/* ============================================================
   Options Band design system — "market ledger" identity.
   Warm ivory paper + deep ink; calls are always teal, puts are
   always vermilion (consistent across every chart and table);
   numerals in a mono face. Hairline rules, not boxes.
   ============================================================ */
:root{
  --bg:#faf8f3; --fg:#191c21; --muted:#6b7178; --line:#e3ded2; --line2:#cfc9ba;
  --surface:#f3f0e8; --header:#12151b; --header-fg:#ece9e0;
  --accent:#0f6f63;            /* interactive teal-ink */
  --call:#0e8f7c; --put:#c9472e;      /* the duality */
  --up:#0e8f7c; --down:#c9472e;
  --amber:#b98a2d; --band:rgba(185,138,45,.16);
  --chip:#ebe7db; --star:#b98a2d; --ink2:#3a3f46;
  --serif:"Spectral",Georgia,"Times New Roman",serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
[data-theme="dark"]{
  --bg:#131519; --fg:#e7e4db; --muted:#9aa0a8; --line:#2a2e35; --line2:#3a3f48;
  --surface:#1a1d23; --header:#0c0e12; --header-fg:#e7e4db;
  --accent:#3fb3a0; --call:#2fc4a8; --put:#ff7a5c; --up:#2fc4a8; --down:#ff7a5c;
  --amber:#d1a54a; --band:rgba(209,165,74,.14); --chip:#232730; --ink2:#c8ccd2;
}
*{box-sizing:border-box}
html{overflow-x:clip}
body{margin:0;font:14px/1.5 var(--sans);background:var(--bg);color:var(--fg)}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{font-family:var(--serif);letter-spacing:.1px}
h1{font-size:27px;margin:12px 0 6px;font-weight:600}
h2{font-size:19.5px;margin:26px 0 8px;font-weight:600}
h3{font-size:16px;margin:16px 0 6px;font-weight:600}
.h1sub{color:var(--muted);font-weight:400;font-size:15px;font-family:var(--sans)}
.blurb{color:var(--muted);max-width:860px}
.fineprint{color:var(--muted);font-size:12.5px}
.note-box{border-left:3px solid var(--amber);padding:10px 14px;margin:14px 0;color:var(--muted)}
.num,td.num,th.num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:12.8px}
.up{color:var(--up)} .down{color:var(--down)}
.pos{fill:var(--up)} .neg{fill:var(--put)}
.unit{color:var(--muted);font-size:12px}
.callc{color:var(--call)} .putc{color:var(--put)}

/* ---------------- header ---------------- */
.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:14px;
  background:var(--header);color:var(--header-fg);padding:0 14px;height:54px}
.burger{background:none;border:0;color:var(--header-fg);font-size:20px;cursor:pointer;display:none}
.logo-wrap{display:flex;flex-direction:column;flex:0 0 auto;min-width:auto}
.logo{color:#fff;font-family:var(--serif);font-weight:700;letter-spacing:.4px;font-size:19px;line-height:1}
.logo em{font-style:normal;color:var(--amber)}
.logo:hover{text-decoration:none}
.tagline{color:#8d94a0;font-size:10.5px;margin-top:3px;white-space:nowrap}
.mainnav{display:flex;gap:2px;margin-left:auto;align-items:center}
.dd{display:flex;align-items:center;position:relative}
.mainnav>a,.mainnav .ddbtn{color:var(--header-fg);padding:8px 9px;border-radius:6px;font-size:13.2px;white-space:nowrap}
.mainnav>a:hover,.ddbtn:hover{background:rgba(255,255,255,.08);text-decoration:none}
.ddmenu{display:none;position:absolute;top:100%;left:0;background:var(--bg);border:1px solid var(--line);
  border-radius:8px;min-width:180px;box-shadow:0 8px 24px rgba(0,0,0,.18);padding:6px 0;z-index:60}
.ddmenu.open{display:block}
.ddmenu a{display:block;padding:7px 14px;color:var(--fg)}
.ddmenu a:hover{background:var(--surface);text-decoration:none}
.searchwrap{position:relative}
.searchwrap input{background:transparent;border:0;border-bottom:1px solid #4c525c;color:var(--header-fg);
  padding:6px 4px;width:150px;outline:none;font-family:var(--mono);font-size:13px}
.searchwrap input::placeholder{color:#79808c;font-family:var(--sans)}
.searchresults{display:none;position:absolute;right:0;top:110%;width:300px;background:var(--bg);
  border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.18);overflow:hidden}
.searchresults.open{display:block}
.searchresults a{display:flex;justify-content:space-between;gap:8px;padding:8px 12px;color:var(--fg)}
.searchresults a:hover{background:var(--surface);text-decoration:none}
.searchresults .k{color:var(--muted);font-size:12px;flex:0 0 auto}
.userbtn{background:none;border:0;color:var(--header-fg);font-size:18px;cursor:pointer}
.savebtn{color:var(--star);font-size:17px;position:relative;text-decoration:none}
.savebtn:hover{text-decoration:none}
.favbadge{position:absolute;top:-7px;right:-10px;background:var(--put);color:#fff;border-radius:9px;
  font-size:10px;min-width:15px;height:15px;line-height:15px;text-align:center;padding:0 3px;font-family:var(--sans)}
.theme-toggle{font-size:17px;background:none;border:1px solid var(--line2);border-radius:50%;
  width:33px;height:33px;cursor:pointer;color:var(--header-fg)}
.offcanvas .theme-toggle{color:var(--fg)}

