:root{
  --primary:#E2136E;
  --primary-dark:#B80F5A;
  --primary-light:#FF8FBB;
  --bg:#F7F5F7;
  --card-bg:#FFFFFF;
  --text:#20222B;
  --text-muted:#8A8894;
  --border:#EFE4EB;
  --shadow-sm:0 1px 3px rgba(30,10,25,.06);
  --shadow-md:0 8px 24px rgba(226,19,110,.10), 0 2px 6px rgba(30,10,25,.05);
  --shadow-lg:0 14px 40px rgba(226,19,110,.16), 0 4px 10px rgba(30,10,25,.06);
  --green:#12A15A;
  --red:#E0403F;
  --orange:#EF9433;
  --gray:#E7E3E7;
}
[data-theme="dark"]{
  --bg:#0F0D10;
  --card-bg:#1B171A;
  --text:#F3EFF2;
  --text-muted:#9C97A0;
  --border:#2C262A;
  --shadow-sm:0 1px 3px rgba(0,0,0,.4);
  --shadow-md:0 8px 24px rgba(226,19,110,.18), 0 2px 8px rgba(0,0,0,.4);
  --shadow-lg:0 14px 40px rgba(226,19,110,.24), 0 4px 14px rgba(0,0,0,.5);
  --gray:#28242A;
}
*{box-sizing:border-box;margin:0;padding:0;font-family:'Segoe UI',-apple-system,'Helvetica Neue',Arial,sans-serif;}
body{background:var(--bg);color:var(--text);transition:background .3s,color .3s;overflow-x:hidden;}
.hidden{display:none!important;}

/* Loading */
.loading-screen{position:fixed;inset:0;background:linear-gradient(160deg,var(--primary),var(--primary-dark));display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:999;}
.loading-logo{color:#fff;font-size:23px;font-weight:700;letter-spacing:.2px;margin-bottom:20px;}
.loading-bar{width:180px;height:4px;background:rgba(255,255,255,.28);border-radius:10px;overflow:hidden;}
.loading-fill{width:0%;height:100%;background:#fff;border-radius:10px;animation:loadFill 1.6s ease forwards;}
@keyframes loadFill{to{width:100%;}}

/* Card — soft elevated premium feel */
.glass-card{
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:18px;
  box-shadow:var(--shadow-md);
  padding:26px;
  transition:box-shadow .25s,transform .25s,background .3s,border-color .3s;
}

/* Screens */
.screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;padding:20px;gap:16px;animation:fadeUp .5s ease;}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:translateY(0);}}

/* Welcome */
.welcome-card{max-width:400px;width:100%;text-align:center;margin-top:9vh;position:relative;padding:38px 30px;box-shadow:var(--shadow-lg);}
.logo-badge{
  width:64px;height:64px;border-radius:20px;
  background:linear-gradient(160deg,var(--primary),var(--primary-dark));color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:28px;font-weight:800;margin:0 auto 18px;
  box-shadow:0 8px 20px rgba(226,19,110,.32);
}
.title-glow{
  color:var(--primary);
  font-size:23px;font-weight:700;letter-spacing:-.3px;
}
.title-glow::after{
  content:"";display:block;width:38px;height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--primary),var(--primary-light));
  margin:10px auto 0;
}
.subtitle{color:var(--text-muted);margin-top:14px;margin-bottom:26px;font-size:13.5px;}
.input-group{text-align:left;margin-bottom:22px;}
.input-group label{font-size:12px;font-weight:700;color:var(--text-muted);display:block;margin-bottom:7px;text-transform:uppercase;letter-spacing:.5px;}
.input-group input{
  width:100%;padding:13px 15px;border-radius:12px;border:1.5px solid var(--border);
  background:var(--bg);color:var(--text);font-size:15px;outline:none;transition:border-color .2s,box-shadow .2s;
}
.input-group input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(226,19,110,.10);}
.error-msg{color:var(--red);font-size:12px;display:block;margin-top:5px;min-height:14px;}

.btn-primary,.btn-secondary,.btn-finish{
  border:none;border-radius:12px;padding:14px 20px;font-size:14.5px;font-weight:700;cursor:pointer;
  transition:transform .15s,box-shadow .2s,background .2s,opacity .15s;
}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;width:100%;box-shadow:0 6px 16px rgba(226,19,110,.28);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(226,19,110,.36);}
.btn-primary:active{transform:translateY(0) scale(.98);}
.btn-secondary{background:var(--card-bg);border:1.5px solid var(--border);color:var(--text);box-shadow:var(--shadow-sm);}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);}
.btn-finish{background:linear-gradient(135deg,var(--green),#0C8A49);color:#fff;box-shadow:0 6px 16px rgba(18,161,90,.3);}
.btn-finish:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(18,161,90,.38);}
.glow-pulse{}

/* Footer — refined signature */
.footer-brand{
  display:flex;flex-direction:column;align-items:center;gap:9px;
  margin-top:24px;padding-top:16px;
}
.footer-line{width:32px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--primary-light));}
.footer-text{
  font-size:11.5px;font-weight:500;color:var(--text-muted);letter-spacing:.2px;
}
.footer-text b{
  background:linear-gradient(90deg,var(--primary),var(--primary-dark));
  -webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800;
}
.fixed-footer{padding-bottom:24px;}

.theme-toggle{
  position:absolute;top:16px;right:16px;background:var(--card-bg);border:1px solid var(--border);
  border-radius:50%;width:38px;height:38px;cursor:pointer;font-size:16px;box-shadow:var(--shadow-sm);transition:.2s;
}
.theme-toggle:hover{transform:rotate(15deg);}
.theme-toggle.small{position:static;width:32px;height:32px;font-size:14px;margin-left:8px;}

