/* ===========================================================
   EducOnline — Stylesheet responsivo (mobile-first)
   =========================================================== */

:root{
  --azul-900:#0b2447;
  --azul-700:#12406b;
  --azul-500:#1c5b9c;
  --azul-400:#2f7ad1;
  --azul-100:#e7f0fb;
  --laranja:#f5940c;
  --verde:#1f9d55;
  --vermelho:#d64545;
  --cinza-900:#1c2430;
  --cinza-700:#4b5563;
  --cinza-400:#8b96a5;
  --cinza-200:#e3e8ef;
  --cinza-100:#f4f6f9;
  --branco:#ffffff;
  --radius:12px;
  --shadow:0 2px 10px rgba(11,36,71,.08);
  --shadow-lg:0 10px 30px rgba(11,36,71,.15);
  --maxw:1100px;
  --font: 'Segoe UI', system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

*,*::before,*::after{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family:var(--font);
  color:var(--cinza-900);
  background:var(--cinza-100);
  -webkit-font-smoothing:antialiased;
  display:flex;
  flex-direction:column;
  min-height:100vh;
}
img{ max-width:100%; display:block; }
a{ color:var(--azul-500); text-decoration:none; }
a:hover{ text-decoration:underline; }
button, input, select, textarea{ font-family:inherit; font-size:1rem; }

/* ---------- Topbar ---------- */
.topbar{
  background:linear-gradient(135deg, var(--azul-900), var(--azul-700));
  color:var(--branco);
  position:sticky; top:0; z-index:50;
  box-shadow:var(--shadow);
}
.topbar-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:.75rem 1rem;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
}
.brand{ font-size:1.25rem; font-weight:800; letter-spacing:.2px; color:var(--branco); }
.brand:hover{ text-decoration:none; }
.brand-mark{ color:var(--branco); }
.brand-mark2{ color:var(--laranja); }

.hamburger{
  background:transparent; border:0; cursor:pointer;
  width:40px; height:40px; display:flex; flex-direction:column;
  align-items:center; justify-content:center; gap:5px;
}
.hamburger span{ width:22px; height:2px; background:var(--branco); border-radius:2px; }

.mainnav{
  position:fixed; inset:0 0 0 auto; width:78%; max-width:320px;
  background:var(--azul-900);
  transform:translateX(100%);
  transition:transform .25s ease;
  display:flex; flex-direction:column;
  padding:5rem 1.25rem 1.5rem;
  gap:.25rem;
  z-index:60;
}
.mainnav.open{ transform:translateX(0); box-shadow:var(--shadow-lg); }
.mainnav a{ color:var(--branco); padding:.7rem .5rem; border-radius:8px; font-weight:600; }
.mainnav a.active, .mainnav a:hover{ background:rgba(255,255,255,.12); text-decoration:none; }
.mainnav .nav-user{ margin-top:1rem; color:var(--cinza-200); font-size:.9rem; padding:.5rem; }
.mainnav .btn-link{ background:var(--laranja); color:var(--azul-900); text-align:center; border-radius:8px; font-weight:700; }

@media (min-width:820px){
  .hamburger{ display:none; }
  .mainnav{
    position:static; transform:none; width:auto; max-width:none; background:transparent;
    flex-direction:row; align-items:center; padding:0; gap:.25rem;
  }
  .mainnav a{ color:var(--branco); padding:.5rem .75rem; }
  .mainnav a.active, .mainnav a:hover{ background:rgba(255,255,255,.14); }
  .mainnav .nav-user{ margin-top:0; padding:.5rem .75rem 0.5rem 1rem; }
  .mainnav .btn-link{ padding:.45rem .9rem; }
}

/* ---------- Layout ---------- */
.content{ flex:1; width:100%; max-width:var(--maxw); margin:0 auto; padding:1.25rem 1rem 3rem; }
.footer{ text-align:center; color:var(--cinza-400); font-size:.82rem; padding:1.5rem 1rem; }

.page-title{ font-size:1.4rem; margin:.2rem 0 1.1rem; color:var(--azul-900); }
.page-subtitle{ color:var(--cinza-700); margin-top:-.6rem; margin-bottom:1.3rem; }