/* ---------------- offcanvas ---------------- */
.offcanvas{position:fixed;top:0;bottom:0;width:300px;max-width:85vw;background:var(--bg);z-index:70;
  transition:transform .22s;overflow-y:auto;padding:14px;border-right:1px solid var(--line)}
.offcanvas.left{left:0;transform:translateX(-100%)}
.offcanvas.right{right:0;left:auto;transform:translateX(100%);border-left:1px solid var(--line);border-right:0}
.offcanvas.open{transform:none}
.oc-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:60}
.oc-backdrop.open{display:block}
.oc-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.oc-close{background:none;border:0;font-size:22px;cursor:pointer;color:var(--fg)}
.oc-link{display:block;padding:9px 4px;border-bottom:1px solid var(--line);color:var(--fg);font-weight:600}
.offcanvas details{border-bottom:1px solid var(--line);padding:4px 0}
.offcanvas summary{padding:7px 4px;font-weight:600;cursor:pointer}
.offcanvas details a{display:block;padding:6px 14px;color:var(--fg)}
.oc-card{border-top:2px solid var(--line2);padding:10px 2px;margin:10px 0}
.oc-card p{margin:6px 0 0;color:var(--muted);font-size:13px}
.oc-row{display:flex;justify-content:space-between;align-items:center;padding:10px 2px}
.oc-view p{margin:8px 0;color:var(--muted);font-size:13px}

/* ---------------- layout ---------------- */
.page{max-width:1220px;margin:0 auto;padding:18px 16px 30px}
.tbtn{background:var(--accent);border:0;color:#fff;border-radius:6px;padding:8px 14px;
  cursor:pointer;font-size:13.5px;font-family:var(--sans)}
.tbtn:hover{filter:brightness(1.08)}
.tbtn.ghost{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.chip{display:inline-block;background:var(--chip);border-radius:4px;padding:2px 8px;
  font-size:11.5px;color:var(--ink2);margin:2px 4px 2px 0}
.cc{display:inline-block;background:var(--chip);border-radius:4px;padding:1px 6px;font-size:11.5px;
  margin-right:8px;color:var(--muted)}
.warn-chip{display:inline-block;border:1px solid var(--put);color:var(--put);border-radius:4px;
  padding:1px 7px;font-size:11px;margin-left:8px}
.ts{color:var(--muted);font-size:12px}
.asof{color:var(--muted);font-size:12px;font-family:var(--mono)}

/* ---------------- tables (hairline rules, name column left) -------------
   Tables HUG their content (width:auto) rather than stretching a handful of
   columns across the whole page — sparse full-width tables read as broken. */
.data-table{width:auto;min-width:min(660px,100%);border-collapse:collapse;
  margin:10px 0 18px;font-size:13.3px}
.chain-table{width:100%;min-width:0}
.data-table th{text-align:right;padding:7px 8px 7px 26px;border-bottom:2px solid var(--line2);
  cursor:pointer;white-space:nowrap;font-weight:600;font-size:12.3px;color:var(--ink2)}
.data-table td{padding:7px 8px 7px 26px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
.data-table td.namecol,.data-table th.namecol{padding-left:8px;padding-right:20px}
.chain-table th,.chain-table td{padding:6px 7px}
.data-table td.namecol,.data-table th.namecol{text-align:left}
td.namecol a{color:var(--fg)}
td.namecol b{font-weight:650}
.data-table tr:hover td{background:var(--surface)}
.favstar{background:none;border:0;cursor:pointer;color:var(--star);font-size:14px;padding:0 3px}
.table-scroll{overflow-x:auto;position:relative;
  background:linear-gradient(90deg,var(--bg) 20px,transparent 60px) left/60px 100% no-repeat local,
             linear-gradient(270deg,var(--bg) 20px,transparent 60px) right/60px 100% no-repeat local,
             linear-gradient(90deg,rgba(0,0,0,.14),transparent 16px) left/16px 100% no-repeat scroll,
             linear-gradient(270deg,rgba(0,0,0,.14),transparent 16px) right/16px 100% no-repeat scroll}
.table-scroll table{margin:0}

