/* ============================================================
   Lexert Labs — shared site design system
   Dark, professional. Matches the lab player palette.
   ============================================================ */

/* present for SEO/screen readers, invisible on screen — for pages whose
   visible design has no room for a heading but still needs one in the DOM */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
:root{
  --bg:#0a0d12; --bg2:#0c1017; --panel:#12171f; --panel2:#171e28; --panel3:#212b38;
  --line:#232e3b; --line2:#2f3d4d;
  --ink:#e8eef4; --dim:#93a3b4; --faint:#6a7e91;
  --net:#48b9d0; --sec:#e0a24a; --good:#4fc98a; --bad:#f0656a; --warn:#e6bd52;
  --accent:#48b9d0; --accent-ink:#052730; --accent2:#5bd0a0; --linux:#e2703f; --aplus:#b98cf0; --ai:#6d7cf0;
  --radius:12px; --radius-sm:8px; --radius-lg:18px;
  --shadow-1:0 1px 2px rgba(0,0,0,.35);
  --shadow-2:0 6px 20px -6px rgba(0,0,0,.55),0 2px 6px -2px rgba(0,0,0,.4);
  --shadow-3:0 18px 46px -14px rgba(0,0,0,.7);
  --mono:ui-monospace,'Cascadia Code','JetBrains Mono','SF Mono',Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --maxw:1160px;
}
/* Smooth cross-page nav: browser crossfades old->new page instead of a hard
   flash reload. No JS, no SPA rewrite — still a real navigation underneath.
   Unsupported browsers (older Firefox/Safari) just get the normal instant nav. */
@view-transition{navigation:auto}
@media (prefers-reduced-motion: reduce){
  ::view-transition-group(*),::view-transition-old(*),::view-transition-new(*){animation:none!important}
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.6;min-height:100vh;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  background-image:
    radial-gradient(1000px 600px at 8% -10%,rgba(72,185,208,.08),transparent 60%),
    radial-gradient(900px 620px at 100% 0%,rgba(224,162,74,.055),transparent 55%);
  background-attachment:fixed;
}
a{color:var(--net);text-decoration:none;text-underline-offset:3px}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono)}
.muted{color:var(--dim)}
.center{text-align:center}
section{position:relative}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--sans);font-size:15px;font-weight:600;
  padding:12px 22px;border-radius:10px;border:1px solid transparent;cursor:pointer;transition:.16s;white-space:nowrap;line-height:1}
.btn.primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 6px 18px -8px rgba(72,185,208,.7)}
.btn.primary:hover{filter:brightness(1.08);transform:translateY(-1px);text-decoration:none}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line2)}
.btn.ghost:hover{border-color:var(--faint);background:var(--panel2);text-decoration:none}
.btn.lg{font-size:16px;padding:15px 28px}
.btn.sm{font-size:13px;padding:8px 15px;border-radius:8px}
.btn.block{width:100%;justify-content:center}
.btn:disabled{opacity:.5;cursor:default;transform:none;filter:none}

/* ---------- top nav ---------- */
/* #nav/#footer reserve their mounted height before LexertLabs.mountNav/mountFooter
   inject content (JS-mounted, not server-rendered) — otherwise the pop-in
   from 0 height causes CLS. Measured via headless render, footer split at
   the existing .footer-grid 720px breakpoint. */
#nav{min-height:65px}
#footer{min-height:316px}
@media(max-width:720px){#footer{min-height:468px}}
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(10px);
  background:rgba(10,13,18,.78);border-bottom:1px solid var(--line)}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:0 24px 0 8px;height:64px;display:flex;align-items:center;gap:22px}
.logo{display:flex;align-items:center;letter-spacing:-.01em}
.logo:hover{text-decoration:none}
.logo-img{height:32px;width:auto;display:block}

/* ── Header logo ──────────────────────────────────────────────
   Resting state (default): the brand lockup — the mark plus the
   wordmark "exert Labs", whose leading letter is completed by the
   L in the mark to read "Lexert Labs". The terminal-boot intro is
   hidden unless mountNav adds .logo--intro (home page, every load).
   Tune the marked knobs (box width, --net mono size, word nudge,
   and the animation delays) to taste. */
.nav-in .logo{position:relative;height:32px;width:230px;overflow:hidden}   /* box wide enough for the longest command */
.nav-in .logo-term{display:none}
.nav-in .logo-lockup{display:flex;align-items:center;gap:0;height:32px}
.nav-in .logo-word{
  font-family:'Monaco',var(--mono);font-weight:700;font-size:19px;letter-spacing:-.02em;
  color:var(--ink);margin-left:-5px;        /* knob: tuck "exert" against the mark's L (more negative = closer) */
}

