding: 1rem 1.2rem; font-weight: 650; color: var(--ink); display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--call); font-size: 1.2rem; transition: transform 0.2s var(--ease); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0; padding: 0 1.2rem 1.2rem; color: var(--ink-2); max-width: 78ch; }
@media (prefers-reduced-motion: reduce) { .faq summary::after { transition: none; } }

/* ---------- cross-link band ---------- */
.crossband { padding: clamp(1.5rem, 4vw, 2.5rem) 0; }
.crossband__inner { display: flex; align-items: center; justify-content: space-between; gap: 1.2rem; flex-wrap: wrap; padding: clamp(1.2rem, 3vw, 1.8rem); border: 1px solid var(--line); border-radius: var(--radius-lg); background: linear-gradient(120deg, var(--panel), var(--bg-2)); }
.crossband__inner p { margin: 0; color: var(--ink-2); max-width: 60ch; }
.crossband__inner b { color: var(--ink); font-family: var(--sans); }
.crossband small { display: block; font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--call); margin-bottom: 0.3rem; }

/* ---------- footer ---------- */
.foot { border-top: 1px solid var(--line); padding: clamp(2rem, 5vw, 3rem) 0 2.5rem; margin-top: 2rem; background: oklch(0.135 0.008 165 / 0.5); }
.foot__disc { font-size: 0.82rem; color: var(--muted); max-width: 92ch; line-height: 1.6; }
.foot__disc strong { color: var(--ink-2); }
.foot__meta { margin-top: 1.2rem; padding-top: 1.2rem; border-top: 1px solid var(--line-soft); font-family: var(--mono); font-size: 0.72rem; color: var(--faint); letter-spacing: 0.02em; display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; }
.foot__meta a { color: var(--muted); }