/* ---------------- hero / home ---------------- */
.hero{position:relative;margin:0 calc(50% - 50vw) 20px;padding:52px 16px 58px;color:#fff;
  background:#12151b center/cover no-repeat;min-height:290px;display:flex;align-items:center}
.hero::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,12,17,.55) 0%,rgba(10,12,17,.35) 45%,var(--bg) 100%)}
.hero-inner{position:relative;z-index:1;max-width:1220px;margin:0 auto;width:100%;padding:0 16px}
.hero h1{color:#fff;font-size:clamp(28px,4.4vw,44px);margin:0 0 10px;text-shadow:0 2px 14px rgba(0,0,0,.5)}
.hero p{color:#e4e1d7;font-size:16.5px;max-width:640px;margin:0 0 18px;text-shadow:0 1px 8px rgba(0,0,0,.55)}
.hero-search{display:flex;max-width:520px;position:relative}
.hero-search input{flex:1;min-width:0;padding:13px 16px;font-size:16px;border:0;border-radius:8px 0 0 8px;
  font-family:var(--mono);background:#fdfcf9;color:#16181d}
.hero-search .tbtn{border-radius:0 8px 8px 0;font-size:15px;padding:0 20px}
.trust-strip{display:flex;gap:26px;flex-wrap:wrap;margin:16px 0 4px;color:#cfd4cd;font-size:13px;
  position:relative;z-index:1}
.trust-strip b{color:#fff;font-family:var(--mono);font-size:15px}

/* ticker tape */
.tape{margin:0 calc(50% - 50vw) 18px;background:var(--header);color:#d8d5cb;overflow:hidden;
  border-bottom:1px solid rgba(255,255,255,.06);white-space:nowrap;font-family:var(--mono);font-size:12.3px}
.tape-inner{display:inline-block;padding:7px 0;animation:tape 80s linear infinite}
.tape a{color:#d8d5cb;margin:0 16px}
.tape a:hover{color:#fff;text-decoration:none}
.tape .em{color:var(--amber)}
@keyframes tape{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media (prefers-reduced-motion: reduce){.tape-inner{animation:none}}

/* stat rows (no boxes: rules) */
.stat-row{display:flex;flex-wrap:wrap;gap:0 34px;border-top:2px solid var(--line2);
  border-bottom:1px solid var(--line);padding:12px 2px;margin:12px 0 16px}
.stat{padding:4px 0;min-width:110px}
.stat .k{color:var(--muted);font-size:11.6px;display:block}
.stat .v{font-family:var(--mono);font-size:17px;font-weight:600}
.stat .v small{font-size:12px;color:var(--muted);font-weight:400}

/* module sections */
.mod{margin:26px 0}
.mod-head{display:flex;align-items:flex-end;gap:12px;border-bottom:2px solid var(--line2);padding-bottom:6px}
.mod-head h2{margin:0;border:0}
.mod-head .more{margin-left:auto;font-size:13px;white-space:nowrap;padding-bottom:3px}
/* table-only modules shrink to their table so every rule shares ONE edge —
   a full-width rule over a content-width table reads as misaligned */
.mod.hug{width:max-content;max-width:100%;min-width:0}
.mod.hug .mod-head{border-bottom:0;padding-bottom:0}
.mod.hug .data-table{margin-top:6px;width:100%}  /* sibling tables share one edge */
/* prose inside a hugged module must not drive its width (a paragraph's
   max-content is its full unwrapped line) — width comes from the table */
.mod.hug .guide-help,.mod.hug .note-box,.mod.hug .fineprint,.mod.hug .blurb{
  width:0;min-width:100%}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:26px;align-items:start}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;align-items:start}
.grid2>*,.grid3>*{min-width:0}
.home-cols{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:30px;align-items:start}
.home-cols>*{min-width:0}

/* guided view + tooltips */
.guide-help{display:none;color:var(--muted);font-size:13px;border-left:3px solid var(--amber);
  padding:6px 12px;margin:8px 0}
body.guided .guide-help{display:block}
.tip{position:relative;cursor:help;border-bottom:1px dotted var(--muted)}
.tip .tipbox{display:none;position:absolute;bottom:125%;left:50%;transform:translateX(-50%);
  width:270px;background:var(--header);color:#e8e5dc;font-size:12.3px;line-height:1.45;
  padding:10px 12px;border-radius:8px;z-index:40;white-space:normal;text-align:left;font-family:var(--sans);font-weight:400}
.tip:hover .tipbox,.tip:focus .tipbox{display:block}