/* ── Intro sequence (plays on every home-page load) ──────────── */
.nav-in .logo--intro .logo-term{
  display:flex;align-items:center;position:absolute;inset:0;
  font-family:'Monaco',var(--mono);font-size:13.5px;font-weight:600;color:var(--net);letter-spacing:0;
  white-space:nowrap;
  animation:lg-term-out 1s 6.3s both;        /* command eases out, overlapping the lockup fade-in */
}
.nav-in .logo--intro .logo-prompt{margin-right:.45ch}
.nav-in .logo--intro .logo-slot{position:relative;flex:1;height:1.25em}
.nav-in .logo--intro .logo-cmd{position:absolute;left:0;top:0;display:flex;align-items:baseline}
.nav-in .logo--intro .logo-cmd .t{display:inline-block;overflow:hidden;white-space:nowrap;width:0;vertical-align:bottom}

/* cmd 1: "cd lexertlabs" — type slowly, then clear */
.nav-in .logo--intro .logo-cmd1{animation:lg-cmd1-out .3s 3.0s both}
.nav-in .logo--intro .logo-cmd1 .t{animation:lg-type1 1.6s steps(13,end) .7s both}

/* cmd 2: "run lexertlabs.app.html" — appears after cmd1 clears, then types */
.nav-in .logo--intro .logo-cmd2{opacity:0;animation:lg-cmd2-in .3s 3.4s both}
.nav-in .logo--intro .logo-cmd2 .t{animation:lg-type2 2.0s steps(23,end) 3.4s both}

/* brand lockup: hidden through the intro, then a slow fade in */
.nav-in .logo--intro .logo-lockup{opacity:0;animation:lg-lockup-in 2.6s 6.8s cubic-bezier(.22,1,.36,1) both}

@keyframes lg-type1{from{width:0}to{width:calc(13ch + 1px)}}
@keyframes lg-type2{from{width:0}to{width:calc(23ch + 1px)}}
@keyframes lg-cmd1-out{from{opacity:1}to{opacity:0}}
@keyframes lg-cmd2-in{from{opacity:0}to{opacity:1}}
@keyframes lg-term-out{from{opacity:1}to{opacity:0}}
@keyframes lg-lockup-in{
  0%{opacity:0;transform:translateY(3px) scale(.97)}
  100%{opacity:1;transform:translateY(0) scale(1)}
}
@media (prefers-reduced-motion: reduce){
  .nav-in .logo-term{display:none!important}
  .nav-in .logo-lockup{opacity:1!important;animation:none!important;transform:none!important}
  .nav-in .logo-ent{opacity:1!important;animation:none!important}
}

/* ── Enterprise nav logo: same mark/wordmark/intro as above, plus an
   "Enterprise" suffix that fades in slowly after the lockup settles.
   .logo--ent only widens the fixed-width intro box (23-char terminal
   command sizing above isn't wide enough for the extra word) — doesn't
   touch the base .logo rules the consumer nav still uses. ──────────── */
.nav-in .logo--ent{width:360px}
.nav-in .logo-ent{
  font-family:'Monaco',var(--mono);font-weight:700;font-size:19px;letter-spacing:-.02em;
  color:var(--net);
}
.nav-in .logo--intro .logo-ent{opacity:0;animation:lg-ent-in 2.4s 9.4s both}
@keyframes lg-ent-in{from{opacity:0}to{opacity:1}}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-links a{color:var(--dim);font-size:14.5px;font-weight:500;padding:8px 12px;border-radius:8px}
.nav-links a:hover{color:var(--ink);background:var(--panel2);text-decoration:none}
.nav-links a.active{color:var(--ink)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;background:none;border:1px solid var(--line2);color:var(--ink);border-radius:8px;
  width:40px;height:38px;font-size:18px;cursor:pointer}
.avatar-wrap{position:relative}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--panel3);border:1px solid var(--line2);
  display:flex;align-items:center;justify-content:center;font-weight:600;font-size:13px;color:var(--net);cursor:pointer}
.avatar-menu{display:none;position:absolute;top:44px;right:0;min-width:200px;background:var(--panel2);
  border:1px solid var(--line2);border-radius:var(--radius);box-shadow:var(--shadow-3);padding:6px;z-index:60}
.avatar-wrap.open .avatar-menu{display:block}
.avatar-menu a,.avatar-menu button{display:block;width:100%;text-align:left;padding:10px 12px;border-radius:8px;
  font-size:14px;font-weight:500;color:var(--ink);background:none;border:none;cursor:pointer;font-family:var(--sans)}
.avatar-menu a:hover,.avatar-menu button:hover{background:var(--panel3);text-decoration:none}
.avatar-menu .div{height:1px;background:var(--line);margin:6px 4px}
.avatar-menu .danger{color:var(--bad)}
.cart-wrap{position:relative}
.cart-link{position:relative;display:flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:8px;border:1px solid var(--line2);
  color:var(--ink);font-size:16px;text-decoration:none}
.cart-link:hover{background:var(--panel2);text-decoration:none}
.cart-badge{position:absolute;top:-6px;right:-6px;min-width:18px;height:18px;padding:0 4px;
  border-radius:9px;background:var(--accent2);color:#052018;font-size:10.5px;font-weight:700;
  display:flex;align-items:center;justify-content:center;line-height:1}
.cart-menu{display:none;position:absolute;top:44px;right:0;min-width:240px;background:var(--panel2);
  border:1px solid var(--line2);border-radius:var(--radius);box-shadow:var(--shadow-3);padding:12px;z-index:60}
.cart-wrap.open .cart-menu{display:block}
.cart-menu-items{margin-bottom:10px}
.cart-menu-item{display:flex;align-items:center;justify-content:space-between;gap:14px;
  font-size:13.5px;color:var(--ink);padding:7px 2px;border-bottom:1px solid var(--line)}
.cart-menu-item:last-child{border-bottom:none}
.cart-menu-item span:last-child{font-weight:600;white-space:nowrap}
.cart-menu-total{display:flex;justify-content:space-between;font-size:13.5px;font-weight:700;
  padding:8px 2px 10px;margin-top:2px;border-top:1px solid var(--line2)}
.cart-menu-actions{display:flex;gap:8px}
.cart-menu-actions .btn{flex:1;justify-content:center}
@media(max-width:780px){
  .nav-links,.nav-right .btn{display:none}
  .nav-toggle{display:flex;align-items:center;justify-content:center}
  /* narrow phones: shrink the fixed logo box so toggle + avatar still fit the 64px row */
  .nav-in .logo{width:170px}
  .nav-in .logo--ent{width:260px}
  .nav-in .logo--intro .logo-term{font-size:11px}
  .nav-in .logo-ent{font-size:16px}
  .nav.open .nav-links{display:flex;position:absolute;top:64px;left:0;right:0;flex-direction:column;
    background:var(--panel);border-bottom:1px solid var(--line);padding:10px 16px;gap:2px}
  .nav.open .nav-links a{padding:12px}
}

