/* VE LAB Light — shared styles for the Billion-Dollar Curve site */
:root{
  --amber:#f59e0b; --amber-strong:#d97706; --amber-soft:#fef3c7;
  --bg:#ffffff; --panel:#fafafa; --line:#e5e7eb; --line-2:#d4d4d8;
  --ink:#0a0a0a; --muted:#555; --faint:#999;
  --green:#16a34a; --green-soft:#eafaef; --green-line:#9acba1;
  --red:#dc2626; --red-soft:#fdecec; --red-line:#f3b4b4;
  --mono:'JetBrains Mono',ui-monospace,monospace;
  --ring:0 0 0 3px rgba(245,158,11,.35);     /* amber focus ring */
  --ring-ink:0 0 0 3px rgba(10,10,10,.10);   /* subtle ink ring */
  --shadow-sm:0 1px 2px rgba(0,0,0,.04);
  --shadow-md:0 4px 16px rgba(0,0,0,.06);
  --ease:cubic-bezier(.4,0,.2,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--muted);line-height:1.65;-webkit-font-smoothing:antialiased;padding:0 0 90px}
::selection{background:var(--ink);color:#fff}
.wrap{max-width:1000px;margin:0 auto;padding:0 28px}
a{color:var(--amber-strong)}
a:focus-visible{outline:2px solid var(--amber);outline-offset:2px;border-radius:3px}

/* shared focus ring for custom controls */
.ci:focus-visible,.tb:focus-visible,.seg button:focus-visible,.scn:focus-visible{outline:2px solid var(--amber);outline-offset:2px;border-radius:8px}

/* ---- top nav ---- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1.5px solid var(--line)}
.nav-in{max-width:1000px;margin:0 auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.nav .logo{font-weight:900;font-size:17px;color:var(--ink);letter-spacing:-.02em;text-decoration:none;display:flex;align-items:center;gap:9px;flex:none}
.nav .logo small{font-family:var(--mono);font-size:.6rem;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);font-weight:400}
.nav-links{display:flex;gap:4px;flex-wrap:wrap;align-items:center}
.nav-links a{font-size:.86rem;font-weight:600;color:var(--faint);text-decoration:none;padding:8px 12px;border-radius:8px;transition:color .15s var(--ease),background .15s var(--ease);white-space:nowrap}
.nav-links a:hover{color:var(--ink);background:var(--panel)}
.nav-links a[aria-current=page]{color:var(--ink);background:var(--amber-soft)}
.nav-links a.nav-back{color:var(--ink);margin-right:6px;border:1.5px solid var(--line);transition:border-color .15s var(--ease),background .15s var(--ease)}
.nav-links a.nav-back:hover{border-color:var(--ink);background:transparent}
/* mobile: one crisp horizontal-scroll row, no multi-row wrap */
@media(max-width:560px){
  .nav-in{height:54px;padding:0 16px;gap:10px}
  .nav .logo{font-size:15px;gap:6px}
  .nav .logo small{display:none}
  .nav-links{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;margin:0 -16px;padding:0 16px;-ms-overflow-style:none}
  .nav-links::-webkit-scrollbar{display:none}
  .nav-links a{padding:7px 10px;font-size:.82rem;flex:none}
  .nav-links a.nav-back{margin-right:2px}
}
.empty{border:1.5px dashed var(--line);border-radius:12px;padding:22px 18px;text-align:center;color:var(--faint);font-size:.9rem;line-height:1.6}
.empty::before{content:"";display:block;width:24px;height:24px;margin:0 auto 10px;border:1.5px dashed var(--line-2);border-radius:50%;background:var(--panel)}
.authbox{max-width:420px;margin-top:24px}
.autherr{border:1px solid var(--red-line);border-radius:10px;padding:11px 13px;margin-bottom:14px;font-size:.85rem;line-height:1.5;background:var(--red-soft);color:#a31621;transition:opacity .2s var(--ease)}
.autherr[hidden]{display:none}
.autherr.ok{background:var(--green-soft);border-color:var(--green-line);color:#1a7f37}
.authnote{font-size:.78rem;margin-top:16px;color:var(--faint);line-height:1.6}
.userbar{display:flex;justify-content:flex-end;align-items:center;gap:10px;font-size:.8rem;color:var(--faint);margin-bottom:10px}
.userbar #ub-email{font-family:var(--mono);color:var(--ink);font-size:.78rem}
.linkbtn{background:none;border:none;color:var(--amber-strong);font-weight:600;cursor:pointer;font-family:inherit;font-size:.8rem;padding:2px 0;text-decoration:underline;text-underline-offset:2px}
.linkbtn:hover{color:var(--ink)}
.linkbtn:focus-visible{outline:2px solid var(--amber);outline-offset:2px;border-radius:3px}

