/* Stilul comun al site-ului Laboratoare Virtuale — aceeași paletă ca laboratoarele (CLAUDE.md),
   fără fonturi web: doar fonturile sistemului, ca site-ul să meargă și offline. */
:root{
  --paper:#e9ede8; --sheet:#f6f8f5; --card:#ffffff; --ink:#1f2b2e; --muted:#5b6869; --rule:#cfd6d0;
  --enamel:#3e6b5e; --enamel-dk:#2c5046; --enamel-soft:#dbe7e1; --amber:#e8a100; --amber-soft:#fbefcf; --amber-ink:#7a5600;
  --ok:#2f7d4e; --ok-soft:#dcefe2; --bad:#b83227;
  --display:Bahnschrift,"DIN Alternate","Arial Narrow","Segoe UI",system-ui,sans-serif;
  --body:"Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:Consolas,"SFMono-Regular",Menlo,"Courier New",monospace;
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --paper:#141a19; --sheet:#1b2321; --card:#212b29; --ink:#e4ebe7; --muted:#9aa8a4; --rule:#33403d;
  --enamel:#7fb3a2; --enamel-dk:#a6d0c2; --enamel-soft:#24342f; --amber:#f0b739; --amber-soft:#3a3018; --amber-ink:#f3cf7a;
  --ok:#7cc79a; --ok-soft:#1d3427; --bad:#ef8a80; color-scheme:dark } }
:root[data-theme="dark"]{
  --paper:#141a19; --sheet:#1b2321; --card:#212b29; --ink:#e4ebe7; --muted:#9aa8a4; --rule:#33403d;
  --enamel:#7fb3a2; --enamel-dk:#a6d0c2; --enamel-soft:#24342f; --amber:#f0b739; --amber-soft:#3a3018; --amber-ink:#f3cf7a;
  --ok:#7cc79a; --ok-soft:#1d3427; --bad:#ef8a80; color-scheme:dark }
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%} @media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto} }
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 var(--body);overflow-wrap:break-word}
.w{max-width:1180px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
h1,h2,h3,h4{font-family:var(--display);margin:0}
h1{font-size:clamp(1.9rem,4.4vw,2.8rem);line-height:1.1;font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.15;font-weight:600}
h3{font-size:1.12rem;font-weight:600}
a{color:var(--enamel-dk)}
.eyebrow{font:600 .75rem/1.2 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--enamel)}
.muted{color:var(--muted)}
.lead{font-size:1.12rem;max-width:36em;margin:16px 0 22px}
button,.btn{font:600 .95rem var(--body);border-radius:8px;padding:10px 16px;border:1.5px solid var(--ink);background:var(--card);color:var(--ink);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:8px;line-height:1.2}
.btn.go{background:var(--enamel);border-color:var(--enamel);color:#fff}
:root[data-theme="dark"] .btn.go{color:var(--paper)}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .btn.go{color:var(--paper)} }
:focus-visible{outline:3px solid var(--amber);outline-offset:2px}
section{padding-block:48px}
.page-head{padding-block:40px 8px}
.page-head p{max-width:42em}

/* antet */
.skip{position:absolute;left:-999px;top:0;background:var(--amber);color:#000;padding:8px 12px;z-index:20}
.skip:focus{left:8px}
header.top{position:sticky;top:0;z-index:5;background:var(--sheet);border-bottom:1px solid var(--rule)}
header.top .w{display:flex;align-items:center;gap:12px 20px;padding-block:10px;flex-wrap:wrap}
.logo{font:700 1.2rem var(--display);display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}
.logo svg{flex:none}
nav.main{display:flex;gap:6px 18px;flex-wrap:wrap;margin-left:auto;align-items:center}
nav.main a{color:var(--ink);text-decoration:none;font-weight:500;padding:4px 0}
nav.main a:hover{color:var(--enamel)}
nav.main a[aria-current="page"]{color:var(--enamel-dk);box-shadow:inset 0 -2px 0 var(--enamel)}
#theme{padding:5px 9px;font-size:.85rem;border-width:1px}
@media (max-width:640px){ nav.main{margin-left:0;width:100%;gap:4px 14px} }

