/* =====================================================
   Pré-ENEM Digital MT — Equilíbrio Químico
   Bio+Tech EduDesign © 2026
   Paleta: Verde-esmeralda + Azul-oceano + Dourado + Roxo
   ===================================================== */

:root{
  --bg-0:#0a1f1a;
  --bg-1:#0e2a24;
  --bg-2:#12362e;
  --primary:#10b981;
  --primary-dark:#059669;
  --accent:#38bdf8;
  --accent-dark:#0284c7;
  --gold:#f59e0b;
  --gold-dark:#d97706;
  --purple:#a855f7;
  --danger:#ef4444;
  --text:#ecfdf5;
  --text-muted:#94d3bd;
  --border:rgba(16,185,129,.25);
  --card:rgba(255,255,255,.05);
  --card-hover:rgba(255,255,255,.09);
  --shadow:0 10px 40px rgba(0,0,0,.4);
  --radius:16px;
  --font:'Inter','Segoe UI',system-ui,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:var(--font);
  color:var(--text);
  background:
    radial-gradient(ellipse at top left, #064e3b 0%, transparent 55%),
    radial-gradient(ellipse at bottom right, #0c4a6e 0%, transparent 55%),
    linear-gradient(180deg,var(--bg-0),var(--bg-1) 60%, var(--bg-2));
  background-attachment:fixed;
  min-height:100vh;
  overflow-x:hidden;
  line-height:1.55;
}

/* ==================== HEADER ==================== */
.top-bar{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(14px);
  background:rgba(10,31,26,.75);
  border-bottom:1px solid var(--border);
  padding:.8rem 1.5rem;
  display:flex;align-items:center;gap:1rem;
  flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:.7rem;font-weight:700;font-size:1.05rem}
.brand img{width:36px;height:36px;border-radius:8px}
.brand small{display:block;font-weight:500;color:var(--text-muted);font-size:.75rem}
.hud{display:flex;align-items:center;gap:.9rem;margin-left:auto;flex-wrap:wrap}
.hud .chip{
  background:var(--card);border:1px solid var(--border);
  padding:.35rem .75rem;border-radius:99px;font-size:.85rem;
  display:flex;align-items:center;gap:.4rem;
}
.hud .avatar-mini{width:32px;height:32px;border-radius:50%;object-fit:cover;border:2px solid var(--primary)}
.progress-bar{height:8px;background:rgba(255,255,255,.08);border-radius:99px;overflow:hidden;flex:1;min-width:180px}
.progress-bar>div{height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .6s ease;width:0%}

/* ==================== SCREENS ==================== */
.screen{
  display:none;
  padding:2rem 1.2rem 4rem;
  max-width:1180px;
  margin:0 auto;
  animation:fade .5s ease;
}
.screen.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ==================== HERO ==================== */
.hero{
  display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:center;
  padding:2rem 1rem;
}
.hero-img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow)}
.hero h1{font-size:2.6rem;line-height:1.1;margin-bottom:.8rem}
.hero h1 span{background:linear-gradient(90deg,var(--primary),var(--accent),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--text-muted);font-size:1.05rem;margin-bottom:1.5rem}
.hero .tags{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.5rem}
.hero .tags span{background:var(--card);border:1px solid var(--border);padding:.3rem .7rem;border-radius:99px;font-size:.8rem;color:var(--text-muted)}
@media(max-width:820px){.hero{grid-template-columns:1fr}.hero h1{font-size:2rem}}

/* ==================== BUTTONS ==================== */
.btn{
  cursor:pointer;border:0;font-family:inherit;font-weight:600;
  padding:.85rem 1.6rem;border-radius:99px;font-size:.95rem;
  display:inline-flex;align-items:center;gap:.5rem;
  transition:all .2s ease;text-decoration:none;color:inherit;
}
.btn-primary{background:linear-gradient(90deg,var(--primary),var(--accent));color:#001e17;box-shadow:0 8px 25px rgba(16,185,129,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(16,185,129,.5)}
.btn-ghost{background:var(--card);border:1px solid var(--border);color:var(--text)}
.btn-ghost:hover{background:var(--card-hover)}
.btn-gold{background:linear-gradient(90deg,var(--gold),#fbbf24);color:#3a1c00}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}

