/* TradingFellows · ui.css
   One design system for the public site and the Hub.
   Idiom: iOS. System type, grouped inset lists, hairline separators,
   one accent, soft depth, spring motion. No gradients on surfaces, no glow. */

:root{
  --font:"Plus Jakarta Sans",-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;

  /* radii */
  --r-xl:28px; --r-lg:20px; --r-md:14px; --r-sm:10px; --r-pill:999px;

  /* motion */
  --ease:cubic-bezier(.32,.72,0,1);
  --dur:.32s;

  /* layout */
  --mw:1120px; --gutter:20px; --nav-h:56px; --tab-h:64px;

  /* light */
  --bg:#f2f2f7;          /* grouped background */
  --bg-el:#ffffff;       /* elevated / card */
  --bg-el2:#f7f7fa;      /* secondary fill inside cards */
  --fill:rgba(120,120,128,.12);
  --fill-2:rgba(120,120,128,.20);
  --sep:rgba(60,60,67,.18);
  --sep-strong:rgba(60,60,67,.32);
  --label:#1c1c1e;
  --label-2:#6e6e73;
  --label-3:#8e8e93;
  --label-4:#aeaeb2;
  --accent:#0f8a6c;
  --accent-2:#19b48c;
  --accent-ink:#ffffff;
  --accent-soft:rgba(15,138,108,.12);
  --mk:rgba(15,138,108,.18);
  --blue:#0a7aff; --green:#34c759; --orange:#ff9500; --red:#ff3b30; --purple:#af52de; --teal:#30b0c7;
  --green-soft:rgba(52,199,89,.14); --orange-soft:rgba(255,149,0,.14); --red-soft:rgba(255,59,48,.12); --blue-soft:rgba(10,122,255,.12);
  --nav-bg:rgba(242,242,247,.78);
  --shadow-sm:0 1px 2px rgba(0,0,0,.04),0 1px 1px rgba(0,0,0,.02);
  --shadow:0 1px 2px rgba(0,0,0,.04),0 12px 32px rgba(0,0,0,.06);
  --shadow-lg:0 2px 6px rgba(0,0,0,.05),0 24px 64px rgba(0,0,0,.12);
  --sheet-scrim:rgba(0,0,0,.28);
  color-scheme:light;
}
html[data-theme="dark"]{
  --bg:#000000;
  --bg-el:#1c1c1e;
  --bg-el2:#2c2c2e;
  --fill:rgba(120,120,128,.24);
  --fill-2:rgba(120,120,128,.36);
  --sep:rgba(84,84,88,.48);
  --sep-strong:rgba(84,84,88,.75);
  --label:#f5f5f7;
  --label-2:#a1a1a6;
  --label-3:#8e8e93;
  --label-4:#636366;
  --accent:#32d1a4;
  --accent-2:#6cf0c8;
  --accent-ink:#04231b;
  --accent-soft:rgba(50,209,164,.16);
  --mk:rgba(50,209,164,.22);
  --blue:#0a84ff; --green:#30d158; --orange:#ff9f0a; --red:#ff453a; --purple:#bf5af2; --teal:#40c8e0;
  --green-soft:rgba(48,209,88,.18); --orange-soft:rgba(255,159,10,.18); --red-soft:rgba(255,69,58,.16); --blue-soft:rgba(10,132,255,.18);
  --nav-bg:rgba(0,0,0,.72);
  --shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow:0 1px 2px rgba(0,0,0,.5),0 12px 32px rgba(0,0,0,.45);
  --shadow-lg:0 2px 6px rgba(0,0,0,.5),0 24px 64px rgba(0,0,0,.6);
  --sheet-scrim:rgba(0,0,0,.55);
  color-scheme:dark;
}