/* ---------- Auth pages ---------- */
.auth-wrap{
  min-height:calc(100vh - 64px);
  display:flex; align-items:center; justify-content:center;
  padding:2rem 1rem;
}
.auth-card{
  width:100%; max-width:420px;
  background:var(--branco);
  border-radius:var(--radius);
  box-shadow:var(--shadow-lg);
  padding:2rem 1.75rem;
}
.auth-card h1{ margin:0 0 .3rem; font-size:1.5rem; color:var(--azul-900); text-align:center; }
.auth-card p.lead{ text-align:center; color:var(--cinza-700); margin:0 0 1.5rem; font-size:.95rem; }
.field{ margin-bottom:1rem; }
.field label{ display:block; font-weight:600; font-size:.88rem; margin-bottom:.35rem; color:var(--cinza-900); }
.field input{
  width:100%; padding:.7rem .8rem; border:1.5px solid var(--cinza-200);
  border-radius:8px; background:var(--cinza-100); transition:border-color .15s;
}
.field input:focus{ outline:none; border-color:var(--azul-400); background:var(--branco); }
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.4rem;
  width:100%; padding:.8rem 1rem; border:none; border-radius:8px;
  font-weight:700; cursor:pointer; transition:filter .15s, transform .05s;
}
.btn:active{ transform:translateY(1px); }
.btn-primary{ background:var(--azul-500); color:var(--branco); }
.btn-primary:hover{ filter:brightness(1.08); }
.btn-accent{ background:var(--laranja); color:var(--azul-900); }
.btn-accent:hover{ filter:brightness(1.06); }
.btn-outline{ background:transparent; border:1.5px solid var(--azul-500); color:var(--azul-500); }
.btn-danger{ background:var(--vermelho); color:var(--branco); }
.btn-sm{ padding:.5rem .8rem; width:auto; font-size:.88rem; border-radius:7px; }

.auth-foot{ text-align:center; margin-top:1.2rem; font-size:.92rem; color:var(--cinza-700); }
.alert{ padding:.75rem .9rem; border-radius:8px; font-size:.9rem; margin-bottom:1rem; }
.alert-error{ background:#fdeaea; color:#8a1f1f; border:1px solid #f3c4c4; }
.alert-success{ background:#e8f7ee; color:#146c33; border:1px solid #bfe9cf; }

/* ---------- Filtros / tabs ---------- */
.tabs{ display:flex; gap:.5rem; flex-wrap:wrap; margin-bottom:1.25rem; }
.tabs a{
  padding:.5rem 1rem; border-radius:999px; background:var(--branco);
  border:1.5px solid var(--cinza-200); color:var(--cinza-700); font-weight:600; font-size:.9rem;
}
.tabs a.active{ background:var(--azul-500); border-color:var(--azul-500); color:var(--branco); }

/* ---------- Cards de prova ---------- */
.grid-cards{
  display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:1rem;
}
.card-prova{
  background:var(--branco); border-radius:var(--radius); box-shadow:var(--shadow);
  padding:1.1rem 1.2rem; transition:transform .12s, box-shadow .12s;
}
.card-prova:hover{ transform:translateY(-3px); box-shadow:var(--shadow-lg); text-decoration:none; }
.tag{ display:inline-block; font-size:.72rem; font-weight:700; letter-spacing:.4px;
  text-transform:uppercase; padding:.2rem .55rem; border-radius:999px;
  background:var(--azul-100); color:var(--azul-700); margin-bottom:.5rem; }
.tag-alt{ background:#fff2e0; color:#9a5b00; }
.card-prova h3{ margin:.1rem 0 .2rem; font-size:1.05rem; color:var(--cinza-900); }
.card-prova .meta{ color:var(--cinza-700); font-size:.85rem; }
.card-prova .go{ margin-top:.7rem; font-weight:700; color:var(--azul-500); font-size:.88rem; }