/* ==================== MENTOR CARDS ==================== */
.section-title{text-align:center;margin-bottom:2rem}
.section-title h2{font-size:1.9rem;margin-bottom:.4rem;background:linear-gradient(90deg,var(--primary),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.section-title p{color:var(--text-muted)}

.mentor-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.2rem;margin-bottom:2rem}
.mentor-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:1.4rem 1rem;text-align:center;
  cursor:pointer;transition:all .25s ease;
  position:relative;overflow:hidden;
}
.mentor-card::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,transparent 40%, rgba(16,185,129,.08) 100%);
  opacity:0;transition:opacity .3s ease;
}
.mentor-card:hover{transform:translateY(-6px);border-color:var(--primary);box-shadow:0 15px 40px rgba(16,185,129,.25)}
.mentor-card:hover::before{opacity:1}
.mentor-card.selected{border-color:var(--gold);box-shadow:0 0 0 3px rgba(245,158,11,.25)}
.mentor-card img{width:120px;height:120px;border-radius:50%;object-fit:cover;border:3px solid var(--primary);margin-bottom:.9rem}
.mentor-card h3{font-size:1.05rem;margin-bottom:.25rem}
.mentor-card .role{font-size:.8rem;color:var(--gold);text-transform:uppercase;letter-spacing:1px;margin-bottom:.6rem}
.mentor-card .bio{font-size:.85rem;color:var(--text-muted);line-height:1.4}

.form-inline{display:flex;gap:.8rem;flex-wrap:wrap;justify-content:center;margin-top:1.5rem}
.form-inline input{
  background:var(--card);border:1px solid var(--border);color:var(--text);
  padding:.85rem 1.2rem;border-radius:99px;font-size:.95rem;font-family:inherit;
  min-width:260px;
}
.form-inline input:focus{outline:2px solid var(--primary);border-color:var(--primary)}

/* ==================== TRILHA (MAP) ==================== */
.trail{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.3rem;margin-top:1.5rem}
.mission-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:1.5rem;
  position:relative;overflow:hidden;
  transition:all .25s ease;
}
.mission-card.locked{opacity:.55;filter:grayscale(.4)}
.mission-card.completed{border-color:var(--gold)}
.mission-card::after{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
}
.mission-card.completed::after{background:linear-gradient(90deg,var(--gold),#fbbf24)}
.mission-card .badge-img{width:90px;height:90px;object-fit:contain;margin:0 auto .8rem;display:block;filter:drop-shadow(0 6px 12px rgba(0,0,0,.35))}
.mission-card h3{font-size:1.1rem;margin-bottom:.4rem;text-align:center}
.mission-card .region{font-size:.75rem;color:var(--accent);text-transform:uppercase;letter-spacing:1px;text-align:center;margin-bottom:.7rem}
.mission-card .desc{font-size:.85rem;color:var(--text-muted);text-align:center;margin-bottom:1rem;min-height:60px}
.mission-card .meta{display:flex;justify-content:space-between;font-size:.75rem;color:var(--text-muted);margin-bottom:.8rem}
.mission-card .status{position:absolute;top:.8rem;right:.8rem;font-size:1.4rem}

/* ==================== MISSION SCREEN ==================== */
.mission-header{
  display:flex;align-items:center;gap:1rem;
  padding:1.2rem;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);margin-bottom:1.5rem;
}
.mission-header img{width:70px;height:70px;object-fit:contain}
.mission-header h2{font-size:1.4rem;margin-bottom:.2rem}
.mission-header .subtitle{font-size:.85rem;color:var(--text-muted)}
.q-indicator{margin-left:auto;background:var(--gold);color:#3a1c00;padding:.4rem .9rem;border-radius:99px;font-weight:700;font-size:.85rem}

/* Mentor Dialog Box */
.mentor-box{
  display:flex;gap:1rem;background:linear-gradient(135deg,rgba(16,185,129,.12),rgba(56,189,248,.08));
  border:1px solid var(--border);border-radius:var(--radius);
  padding:1rem 1.2rem;margin-bottom:1.5rem;align-items:center;
}
.mentor-box img{width:56px;height:56px;border-radius:50%;object-fit:cover;border:2px solid var(--primary);flex-shrink:0}
.mentor-box p{font-size:.95rem;line-height:1.5}
.mentor-box p strong{color:var(--primary)}