/* ─ Reset ─ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--label);font-family:var(--font);font-size:17px;line-height:1.47;letter-spacing:0;word-spacing:.04em;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;min-height:100dvh}
img,svg{display:block;max-width:100%}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none;padding:0;-webkit-tap-highlight-color:transparent}
input,select,textarea{font:inherit;color:inherit}
::selection{background:var(--accent-soft)}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px;border-radius:6px}
[hidden]{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* ─ Type ─ */
.lt{font-size:34px;line-height:1.08;font-weight:800;letter-spacing:-.04em;margin:0}
.t1{font-size:28px;line-height:1.15;font-weight:800;letter-spacing:-.035em;margin:0}
.t2{font-size:22px;line-height:1.2;font-weight:700;letter-spacing:-.025em;margin:0}
.t3{font-size:17px;line-height:1.3;font-weight:600;margin:0}
.body{font-size:17px}
.callout{font-size:16px}
.sub{font-size:15px;color:var(--label-2)}
.fn{font-size:13px;color:var(--label-3);letter-spacing:-.005em}
.cap{font-family:var(--mono);font-size:11px;color:var(--label-3);text-transform:uppercase;letter-spacing:.12em;font-weight:500}
.cap.ac{color:var(--accent)}
.mono{font-family:var(--mono);letter-spacing:0}
.muted{color:var(--label-2)}
.dim{color:var(--label-3)}
.hero-h{font-size:clamp(40px,7vw,72px);line-height:1.03;font-weight:800;letter-spacing:-.05em;margin:0;overflow-wrap:break-word}
.hero-p{font-size:clamp(18px,2.2vw,22px);line-height:1.4;color:var(--label-2);margin:0;letter-spacing:-.005em}
@media (min-width:768px){.lt{font-size:40px}}

/* ─ Layout ─ */
.wrap{max-width:var(--mw);margin:0 auto;padding:0 var(--gutter)}
.wrap-n{max-width:720px;margin:0 auto;padding:0 var(--gutter)}
.sec{padding:72px 0}
@media (min-width:768px){.sec{padding:110px 0}}
.stack{display:grid;gap:14px}
.row{display:flex;align-items:center;gap:10px}
.between{display:flex;align-items:center;justify-content:space-between;gap:12px}
.grid2{display:grid;gap:14px}
.grid3{display:grid;gap:14px}
@media (min-width:720px){.grid2{grid-template-columns:1fr 1fr}.grid3{grid-template-columns:repeat(3,1fr)}}

/* ─ Frosted nav ─ */
.nav{position:sticky;top:0;z-index:50;height:var(--nav-h);background:var(--nav-bg);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--sep)}
.nav-in{height:100%;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:-.02em;color:var(--label);font-size:17px}
.brand:hover{text-decoration:none}
.brand img{width:26px;height:26px;border-radius:7px}
html[data-theme="dark"] .brand img,html[data-theme="dark"] .foot img,html[data-theme="dark"] .auth img{filter:invert(1)}
.nav-links{display:none;gap:4px}
.nav-links a{color:var(--label-2);font-size:15px;font-weight:500;padding:7px 12px;border-radius:var(--r-pill);transition:background var(--dur) var(--ease),color var(--dur) var(--ease)}
.nav-links a:hover{background:var(--fill);color:var(--label);text-decoration:none}
.nav-links a.on{color:var(--label);background:var(--fill)}
@media (min-width:860px){.nav-links{display:flex}}
.nav-r{display:flex;align-items:center;gap:8px}