/* ---------------- charts (inline SVG) ---------------- */
.ch{display:block;width:100%;height:auto;max-width:100%}
.ch .ax{stroke:var(--line2);stroke-width:1}
.ch .grid{stroke:var(--line);stroke-width:1}
.ch .band{fill:var(--band)}
.ch .curve{stroke:var(--accent);stroke-width:2}
.ch .mark{stroke:var(--muted);stroke-width:1.5}
.ch .mark.spot{stroke:var(--fg);stroke-width:2}
.ch .mark.lo,.ch .mark.hi{stroke:var(--amber);stroke-width:1.6}
.ch .mark.strike{stroke:var(--put);stroke-width:1.6}
.ch .mark.dash{stroke-dasharray:4 3}
.ch .lbl{fill:var(--muted);font-size:11.5px;font-family:var(--mono)}
.ch .lbl.sm{font-size:10.3px}
.ch .lbl.strong{fill:var(--fg);font-weight:600}
.ch .bc{fill:var(--call)} .ch .bp{fill:var(--put)}
.ch .ba{fill:var(--band);stroke:var(--amber);stroke-width:1}
.ch .bb{fill:var(--accent)}
.ch .ln{stroke-width:2;fill:none}
.ch .ln.l0{stroke:var(--accent)} .ch .ln.l1{stroke:var(--amber)}
.ch .dot{fill:var(--accent)}
.ch .onseg{fill:#fff;font-size:11px}
.ch .seg.s0{fill:var(--accent)} .ch .seg.s1{fill:var(--call)}
.ch .seg.s2{fill:var(--amber)} .ch .seg.s3{fill:var(--muted)}
.spark{width:120px;height:34px}
.spark polyline{stroke-width:1.6}
.spark-up{stroke:var(--up)} .spark-down{stroke:var(--down)}
.legend{display:flex;gap:18px;font-size:12px;color:var(--muted);margin:2px 0 6px;flex-wrap:wrap}
.legend .sw{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:5px;vertical-align:-1px}
.sw.c-call{background:var(--call)} .sw.c-put{background:var(--put)}
.sw.c-acc{background:var(--accent)} .sw.c-amb{background:var(--amber)}
.sw.c-band{background:var(--band);border:1px solid var(--amber)}

/* treemap: IV heat scale (cool teal-grays -> hot vermilion) */
.tm .tile{stroke:var(--bg);stroke-width:1}
.tm .tile.q0{fill:#5c8a83}.tm .tile.q1{fill:#7a9187}.tm .tile.q2{fill:#a68a58}
.tm .tile.q3{fill:#bf6f40}.tm .tile.q4{fill:#c9472e}
[data-theme="dark"] .tm .tile.q0{fill:#3d6b64}[data-theme="dark"] .tm .tile.q1{fill:#5a7268}
[data-theme="dark"] .tm .tile.q2{fill:#8a7346}[data-theme="dark"] .tm .tile.q3{fill:#a35a32}
[data-theme="dark"] .tm .tile.q4{fill:#b8452c}
.tm-lbl{fill:#fff;font-weight:700;font-family:var(--mono)}
.tm-sub{fill:rgba(255,255,255,.85);font-family:var(--mono)}
.tm a:hover .tile{filter:brightness(1.12)}

/* probability explorer */
.prob-panel{border-top:2px solid var(--line2);padding-top:10px}
.prob-slider{width:100%;accent-color:var(--accent);margin:12px 0 4px}
.prob-nums{display:flex;gap:0 34px;flex-wrap:wrap}

/* option chain */
.chain-table th.adv,.chain-table td.adv{display:none}
body.chain-advanced .chain-table th.adv,body.chain-advanced .chain-table td.adv{display:table-cell}
.chain-table td.strikecol,.chain-table th.strikecol{background:var(--surface);font-weight:700;
  text-align:center;border-left:1px solid var(--line2);border-right:1px solid var(--line2)}
.chain-table tr.atm td{border-top:2px solid var(--amber)}
.chain-side{font-size:11px;color:var(--muted);letter-spacing:1.5px}
.exp-nav{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:10px 0}
.exp-nav select{padding:7px 10px;border:1px solid var(--line2);border-radius:6px;background:var(--bg);
  color:var(--fg);font-family:var(--mono);min-width:0}

/* news / cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.news-card{border-top:2px solid var(--line2);padding:10px 2px}
.news-card h3{margin:0 0 6px;font-size:14.5px;font-family:var(--sans);font-weight:650}
.news-card p{margin:0 0 6px;color:var(--muted);font-size:13px}
.news-card img{width:100%;height:130px;object-fit:cover;border-radius:6px;margin-bottom:8px}
.brief-item{border-left:3px solid var(--accent);padding:8px 12px;margin:12px 0}
.brief-item h3{margin:0 0 4px;font-size:14.5px;font-family:var(--sans)}
.brief-item p{margin:0;color:var(--muted);font-size:13px}