/* ---------- hero ---------- */
.hero{padding:84px 0 64px;text-align:center}
.hero h1{font-size:clamp(34px,5.4vw,58px);line-height:1.05;letter-spacing:-.02em;font-weight:700;max-width:26ch;margin:0 auto 20px}
.hero h1 .grad{background:linear-gradient(100deg,var(--net),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:clamp(16px,2vw,20px);color:var(--dim);max-width:60ch;margin:0 auto 34px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-note{margin-top:16px;font-size:13px;color:var(--faint)}

/* live "see how it works" demo in hero: track-switcher + iframed terminal */
.demo-widget{max-width:900px;margin:56px auto 0;display:flex;gap:14px;align-items:flex-start;text-align:left}
.demo-tracks{display:flex;flex-direction:column;gap:8px;flex-shrink:0;width:160px}
.demo-track-btn{font-family:var(--sans);font-size:13.5px;font-weight:600;padding:0 14px;
  flex:0 0 42px;display:flex;align-items:center;border-radius:10px;
  border:1px solid var(--line2);background:var(--panel);color:var(--dim);cursor:pointer;transition:.15s;
  white-space:nowrap;box-sizing:border-box}
.demo-track-btn:hover{color:var(--ink);border-color:var(--line2)}
.demo-track-btn.active{color:var(--ink);background:var(--panel2)}
.demo-track-btn.aplus.active{box-shadow:0 0 0 1px var(--aplus) inset;color:var(--aplus)}
.demo-track-btn.net.active{box-shadow:0 0 0 1px var(--net) inset;color:var(--net)}
.demo-track-btn.secplus.active{box-shadow:0 0 0 1px var(--sec) inset;color:var(--sec)}
.demo-track-btn.linux.active{box-shadow:0 0 0 1px var(--linux) inset;color:var(--linux)}
.demo-track-btn.ai.active{box-shadow:0 0 0 1px var(--ai) inset;color:var(--ai)}

.hero-term{flex:1;min-width:0;background:radial-gradient(120% 100% at 50% 0%,#0b1219,#05080c 70%);
  border:1px solid var(--line2);border-radius:var(--radius);box-shadow:var(--shadow-3);overflow:hidden;text-align:left}
.hero-term .bar{display:flex;align-items:center;gap:7px;padding:11px 14px;background:#141b24;border-bottom:1px solid #000}
.hero-term .bar .d{width:11px;height:11px;border-radius:50%}
.hero-term .bar .d.r{background:#ff5f57}.hero-term .bar .d.y{background:#febc2e}.hero-term .bar .d.g{background:#28c840}
.hero-term .bar .t{margin-left:8px;font-family:var(--mono);font-size:12px;color:var(--faint)}
.demo-frame{display:block;width:100%;height:460px;border:0;background:var(--bg)}
@media(max-width:720px){
  .demo-widget{flex-direction:column}
  .demo-tracks{flex-direction:row;flex-wrap:wrap;width:auto}
  .demo-track-btn{flex:1 1 auto;justify-content:center}
  .demo-frame{height:560px}
}

/* ---------- generic sections ---------- */
.sec{padding:64px 0}
.sec-head{text-align:center;max-width:64ch;margin:0 auto 44px}
.sec-head .kicker{font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--net);margin-bottom:12px}
.sec-head h2{font-size:clamp(26px,3.4vw,38px);line-height:1.15;letter-spacing:-.01em;margin-bottom:14px}
.sec-head p{font-size:16.5px;color:var(--dim)}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent)}