/* ─ Buttons ─ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:var(--r-pill);font-size:16px;font-weight:600;letter-spacing:-.01em;transition:transform .18s var(--ease),background var(--dur) var(--ease),opacity var(--dur),box-shadow var(--dur) var(--ease);white-space:nowrap;text-decoration:none!important;user-select:none}
.btn:active{transform:scale(.97)}
.btn[disabled]{opacity:.45;pointer-events:none}
.btn-p{background:var(--accent);color:var(--accent-ink)}
.btn-p:hover{filter:brightness(1.06)}
.btn-s{background:var(--fill);color:var(--label)}
.btn-s:hover{background:var(--fill-2)}
.btn-ink{background:var(--label);color:var(--bg-el)}
.btn-ghost{background:transparent;color:var(--accent);padding:0 10px;min-height:36px}
.btn-danger{background:var(--red-soft);color:var(--red)}
.btn-sm{min-height:34px;padding:0 14px;font-size:14px}
.btn-lg{min-height:52px;padding:0 26px;font-size:17px}
.btn-block{width:100%}
.btn svg{width:18px;height:18px;flex:none}
.icon-btn{width:38px;height:38px;border-radius:50%;display:inline-grid;place-items:center;background:var(--fill);color:var(--label);transition:background var(--dur) var(--ease),transform .18s var(--ease)}
.icon-btn:hover{background:var(--fill-2)}
.icon-btn:active{transform:scale(.94)}
.icon-btn svg{width:18px;height:18px}

/* ─ Cards ─ */
.card{background:var(--bg-el);border-radius:var(--r-lg);box-shadow:var(--shadow-sm);padding:20px}
.card-lg{padding:28px;border-radius:var(--r-xl)}
.card-h{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.card-flat{box-shadow:none;border:1px solid var(--sep)}
.card.lift{transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.card.lift:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
@media (max-width:600px){.card{padding:18px}.card-lg{padding:22px}}

/* ─ Grouped inset list (iOS Settings) ─ */
.group-h{padding:0 16px 8px;font-size:13px;color:var(--label-3);text-transform:uppercase;letter-spacing:.06em;font-weight:600}
.group-f{padding:8px 16px 0;font-size:13px;color:var(--label-3);line-height:1.45}
.list{background:var(--bg-el);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-sm)}
.li{display:flex;align-items:center;gap:14px;min-height:56px;padding:12px 16px;position:relative;width:100%;text-align:left;color:inherit;text-decoration:none!important;transition:background .15s}
.li + .li::before{content:"";position:absolute;left:62px;right:0;top:0;height:1px;background:var(--sep)}
.li.no-ic + .li.no-ic::before{left:16px}
.li.tap:hover{background:var(--fill)}
.li.tap:active{background:var(--fill-2)}
.li-ic{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;color:#fff;flex:none}
.li-ic svg{width:18px;height:18px}
.li-ic.a{background:var(--accent)}.li-ic.b{background:var(--blue)}.li-ic.g{background:var(--green)}.li-ic.o{background:var(--orange)}.li-ic.r{background:var(--red)}.li-ic.p{background:var(--purple)}.li-ic.t{background:var(--teal)}.li-ic.k{background:var(--label-3)}
.li-body{flex:1;min-width:0}
.li-t{font-size:16px;font-weight:500;letter-spacing:-.01em;line-height:1.3}
.li-s{font-size:13px;color:var(--label-2);line-height:1.35;margin-top:2px}
.li-r{display:flex;align-items:center;gap:8px;flex:none;color:var(--label-3);font-size:15px}
.chev{width:8px;height:8px;border-right:2px solid var(--label-4);border-bottom:2px solid var(--label-4);transform:rotate(-45deg);flex:none;margin-left:2px}

/* ─ Pills / status ─ */
.pill{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:var(--r-pill);font-size:13px;font-weight:600;letter-spacing:-.005em;white-space:nowrap}
.pill i{width:7px;height:7px;border-radius:50%;background:currentColor;flex:none}
.pill.live{background:var(--green-soft);color:var(--green)}
.pill.pending{background:var(--orange-soft);color:var(--orange)}
.pill.idle{background:var(--fill);color:var(--label-2)}
.pill.info{background:var(--blue-soft);color:var(--blue)}
.pill.bad{background:var(--red-soft);color:var(--red)}
.pill.ac{background:var(--accent-soft);color:var(--accent)}
.tag{display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:6px;background:var(--fill);font-size:12px;font-weight:600;color:var(--label-2);letter-spacing:.01em}

