/* =====================================================================
   DESIGN SYSTEM COMPARTILHADO — usado por index.html e app.html
   Editar este arquivo muda a aparência de TODOS os módulos de uma vez.
   ===================================================================== */
:root{
  --bg: #0f1a14;
  --panel: #1c2e22;
  --panel-2: #223828;
  --border: #2e4a37;
  --text: #eaf2ec;
  --text-dim: #a9c2b1;
  --accent: #6fcf7d;
  --accent-2: #f4b942;
  --accent-3: #4fa3d1;
  --danger: #e2685f;
  --ok: #6fcf7d;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --nav-h: 64px;
  --font-size-base: clamp(14px, 1.4vw + 10px, 16px);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background: radial-gradient(1200px 800px at 10% -10%, #1c3324 0%, var(--bg) 55%), var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: var(--font-size-base);
  min-height: 100vh;
  padding-bottom: 40px;
}
.wrap{ max-width: 960px; margin: 0 auto; padding: 16px 14px 90px; }
a{ color: var(--accent-3); }

/* ---- Topbar (app.html) ---- */
header.topbar{
  display:flex; align-items:center; justify-content:space-between;
  gap:12px; flex-wrap: wrap;
  padding: 14px 18px;
  background: linear-gradient(135deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  position: sticky; top: 8px; z-index: 20;
}
.brand{ display:flex; align-items:center; gap:10px; min-width:0; }
.brand .logo{
  width:42px; height:42px; border-radius:12px; flex-shrink:0;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  display:flex; align-items:center; justify-content:center;
  font-size:22px;
}
.brand h1{ font-size:15px; margin:0; line-height:1.2; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.brand p{ margin:0; font-size:11px; color: var(--text-dim); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.brand a.back{ color: var(--text-dim); text-decoration:none; font-size:20px; margin-right:2px; }

.stats{ display:flex; gap:8px; flex-wrap:wrap; align-items:center; }
.pill{
  background: rgba(255,255,255,0.04); border: 1px solid var(--border);
  border-radius: 999px; padding: 6px 11px; font-size: 12px;
  display:flex; align-items:center; gap:5px; white-space:nowrap;
}
.pill b{ color: var(--accent-2); }

/* ---- Nav: tabs no desktop, bottom bar fixa no mobile ---- */
nav.tabs{ display:flex; gap:8px; margin-bottom: 18px; flex-wrap:wrap; }
nav.tabs button{
  flex:1; min-width: 100px;
  background: var(--panel); border: 1px solid var(--border); color: var(--text-dim);
  padding: 10px 8px; border-radius: 12px; cursor:pointer;
  font-size: 12.5px; font-weight:600;
  display:flex; flex-direction:column; align-items:center; gap:3px;
  position:relative; transition: all .15s ease;
}
nav.tabs button.active{
  background: linear-gradient(135deg, var(--accent), #3fae66); color: #0c1a11; border-color: transparent;
}
nav.tabs button .emoji{ font-size:18px; }
nav.tabs button .badge-dot{
  position:absolute; top:2px; right:8px; background: var(--danger); color:#fff;
  font-size:10px; border-radius:10px; padding: 1px 6px; font-weight:700;
}
@media (max-width: 620px){
  nav.tabs{
    position: fixed; left:0; right:0; bottom:0; margin:0;
    background: var(--panel); border-top:1px solid var(--border);
    padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
    box-shadow: 0 -8px 24px rgba(0,0,0,0.4);
    z-index: 50; gap:4px;
  }
  nav.tabs button{ min-width:0; border-radius:10px; font-size:10.5px; padding:8px 4px; }
  .wrap{ padding-bottom: calc(var(--nav-h) + 40px); }
}

/* ---- Painéis / cards ---- */
.panel{
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow); margin-bottom: 16px; animation: fadeIn .25s ease;
}
@keyframes fadeIn{ from{opacity:0; transform: translateY(6px);} to{opacity:1; transform:none;} }
h2.section-title{ margin: 0 0 10px; font-size: 18px; display:flex; align-items:center; gap:8px;}
p.lead, div.lead{ color: var(--text-dim); font-size:14px; line-height:1.55; }
div.lead p{ margin: 0 0 10px; }
div.lead ul{ margin: 0; padding-left: 20px; }
div.lead ul li{ margin-bottom: 6px; }

.grid2{ display:grid; grid-template-columns: 1fr 1fr; gap:12px; }
@media (max-width: 600px){ .grid2{ grid-template-columns: 1fr; } }

.stat-card{ background: var(--panel-2); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
.stat-card .num{ font-size:22px; font-weight:800; color: var(--accent-2); }
.stat-card .label{ font-size:12px; color: var(--text-dim); }