/* Content Card */
.content-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.5rem;margin-bottom:1.5rem;
}
.content-card h3{color:var(--gold);margin-bottom:.8rem;font-size:1.1rem}
.content-card p{margin-bottom:.7rem;color:var(--text)}
.content-card ul{padding-left:1.4rem;margin-bottom:.7rem;color:var(--text-muted)}
.content-card li{margin-bottom:.35rem}
.content-card .formula{
  background:rgba(0,0,0,.35);border-left:4px solid var(--primary);
  padding:.9rem 1.2rem;border-radius:6px;font-family:'Courier New',monospace;
  color:#a7f3d0;margin:.8rem 0;overflow-x:auto;
}
.content-card .highlight{background:rgba(245,158,11,.15);padding:2px 6px;border-radius:4px;color:var(--gold);font-weight:600}

/* Question Card */
.question-card{
  background:linear-gradient(135deg,rgba(168,85,247,.08),rgba(56,189,248,.05));
  border:1px solid var(--purple);border-radius:var(--radius);
  padding:1.5rem;margin-bottom:1.2rem;
}
.question-card .q-tag{
  display:inline-block;background:var(--purple);color:#fff;
  padding:.25rem .7rem;border-radius:99px;font-size:.75rem;
  font-weight:700;margin-bottom:.8rem;letter-spacing:.5px;
}
.question-card .q-enunciado{font-size:.98rem;line-height:1.6;margin-bottom:1.2rem}
.question-card .q-enunciado strong{color:var(--accent)}

.options{display:flex;flex-direction:column;gap:.6rem}
.option{
  background:var(--card);border:2px solid var(--border);
  border-radius:12px;padding:.9rem 1.1rem;cursor:pointer;
  transition:all .2s ease;display:flex;gap:.8rem;align-items:flex-start;
  font-size:.92rem;line-height:1.45;
}
.option:hover:not(.disabled){border-color:var(--primary);background:var(--card-hover)}
.option .letter{
  min-width:32px;height:32px;background:var(--bg-2);border:1px solid var(--border);
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-weight:700;color:var(--text-muted);flex-shrink:0;font-size:.85rem;
}
.option.selected{border-color:var(--accent)}
.option.correct{border-color:var(--primary);background:rgba(16,185,129,.15)}
.option.correct .letter{background:var(--primary);color:#001e17;border-color:var(--primary)}
.option.wrong{border-color:var(--danger);background:rgba(239,68,68,.12)}
.option.wrong .letter{background:var(--danger);color:#fff;border-color:var(--danger)}
.option.disabled{cursor:not-allowed;opacity:.75}

/* Feedback Box */
.feedback{
  margin-top:1.2rem;padding:1.1rem 1.3rem;border-radius:12px;
  border-left:4px solid var(--primary);background:rgba(16,185,129,.08);
  animation:fade .4s ease;
}
.feedback.wrong{border-left-color:var(--danger);background:rgba(239,68,68,.08)}
.feedback h4{margin-bottom:.5rem;color:var(--primary);font-size:1rem}
.feedback.wrong h4{color:var(--danger)}
.feedback p{font-size:.9rem;line-height:1.55;color:var(--text)}
.feedback p + p{margin-top:.5rem}
.feedback .resolucao{background:rgba(0,0,0,.2);border-radius:8px;padding:.7rem .9rem;margin-top:.7rem;font-size:.88rem;color:var(--text-muted)}
.feedback .resolucao strong{color:var(--gold)}

/* Navigation footer */
.nav-footer{display:flex;justify-content:space-between;gap:1rem;margin-top:2rem;flex-wrap:wrap}

/* ==================== BADGES GALLERY ==================== */
.badges-gallery{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center;margin-top:1.5rem}
.badge-item{
  width:110px;text-align:center;position:relative;
  transition:all .3s ease;
}
.badge-item img{width:80px;height:80px;object-fit:contain;filter:grayscale(1) brightness(.4);transition:all .3s ease}
.badge-item.earned img{filter:none;animation:pulse-badge 2.5s ease-in-out infinite}
.badge-item .name{font-size:.75rem;color:var(--text-muted);margin-top:.4rem;line-height:1.2}
.badge-item.earned .name{color:var(--gold);font-weight:600}
@keyframes pulse-badge{0%,100%{transform:scale(1)}50%{transform:scale(1.06);filter:drop-shadow(0 0 12px rgba(245,158,11,.6))}}

