/* ============ EMED Banco de Questões — estilo ============ */
:root{
  --bg:#f4f7fb; --bg-soft:#eaf0f8; --card:#ffffff; --card-2:#f8fafc;
  --text:#10202e; --muted:#5b6b7c; --line:#e2e9f1;
  --brand:#0e7c86; --brand-2:#14b8a6; --brand-ink:#075e67;
  --accent:#2563eb; --good:#16a34a; --good-bg:#e7f6ec; --bad:#dc2626; --bad-bg:#fdecec;
  --warn:#d97706; --shadow:0 1px 3px rgba(16,32,46,.06),0 8px 24px rgba(16,32,46,.06);
  --shadow-lg:0 12px 40px rgba(16,32,46,.14);
  --r:16px; --r-sm:10px; --maxw:1180px;
}
[data-theme="dark"]{
  --bg:#0c141d; --bg-soft:#111c27; --card:#15212e; --card-2:#1a2836;
  --text:#e7eef6; --muted:#9fb0c0; --line:#243446;
  --brand:#2dd4bf; --brand-2:#14b8a6; --brand-ink:#5eead4;
  --accent:#60a5fa; --good:#4ade80; --good-bg:#13301f; --bad:#f87171; --bad-bg:#3a1717;
  --shadow:0 1px 3px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.35);
  --shadow-lg:0 12px 40px rgba(0,0,0,.5);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
button{font-family:inherit;cursor:pointer}

/* ---------- Topbar ---------- */
.topbar{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--card) 88%,transparent);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.topbar-inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:18px;
  padding:12px 20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;white-space:nowrap}
.brand-logo{font-size:1.5rem;filter:drop-shadow(0 2px 4px rgba(0,0,0,.15))}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-text small{font-size:.62rem;font-weight:500;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-top:3px}
.topbar-search{flex:1;max-width:520px;position:relative;display:flex;align-items:center}
.topbar-search .search-ic{position:absolute;left:14px;width:18px;height:18px;fill:none;
  stroke:var(--muted);stroke-width:2;stroke-linecap:round}
#globalSearch{width:100%;padding:11px 14px 11px 42px;border:1px solid var(--line);
  background:var(--card-2);color:var(--text);border-radius:999px;font-size:.92rem;outline:none;transition:.2s}
#globalSearch:focus{border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 22%,transparent)}
.theme-toggle{background:var(--card-2);border:1px solid var(--line);width:40px;height:40px;
  border-radius:50%;font-size:1.1rem;display:grid;place-items:center;transition:.2s;flex-shrink:0}
.theme-toggle:hover{transform:translateY(-1px);box-shadow:var(--shadow)}

/* ---------- Layout ---------- */
main{max-width:var(--maxw);margin:0 auto;padding:28px 20px 60px;min-height:60vh}
.loading{display:flex;flex-direction:column;align-items:center;gap:16px;padding:80px 0;color:var(--muted)}
.spinner{width:42px;height:42px;border:4px solid var(--line);border-top-color:var(--brand);
  border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(135deg,var(--brand-ink),var(--brand) 55%,var(--brand-2));
  border-radius:var(--r);padding:44px 38px;color:#fff;position:relative;overflow:hidden;
  box-shadow:var(--shadow-lg);margin-bottom:30px}
.hero::after{content:"";position:absolute;right:-60px;top:-60px;width:300px;height:300px;
  background:radial-gradient(circle,rgba(255,255,255,.20),transparent 70%);border-radius:50%}
.hero::before{content:"";position:absolute;left:-40px;bottom:-80px;width:240px;height:240px;
  background:radial-gradient(circle,rgba(255,255,255,.10),transparent 70%);border-radius:50%}
.hero h1{margin:0 0 10px;font-size:2.25rem;font-weight:800;letter-spacing:-.02em;position:relative;z-index:1}
.hero p{margin:0;max-width:640px;opacity:.95;font-size:1.04rem;position:relative;z-index:1}
.hero-stats{display:flex;gap:18px;margin-top:28px;flex-wrap:wrap;position:relative;z-index:1}
.hero-stat{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);
  border-radius:12px;padding:12px 18px;backdrop-filter:blur(4px);min-width:96px}
.hero-stat b{display:block;font-size:1.75rem;font-weight:800;line-height:1.1}
.hero-stat span{font-size:.78rem;opacity:.9;text-transform:uppercase;letter-spacing:.05em}