/* ─ Segmented control ─ */
.seg{display:inline-flex;background:var(--fill);padding:2px;border-radius:var(--r-sm);gap:2px}
.seg button{padding:7px 14px;border-radius:8px;font-size:14px;font-weight:600;color:var(--label-2);transition:background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur)}
.seg button.on{background:var(--bg-el);color:var(--label);box-shadow:var(--shadow-sm)}
.seg.full{display:flex;width:100%}
.seg.full button{flex:1;white-space:nowrap;padding:7px 6px}
@media (max-width:420px){.seg.full button{font-size:13px}}

/* ─ Inputs ─ */
.field{display:grid;gap:6px}
.field label{font-size:13px;font-weight:600;color:var(--label-2);padding-left:4px}
.inp{width:100%;min-height:48px;padding:0 16px;border-radius:var(--r-md);border:1px solid transparent;background:var(--fill);color:var(--label);font-size:17px;outline:none;transition:background var(--dur),border-color var(--dur),box-shadow var(--dur)}
.inp::placeholder{color:var(--label-3)}
.inp:focus{background:var(--bg-el);border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
textarea.inp{padding:12px 16px;min-height:96px;resize:vertical;line-height:1.45}
.inp-row{display:flex;gap:8px}
.inp-row .inp{flex:1}

/* ─ Progress ─ */
.bar{height:8px;border-radius:var(--r-pill);background:var(--fill);overflow:hidden}
.bar > i{display:block;height:100%;border-radius:inherit;background:var(--accent);transition:width .8s var(--ease)}
.bar.g > i{background:var(--green)}

/* ─ Ring ─ */
.ring{position:relative;width:84px;height:84px;flex:none}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:8;stroke-linecap:round}
.ring .tr{stroke:var(--fill)}
.ring .pr{stroke:var(--accent);transition:stroke-dashoffset 1s var(--ease)}
.ring b{position:absolute;inset:0;display:grid;place-items:center;font-size:20px;font-weight:700;letter-spacing:-.03em}

/* ─ Stepper ─ */
.stepper{display:inline-flex;align-items:center;background:var(--fill);border-radius:var(--r-sm);height:34px}
.stepper button{width:34px;height:34px;display:grid;place-items:center;font-size:20px;font-weight:500;color:var(--label);border-radius:var(--r-sm)}
.stepper button:active{background:var(--fill-2)}
.stepper button[disabled]{color:var(--label-4)}
.stepper span{min-width:28px;text-align:center;font-weight:600;font-variant-numeric:tabular-nums}

/* ─ Sheets (modal, iOS bottom sheet on mobile) ─ */
.scrim{position:fixed;inset:0;background:var(--sheet-scrim);z-index:90;opacity:0;pointer-events:none;transition:opacity var(--dur) var(--ease)}
.scrim.on{opacity:1;pointer-events:auto}
.sheet{position:fixed;left:0;right:0;bottom:0;z-index:95;background:var(--bg-el);border-radius:var(--r-xl) var(--r-xl) 0 0;box-shadow:var(--shadow-lg);max-height:92dvh;overflow:auto;transform:translateY(105%);transition:transform .42s var(--ease);padding:12px 20px 28px;padding-bottom:calc(28px + env(safe-area-inset-bottom))}
.sheet{visibility:hidden}
.sheet.on{transform:translateY(0);visibility:visible}
.sheet .grab{width:36px;height:5px;border-radius:3px;background:var(--fill-2);margin:0 auto 14px}
@media (min-width:720px){
  .sheet{left:50%;right:auto;bottom:auto;top:50%;width:min(520px,92vw);border-radius:var(--r-xl);transform:translate(-50%,-46%) scale(.96);opacity:0;padding:28px}
  .sheet.on{transform:translate(-50%,-50%) scale(1);opacity:1}
  .sheet .grab{display:none}
}

