:root{
  /* Palette: Dark Gold */
  --bg:#0b1220;
  --surface:#0f1724;
  --card:#0e1620;
  --muted:#9aa6b2;
  --text:#e6eef8;
  --gold-500:#c59d5f;
  --gold-400:#d6b26b;
  --gold-300:#ead89b;
  --accent:#7dd3fc;
  --radius:14px;
  --glass: rgba(255,255,255,0.03);
}

*{box-sizing:border-box}
body{
  margin:0;
  background: linear-gradient(180deg,#04060a 0%, var(--bg) 60%);
  color:var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'DM Sans', 'Inter', sans-serif;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.45;
}

.container{
  max-width:1100px;
  margin:36px auto;
  padding:28px;
}

.calc-header{display:flex;flex-direction:column;gap:18px;margin-bottom:18px}
.header-top{display:flex;justify-content:space-between;align-items:center}
.header-top > div:last-child{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}
.header-brand{display:flex;gap:12px;align-items:center}
.logo-badge{width:56px;height:56px;border-radius:10px;background:linear-gradient(135deg,var(--gold-500),var(--gold-300));display:flex;flex-direction:column;align-items:center;justify-content:center;font-weight:700;color:#08101a}
.header-titles h1{margin:0;font-size:20px}
.header-titles p{margin:0;color:var(--muted);font-size:13px}

.playstore-btn{background:transparent;border:1px solid rgba(255,215,0,0.08);color:var(--gold-300);padding:8px 12px;border-radius:8px;text-decoration:none;cursor:pointer}
.playstore-btn:hover{background:rgba(214,178,107,0.06)}

.stats-dashboard{display:flex;gap:10px;flex-wrap:wrap}
.stat-pill{background:linear-gradient(180deg, rgba(255,255,255,0.02), transparent);padding:8px 12px;border-radius:999px;border:1px solid var(--glass);display:flex;flex-direction:column;align-items:center;min-width:84px}
.stat-label{font-size:11px;color:var(--muted)}
.stat-num{font-weight:700;font-size:16px;color:var(--text)}

.quiz-card{background:linear-gradient(180deg, rgba(255,255,255,0.015), rgba(0,0,0,0.06));border:1px solid var(--glass);padding:22px;border-radius:var(--radius);margin:18px auto;max-width:980px;width:calc(100% - 48px);box-shadow:0 8px 30px rgba(2,6,23,0.6)}
.card-meta{display:flex;gap:8px;align-items:center;margin-bottom:8px}
.badge-module{background:rgba(255,255,255,0.03);padding:6px 8px;border-radius:8px;font-size:12px;color:var(--muted)}
.badge-rpn{background:linear-gradient(90deg,var(--gold-500),var(--gold-300));padding:6px 8px;border-radius:8px;color:#08101a;font-weight:700;font-size:12px}

.quiz-statement{margin:8px 0 12px;color:var(--text)}
.quiz-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;align-items:center}
.quiz-option{appearance:none;border:1px solid rgba(255,255,255,0.04);background:linear-gradient(180deg, rgba(255,255,255,0.01), rgba(0,0,0,0.06));color:var(--text);padding:12px;border-radius:10px;cursor:pointer;transition:transform .12s ease, box-shadow .12s ease, background .12s ease}
.quiz-option:hover{transform:translateY(-4px);box-shadow:0 8px 20px rgba(0,0,0,0.6)}
.quiz-option:focus{outline:2px solid rgba(197,157,95,0.18);outline-offset:2px}
.quiz-option.correct{background:linear-gradient(90deg,#12381a,#1c5a2a);color:#dff6e8;border-color:rgba(34,197,94,0.12)}
.quiz-option.wrong{background:linear-gradient(90deg,#3b0b0b,#5a1010);color:#ffd7d7;border-color:rgba(220,38,38,0.12)}

.quiz-feedback{margin-top:10px;padding:10px;border-left:4px solid var(--gold-500);background:linear-gradient(90deg, rgba(197,157,95,0.04), transparent);color:var(--muted);border-radius:6px}