/* learn */
.learn-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.learn-card{border-top:2px solid var(--line2);padding:12px 2px;display:block;color:var(--fg)}
a.learn-card:hover{text-decoration:none;background:var(--surface)}
.learn-card h3{margin:0 0 6px}
.learn-card p{margin:0;color:var(--muted);font-size:13px}
.learn-card.hasimg{padding:0;border-top:0}
.learn-card.hasimg img{width:100%;height:140px;object-fit:cover;border-radius:8px}
.learn-card.hasimg .lc-body{padding:10px 2px;border-top:2px solid var(--line2);margin-top:-4px}
.level-tabs{display:flex;gap:10px;border-bottom:2px solid var(--line2);margin:16px 0 0}
.level-tabs a{padding:8px 4px;color:var(--muted);font-weight:600;font-size:13.5px}
.depth h2{border-bottom:1px solid var(--line);padding-bottom:4px}
.depth p,.legalpage p{max-width:820px}
.formula{font-family:var(--mono);background:var(--surface);padding:10px 14px;border-radius:6px;
  overflow-x:auto;font-size:13px}
.formula-inline{font-family:var(--mono);font-size:12.6px}
.banner{position:relative;margin:0 0 18px;border-radius:10px;overflow:hidden;min-height:150px;
  background:#12151b center/cover no-repeat;display:flex;align-items:flex-end}
.banner .bt{position:relative;z-index:1;color:#fff;padding:16px;font-family:var(--serif);
  font-size:clamp(20px,3vw,30px);font-weight:600;text-shadow:0 2px 10px rgba(0,0,0,.6)}
.banner::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,10,14,.1),rgba(8,10,14,.62))}

/* ask */
.ask-box{display:flex;gap:0;max-width:640px;margin:14px 0}
.ask-box input{flex:1;padding:12px 14px;font-size:16px;border:1px solid var(--line2);
  border-radius:8px 0 0 8px;background:var(--bg);color:var(--fg)}
.ask-box .tbtn{border-radius:0 8px 8px 0}
.ask-out{border-left:3px solid var(--accent);padding:12px 16px;margin:14px 0;max-width:640px}
.ask-links{margin-top:8px}
.prompt-card{position:relative}
.prompt-text{background:var(--surface);border-radius:8px;padding:12px;font-size:12.3px;
  font-family:var(--mono);white-space:pre-wrap;overflow-x:auto;max-height:260px;overflow-y:auto}
.copybtn{margin-top:8px}

/* contact + forms */
.contact-form{max-width:520px;display:flex;flex-direction:column;gap:10px}
.contact-form input,.contact-form textarea{padding:10px;border:1px solid var(--line2);
  border-radius:6px;background:var(--bg);color:var(--fg);font-family:var(--sans);font-size:16px}
.hp{position:absolute;left:-9999px}
.screen-form{display:flex;flex-wrap:wrap;gap:10px 14px;border-top:2px solid var(--line2);
  border-bottom:1px solid var(--line);padding:12px 0;margin:10px 0 14px;align-items:end}
.screen-form label{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--muted);min-width:0}
.screen-form input,.screen-form select{padding:8px;border:1px solid var(--line2);border-radius:6px;
  background:var(--bg);color:var(--fg);width:110px;font-family:var(--mono);min-width:0;font-size:16px}
.screen-form select{width:auto}
.preset-row{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0}

/* ---------------- footer ---------------- */
.megafooter{background:var(--surface);border-top:1px solid var(--line);margin-top:34px;
  padding:22px 16px;display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px}
.mf-col h2{font-size:13px;margin:0 0 8px;font-family:var(--sans)}
.mf-col a{display:block;color:var(--muted);font-size:12.3px;padding:2px 0}
.footer{background:var(--header);color:#a7adb8;padding:26px 16px;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:18px}
.footer a{color:#c9cdd6}
.f-col b{color:#e8e5dc;display:block;margin-bottom:8px}
.f-col a{display:block;padding:2.5px 0;font-size:13px}
.f-family{grid-column:1/-1;border-top:1px solid #262b34;padding-top:14px;font-size:13px}
.f-sub{grid-column:1/-1;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.f-sub input{padding:9px 12px;border-radius:6px;border:1px solid #3a4048;background:#191d24;
  color:#e8e5dc;min-width:230px;font-size:16px}
.f-langs select{background:#191d24;color:#e8e5dc;border:1px solid #3a4048;border-radius:6px;padding:7px}
.lang-sel{background:var(--bg);color:var(--fg);border:1px solid var(--line2);border-radius:6px;padding:7px;font-size:16px}
.f-legal{grid-column:1/-1;border-top:1px solid #262b34;padding-top:14px;font-size:12px;
  color:#8d939e;line-height:1.55}
.f-legal a{color:#aab0ba}