/* feature grid */
.grid{display:grid;gap:18px}
.grid.g3{grid-template-columns:repeat(3,1fr)}
.grid.g2{grid-template-columns:repeat(2,1fr)}
.grid.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:860px){.grid.g3,.grid.g4{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.grid.g2,.grid.g3,.grid.g4{grid-template-columns:1fr}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-1);
  transition:.18s}
.card:hover{border-color:var(--line2);box-shadow:var(--shadow-2);transform:translateY(-3px);text-decoration:none}
a.card:hover *{text-decoration:none}
.feat .ic{width:44px;height:44px;border-radius:11px;background:var(--panel3);border:1px solid var(--line2);
  display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:16px;color:var(--net)}
.feat h3{font-size:17px;margin-bottom:8px}
.feat p{font-size:14.5px;color:var(--dim)}

/* steps */
.steps{counter-reset:s}
.step{position:relative;padding-left:22px}
.step .n{font-family:var(--mono);color:var(--net);font-size:13px;font-weight:700;letter-spacing:.1em}
.step h3{font-size:18px;margin:8px 0}
.step p{color:var(--dim);font-size:14.5px}

/* stat row */
.stats{display:flex;flex-wrap:wrap;gap:18px;justify-content:center}
.stat{text-align:center;min-width:150px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px}
.stat .num{font-size:34px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.stat .lbl{font-size:13px;color:var(--dim);margin-top:4px}

/* ---------- lab / category cards ---------- */
.cat-head{display:flex;align-items:center;gap:12px;margin:8px 0 20px}
.cat-head .pip{width:12px;height:12px;border-radius:3px;background:var(--tab-color,var(--net))}
.cat-head h2{font-size:22px}
.cat-head .count{font-family:var(--mono);font-size:12px;color:var(--faint);margin-left:auto}
.labcard{position:relative;display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px;overflow:hidden;box-shadow:var(--shadow-1);transition:.18s;min-height:168px}
.labcard::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--net);opacity:0;transition:.18s}
.labcard.sec::before{background:var(--sec)}
.labcard.linux::before{background:var(--linux)}
.labcard.aplus::before{background:var(--aplus)}
.labcard.ai::before{background:var(--ai)}
.labcard:hover{border-color:var(--line2);box-shadow:var(--shadow-2);transform:translateY(-3px);text-decoration:none}
.labcard:hover::before{opacity:1}
.labcard .tags{display:flex;gap:6px;margin-bottom:12px;flex-wrap:wrap}
.tag{font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;padding:4px 9px;border-radius:20px;border:1px solid transparent}
.tag.net{background:rgba(72,185,208,.1);color:var(--net);border-color:rgba(72,185,208,.25)}
.tag.sec{background:rgba(224,162,74,.1);color:var(--sec);border-color:rgba(224,162,74,.25)}
.tag.linux{background:rgba(226,112,63,.1);color:var(--linux);border-color:rgba(226,112,63,.28)}
.tag.aplus{background:rgba(185,140,240,.1);color:var(--aplus);border-color:rgba(185,140,240,.28)}
.tag.ai{background:rgba(109,124,240,.1);color:var(--ai);border-color:rgba(109,124,240,.28)}
.tag.diff{background:var(--panel3);color:var(--dim)}
.tag.free{background:rgba(79,201,138,.12);color:var(--good);border-color:rgba(79,201,138,.3)}
.labcard h3{font-size:16.5px;line-height:1.35;margin-bottom:8px}
.labcard p{font-size:13.5px;color:var(--dim);flex:1}
.labcard .foot{display:flex;align-items:center;gap:8px;margin-top:16px;font-size:13px;color:var(--net);font-weight:600}
.labcard.locked{opacity:.92}
.labcard .lock{position:absolute;top:16px;right:16px;color:var(--faint);font-size:15px}
.labcard .done{position:absolute;top:14px;right:14px;font-family:var(--mono);font-size:10px;letter-spacing:.08em;
  color:var(--good);background:rgba(79,201,138,.1);border:1px solid rgba(79,201,138,.3);padding:3px 8px;border-radius:20px}