/* ---- page head ---- */
.head{padding:56px 0 0}
h1{font-weight:900;color:var(--ink);font-size:clamp(2rem,5vw,3.1rem);line-height:1.05;letter-spacing:-.03em}
h1 em{color:var(--amber-strong);font-style:normal}
.sub{color:var(--muted);max-width:660px;margin:16px 0 0;font-size:1.04rem;line-height:1.6}
.sub a{border-bottom:1px solid var(--line-2);text-decoration:none}
.sub a:hover{border-color:var(--amber-strong)}
.section-label{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);margin:0 0 14px}

/* ---- essay callout ---- */
.pg{background:var(--amber-soft);border-radius:12px;padding:15px 17px;margin-bottom:18px;font-size:.88rem;color:#7c4a02;line-height:1.6;border-left:3px solid var(--amber)}
.pg b{color:#5b3600}
.pg .who{font-family:var(--mono);font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:#a36a12;display:block;margin-top:6px}

/* ---- hub cards ---- */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:40px}
@media(max-width:640px){.cards{grid-template-columns:1fr}}
.card-link{display:block;text-decoration:none;border:1.5px solid var(--line);border-radius:16px;padding:24px;background:#fff;transition:border-color .18s var(--ease),box-shadow .18s var(--ease),transform .12s var(--ease)}
.card-link:hover{border-color:var(--ink);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.card-link:active{transform:translateY(0)}
.card-link .num{font-family:var(--mono);font-size:.72rem;color:var(--amber-strong);font-weight:700}
.card-link h3{font-size:1.25rem;font-weight:800;color:var(--ink);letter-spacing:-.01em;margin:10px 0 6px}
.card-link p{font-size:.9rem;color:var(--muted);line-height:1.55}
.card-link .go{font-family:var(--mono);font-size:.78rem;color:var(--ink);font-weight:700;margin-top:14px;display:inline-flex;gap:6px;align-items:center;transition:gap .15s var(--ease)}
.card-link:hover .go{gap:10px}

/* ---- scenario picker (curve) ---- */
.scenarios{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:8px}
@media(max-width:760px){.scenarios{grid-template-columns:repeat(2,1fr)}}
.scn{text-align:left;background:#fff;border:1.5px solid var(--line);border-radius:14px;padding:15px 15px 17px;cursor:pointer;transition:border-color .15s var(--ease),box-shadow .15s var(--ease),transform .1s var(--ease);color:var(--muted);font-family:inherit}
.scn:hover{border-color:var(--line-2);box-shadow:0 2px 10px rgba(0,0,0,.05);transform:translateY(-1px)}
.scn:active{transform:translateY(0)}
.scn:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.scn[aria-pressed=true]{border-color:var(--ink);box-shadow:0 0 0 1px var(--ink)}
.scn .nm{color:var(--ink);font-weight:700;font-size:.95rem;display:flex;align-items:center;gap:7px}
.scn .kind{font-size:.72rem;color:var(--faint);margin-top:3px}
.scn .rate{font-family:var(--mono);font-size:1.25rem;color:var(--amber-strong);margin-top:12px;font-weight:500}
.scn .rate small{color:var(--faint);font-size:.68rem;font-weight:400}
.dot{width:7px;height:7px;border-radius:50%;flex:none}
.assume{font-size:.86rem;color:var(--muted);background:var(--panel);border:1.5px solid var(--line);border-left:3px solid var(--amber);border-radius:0 12px 12px 0;padding:15px 17px;margin-top:14px;line-height:1.6}
.assume b{color:var(--amber-strong);font-weight:700}
.assume .est{font-family:var(--mono);font-size:.7rem;color:var(--faint);display:block;margin-top:6px;letter-spacing:.03em}