/* ==================== FINAL / CERTIFICATE ==================== */
.certificate{
  background:linear-gradient(135deg,rgba(245,158,11,.1),rgba(16,185,129,.08));
  border:2px solid var(--gold);border-radius:var(--radius);
  padding:2.5rem 2rem;text-align:center;margin-top:1rem;
}
.certificate h2{font-size:2rem;background:linear-gradient(90deg,var(--gold),var(--primary));-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:.5rem}
.certificate .rank{font-size:3rem;font-weight:800;color:var(--gold);margin:1rem 0}
.certificate .stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:1rem;margin:1.5rem 0}
.certificate .stat{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1rem}
.certificate .stat .num{font-size:1.8rem;font-weight:800;color:var(--primary)}
.certificate .stat .lbl{font-size:.8rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px}

/* ==================== TOAST ==================== */
.toast-container{position:fixed;top:80px;right:20px;z-index:200;display:flex;flex-direction:column;gap:.6rem}
.toast{
  background:var(--bg-2);border:1px solid var(--primary);color:var(--text);
  padding:.8rem 1.1rem;border-radius:10px;font-size:.9rem;
  box-shadow:var(--shadow);animation:slideIn .3s ease;
  display:flex;align-items:center;gap:.5rem;max-width:320px;
}
.toast.error{border-color:var(--danger)}
.toast.gold{border-color:var(--gold);background:linear-gradient(135deg,var(--bg-2),rgba(245,158,11,.15))}
@keyframes slideIn{from{transform:translateX(400px);opacity:0}to{transform:none;opacity:1}}

/* ==================== CONFETTI ==================== */
.confetti{position:fixed;top:-20px;width:10px;height:14px;z-index:150;pointer-events:none;animation:fall 3s linear forwards}
@keyframes fall{to{transform:translateY(110vh) rotate(720deg);opacity:0}}

/* ==================== FOOTER ==================== */
.site-footer{
  padding:2rem 1rem 3rem;text-align:center;border-top:1px solid var(--border);
  margin-top:3rem;color:var(--text-muted);font-size:.85rem;
}
.site-footer .logos{display:flex;justify-content:center;align-items:center;gap:1.5rem;margin-bottom:1rem;flex-wrap:wrap}
.site-footer .logos img{height:50px;object-fit:contain;opacity:.9;background:rgba(255,255,255,.9);padding:6px 10px;border-radius:8px}
.site-footer a{color:var(--accent);text-decoration:none}
.site-footer a:hover{text-decoration:underline}

/* ==================== VIDEO EMBED ==================== */
.video-wrap{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:var(--radius);margin:1rem 0}
.video-wrap iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0}

/* ==================== INTERACTIVE LE CHATELIER ==================== */
.simulator{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.4rem;margin:1rem 0}
.simulator h4{color:var(--gold);margin-bottom:.8rem}
.sim-controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:.8rem;margin-bottom:1rem}
.sim-controls button{background:var(--card);border:1px solid var(--border);color:var(--text);padding:.7rem;border-radius:10px;cursor:pointer;transition:all .2s;font-family:inherit}
.sim-controls button:hover{border-color:var(--primary);background:var(--card-hover)}
.sim-result{background:rgba(0,0,0,.3);padding:.9rem 1.1rem;border-radius:10px;border-left:4px solid var(--accent);min-height:60px}
.sim-result strong{color:var(--accent)}

/* ==================== RESPONSIVE ==================== */
@media(max-width:640px){
  .top-bar{padding:.7rem 1rem;gap:.6rem}
  .hud .chip{font-size:.75rem;padding:.3rem .6rem}
  .brand{font-size:.9rem}
  .brand img{width:30px;height:30px}
  .hero h1{font-size:1.7rem}
  .screen{padding:1.2rem .8rem 3rem}
  .mission-header{flex-direction:column;text-align:center}
  .q-indicator{margin-left:0}
  .certificate .rank{font-size:2.2rem}
}