/* ---------- pricing ---------- */
.price-wrap{max-width:1060px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start}
@media (max-width:860px){.price-wrap{grid-template-columns:1fr;max-width:460px}}
.price-card.sec::before{background:linear-gradient(90deg,var(--sec),#b97f2e)}
.price-card.sec .plan{color:var(--sec)}
.price-card.aplus::before{background:linear-gradient(90deg,var(--aplus),#8f6bc9)}
.price-card.aplus .plan{color:var(--aplus)}
.price-card.linux::before{background:linear-gradient(90deg,var(--linux),#b4552b)}
.price-card.linux .plan{color:var(--linux)}
.price-card.ai::before{background:linear-gradient(90deg,var(--ai),#2b41e9)}
.price-card.ai .plan{color:var(--ai)}
.price-card.featured{border-color:rgba(91,208,160,.45);box-shadow:0 0 0 1px rgba(91,208,160,.3),var(--shadow-3)}
.price-card.featured:hover{border-color:var(--accent2);box-shadow:0 0 0 1px var(--accent2),var(--shadow-2)}
.price-card.featured::before{background:linear-gradient(90deg,var(--net),var(--accent2),var(--sec))}
.price-card .badge{position:absolute;top:18px;right:18px;background:var(--accent2);color:#052018;font-size:11px;
  font-weight:700;letter-spacing:.04em;padding:4px 11px;border-radius:20px}
.price-card .purchased-tag{display:flex;align-items:center;gap:8px;color:var(--good);
  font-size:26px;font-weight:700;letter-spacing:-.01em;margin:12px 0 22px}
.price-card .strike{color:var(--faint);text-decoration:line-through;font-weight:500;font-size:.55em;margin-right:6px}
.price-card .save{display:inline-block;font-size:12.5px;color:var(--accent2);font-weight:600;margin-top:4px}

/* ---- catalog tabs (labs.html) ---- */
.lab-section{background:var(--panel2);border:1px solid var(--line2);border-left:4px solid var(--tab-color,var(--line2));
  border-radius:var(--radius);margin-bottom:16px;overflow:hidden;box-shadow:var(--shadow-1);transition:.18s}
.lab-section[open]{background:var(--panel3);box-shadow:var(--shadow-2)}
.lab-section-head{list-style:none;cursor:pointer;display:flex;align-items:center;gap:14px;padding:20px 24px;
  font-weight:700;font-size:17px;user-select:none;transition:.15s}
.lab-section-head::-webkit-details-marker{display:none}
.lab-section-head:hover{background:rgba(255,255,255,.03)}
.lab-section-head .pip{width:13px;height:13px;border-radius:50%;flex-shrink:0;background:var(--tab-color);
  box-shadow:0 0 0 4px color-mix(in srgb, var(--tab-color) 22%, transparent)}
.lab-section-head .lab-section-title{color:var(--tab-color,var(--ink))}
.lab-section-head .n{margin-left:auto;font-family:var(--mono);font-size:12.5px;color:var(--dim);font-weight:600;
  background:var(--panel);border:1px solid var(--line2);padding:4px 10px;border-radius:20px}
.lab-section-head .chev{color:var(--ink);transition:transform .18s;font-size:18px;font-weight:700}
.lab-section[open] .lab-section-head .chev{transform:rotate(180deg);color:var(--tab-color)}
.lab-section>.grid{padding:6px 24px 26px}
.tabs{display:flex;gap:26px;flex-wrap:wrap;margin-bottom:26px;border-bottom:1px solid var(--line)}
.tab-btn{background:none;border:none;color:var(--dim);font-size:14.5px;font-weight:600;padding:0 0 12px;
  cursor:pointer;position:relative;display:flex;align-items:center;gap:8px;font-family:var(--sans)}
.tab-btn .pip{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.tab-btn .n{font-family:var(--mono);font-size:11.5px;color:var(--faint)}
.tab-btn:hover{color:var(--ink)}
.tab-btn.active{color:var(--ink)}
.tab-btn.active::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--tab-color,var(--dim))}

.price-card{background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line2);
  border-radius:var(--radius-lg);padding:34px 30px;box-shadow:var(--shadow-3);position:relative;overflow:hidden;transition:.18s}
.price-card::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:linear-gradient(90deg,var(--net),var(--sec))}
.price-card:hover{border-color:var(--line2);box-shadow:var(--shadow-2)}
.price-card .plan{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--net)}
.price-card .amt{font-size:52px;font-weight:700;letter-spacing:-.02em;margin:12px 0 2px}
.price-card .amt small{font-size:17px;color:var(--dim);font-weight:500}
.price-card .once{font-size:14px;color:var(--good);margin-bottom:22px}
.price-card.clickable{cursor:pointer}
.price-card.clickable:hover{border-color:var(--accent2);box-shadow:var(--shadow-2),0 0 0 1px var(--accent2)}
.price-card.in-cart{border-color:var(--accent2);box-shadow:var(--shadow-2),0 0 0 1px var(--accent2)}
.cart-list{margin:22px 0 0;border-top:1px solid var(--line2)}
.cart-item{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 0;border-bottom:1px solid var(--line2)}
.cart-item-name{font-size:15px;color:var(--ink)}
.cart-item-price{display:flex;align-items:center;gap:16px;font-weight:600;color:var(--ink);white-space:nowrap}
.cart-item-remove{color:var(--faint);font-size:12.5px;cursor:pointer;background:none;border:none;padding:0;font-family:inherit;text-decoration:underline;text-underline-offset:2px}
.cart-item-remove:hover{color:var(--bad,#e5484d)}
.cart-total{display:flex;align-items:center;justify-content:space-between;padding:18px 0 0;margin-top:2px;font-size:17px;font-weight:700}
.cart-actions{display:flex;flex-direction:column;gap:10px;margin-top:28px}
.auth-choice{display:flex;flex-direction:column;gap:10px;margin-top:6px}
.price-list{list-style:none;margin:22px 0;display:flex;flex-direction:column;gap:12px}
.price-list li{display:flex;gap:11px;font-size:14.5px;color:var(--ink)}
.price-list li::before{content:"✓";color:var(--good);font-weight:700;flex-shrink:0}