/* ---------------- mobile ---------------- */
@media (max-width: 1140px){
  .mainnav>a.n2,.tagline{display:none}
}
@media (max-width: 950px){
  .mod.hug{width:auto}
  .grid2,.grid3,.home-cols{grid-template-columns:1fr}
  .hero{min-height:230px;padding:38px 16px 46px}
}
@media (max-width: 719px){
  .navbar{display:none}
  .burger{display:block}
}
@media (max-width: 640px){
  .page{padding:14px 10px 24px}
  .searchwrap input{width:96px}
  .topbar{gap:8px;padding:0 8px}
  .logo{font-size:17px}
  .stat{min-width:96px}
  .stat .v{font-size:15px}
  input,select,textarea,.searchwrap input,.hero-search input,.ask-box input,
  .screen-form input,.screen-form select,.f-sub input{font-size:16px}
  .data-table{font-size:12.4px}
  .data-table .mobile-hide{display:none}
  .chain-table th.adv,.chain-table td.adv{display:none !important}
}
@media (max-width: 380px){
  .topbar{gap:5px;padding:0 6px}
  .searchwrap{flex:1 1 56px;min-width:0}
  .searchwrap input{width:100%;min-width:0}
  .searchresults{width:270px}
  .theme-toggle{width:29px;height:29px;font-size:14px}
  .userbtn{font-size:15px}
  .logo{font-size:16px}
}

/* ================= Learn: course experience ================= */
.course-intro{display:flex;gap:26px;align-items:center;flex-wrap:wrap;margin:6px 0 10px}
.course-intro .blurb{flex:1 1 380px;margin:0}
.progress-wrap{flex:0 1 300px;min-width:220px}
.progress-label{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted);margin-bottom:5px}
.progress-bar{height:10px;border-radius:6px;background:var(--chip);overflow:hidden}
.progress-bar i{display:block;height:100%;width:0;border-radius:6px;
  background:linear-gradient(90deg,var(--accent),var(--amber));transition:width .8s cubic-bezier(.22,1,.36,1)}

/* the path */
.course-path{position:relative;margin:18px 0 8px;padding-left:8px}
.cunit{position:relative;display:grid;grid-template-columns:56px minmax(0,1fr);gap:0 18px;padding:0 0 30px}
.cunit::before{content:"";position:absolute;left:35px;top:56px;bottom:-4px;width:2px;
  background:repeating-linear-gradient(180deg,var(--line2) 0 6px,transparent 6px 12px)}
.cunit:last-child::before{display:none}
.cunit-no{width:56px;height:56px;border-radius:50%;background:var(--header);color:var(--amber);
  font-family:var(--serif);font-size:23px;font-weight:700;display:flex;align-items:center;
  justify-content:center;border:2px solid var(--amber);position:relative;z-index:1;
  transition:transform .25s, box-shadow .25s}
.cunit.done .cunit-no{background:var(--accent);border-color:var(--accent);color:#fff}
.cunit.done .cunit-no::after{content:"✓";position:absolute;right:-4px;top:-4px;width:20px;height:20px;
  border-radius:50%;background:var(--amber);color:#12151b;font-size:13px;font-family:var(--sans);
  display:flex;align-items:center;justify-content:center}
.cunit:hover .cunit-no{transform:scale(1.08);box-shadow:0 4px 18px rgba(0,0,0,.25)}
.cunit-card{display:grid;grid-template-columns:190px minmax(0,1fr);gap:18px;align-items:start;
  border-top:2px solid var(--line2);padding-top:12px;min-width:0}
.cunit-card img{width:190px;height:120px;object-fit:cover;border-radius:9px;
  transition:transform .35s}
.cunit:hover .cunit-card img{transform:scale(1.03)}
.cunit-body{min-width:0}
.cunit-body h2{margin:0 0 4px}
.cunit-meta{color:var(--muted);font-size:12.5px;margin:0 0 8px}
.lesson-list{display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:0;list-style:none}
.lesson-list a{display:inline-flex;align-items:center;gap:6px;background:var(--chip);
  border-radius:20px;padding:6px 13px;font-size:13px;color:var(--fg);
  transition:transform .18s, background .18s}
.lesson-list a:hover{transform:translateY(-2px);background:var(--surface);text-decoration:none}
.lesson-list a .tick{width:16px;height:16px;border-radius:50%;border:1.5px solid var(--line2);
  display:inline-flex;align-items:center;justify-content:center;font-size:10px;color:transparent;
  transition:all .25s;flex:0 0 auto}
.lesson-list a.read .tick{background:var(--accent);border-color:var(--accent);color:#fff}
.lesson-list a.read{color:var(--muted)}