/* pagina principală */
.hero{padding-block:44px 36px}
.hero .w{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:40px;align-items:center}
@media (max-width:880px){ .hero .w{grid-template-columns:1fr} }
.hero h1{font-size:clamp(2.1rem,5vw,3.4rem);line-height:1.05;letter-spacing:-.02em;margin-top:12px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.facts{display:flex;gap:28px;flex-wrap:wrap;margin-top:28px}
.facts b{display:block;font:600 1.7rem var(--mono)}
.facts span{font-size:.88rem;color:var(--muted)}
.bench{background:var(--card);border:1px solid var(--rule);border-radius:14px;padding:18px;min-width:0}
.bench canvas{width:100%;height:auto;display:block;border-radius:8px;background:var(--sheet)}
.bench .cap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:center;margin-top:12px;font-size:.9rem}
.bench .readout{font:600 .95rem var(--mono)}
.bench label{display:flex;gap:8px;align-items:center}
.bench input[type=range]{accent-color:var(--enamel);max-width:150px}
.band{background:var(--sheet);border-block:1px solid var(--rule)}
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:22px}
@media (max-width:880px){ .steps{grid-template-columns:1fr} }
.step{display:flex;gap:14px}
.step .n{font:600 1.4rem var(--mono);color:var(--enamel);flex:none;width:2ch}
.step p{margin:6px 0 0;font-size:.95rem}
code{font:600 .85em var(--mono);background:var(--amber-soft);padding:1px 5px;border-radius:4px;color:var(--amber-ink);overflow-wrap:anywhere}
.discs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:22px}
@media (max-width:760px){ .discs{grid-template-columns:1fr} }
.disc{background:var(--card);border:1px solid var(--rule);border-radius:12px;padding:18px;text-decoration:none;color:var(--ink);display:block}
.disc:hover{border-color:var(--enamel)}
.disc b{font:600 1.5rem var(--mono);color:var(--enamel)}
.disc p{margin:6px 0 0;font-size:.9rem;color:var(--muted)}

/* catalog */
.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:18px 0 8px}
.seg{display:flex;flex-wrap:wrap;border:1.5px solid var(--ink);border-radius:9px;overflow:hidden}
.seg button{border:0;border-radius:0;background:transparent;padding:8px 14px;font-weight:600}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--paper)}
.filters input[type=search]{font:inherit;padding:8px 12px;border:1.5px solid var(--ink);border-radius:8px;background:var(--card);color:var(--ink);min-width:0;flex:1 1 220px;max-width:340px}
.filters label.chk{display:flex;gap:6px;align-items:center;font-size:.92rem}
.filters select{font:inherit;padding:7px 8px;border-radius:8px;border:1.5px solid var(--ink);background:var(--card);color:var(--ink)}
#count{font-size:.9rem}
.topic{margin-top:26px}
.topic h3{display:flex;gap:10px;align-items:baseline;flex-wrap:wrap;margin-bottom:12px}
.topic h3 small{font:400 .82rem var(--mono);color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.lab{background:var(--card);border:1px solid var(--rule);border-radius:10px;padding:14px;display:flex;flex-direction:column;gap:8px;min-width:0}
.lab h4{font:600 1.02rem/1.3 var(--display)}
.lab h4 a{color:var(--ink);text-decoration:none}
.lab h4 a:hover{color:var(--enamel-dk);text-decoration:underline}
.lab p{margin:0;font-size:.88rem;color:var(--muted)}
.tags{display:flex;flex-wrap:wrap;gap:5px;margin-top:auto}
.tag{font:500 .72rem var(--mono);padding:2px 7px;border-radius:999px;border:1px solid var(--rule);color:var(--muted)}
.tag.free{background:var(--ok-soft);border-color:var(--ok);color:var(--ok)}
.tag.eval{background:var(--amber-soft);border-color:var(--amber);color:var(--amber-ink)}
.tag.fisa{background:var(--enamel-soft);border-color:var(--enamel);color:var(--enamel-dk)}
.lab .acts{display:flex;gap:6px 14px;flex-wrap:wrap;font-size:.88rem;font-weight:600}
.lock{color:var(--muted);font-weight:500}
.empty{padding:24px;border:1px dashed var(--rule);border-radius:10px;color:var(--muted)}
[hidden]{display:none!important}

/* pagina unui laborator */
.crumbs{font-size:.88rem;color:var(--muted);margin-bottom:12px}
.crumbs a{color:var(--muted)}
.labhead{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:28px;align-items:start}
@media (max-width:880px){ .labhead{grid-template-columns:1fr} }
.box{background:var(--card);border:1px solid var(--rule);border-radius:12px;padding:18px;min-width:0}
.box h2{font-size:1.2rem;margin-bottom:10px}
.box .cta{flex-direction:column}
.box .cta .btn{justify-content:center}
ul.ticks{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
ul.ticks li{display:flex;gap:8px}
ul.ticks li::before{content:"✓";color:var(--ok);font-weight:700;flex:none}
.cols2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;margin-top:22px}
@media (max-width:880px){ .cols2{grid-template-columns:1fr} }
.fisa-item{border-top:1px solid var(--rule);padding-top:12px;margin-top:12px}
.fisa-item:first-of-type{border-top:0;padding-top:0;margin-top:0}
.fisa-item h3{font-size:1.02rem}
.fisa-item p{margin:4px 0 6px;font-size:.92rem}
.related{display:flex;flex-wrap:wrap;gap:8px}
.related a{font-size:.9rem;background:var(--card);border:1px solid var(--rule);border-radius:999px;padding:4px 12px;text-decoration:none}
.related a:hover{border-color:var(--enamel)}