/* ---------- modal dialog (see LexertLabs.modal() in assets/auth.js —
   app.html has its own inline copy of this same block, doesn't load this
   file) ---------- */
.modal-back{display:none;position:fixed;inset:0;background:rgba(3,6,10,.6);backdrop-filter:blur(2px);z-index:200;align-items:center;justify-content:center;padding:20px}
.modal-back.show{display:flex}
.modal{background:var(--panel);border:1px solid var(--line2);border-radius:12px;box-shadow:var(--shadow-3);max-width:560px;width:100%;max-height:80vh;overflow:hidden;display:flex;flex-direction:column}
.modal .mhead{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line);background:var(--panel2)}
.modal .mhead h3{font-size:15px;font-weight:600;color:var(--ink)}
.modal .mclose{background:none;border:none;color:var(--dim);font-size:20px;cursor:pointer;line-height:1;padding:0 4px}
.modal .mclose:hover{color:var(--ink)}
.modal .mbody{padding:18px;overflow-y:auto;font-size:13.5px;color:var(--dim);line-height:1.7}

/* ---------- auth forms ---------- */
.auth-wrap{max-width:420px;margin:60px auto;padding:0 24px}
.auth-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);padding:34px 30px;box-shadow:var(--shadow-2)}
.auth-card h1{font-size:24px;margin-bottom:6px;text-align:center}
.auth-card .lead{text-align:center;color:var(--dim);font-size:14.5px;margin-bottom:26px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--dim);margin-bottom:7px;font-weight:500}
.field input,.field textarea{width:100%;font-family:var(--sans);font-size:15px;padding:12px 14px;background:var(--bg2);
  border:1px solid var(--line2);color:var(--ink);border-radius:10px;transition:.15s}
.field textarea{resize:none}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--net);box-shadow:0 0 0 3px rgba(72,185,208,.14)}
.form-err{background:rgba(240,101,106,.1);border:1px solid rgba(240,101,106,.3);color:var(--bad);
  font-size:13.5px;padding:11px 14px;border-radius:9px;margin-bottom:16px;display:none}
.form-err.show{display:block}
.form-ok{background:rgba(79,201,138,.1);border:1px solid rgba(79,201,138,.3);color:var(--good);
  font-size:13.5px;padding:11px 14px;border-radius:9px;margin-bottom:16px}
.auth-alt{text-align:center;margin-top:20px;font-size:14px;color:var(--dim)}
.fineprint{font-size:12px;color:var(--faint);text-align:center;margin-top:16px;line-height:1.6}

/* ---------- dashboard ---------- */
.dash-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:28px}
.dash-head h1{font-size:28px}
.dash-head p{color:var(--dim);font-size:15px}
.progress{height:10px;background:var(--panel3);border-radius:20px;overflow:hidden;border:1px solid var(--line)}
.progress > i{display:block;height:100%;background:linear-gradient(90deg,var(--net),var(--accent2));border-radius:20px;transition:width .4s}
.banner{border-radius:var(--radius);padding:18px 20px;margin-bottom:24px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.banner.locked{background:linear-gradient(135deg,rgba(224,162,74,.12),transparent);border:1px solid rgba(224,162,74,.35)}
.banner.pro{background:linear-gradient(135deg,rgba(79,201,138,.12),transparent);border:1px solid rgba(79,201,138,.35)}
.banner .bt{flex:1;min-width:220px}
.banner h3{font-size:16px;margin-bottom:3px}
.banner p{font-size:13.5px;color:var(--dim)}

/* ---------- lock overlay (gate) ---------- */
.gate{max-width:520px;margin:80px auto;text-align:center;padding:0 24px}
.gate .lockic{font-size:40px;margin-bottom:18px}
.gate h1{font-size:26px;margin-bottom:12px}
.gate p{color:var(--dim);margin-bottom:26px}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--line);margin-top:40px;padding:48px 0 34px;color:var(--dim);font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px}
@media(max-width:720px){.footer-grid{grid-template-columns:1fr 1fr}}
.footer h4{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);margin-bottom:14px}
.footer a{color:var(--dim);display:block;padding:4px 0;font-size:14px}
.footer a:hover{color:var(--ink)}
.footer .fbrand p{margin-top:12px;max-width:34ch;font-size:13.5px;color:var(--faint)}
.footer-bottom{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-top:34px;padding-top:22px;
  border-top:1px solid var(--line);font-size:13px;color:var(--faint)}

/* toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);opacity:0;
  background:var(--panel3);border:1px solid var(--line2);color:var(--ink);padding:12px 20px;border-radius:10px;
  box-shadow:var(--shadow-3);font-size:14px;z-index:200;transition:.25s;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- exam player ---------- */
.exam-shell{max-width:1080px;margin:0 auto;padding:20px 0 60px}
.exam-bar{position:sticky;top:64px;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:12px 18px;margin-bottom:18px;box-shadow:var(--shadow-1)}
.eb-title{font-weight:600;font-size:15px}
.eb-right{display:flex;align-items:center;gap:14px}
.extimer{font-family:var(--mono);font-size:16px;font-weight:700;color:var(--net);background:var(--bg2);border:1px solid var(--line2);padding:5px 12px;border-radius:8px}
.extimer.warn{color:var(--bad);border-color:var(--bad)}
.exprog{font-family:var(--mono);font-size:12px;color:var(--dim)}
.exam-main{display:grid;grid-template-columns:1fr 240px;gap:18px;align-items:start}
@media(max-width:820px){.exam-main{grid-template-columns:1fr}.exam-side{order:-1}}
.exq-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.exq-dom{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--net)}
.flagbtn{background:none;border:1px solid var(--line2);color:var(--dim);font-size:12px;padding:5px 11px;border-radius:20px;cursor:pointer}
.flagbtn.on{color:var(--warn);border-color:var(--warn)}
.exq-stem{font-size:17px;line-height:1.5;margin-bottom:18px;font-weight:500}
.opt{display:flex;align-items:center;gap:12px;padding:13px 15px;border:1px solid var(--line2);border-radius:10px;margin-bottom:10px;cursor:pointer;transition:.14s}
.opt:hover{border-color:var(--faint);background:var(--panel2)}
.opt.sel{border-color:var(--net);background:linear-gradient(180deg,rgba(72,185,208,.1),transparent)}
.opt input{position:absolute;opacity:0;pointer-events:none}
.opt .ol{width:26px;height:26px;flex-shrink:0;border:1px solid var(--line2);border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:12px;color:var(--dim)}
.opt .ol.box{border-radius:6px}
.opt.sel .ol{background:var(--net);color:var(--accent-ink);border-color:var(--net)}
.hint-multi{font-size:12.5px;color:var(--faint);margin-bottom:12px;font-style:italic}
.orderlist,.matchlist{display:flex;flex-direction:column;gap:9px}
.orow{display:flex;align-items:center;gap:12px;padding:11px 14px;border:1px solid var(--line2);border-radius:10px;background:var(--panel2)}
.orow .onum{width:24px;height:24px;flex-shrink:0;background:var(--panel3);border-radius:6px;display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:12px;color:var(--net)}
.orow .otext{flex:1;font-size:14.5px}
.omoves button{background:var(--bg2);border:1px solid var(--line2);color:var(--dim);width:30px;height:28px;border-radius:6px;cursor:pointer;margin-left:4px}
.omoves button:hover:not(:disabled){color:var(--ink);border-color:var(--net)}.omoves button:disabled{opacity:.3;cursor:default}
.mrow{display:flex;align-items:center;gap:12px}
.mrow .mp{flex:1;font-size:14.5px}
.mrow select{flex:1;font-family:var(--sans);font-size:14px;padding:10px 12px;background:var(--bg2);border:1px solid var(--line2);color:var(--ink);border-radius:8px}
/* question box + question-number tile shouldn't lift like a generic .card on hover */
.exam-q:hover,.exam-side .card:hover{transform:none}
.exam-side .palette{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}
.pbtn{aspect-ratio:1;border:1px solid var(--line2);background:var(--bg2);color:var(--dim);border-radius:7px;font-family:var(--mono);font-size:12px;cursor:pointer}
.pbtn.done{background:var(--panel3);color:var(--ink);border-color:var(--faint)}
.pbtn.cur{border-color:var(--net);color:var(--net);box-shadow:0 0 0 2px rgba(72,185,208,.2)}
.pbtn.flag{border-color:var(--warn)}
.pkey{display:flex;gap:14px;margin-top:12px;font-size:11px;color:var(--faint)}
.pkey i{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:5px;vertical-align:-1px;border:1px solid var(--line2)}
.pkey i.done{background:var(--panel3)} .pkey i.flag{border-color:var(--warn)}
.exam-foot{display:flex;justify-content:space-between;gap:10px;margin-top:18px}
/* results */
.exam-results{max-width:760px;margin:0 auto}
.timeup{background:rgba(240,101,106,.12);border:1px solid rgba(240,101,106,.3);color:var(--bad);padding:12px 16px;border-radius:10px;margin-bottom:18px;text-align:center}
.scorewrap{display:flex;align-items:center;gap:30px;flex-wrap:wrap;justify-content:center;margin:20px 0}
.scorering{--p:0;width:150px;height:150px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:conic-gradient(var(--good) calc(var(--p)*1%),var(--panel3) 0)}
.scorering.fail{background:conic-gradient(var(--bad) calc(var(--p)*1%),var(--panel3) 0)}
.scorering .sc-in{width:118px;height:118px;border-radius:50%;background:var(--bg);display:flex;flex-direction:column;align-items:center;justify-content:center}
.sc-pct{font-size:34px;font-weight:700}.sc-lbl{font-size:13px;color:var(--dim);font-family:var(--mono)}
.sc-verdict{font-size:22px;font-weight:700;display:flex;flex-direction:column}
.sc-verdict.pass{color:var(--good)}.sc-verdict.fail{color:var(--bad)}
.sc-verdict small{font-size:12px;color:var(--faint);font-weight:400;margin-top:4px}
.domrow{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.domrow .dn{flex:1.4;font-size:13.5px;color:var(--dim)}
.domrow .dbar{flex:2;height:8px;background:var(--panel3);border-radius:20px;overflow:hidden}
.domrow .dbar i{display:block;height:100%;background:linear-gradient(90deg,var(--net),var(--accent2))}
.domrow .dp{font-family:var(--mono);font-size:12px;color:var(--ink);min-width:44px;text-align:right}
.revq{border:1px solid var(--line);border-left:3px solid var(--faint);border-radius:8px;padding:15px 17px;margin-bottom:12px;background:var(--panel)}
.revq.ok{border-left-color:var(--good)}.revq.no{border-left-color:var(--bad)}
.rv-top{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.rv-mark{font-weight:700}.revq.ok .rv-mark{color:var(--good)}.revq.no .rv-mark{color:var(--bad)}
.rv-dom{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:.06em;color:var(--faint)}
.rv-stem{font-size:14.5px;font-weight:500;margin-bottom:8px}
.rv-line{font-size:13.5px;color:var(--dim);margin-bottom:4px}.rv-line.correct{color:var(--good)}
.rv-rat{font-size:13px;color:var(--faint);margin-top:8px;padding-top:8px;border-top:1px solid var(--line);line-height:1.6}