.grid{display:grid;grid-template-columns:300px 1fr;gap:40px;margin-top:32px}
@media(max-width:860px){.grid{grid-template-columns:1fr;gap:30px}}
.field{margin-bottom:22px}
.field label{display:flex;justify-content:space-between;align-items:baseline;font-size:.84rem;color:var(--ink);font-weight:600;margin-bottom:9px}
.field label .val{font-family:var(--mono);color:var(--amber-strong);font-size:.86rem}
input[type=range]{width:100%;accent-color:var(--amber);height:6px;cursor:pointer;background:var(--line);border-radius:999px;appearance:none;-webkit-appearance:none}
input[type=range]::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--ink);border:2px solid #fff;box-shadow:0 1px 3px rgba(0,0,0,.2);cursor:pointer;transition:transform .1s var(--ease)}
input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.12)}
input[type=range]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:var(--ink);border:2px solid #fff;box-shadow:0 1px 3px rgba(0,0,0,.2);cursor:pointer}
input[type=range]:focus-visible{outline:2px solid var(--amber);outline-offset:4px;border-radius:999px}
input[type=number],input[type=text],input[type=date],input[type=email],input[type=password],textarea,select{width:100%;background:#fff;border:1.5px solid var(--line);border-radius:10px;color:var(--ink);font-family:inherit;font-size:.95rem;padding:11px 13px;outline:none;transition:border-color .15s var(--ease),box-shadow .15s var(--ease)}
input::placeholder,textarea::placeholder{color:var(--faint)}
input:focus,textarea:focus,select:focus{border-color:var(--ink);box-shadow:var(--ring-ink)}
input:focus-visible,textarea:focus-visible,select:focus-visible{border-color:var(--ink)}
textarea{resize:vertical;min-height:78px;line-height:1.55}
input[type=number]{font-family:var(--mono)}

.readouts{display:grid;grid-template-columns:repeat(4,1fr);border:1.5px solid var(--line);border-radius:14px;overflow:hidden;margin-bottom:18px;background:#fff}
@media(max-width:620px){.readouts{grid-template-columns:repeat(2,1fr)}}
.stat{padding:16px 18px;border-right:1.5px solid var(--line)}
.stat:last-child{border-right:none}
@media(max-width:620px){.stat:nth-child(2){border-right:none}.stat:nth-child(-n+2){border-bottom:1.5px solid var(--line)}}
.stat .k{font-size:.68rem;text-transform:uppercase;letter-spacing:.05em;color:var(--faint)}
.stat .v{font-family:var(--mono);font-size:1.32rem;font-weight:500;color:var(--ink);margin-top:8px;letter-spacing:-.01em}
.stat .v.hit{color:var(--green)} .stat .v.miss{color:var(--amber-strong)}
.verdict{display:flex;align-items:flex-start;gap:12px;padding:15px 17px;margin-bottom:20px;background:var(--panel);border:1.5px solid var(--line);border-radius:12px}
.verdict .vdot{width:9px;height:9px;border-radius:50%;margin-top:7px;flex:none}
.verdict .tag{font-family:var(--mono);font-weight:700;font-size:.92rem}
.verdict .body{font-size:.88rem;margin-top:3px;color:var(--muted);line-height:1.55}
.chartcard{border-top:1.5px solid var(--line);padding-top:20px}
.chartcard .top{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px;gap:12px;flex-wrap:wrap}
.chartcard .top .section-label{margin:0}
.seg{display:inline-flex;border:1.5px solid var(--line);border-radius:9px;overflow:hidden}
.seg button{font-family:var(--mono);font-size:.72rem;font-weight:700;padding:7px 13px;background:#fff;border:none;color:var(--faint);cursor:pointer;transition:background .12s var(--ease),color .12s var(--ease)}
.seg button:hover{color:var(--ink)}
.seg button[aria-pressed=true]{background:var(--ink);color:#fff}
.axis-help{font-size:.78rem;color:var(--faint);margin:0 0 14px;line-height:1.55}
canvas{width:100%;height:320px;display:block}
.lede{font-family:var(--mono);color:var(--muted);font-size:.9rem;margin:28px 0 0;line-height:1.7}
.lede b{color:var(--amber-strong)}