/* prețuri */
.billing{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin:18px 0 24px}
.offer{background:var(--amber-soft);border:1px solid var(--amber);color:var(--amber-ink);border-radius:10px;padding:12px 16px;font-size:.95rem;margin-bottom:22px}
.plans{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
@media (max-width:1040px){ .plans{grid-template-columns:repeat(2,minmax(0,1fr))} }
@media (max-width:560px){ .plans{grid-template-columns:1fr} }
.plan{background:var(--card);border:1px solid var(--rule);border-radius:12px;padding:20px;display:flex;flex-direction:column;gap:12px;min-width:0}
.plan.best{border:2px solid var(--enamel);position:relative}
.plan.best .badge{position:absolute;top:-12px;left:18px;background:var(--enamel);color:var(--paper);font:600 .72rem var(--mono);padding:3px 9px;border-radius:999px}
.plan .who{font-size:.9rem;color:var(--muted);min-height:2.8em}
.price{font:600 2.1rem/1 var(--mono);font-variant-numeric:tabular-nums}
.price small{font:400 .85rem var(--body);color:var(--muted)}
.price-alt{font-size:.82rem;color:var(--muted);min-height:1.3em}
.plan ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:7px;font-size:.92rem}
.plan li{display:flex;gap:8px}
.plan li::before{content:"✓";color:var(--ok);font-weight:700;flex:none}
.plan li.no{color:var(--muted)} .plan li.no::before{content:"–";color:var(--muted)}
.plan .btn{justify-content:center;margin-top:auto}
.plan select{font:inherit;padding:6px 8px;border-radius:7px;border:1.5px solid var(--ink);background:var(--card);color:var(--ink)}
.disclaimer{font-size:.85rem;color:var(--muted);margin-top:16px}
.faq{max-width:46em}
.faq h3{margin-top:22px}
.faq p{margin:6px 0 0}

/* lista de așteptare */
form.wait{display:grid;gap:14px;max-width:560px}
form.wait label{display:flex;flex-direction:column;gap:4px;font-weight:600;font-size:.95rem}
form.wait label span{font-weight:400;color:var(--muted);font-size:.85rem}
form.wait input,form.wait select,form.wait textarea{font:inherit;font-weight:400;padding:9px 11px;border:1.5px solid var(--ink);border-radius:8px;background:var(--card);color:var(--ink);width:100%}
form.wait fieldset{border:1px solid var(--rule);border-radius:8px;padding:10px 14px;margin:0}
form.wait legend{font-weight:600;font-size:.95rem;padding:0 4px}
form.wait fieldset label{flex-direction:row;align-items:center;gap:8px;font-weight:400;display:inline-flex;margin-right:14px}
form.wait fieldset input{width:auto}
form.wait .btn{justify-self:start}
.notice{background:var(--amber-soft);border:1px solid var(--amber);color:var(--amber-ink);border-radius:10px;padding:12px 16px;font-size:.95rem;max-width:560px}
.done{background:var(--ok-soft);border:1px solid var(--ok);color:var(--ink);border-radius:10px;padding:14px 16px;max-width:560px}
.prose{max-width:44em}
.prose h2{margin-top:30px;font-size:1.4rem}
.prose p,.prose li{font-size:1rem}

footer{border-top:1px solid var(--rule);padding-block:28px;font-size:.88rem;color:var(--muted);margin-top:24px}
footer .w{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer a{color:var(--muted)}
footer nav{display:flex;gap:14px;flex-wrap:wrap}

/* contul profesorului: intrare, contul meu, administrare (functions/ pe Cloudflare Pages) */
.narrow{max-width:520px}
form.form{display:grid;gap:12px;margin:18px 0}
form.form.grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));max-width:none}
form.form label{display:flex;flex-direction:column;gap:4px;font-weight:600;font-size:.95rem}
form.form input,form.form select{font:inherit;font-weight:400;padding:9px 11px;border:1.5px solid var(--ink);border-radius:8px;background:var(--card);color:var(--ink);width:100%}
form.form .btn{justify-self:start}
.form-err{color:var(--bad);font-weight:600;margin:0}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0 0 14px}
.kv dt{color:var(--muted)}
.kv dd{margin:0;font-weight:600}
.tbl{border-collapse:collapse;width:100%;font-size:.92rem}
.tbl th,.tbl td{text-align:left;padding:7px 10px;border-bottom:1px solid var(--rule);white-space:nowrap}
.tbl th{color:var(--muted);font-weight:600}
.acces-msg{background:var(--amber-soft);border:1px solid var(--amber);color:var(--amber-ink);border-radius:8px;padding:10px 12px;font-size:.92rem;margin-bottom:12px}
.fisa-item .dl{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.fisa-item .dl a{font-size:.85rem;padding:5px 10px}
.btn.off{opacity:.55}
.ok-tag{color:var(--ok);font-weight:600}