.progressbar{ height: 10px; border-radius: 999px; background: rgba(255,255,255,0.06); overflow:hidden; border: 1px solid var(--border); margin-top:6px; }
.progressbar > div{ height:100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .4s ease; }

button.btn, a.btn{
  background: linear-gradient(135deg, var(--accent), #3fae66); color:#0c1a11; border:none;
  padding: 12px 18px; border-radius: 12px; font-weight:700; font-size:14px; cursor:pointer;
  box-shadow: 0 6px 16px rgba(111,207,125,0.25); transition: transform .1s ease;
  display:inline-block;
}
button.btn:active, a.btn:active{ transform: scale(0.97); }
button.btn.secondary, a.btn.secondary{ background: var(--panel-2); color: var(--text); border:1px solid var(--border); box-shadow:none; }
button.btn.ghost, a.btn.ghost{ background: transparent; color: var(--text-dim); border:1px dashed var(--border); box-shadow:none; }
button.btn:disabled{ opacity:.4; cursor:not-allowed; }

/* ---- Conceito / quiz ---- */
.concept-card{ background: var(--panel-2); border:1px solid var(--border); border-radius: 14px; padding: 18px; }
.concept-tag{
  display:inline-block; font-size:11px; text-transform:uppercase; letter-spacing:.04em;
  color: var(--accent-3); background: rgba(79,163,209,0.12);
  border:1px solid rgba(79,163,209,0.35); padding:3px 8px; border-radius:8px; margin-bottom:8px;
}
.concept-title{ font-size:17px; font-weight:800; margin:4px 0 10px; }
.concept-text{ font-size:14.5px; line-height:1.6; color: var(--text); }

.quiz-q{ margin-top:16px; padding-top:14px; border-top:1px dashed var(--border); }
.quiz-q .qtext{ font-size:14.5px; font-weight:600; margin-bottom:10px; }
.opt{
  display:block; width:100%; text-align:left; background: var(--panel); border:1px solid var(--border);
  color: var(--text); padding: 11px 12px; border-radius:10px; margin-bottom:8px; cursor:pointer;
  font-size:13.5px; transition: all .15s ease;
}
.opt:hover{ border-color: var(--accent); }
.opt.correct{ background: rgba(111,207,125,0.18); border-color: var(--ok); }
.opt.wrong{ background: rgba(226,104,95,0.18); border-color: var(--danger); }
.opt.disabled{ pointer-events:none; opacity:.85; }

.feedback{ margin-top:10px; font-size:13.5px; padding:10px 12px; border-radius:10px; }
.feedback.ok{ background: rgba(111,207,125,0.14); color: var(--ok); border:1px solid rgba(111,207,125,0.4); }
.feedback.bad{ background: rgba(226,104,95,0.14); color: var(--danger); border:1px solid rgba(226,104,95,0.4); }

.explain-textarea{
  width:100%; min-height:130px; resize:vertical; margin-top:8px;
  background: var(--panel); border:1px solid var(--border); color: var(--text);
  border-radius:10px; padding:12px; font-size:14px; font-family:inherit; line-height:1.5;
}
.explain-textarea:focus{ outline:none; border-color: var(--accent); }

/* ---- Login / cadastro / recuperação ---- */
.auth-input{
  width:100%; background: var(--panel); border:1px solid var(--border); color: var(--text);
  border-radius:10px; padding:11px 12px; font-size:14px; font-family:inherit;
}
.auth-input:focus{ outline:none; border-color: var(--accent); }
#auth-gate a{ color: var(--accent-3); text-decoration:none; }
#auth-gate a:hover{ text-decoration:underline; }

.track{ display:flex; gap:5px; margin-bottom:14px; flex-wrap:wrap; }
.track .dot{ width:14px; height:14px; border-radius:50%; background: var(--panel-2); border:2px solid var(--border); }
.track .dot.done{ background: var(--accent); border-color: var(--accent); }
.track .dot.current{ border-color: var(--accent-2); box-shadow: 0 0 0 3px rgba(244,185,66,0.2); }

/* ---- Flashcard ---- */
.flash-outer{ perspective: 1200px; margin-bottom:16px; }
.flashcard{ min-height: 220px; position:relative; width:100%; transform-style: preserve-3d; transition: transform .5s cubic-bezier(.4,.2,.2,1); cursor:pointer; }
.flashcard.flipped{ transform: rotateY(180deg); }
.face{ position:absolute; inset:0; backface-visibility:hidden; border-radius:16px; padding:22px; display:flex; flex-direction:column; justify-content:center; border:1px solid var(--border); }
.face.front{ background: linear-gradient(150deg, var(--panel-2), var(--panel)); }
.face.back{ background: linear-gradient(150deg, #203323, #1a2b20); transform: rotateY(180deg); }
.face .hint{ font-size:11px; color:var(--text-dim); position:absolute; bottom:12px; right:16px; }
.face .qtext{ font-size:16px; font-weight:700; line-height:1.5; }
.face .atext{ font-size:14.5px; line-height:1.6; }