/* ---- tabs (tools) ---- */
.tabs{display:flex;gap:2px;margin-top:8px;border-bottom:1.5px solid var(--line);flex-wrap:wrap}
.tab{font-family:inherit;font-size:.88rem;font-weight:600;color:var(--faint);background:none;border:none;border-bottom:2px solid transparent;padding:12px 14px;cursor:pointer;margin-bottom:-1.5px;transition:color .15s var(--ease),border-color .15s var(--ease)}
.tab:hover{color:var(--ink)}
.tab[aria-selected=true]{color:var(--ink);border-bottom-color:var(--ink)}
.tab:focus-visible{outline:2px solid var(--amber);outline-offset:-4px;border-radius:6px}
.cnt:empty{display:none}
.cnt{display:inline-block;margin-left:6px;min-width:17px;padding:0 5px;font-size:.7rem;font-weight:700;line-height:17px;text-align:center;color:#111;background:var(--amber);border-radius:999px;vertical-align:1px}
.bridge{margin-top:16px;padding:15px 17px;border:1px dashed var(--line);border-radius:12px;background:var(--panel);font-size:.9rem;line-height:1.6}
.bridge a{color:var(--amber-strong);font-weight:600}
.bridge a:hover{text-decoration:none}
.panel{display:none;padding-top:30px}
.panel.show{display:block;animation:fade .25s var(--ease)}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

/* ---- tool internals ---- */
.tool h3{font-size:1.18rem;font-weight:800;color:var(--ink);letter-spacing:-.01em;margin-bottom:5px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tool h3 .autosave{font-size:.66rem;color:var(--green);font-weight:700;font-family:var(--mono);letter-spacing:.04em;text-transform:uppercase}
.tool .tdesc{font-size:.92rem;color:var(--muted);margin-bottom:18px;line-height:1.6}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px} .row3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media(max-width:560px){.row2,.row3{grid-template-columns:1fr}}
.ig{margin-bottom:14px} .ig .lbl{font-size:.7rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--faint);margin-bottom:7px}
.btn,.btno{display:inline-flex;align-items:center;justify-content:center;padding:11px 20px;border-radius:100px;font-size:.82rem;font-weight:700;cursor:pointer;font-family:inherit;border:1.5px solid transparent;line-height:1;transition:background .12s var(--ease),border-color .12s var(--ease),transform .06s var(--ease),box-shadow .15s var(--ease)}
.btn{background:var(--ink);color:#fff}
.btn:hover{background:#000;box-shadow:var(--shadow-sm)}
.btno{background:#fff;color:var(--ink);border-color:var(--line-2)}
.btno:hover{border-color:var(--ink);background:var(--panel)}
.btn:active,.btno:active{transform:translateY(1px)}
.btn:focus-visible,.btno:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.btn[disabled],.btno[disabled]{opacity:.5;cursor:not-allowed;box-shadow:none}
.btnrow{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:18px}
.btnrow.between{justify-content:space-between}
.gd-actions{display:flex;justify-content:flex-end;margin:4px 0 6px}
.gd-actions .btno{padding:7px 14px;font-size:.76rem}
.out{background:var(--panel);border:1.5px solid var(--line);border-radius:12px;padding:18px;margin-top:16px}
.out h4{font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);margin-bottom:13px}
.ms{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px}
.mv{background:#fff;border:1.5px solid var(--line);border-radius:10px;padding:13px} .mv-v{font-size:1.2rem;font-weight:800;color:var(--ink);font-family:var(--mono)} .mv-l{font-size:.68rem;color:var(--faint);margin-top:3px}
.br{display:flex;align-items:center;gap:10px;margin-bottom:7px} .brl{font-size:.68rem;color:var(--faint);width:78px;text-align:right;font-family:var(--mono)} .brt{flex:1;background:#eee;border-radius:5px;height:24px;overflow:hidden} .brf{height:100%;background:var(--amber);border-radius:5px;display:flex;align-items:center;padding-left:8px;transition:width .3s var(--ease)} .brv{font-size:.7rem;font-weight:700;color:#5b3600;font-family:var(--mono)}
.tgg{display:flex;max-width:300px} .tb{flex:1;padding:9px;border:1.5px solid var(--line);font-size:.78rem;font-weight:600;cursor:pointer;background:#fff;font-family:inherit;color:var(--muted);transition:background .12s var(--ease),color .12s var(--ease),border-color .12s var(--ease)} .tb:first-child{border-radius:9px 0 0 9px} .tb:last-child{border-radius:0 9px 9px 0} .tb[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}
.qrow{margin-bottom:14px} .qrow .qq{font-size:.9rem;font-weight:500;color:var(--ink);margin-bottom:8px;line-height:1.5}
.tag{display:inline-block;background:#f0f0f0;color:#333;font-size:.7rem;font-weight:700;padding:3px 9px;border-radius:6px;margin:2px}
.tgr{background:#dcfce7;color:#166534} .tgy{background:#fef3c7;color:#92400e} .tgb{background:#fee2e2;color:#991b1b}
.le{border:1.5px solid var(--line);border-radius:10px;padding:14px;margin-bottom:10px;background:#fff;transition:border-color .15s var(--ease)}
.le:hover{border-color:var(--line-2)} .le-d{font-size:.7rem;color:var(--faint);margin-bottom:4px;font-family:var(--mono)} .le-t{font-weight:700;font-size:.88rem;margin-bottom:5px;color:var(--ink);line-height:1.5} .le-tgs{display:flex;gap:5px;flex-wrap:wrap;margin-top:8px}
.chi{display:flex;align-items:flex-start;gap:11px;padding:12px 0;border-bottom:1px solid var(--line)} .chi:last-child{border:none} .ci{width:22px;height:22px;border-radius:6px;border:1.5px solid var(--line-2);flex:none;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:.78rem;font-weight:700;color:#fff;transition:background .12s var(--ease),border-color .12s var(--ease)} .ci:hover{border-color:var(--ink)} .ci[aria-checked=true]{background:var(--ink);border-color:var(--ink)} .chi-t{font-weight:600;font-size:.88rem;color:var(--ink);line-height:1.5} .chi-s{font-size:.72rem;color:var(--faint);font-family:var(--mono);letter-spacing:.04em;text-transform:uppercase;margin-top:2px}
.bigscore{text-align:center;margin-bottom:16px;padding:8px 0} .bigscore .n{font-size:2.8rem;font-weight:900;letter-spacing:-2px;color:var(--ink);font-family:var(--mono);line-height:1} .bigscore .g{font-size:.98rem;font-weight:700;margin-top:6px}
.gap{padding:9px 12px;background:#fff;border:1.5px solid var(--line);border-radius:8px;font-size:.82rem;color:var(--muted);margin-bottom:6px;line-height:1.5}