/* ─ Toast ─ */
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom));transform:translate(-50%,20px);background:var(--label);color:var(--bg-el);padding:10px 18px;border-radius:var(--r-pill);font-size:14px;font-weight:600;opacity:0;pointer-events:none;transition:all var(--dur) var(--ease);z-index:120;box-shadow:var(--shadow-lg);white-space:nowrap}
.toast.show{opacity:1;transform:translate(-50%,0)}
.hub .toast{bottom:calc(var(--tab-h) + 16px + env(safe-area-inset-bottom))}
@media (min-width:860px){.hub .toast{bottom:24px}}

/* ─ Reveal on scroll ─ */
.rv{opacity:0;transform:translateY(14px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.rv.in{opacity:1;transform:none}
html.no-js .rv{opacity:1;transform:none}

/* ─ Headline system (mirrors tradingfellows.com) ─ */
.sec-h2{font-size:clamp(30px,4.8vw,46px);line-height:1.06;font-weight:800;letter-spacing:-.045em;margin:0;color:var(--label);overflow-wrap:break-word}
.sec-h2 br{display:none}
@media (min-width:600px){.sec-h2 br{display:initial}}
.mk{position:relative;display:inline;color:var(--accent);background-image:linear-gradient(transparent 58%,var(--mk) 58%,var(--mk) 92%,transparent 92%);background-size:0% 100%;background-repeat:no-repeat;background-position:0 0;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding:0 .06em;margin:0 -.06em;border-radius:3px;transition:background-size .85s cubic-bezier(.22,1,.36,1) .18s}
.rv.in .mk,.in .mk,.mk.on,html.no-js .mk{background-size:100% 100%}
.ul{position:relative;display:inline-block;white-space:nowrap;color:var(--accent)}
.ul::after{content:"";position:absolute;left:0;right:0;bottom:-.04em;height:.085em;min-height:4px;border-radius:3px;background:linear-gradient(90deg,var(--accent),var(--accent-2));transform-origin:left center;animation:sweep 3.4s ease-in-out infinite}
@keyframes sweep{0%,100%{opacity:.42;transform:scaleX(.9)}50%{opacity:1;transform:scaleX(1)}}
@media (prefers-reduced-motion:reduce){.mk{background-size:100% 100%!important;transition:none!important}.ul::after{animation:none;opacity:.7}}

/* ─ Footer ─ */
.foot{border-top:1px solid var(--sep);padding:40px 0 calc(40px + env(safe-area-inset-bottom));color:var(--label-3);font-size:13px}
.foot-in{display:flex;flex-wrap:wrap;gap:18px 28px;align-items:center;justify-content:space-between}
.foot a{color:var(--label-2)}

/* ─ Skeleton ─ */
.sk{background:linear-gradient(90deg,var(--fill) 25%,var(--fill-2) 50%,var(--fill) 75%);background-size:200% 100%;animation:sk 1.4s infinite;border-radius:8px;color:transparent!important}
@keyframes sk{to{background-position:-200% 0}}

/* ─ Utilities ─ */
.tabular{font-variant-numeric:tabular-nums}
.center{text-align:center}
.mt4{margin-top:4px}.mt8{margin-top:8px}.mt12{margin-top:12px}.mt16{margin-top:16px}.mt24{margin-top:24px}.mt32{margin-top:32px}.mt48{margin-top:48px}
.mb8{margin-bottom:8px}.mb12{margin-bottom:12px}.mb16{margin-bottom:16px}.mb24{margin-bottom:24px}
.gap6{gap:6px}.gap8{gap:8px}.gap16{gap:16px}
.w100{width:100%}
.nowrap{white-space:nowrap}
.ell{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hr{height:1px;background:var(--sep);margin:16px 0}

/* Plus Jakarta Sans has a narrow space: no negative tracking below 20px */
.li-t,.btn,.pill,.fn,.tag,.brand,.faq summary,.prod .pn,.how-step b,.ban-h b,.vchip,.sx-tab div>b,.sub,.li-s,input,select,textarea,button{letter-spacing:0}