/* ---------- Section ---------- */
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin:34px 0 16px;gap:12px}
.section-head h2{margin:0;font-size:1.32rem;font-weight:700;letter-spacing:-.01em}
.section-head .muted{font-size:.86rem}
.muted{color:var(--muted)}

/* ---------- Grid de especialidades ---------- */
.esp-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:16px}
.esp-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:20px;display:flex;flex-direction:column;gap:10px;transition:.18s;box-shadow:var(--shadow);position:relative;overflow:hidden}
.esp-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--ec,var(--brand));opacity:.9}
.esp-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--brand) 40%,var(--line))}
.esp-ic{font-size:1.7rem;width:46px;height:46px;display:grid;place-items:center;border-radius:12px;
  background:color-mix(in srgb,var(--ec,var(--brand)) 14%,transparent)}
.esp-card h3{margin:0;font-size:1.05rem;font-weight:700}
.esp-card .count{font-size:.85rem;color:var(--muted);margin-top:auto}
.esp-card .count b{color:var(--ec,var(--brand));font-size:1.15rem}

/* ---------- Filtros / toolbar ---------- */
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:20px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;box-shadow:var(--shadow)}
.toolbar select,.toolbar input{padding:9px 12px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--card-2);color:var(--text);font-size:.88rem;outline:none}
.toolbar select:focus,.toolbar input:focus{border-color:var(--brand)}
.toolbar .grow{flex:1;min-width:160px}
.chip{padding:6px 12px;border-radius:999px;border:1px solid var(--line);background:var(--card-2);
  font-size:.82rem;color:var(--muted);transition:.15s}
.chip.active,.chip:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn{padding:9px 16px;border-radius:var(--r-sm);border:1px solid var(--brand);background:var(--brand);
  color:#fff;font-weight:600;font-size:.88rem;transition:.15s}
.btn:hover{filter:brightness(1.07);transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--brand)}

/* ---------- Breadcrumb ---------- */
.crumb{display:flex;align-items:center;gap:8px;font-size:.86rem;color:var(--muted);margin-bottom:18px;flex-wrap:wrap}
.crumb a:hover{color:var(--brand)}
.crumb span.sep{opacity:.5}

/* ---------- Lista de temas ---------- */
.tema-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.tema-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:15px 17px;display:flex;justify-content:space-between;align-items:center;gap:10px;
  transition:.15s;box-shadow:var(--shadow)}
.tema-card:hover{transform:translateX(3px);border-color:var(--brand)}
.tema-card .tn{font-weight:600;font-size:.95rem}
.tema-card .badge{background:color-mix(in srgb,var(--brand) 14%,transparent);color:var(--brand);
  font-weight:700;font-size:.8rem;padding:3px 10px;border-radius:999px;white-space:nowrap}

/* ---------- Questões ---------- */
.qcount{font-size:.86rem;color:var(--muted);margin-bottom:14px}
.qcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:22px 24px;margin-bottom:18px;box-shadow:var(--shadow)}
.qmeta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px;align-items:center}
.tag{font-size:.74rem;font-weight:600;padding:3px 9px;border-radius:6px;letter-spacing:.02em}
.tag.esp{background:color-mix(in srgb,var(--brand) 16%,transparent);color:var(--brand-ink)}
[data-theme="dark"] .tag.esp{color:var(--brand)}
.tag.ano{background:color-mix(in srgb,var(--accent) 16%,transparent);color:var(--accent)}
.tag.tema{background:var(--card-2);color:var(--muted);border:1px solid var(--line)}
.qinst{font-size:.78rem;color:var(--muted);margin-left:auto;text-align:right;max-width:55%}
.qnum{font-weight:700;color:var(--brand);margin-right:6px}
.enun{font-family:'Lora',Georgia,serif;font-size:1.06rem;line-height:1.7;margin-bottom:6px}
.enun p{margin:0 0 .7em}.enun p:last-child{margin-bottom:0}
.enun .ct-sub{font-weight:600;color:var(--text)}
.enun .ct-list{margin:.4em 0 .8em;padding-left:1.3em}
.enun .ct-list li{margin:.25em 0}
.qimgs{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}
.qimgs img{max-height:230px;border:1px solid var(--line);border-radius:10px;cursor:zoom-in;
  background:#fff;transition:.15s}
.qimgs img:hover{transform:scale(1.02);box-shadow:var(--shadow)}
.alts{list-style:none;padding:0;margin:16px 0 0;display:flex;flex-direction:column;gap:9px}
.alt{display:flex;gap:12px;padding:12px 15px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--card-2);cursor:pointer;transition:.13s;font-size:.97rem;align-items:flex-start}
.alt:hover{border-color:var(--brand);background:color-mix(in srgb,var(--brand) 6%,var(--card-2))}
.alt .letter{font-weight:700;width:26px;height:26px;flex-shrink:0;display:grid;place-items:center;
  border-radius:50%;background:var(--card);border:1px solid var(--line);font-size:.85rem}
.alt.correct{border-color:var(--good);background:var(--good-bg)}
.alt.correct .letter{background:var(--good);color:#fff;border-color:var(--good)}
.alt.wrong{border-color:var(--bad);background:var(--bad-bg)}
.alt.wrong .letter{background:var(--bad);color:#fff;border-color:var(--bad)}
.alt.disabled{cursor:default}
.qactions{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.reveal{margin-top:16px;border-top:1px dashed var(--line);padding-top:16px;display:none}
.reveal.show{display:block;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(-4px)}to{opacity:1}}
.gabarito{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--good);
  background:var(--good-bg);padding:7px 14px;border-radius:8px;margin-bottom:12px}
.gabarito b{font-weight:800}