/* Quiz Header */
.quiz-header{width:100%;max-width:800px;display:flex;justify-content:space-between;align-items:center;}
.header-left{font-weight:800;color:var(--primary);font-size:14.5px;}
.header-center{font-weight:600;font-size:14px;color:var(--text);}
.header-right{display:flex;align-items:center;}
.timer-glow{
  font-weight:800;color:var(--primary);font-size:16.5px;font-variant-numeric:tabular-nums;
  background:rgba(226,19,110,.08);padding:6px 12px;border-radius:8px;
}

/* Progress */
.progress-wrap{width:100%;max-width:800px;}
.progress-bar{width:100%;height:9px;background:var(--gray);border-radius:8px;overflow:hidden;}
.progress-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--primary),var(--primary-light));transition:width .35s ease;border-radius:8px;}
.progress-text{text-align:right;font-size:12px;margin-top:7px;color:var(--text-muted);}

/* Question Card */
.question-card{width:100%;max-width:800px;}
.q-number{color:var(--primary);font-weight:800;font-size:12.5px;margin-bottom:9px;letter-spacing:.5px;text-transform:uppercase;}
.q-text{font-size:17.5px;font-weight:600;margin-bottom:20px;line-height:1.55;}
.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
@media(max-width:600px){.options-grid{grid-template-columns:1fr;}}
.option-item{
  padding:15px 17px;border-radius:12px;border:1.5px solid var(--border);background:var(--bg);
  cursor:pointer;transition:border-color .15s,background .15s,color .15s,transform .15s,box-shadow .15s;font-size:14.5px;
}
.option-item:hover{border-color:var(--primary-light);transform:translateY(-1px);box-shadow:var(--shadow-sm);}
.option-item.selected{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border-color:transparent;box-shadow:0 6px 16px rgba(226,19,110,.3);}
.option-item.correct{background:linear-gradient(135deg,var(--green),#0C8A49);color:#fff;border-color:transparent;}
.option-item.wrong{background:linear-gradient(135deg,var(--red),#B92E2D);color:#fff;border-color:transparent;}
.option-item.skipped{background:linear-gradient(135deg,var(--orange),#D67C1F);color:#fff;border-color:transparent;}

/* Nav Buttons */
.nav-buttons{width:100%;max-width:800px;display:flex;flex-wrap:wrap;gap:10px;}
.nav-buttons button{flex:1;min-width:110px;}

/* Navigator */
.navigator{width:100%;max-width:800px;}
.navigator-title{font-weight:700;color:var(--text-muted);margin-bottom:12px;font-size:12px;text-transform:uppercase;letter-spacing:.5px;}
.navigator-grid{display:flex;flex-wrap:wrap;gap:9px;}
.nav-circle{
  width:35px;height:35px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;cursor:pointer;border:1.5px solid var(--border);background:var(--gray);
  color:var(--text-muted);transition:.18s;
}
.nav-circle:hover{transform:translateY(-2px);}
.nav-circle.visited{background:var(--card-bg);color:var(--text);box-shadow:var(--shadow-sm);}
.nav-circle.current{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border-color:transparent;box-shadow:0 4px 12px rgba(226,19,110,.35);}
.nav-circle.answered{background:linear-gradient(135deg,var(--green),#0C8A49);color:#fff;border-color:transparent;}

/* Modal */
.modal{position:fixed;inset:0;background:rgba(20,15,18,.5);backdrop-filter:blur(2px);display:flex;align-items:center;justify-content:center;z-index:500;}
.modal-content{max-width:340px;text-align:center;box-shadow:var(--shadow-lg);}
.modal-content h3{font-size:16.5px;font-weight:700;}
.modal-content p{color:var(--text-muted);font-size:13.5px;margin-top:8px;}
.modal-buttons{display:flex;gap:12px;margin-top:20px;}
.modal-buttons button{flex:1;}

/* Result */
.result-card{max-width:460px;width:100%;text-align:center;box-shadow:var(--shadow-lg);}
.circular-score-wrap{position:relative;width:170px;height:170px;margin:18px auto;}
.circular-score-text{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:27px;font-weight:800;color:var(--primary);}
.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;text-align:left;margin:18px 0;font-size:13px;}
.result-grid div{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:10px 12px;}
.result-grid b{color:var(--text-muted);font-weight:600;}
.performance-msg{font-weight:800;font-size:17.5px;color:var(--primary);margin:16px 0;}
.result-buttons{display:flex;flex-direction:column;gap:10px;margin-top:12px;}
#pieChart{margin:12px auto;display:block;}

/* Review */
.review-item{border:1px solid var(--border);border-radius:14px;padding:15px;margin-bottom:12px;text-align:left;box-shadow:var(--shadow-sm);}
.review-item .tag{font-size:10.5px;font-weight:800;padding:4px 10px;border-radius:6px;color:#fff;display:inline-block;margin-bottom:8px;letter-spacing:.4px;}
.tag.correct{background:linear-gradient(135deg,var(--green),#0C8A49);}
.tag.wrong{background:linear-gradient(135deg,var(--red),#B92E2D);}
.tag.skipped{background:linear-gradient(135deg,var(--orange),#D67C1F);}

/* Print */
@media print{
  body *{visibility:hidden;}
  #printArea,#printArea *{visibility:visible;}
  #printArea{position:absolute;top:0;left:0;width:100%;}
  .result-buttons{display:none!important;}
}