/* ---- toast ---- */
.toast-wrap{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:100;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;width:max-content;max-width:calc(100vw - 32px)}
.toast{pointer-events:auto;background:var(--ink);color:#fff;padding:11px 18px;border-radius:100px;font-size:.84rem;font-weight:600;font-family:'Inter',sans-serif;box-shadow:0 8px 24px rgba(0,0,0,.18);animation:toast-in .25s var(--ease);display:flex;align-items:center;gap:9px}
.toast.ok{background:#0f3d1f}
.toast.err{background:#7f1d1d}
.toast .ic{font-family:var(--mono);font-weight:700}
.toast.leaving{animation:toast-out .25s var(--ease) forwards}
@keyframes toast-in{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
@keyframes toast-out{to{opacity:0;transform:translateY(8px)}}
@media(max-width:560px){.toast-wrap{bottom:16px}.toast{font-size:.8rem;padding:10px 15px}}

/* ---- faq + glossary ---- */
.faq{border-bottom:1.5px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:700;color:var(--ink);font-size:.98rem;display:flex;justify-content:space-between;gap:12px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--faint);font-weight:400;font-size:1.4rem;line-height:1;transition:transform .2s var(--ease),color .15s var(--ease)}
.faq[open] summary::after{content:"\2013";color:var(--ink)}
.faq summary:hover::after{color:var(--ink)}
.faq summary:focus-visible{outline:2px solid var(--amber);outline-offset:4px;border-radius:4px}
.faq .a{padding:0 0 20px;font-size:.93rem;color:var(--muted);line-height:1.7;max-width:720px}
.gl{display:grid;grid-template-columns:180px 1fr;gap:6px 24px;padding:16px 0;border-bottom:1px solid var(--line);font-size:.93rem}
@media(max-width:560px){.gl{grid-template-columns:1fr;gap:4px}.gl dt{margin-top:4px}}
.gl dt{font-weight:700;color:var(--ink);font-family:var(--mono);font-size:.84rem}
.gl dd{color:var(--muted);line-height:1.6}

footer{margin-top:56px;padding-top:24px;border-top:1.5px solid var(--line);font-size:.76rem;color:var(--faint)}
footer a{text-decoration:none}
footer a:hover{text-decoration:underline}

/* reduced motion */
@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}