/* ---------- exams / study hub cards ---------- */
.examcard{display:flex;flex-direction:column;position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-1);transition:.18s;min-height:190px}
.examcard:hover{border-color:var(--line2);box-shadow:var(--shadow-2);transform:translateY(-3px);text-decoration:none}
.examcard .kind{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);margin-bottom:10px}
.examcard h3{font-size:17px;margin-bottom:6px}
.examcard p{font-size:13.5px;color:var(--dim);flex:1}
.examcard .meta{display:flex;gap:14px;margin:14px 0;font-family:var(--mono);font-size:12px;color:var(--faint)}
.examcard .best{font-size:12px;color:var(--good);margin-bottom:10px;font-family:var(--mono)}

/* ---------- study guide ---------- */
.study-layout{display:grid;grid-template-columns:230px 1fr;gap:30px;align-items:start;max-width:1100px;margin:0 auto}
@media(max-width:820px){.study-layout{grid-template-columns:1fr}}
.study-toc{position:sticky;top:80px;border:1px solid var(--line);border-radius:12px;padding:14px;background:var(--panel)}
.study-toc a{display:block;padding:8px 10px;border-radius:7px;color:var(--dim);font-size:13.5px}
.study-toc a:hover{background:var(--panel2);color:var(--ink);text-decoration:none}
.study-toc a.done::after{content:'✓';color:var(--good);float:right}
.study-domain{border:1px solid var(--line);border-radius:14px;padding:26px 28px;margin-bottom:22px;background:var(--panel);scroll-margin-top:80px}
.study-domain.locked{opacity:.6}
.study-domain h2{font-size:22px;margin-bottom:6px}
.study-domain .dkick{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--net);margin-bottom:12px}
/* .study-domain-body: same domain-content typography, but for the collapsed
   dropdown-tab layout (details.lab-section) — no card border/background of
   its own since .lab-section already provides that. */
.study-domain-body{padding:6px 28px 26px}
.study-domain h3,.study-domain-body h3{font-size:15px;margin:20px 0 8px;color:var(--ink)}
.study-domain h4,.study-domain-body h4{font-size:13.5px;margin:14px 0 4px;color:var(--ink)}
.study-domain p,.study-domain-body p{color:var(--dim);font-size:14.5px;margin-bottom:10px}
.study-domain ul,.study-domain-body ul{margin:0 0 12px 18px;color:var(--dim);font-size:14.5px}
.study-domain li,.study-domain-body li{margin-bottom:5px}
.cheat{width:100%;border-collapse:collapse;margin:12px 0;font-size:13.5px}
.cheat th,.cheat td{border:1px solid var(--line);padding:8px 11px;text-align:left}
.cheat th{background:var(--panel2);color:var(--ink);font-weight:600}
.cheat td{color:var(--dim)}
.tips{background:linear-gradient(180deg,rgba(72,185,208,.07),transparent);border:1px solid rgba(72,185,208,.22);border-radius:10px;padding:14px 16px;margin:14px 0}
.tips b{color:var(--net)}.tips ul{margin:8px 0 0 18px}
.glossary dt{font-weight:600;color:var(--ink);font-size:14px;margin-top:10px}
.glossary dd{color:var(--dim);font-size:13.5px;margin:2px 0 0}
.deep-lock{font-size:12.5px;color:var(--faint);font-style:italic;border-top:1px dashed var(--line);padding-top:12px;margin-top:14px}

.hide{display:none!important}