@media (max-width:720px){
  .container{padding:16px;margin:18px}
  .quiz-options{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:420px){
  .quiz-options{grid-template-columns:1fr}
  .header-top{flex-direction:column;align-items:flex-start;gap:10px}
  .header-top > div:last-child{justify-content:flex-start}
}

/* small helpers */
.muted{color:var(--muted)}

/* Hub / index styles: transforma a lista em cartões */
.container > ul{list-style:none;margin:22px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(360px,1fr));gap:24px}
.container > ul li{margin:0}
.card-link{display:block;padding:24px;border-radius:14px;background:linear-gradient(180deg,rgba(255,255,255,0.02),transparent);border:1px solid var(--glass);color:var(--gold-300);text-decoration:none;font-weight:700;box-shadow:0 8px 28px rgba(2,6,23,0.55);transition:transform .16s ease,box-shadow .16s ease,background .16s ease;min-height:120px}
.card-link:hover{transform:translateY(-8px);box-shadow:0 26px 60px rgba(2,6,23,0.75);background:linear-gradient(180deg, rgba(214,178,107,0.06), rgba(255,255,255,0.01))}
.card-link:active{transform:translateY(-3px)}
.card-title{font-size:16px;color:var(--text);margin:0 0 8px}
.module-desc{margin:0;font-size:14px;color:var(--muted);line-height:1.4}
.module-count{margin-top:14px;font-size:12px;color:var(--gold-400);font-weight:700}

/* solution button inside quiz cards */
.solution-btn{margin-left:8px;padding:8px 10px;border-radius:8px;border:1px solid rgba(214,178,107,0.12);background:transparent;color:var(--gold-300);cursor:pointer;font-weight:600}
.solution-btn:hover{background:rgba(214,178,107,0.04);transform:translateY(-2px)}

/* Modal for solution */
#jd-solution-modal{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;z-index:9998;pointer-events:none;opacity:0;transition:opacity .18s ease}
#jd-solution-modal.open{pointer-events:auto;opacity:1}
.jd-modal-overlay{position:absolute;inset:0;background:linear-gradient(180deg, rgba(2,6,23,0.6), rgba(2,6,23,0.8));backdrop-filter:blur(4px)}
.jd-modal-window{position:relative;z-index:2;max-width:880px;width:92%;background:linear-gradient(180deg, rgba(14,20,28,0.95), rgba(8,10,14,0.98));border:1px solid var(--glass);border-radius:14px;padding:20px;box-shadow:0 20px 60px rgba(2,6,23,0.8);color:var(--text)}
.jd-modal-close{position:absolute;right:12px;top:8px;border:0;background:transparent;color:var(--muted);font-size:22px;cursor:pointer}
.jd-modal-body{max-height:60vh;overflow:auto;padding-top:8px}
.jd-modal-body h4{margin:0 0 8px}
.solution-sequence pre{background:rgba(255,255,255,0.02);padding:10px;border-radius:8px;border:1px solid rgba(255,255,255,0.02);overflow:auto}
.jd-modal-body img{max-width:100%;height:auto;border-radius:8px;margin-top:8px}

/* visualização de teclas (kbd sequence) usada nas soluções */
.kbd-seq{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:10px}
.kbd{display:inline-flex;align-items:center;justify-content:center;padding:10px 14px;border-radius:10px;background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.06));border:1px solid rgba(255,255,255,0.03);color:var(--text);font-weight:700;box-shadow:0 6px 18px rgba(2,6,23,0.45)}
.kbd.small{padding:6px 8px;font-size:13px;border-radius:8px}
.kbd.arrow{background:transparent;border:0;box-shadow:none;color:var(--muted);font-weight:600;padding:0 6px}
.solution-sequence{margin-top:8px}
.container > h1{font-size:30px;margin:0 0 10px;color:var(--text);letter-spacing:0.2px}

.module-desc{margin:8px 0 0;font-size:13px;color:var(--muted);line-height:1.3}