/* ---------- Comentário do professor (texto rico) ---------- */
.coment-h{display:flex;align-items:center;gap:8px;font-weight:700;margin:16px 0 8px;color:var(--brand);
  font-size:.82rem;text-transform:uppercase;letter-spacing:.06em}
.coment-h::before{content:"🩺";font-size:1rem}
.coment{font-size:.97rem;line-height:1.72;color:var(--text);
  background:var(--card-2);border:1px solid var(--line);border-left:3px solid var(--brand);
  border-radius:var(--r-sm);padding:16px 20px}
.coment p{margin:0 0 .85em}
.coment p:last-child{margin-bottom:0}
.coment .ct-gab{font-weight:700;color:var(--good);background:var(--good-bg);
  display:inline-block;padding:5px 12px;border-radius:8px;margin:0 0 12px}
.coment .ct-sub{font-weight:700;color:var(--brand-ink);margin-top:.4em;font-size:1.0rem}
[data-theme="dark"] .coment .ct-sub{color:var(--brand)}
.coment .ct-key{color:var(--brand-ink);font-weight:700}
[data-theme="dark"] .coment .ct-key{color:var(--brand-2)}
.coment .ct-list{margin:.3em 0 .9em;padding-left:1.35em}
.coment .ct-list li{margin:.3em 0;padding-left:.15em}
.coment .ct-list li::marker{color:var(--brand)}

/* ---------- Paginação ---------- */
.pager{display:flex;justify-content:center;align-items:center;gap:8px;margin:30px 0 0;flex-wrap:wrap}
.pager button{min-width:40px;padding:8px 12px;border:1px solid var(--line);background:var(--card);
  color:var(--text);border-radius:8px;font-weight:600;transition:.13s}
.pager button:hover:not(:disabled){border-color:var(--brand);color:var(--brand)}
.pager button.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.pager button:disabled{opacity:.4;cursor:default}

/* ---------- Empty ---------- */
.empty{text-align:center;padding:70px 20px;color:var(--muted)}
.empty .big{font-size:3rem;margin-bottom:10px}

/* ---------- Lightbox ---------- */
.lightbox{position:fixed;inset:0;background:rgba(4,12,20,.92);z-index:200;display:none;
  align-items:center;justify-content:center;padding:30px}
.lightbox.show{display:flex;animation:fade .2s}
.lightbox img{max-width:96vw;max-height:92vh;border-radius:8px;background:#fff}
.lb-close{position:absolute;top:18px;right:24px;background:rgba(255,255,255,.15);color:#fff;
  border:none;width:44px;height:44px;border-radius:50%;font-size:1.3rem}
.lb-close:hover{background:rgba(255,255,255,.3)}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--line);background:var(--card);margin-top:40px}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:26px 20px;font-size:.85rem}
.footer-inner p{margin:4px 0}

/* ---------- Responsivo ---------- */
@media(max-width:680px){
  .hero{padding:28px 22px}.hero h1{font-size:1.6rem}
  .topbar-inner{flex-wrap:wrap;gap:12px}
  .topbar-search{order:3;max-width:none;flex-basis:100%}
  .qinst{max-width:100%;text-align:left;margin-left:0;width:100%}
  .qmeta{gap:6px}
  .qcard{padding:18px 16px}
  .enun{font-size:1rem}
}