/* flashcards */
.fc-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.fc{perspective:900px;cursor:pointer;height:170px;border:0;background:none;padding:0;text-align:left;
  font:inherit;color:inherit}
.fc-inner{position:relative;width:100%;height:100%;transition:transform .55s;transform-style:preserve-3d}
.fc.flipped .fc-inner{transform:rotateY(180deg)}
.fc-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:10px;padding:16px;
  display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center}
.fc-front{background:var(--header);color:#ece9e0}
.fc-front b{font-family:var(--serif);font-size:19px}
.fc-front span{color:var(--amber);font-size:11.5px;margin-top:10px;letter-spacing:.6px}
.fc-back{background:var(--surface);border:1px solid var(--line);transform:rotateY(180deg);
  font-size:12.3px;line-height:1.45;color:var(--ink2);justify-content:flex-start;overflow-y:auto;text-align:left}
@media (prefers-reduced-motion: reduce){
  .fc-inner{transition:none}
  .fc.flipped .fc-inner{transform:none}
  .fc.flipped .fc-front{visibility:hidden}
}

/* payoff playground */
.playground{border-top:2px solid var(--line2);padding-top:12px}
.pg-controls{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:8px 0}
.pg-toggle{display:inline-flex;border:1px solid var(--line2);border-radius:8px;overflow:hidden}
.pg-toggle button{background:var(--bg);border:0;padding:8px 16px;cursor:pointer;color:var(--fg);
  font:inherit;font-size:13.5px;transition:background .2s}
.pg-toggle button.cur{background:var(--accent);color:#fff}
.pg-read{font-size:14px;margin:8px 0;min-height:42px}
.pg-read b{font-family:var(--mono)}
.pg-pl-pos{color:var(--up)} .pg-pl-neg{color:var(--down)}
#pgSlider{width:100%;max-width:640px;accent-color:var(--accent)}
.pg-svg .payoff{stroke-width:2.6;fill:none}
.pg-svg .payoff.c{stroke:var(--call)} .pg-svg .payoff.p{stroke:var(--put)}
.pg-svg .zone-win{fill:rgba(14,143,124,.12)} .pg-svg .zone-lose{fill:rgba(201,71,46,.10)}
.pg-svg .dotline{stroke:var(--muted);stroke-dasharray:4 3;stroke-width:1.4}
.pg-svg .pricedot{fill:var(--amber);stroke:var(--bg);stroke-width:2}

/* quiz */
.quiz{border-top:2px solid var(--line2);padding-top:12px;max-width:760px}
.quiz-q{font-size:16.5px;font-family:var(--serif);font-weight:600;margin:8px 0 12px}
.quiz-opts{display:flex;flex-direction:column;gap:9px}
.quiz-opts button{text-align:left;background:var(--surface);border:1px solid var(--line);
  border-radius:9px;padding:12px 15px;cursor:pointer;font:inherit;font-size:14px;color:var(--fg);
  transition:transform .16s, border-color .16s}
.quiz-opts button:hover:not(:disabled){transform:translateX(4px);border-color:var(--accent)}
.quiz-opts button.right{border-color:var(--up);background:rgba(14,143,124,.12);animation:qpulse .5s}
.quiz-opts button.wrong{border-color:var(--down);background:rgba(201,71,46,.10);animation:qshake .4s}
.quiz-explain{border-left:3px solid var(--amber);padding:8px 12px;margin:12px 0;color:var(--muted);font-size:13.5px}
.quiz-meta{display:flex;justify-content:space-between;align-items:center;margin-top:12px}
.quiz-score{font-family:var(--serif);font-size:22px}
.quiz-dots{display:flex;gap:6px}
.quiz-dots i{width:9px;height:9px;border-radius:50%;background:var(--chip);transition:background .3s}
.quiz-dots i.hit{background:var(--up)} .quiz-dots i.miss{background:var(--down)}
@keyframes qpulse{0%{transform:scale(1)}40%{transform:scale(1.02)}100%{transform:scale(1)}}
@keyframes qshake{0%,100%{transform:translateX(0)}25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
@media (prefers-reduced-motion: reduce){
  .quiz-opts button.right,.quiz-opts button.wrong{animation:none}
}

/* lesson page course chrome */
.lesson-nav{display:flex;justify-content:space-between;gap:12px;border-top:2px solid var(--line2);
  padding-top:14px;margin-top:26px;flex-wrap:wrap}
.lesson-nav a{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600}
.lesson-nav .arrow{transition:transform .2s;display:inline-block}
.lesson-nav a:hover{text-decoration:none}
.lesson-nav a:hover .arrow.r{transform:translateX(4px)}
.lesson-nav a:hover .arrow.l{transform:translateX(-4px)}
.lesson-pos{color:var(--muted);font-size:12.5px}