.empty-state{ text-align:center; padding:3rem 1rem; color:var(--cinza-700); }

/* ---------- Grade de questões (números) ---------- */
.questoes-grid{
  display:grid; grid-template-columns:repeat(auto-fill,minmax(56px,1fr)); gap:.55rem;
  margin:1rem 0 2rem;
}
.q-num{
  display:flex; align-items:center; justify-content:center;
  aspect-ratio:1/1; border-radius:10px; background:var(--branco);
  border:1.5px solid var(--cinza-200); font-weight:700; color:var(--cinza-700);
  position:relative;
}
.q-num:hover{ border-color:var(--azul-400); text-decoration:none; color:var(--azul-500); }
.q-num.marcada{ border-color:var(--laranja); }
.q-num.marcada::after{
  content:"✓"; position:absolute; top:-6px; right:-6px; background:var(--laranja);
  color:var(--branco); width:18px; height:18px; border-radius:50%; font-size:.65rem;
  display:flex; align-items:center; justify-content:center;
}

/* ---------- Viewer da questão ---------- */
.viewer{
  background:var(--branco); border-radius:var(--radius); box-shadow:var(--shadow);
  padding:1.2rem; margin-bottom:1.5rem;
}
.viewer-head{
  display:flex; justify-content:space-between; align-items:flex-start; gap:1rem;
  flex-wrap:wrap; margin-bottom:.9rem;
}
.viewer-head h2{ margin:0; font-size:1.1rem; color:var(--azul-900); }
.viewer-head .subtitulo{ color:var(--cinza-700); font-size:.86rem; margin-top:.15rem; }
.viewer-nav{ display:flex; gap:.5rem; }
.viewer-nav .btn{ width:auto; padding:.5rem .9rem; }

.viewer-img-wrap{
  background:var(--cinza-100); border-radius:10px; padding:.75rem;
  text-align:center; margin-bottom:1rem; overflow:auto;
}
.viewer-img-wrap img{ margin:0 auto; border-radius:6px; }

.resposta-form{ display:flex; gap:.6rem; flex-wrap:wrap; align-items:flex-end; margin-bottom:.8rem; }
.resposta-form .field{ margin:0; flex:1; min-width:140px; }
.resposta-form .btn{ width:auto; }

.feedback{ display:flex; gap:1rem; align-items:center; flex-wrap:wrap; padding:.9rem; border-radius:10px; margin-bottom:1rem; }
.feedback.correta{ background:#e8f7ee; }
.feedback.incorreta{ background:#fdeaea; }
.feedback img{ width:90px; border-radius:8px; }
.feedback strong{ font-size:1.05rem; }

.solucao-toggle{ display:flex; gap:.5rem; flex-wrap:wrap; margin-bottom:1rem; }

.checkbox-marcar{ display:flex; align-items:center; gap:.5rem; font-weight:600; color:var(--cinza-700); }
.checkbox-marcar input{ width:18px; height:18px; }

/* ---------- Assuntos (checkboxes) ---------- */
.assuntos-list{
  background:var(--branco); border-radius:var(--radius); box-shadow:var(--shadow);
  padding:1.2rem; display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:.5rem .9rem; margin-bottom:1.2rem;
}
.assunto-item{ display:flex; align-items:center; gap:.5rem; font-size:.92rem; }
.assunto-item input{ width:16px; height:16px; }

/* ---------- Apostila (impressão) ---------- */
.apostila-item{
  background:var(--branco); border-radius:var(--radius); box-shadow:var(--shadow);
  padding:1rem; margin-bottom:1rem;
}
.apostila-item h4{ margin:.1rem 0 .6rem; color:var(--azul-900); }
.apostila-toolbar{ display:flex; gap:.6rem; flex-wrap:wrap; margin-bottom:1.2rem; }
.apostila-toolbar .btn{ width:auto; }

@media print{
  .topbar, .footer, .apostila-toolbar, .btn-remover{ display:none !important; }
  body{ background:var(--branco); }
  .content{ max-width:none; padding:0; }
  .apostila-item{ box-shadow:none; border:1px solid #ccc; page-break-inside:avoid; }
}

/* ---------- Utilidades ---------- */
.flex-between{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:.6rem; }
.small{ font-size:.85rem; color:var(--cinza-700); }
.mt-1{ margin-top:1rem; } .mb-1{ margin-bottom:1rem; }