.rate-row{ display:grid; grid-template-columns: repeat(4,1fr); gap:8px; }
.rate-btn{ padding:12px 6px; border-radius:12px; border:1px solid var(--border); cursor:pointer; font-weight:700; font-size:12.5px; text-align:center; color:#0c1a11; }
.rate-btn small{ display:block; font-weight:500; font-size:10px; margin-top:2px; opacity:.75; }
.rate-again{ background: #e2685f; }
.rate-hard{ background: #f0a34c; }
.rate-good{ background: #6fcf7d; }
.rate-easy{ background: #4fa3d1; color:#08222f; }

.empty-state{ text-align:center; padding: 30px 10px; color: var(--text-dim); }
.empty-state .big{ font-size:42px; margin-bottom:10px; }

.concept-row{
  display:flex; align-items:center; justify-content:space-between; gap:10px; padding: 10px 12px;
  border-radius:10px; background: var(--panel-2); border:1px solid var(--border); margin-bottom:8px; font-size:13px;
}
.status-chip{ font-size:11px; padding:3px 8px; border-radius:999px; font-weight:700; white-space:nowrap; }
.chip-new{ background:rgba(255,255,255,0.08); color: var(--text-dim); }
.chip-learning{ background:rgba(244,185,66,0.18); color: var(--accent-2); }
.chip-review{ background:rgba(79,163,209,0.18); color: var(--accent-3); }
.chip-mastered{ background:rgba(111,207,125,0.18); color: var(--ok); }

.badges-grid{ display:grid; grid-template-columns: repeat(auto-fill, minmax(120px,1fr)); gap:10px; }
.badge-item{ background: var(--panel-2); border:1px solid var(--border); border-radius:12px; padding:12px 8px; text-align:center; font-size:11.5px; }
.badge-item.locked{ opacity:.35; filter:grayscale(1); }
.badge-item .ic{ font-size:26px; margin-bottom:6px; }

.toast{
  position: fixed; top: 16px; left:50%; transform: translateX(-50%);
  background: var(--accent); color:#0c1a11; padding:10px 18px; border-radius:999px;
  font-weight:700; font-size:13px; box-shadow: var(--shadow); z-index:999;
  animation: toastIn .25s ease, toastOut .4s ease 2.2s forwards;
}
@keyframes toastIn{ from{opacity:0; transform:translate(-50%,-10px);} to{opacity:1; transform:translate(-50%,0);} }
@keyframes toastOut{ to{opacity:0; transform:translate(-50%,-10px);} }

footer.credit{ text-align:center; font-size:11.5px; color: var(--text-dim); margin-top:24px; line-height:1.6; }
.quiz-progress{ display:flex; justify-content:space-between; font-size:12px; color:var(--text-dim); margin-bottom:8px;}
.score-big{ font-size:44px; font-weight:800; color:var(--accent-2); text-align:center; }
.setup-banner{
  background: rgba(244,185,66,0.12); border:1px solid rgba(244,185,66,0.4); color: var(--accent-2);
  padding: 12px 14px; border-radius: 12px; font-size:12.5px; margin-bottom:16px; line-height:1.6;
}
.setup-banner code{ background: rgba(0,0,0,0.25); padding:1px 6px; border-radius:6px; }

/* ---- Catálogo (index.html) ---- */
.catalog-grid{ display:grid; grid-template-columns: repeat(auto-fill, minmax(260px,1fr)); gap:14px; }
.module-card{
  background: var(--panel-2); border:1px solid var(--border); border-radius:16px; padding:18px;
  display:flex; flex-direction:column; gap:10px; text-decoration:none; color:var(--text);
  transition: transform .15s ease, border-color .15s ease;
}
.module-card:hover{ transform: translateY(-3px); border-color: var(--accent); }
.module-card .ic{ font-size:30px; }
.module-card h3{ margin:0; font-size:15.5px; }
.module-card p{ margin:0; font-size:12.5px; color:var(--text-dim); line-height:1.5; }
.module-card .meta{ display:flex; justify-content:space-between; align-items:center; margin-top:auto; font-size:11px; color:var(--text-dim); }
.plan-chip{ font-size:10.5px; padding:3px 8px; border-radius:999px; font-weight:700; }
.plan-free{ background:rgba(111,207,125,0.18); color: var(--ok); }
.plan-premium{ background:rgba(244,185,66,0.18); color: var(--accent-2); }