/* scroll-in reveal (decorative; off under reduced motion) */
@media (prefers-reduced-motion: no-preference){
  .reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease, transform .5s ease}
  .reveal.in{opacity:1;transform:none}
}

@media (max-width: 700px){
  .cunit{grid-template-columns:40px minmax(0,1fr);gap:0 12px}
  .cunit-no{width:40px;height:40px;font-size:17px}
  .cunit::before{left:27px;top:40px}
  .cunit-card{grid-template-columns:1fr}
  .cunit-card img{width:100%;height:130px}
  .fc{height:185px}
}

/* ================= editorial redesign layer ================= */
/* two-tier header: section bar under the masthead */
.navbar{background:var(--surface);border-bottom:1px solid var(--line2)}
.navbar-inner{max-width:1220px;margin:0 auto;padding:0 16px;display:flex;gap:2px}
.navbar a{padding:10px 11px;color:var(--ink2);font-size:13.4px;font-weight:600;
  white-space:nowrap;border-bottom:2.5px solid transparent;margin-bottom:-1px}
.navbar a:hover{color:var(--fg);text-decoration:none}
.navbar a.cur{color:var(--accent);border-bottom-color:var(--accent)}
.navbar .dd{margin-left:auto}
.navbar .ddbtn{padding:10px 11px;color:var(--ink2);font-size:13.4px;font-weight:600;white-space:nowrap}
.navbar .ddmenu{left:auto;right:0}
@media (max-width: 999px){
  .navbar .dd{display:none}
  .navbar-inner{overflow-x:auto;scrollbar-width:none}
  .navbar-inner::-webkit-scrollbar{display:none}
}

/* symbol logos (vendor images; onerror-removed when absent) */
.slogo{width:20px;height:20px;border-radius:5px;object-fit:contain;background:#fff;
  padding:1.5px;border:1px solid var(--line);flex:0 0 auto}
td.namecol a{display:flex;align-items:center;gap:9px;min-width:0}
.nc-txt{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.stock-h1{display:flex;align-items:center;gap:13px;flex-wrap:wrap}
.stock-h1 .slogo{width:40px;height:40px;border-radius:9px;padding:3px}

/* eyebrow kicker above section titles */
.kick{display:block;font-size:10.8px;font-weight:700;letter-spacing:1.7px;
  text-transform:uppercase;color:var(--amber);font-family:var(--sans);margin-bottom:2px}

/* main + right-rail editorial grid */
.layout-rail{display:grid;grid-template-columns:minmax(0,1fr) 348px;gap:34px;align-items:start}
.main-col{min-width:0}
.rail{min-width:0}
.rail .mod{background:var(--surface);border:1px solid var(--line);border-radius:10px;
  padding:14px 16px 10px;margin:0 0 20px}
.rail .mod-head{border-bottom:1px solid var(--line2);padding-bottom:7px}
.rail .mod-head h2{font-size:16.5px}
.rail .data-table{width:100%;min-width:0;font-size:12.6px;margin:6px 0 8px}
.rail .data-table th,.rail .data-table td{padding:6px 2px 6px 12px}
.rail .data-table td.namecol,.rail .data-table th.namecol{padding-left:0;padding-right:8px}
.rail .brief-item{margin:10px 0}
@media (max-width: 1000px){
  .layout-rail{grid-template-columns:1fr}
  .rail .mod{background:none;border:0;border-radius:0;padding:0}
}

/* full-bleed dark data band */
.band-dark{margin:28px calc(50% - 50vw);background:var(--header);color:#d9d6cc;
  padding:30px 16px 24px}
.band-inner{max-width:1220px;margin:0 auto}
.band-dark h2{color:#f2efe6;margin:0}
.band-dark .mod-head{border-bottom-color:#2c313b}
.band-dark .asof,.band-dark .fineprint{color:#8d93a0}
.band-dark .guide-help{color:#9aa0ab}
.band-dark .tm .tile{stroke:#12151b}

/* image CTA card (rail) */
.cta-card{position:relative;border-radius:10px;overflow:hidden;display:block;
  min-height:170px;background:#12151b center/cover no-repeat;color:#fff;margin:0 0 20px}
.cta-card::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,10,14,.1) 20%,rgba(8,10,14,.78))}
.cta-card .cc-body{position:absolute;left:0;right:0;bottom:0;z-index:1;padding:14px 16px}
.cta-card h3{margin:0 0 4px;color:#fff;font-size:18px}
.cta-card p{margin:0;color:#d5d2c8;font-size:12.8px}
.cta-card:hover{text-decoration:none}
.cta-card:hover h3{text-decoration:underline}

/* rail refinements: symbol-only names, no bleed past the panel edge */
.rail .mod{overflow:hidden}
.rail .nc-txt .unit{display:none}
.rail .data-table th:last-child,.rail .data-table td:last-child{padding-right:2px}