/* =====================================================
   NextCA Quiz Portal — Design Tokens
   ===================================================== */
:root{
  --color-primary:#0F2D62;
  --color-primary-light:#1C3F7F;
  --color-accent:#11C5C6;
  --color-bg:#FFFFFF;
  --color-bg-light:#F5F7FA;
  --color-border:#E2E6ED;
  --color-text:#1B2430;
  --color-text-muted:#5B6472;
  --color-success:#1D8A4B;
  --color-success-bg:#E7F6ED;
  --color-danger:#C6402C;
  --color-danger-bg:#FBEAE7;
  --color-warning:#B8860B;
  --color-warning-bg:#FFF6E0;

  --font-heading:'Poppins', Arial, sans-serif;
  --font-body:'Inter', Arial, sans-serif;

  --radius-sm:6px;
  --radius-md:10px;
  --radius-lg:14px;

  --shadow-sm:0 1px 2px rgba(15,45,98,0.06);
  --shadow-md:0 4px 16px rgba(15,45,98,0.08);

  --header-height:60px;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:var(--font-body);
  color:var(--color-text);
  background:var(--color-bg-light);
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
h1,h2,h3{font-family:var(--font-heading);margin:0;}
p{margin:0;}
button{font-family:var(--font-body);cursor:pointer;}
ul{margin:0;padding:0;}

.hidden{display:none !important;}

:focus-visible{
  outline:2px solid var(--color-accent);
  outline-offset:2px;
}

/* =====================================================
   Buttons
   ===================================================== */
.btn{
  font-family:var(--font-body);
  font-weight:600;
  font-size:14.5px;
  padding:11px 20px;
  border-radius:var(--radius-sm);
  border:1px solid transparent;
  transition:background-color .15s ease, border-color .15s ease, color .15s ease;
}
.btn-primary{background:var(--color-primary);color:#fff;}
.btn-primary:hover{background:var(--color-primary-light);}
.btn-primary:disabled{background:#9AA6B8;cursor:not-allowed;}

.btn-secondary{background:#fff;color:var(--color-primary);border-color:var(--color-primary);}
.btn-secondary:hover{background:var(--color-bg-light);}

.btn-outline{background:#fff;color:var(--color-accent);border-color:var(--color-accent);}
.btn-outline:hover{background:#EAFBFB;}

.btn-ghost{background:transparent;color:var(--color-text-muted);}
.btn-ghost:hover{color:var(--color-text);}

.btn-submit{background:var(--color-danger);color:#fff;}
.btn-submit:hover{background:#A9331F;}

.btn-large{width:100%;padding:14px 20px;font-size:16px;}
.btn-block{width:100%;}

.btn-icon{
  background:transparent;border:none;padding:8px;border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;color:var(--color-primary);
}
.btn-icon svg{width:22px;height:22px;fill:currentColor;}
.btn-icon:hover{background:rgba(15,45,98,0.06);}

/* =====================================================
   Brand
   ===================================================== */
.brand-mark{
  font-family:var(--font-heading);
  font-weight:700;
  font-size:22px;
  color:var(--color-primary);
  letter-spacing:.2px;
}
.brand-mark.small{font-size:17px;}
.brand-accent{color:var(--color-accent);}

/* =====================================================
   Screen 1 — Start
   ===================================================== */
#start-screen{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:32px 16px;
}
.start-card{
  width:100%;
  max-width:600px;
  background:#fff;
  border:1px solid var(--color-border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);
  padding:36px 32px 32px;
  text-align:center;
}
.brand{margin-bottom:18px;}
.start-tag{font-size:12.5px;font-weight:600;color:var(--color-accent);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px;}
.start-title{font-size:26px;color:var(--color-primary);}
.start-sub{color:var(--color-text-muted);margin-top:6px;font-size:15px;}

.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:10px;
  margin:26px 0 8px;
}
.stat{
  background:var(--color-bg-light);
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  padding:12px 6px;
}
.stat-value{display:block;font-family:var(--font-heading);font-weight:600;font-size:19px;color:var(--color-primary);}
.stat-positive .stat-value{color:var(--color-success);}
.stat-negative .stat-value{color:var(--color-danger);}
.stat-label{display:block;font-size:11.5px;color:var(--color-text-muted);margin-top:2px;text-transform:uppercase;letter-spacing:.4px;}

.instructions{
  text-align:left;
  background:var(--color-bg-light);
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  padding:18px 20px;
  margin:22px 0 26px;
}
.instructions h2{font-size:15px;color:var(--color-primary);margin-bottom:10px;}
.instructions-list{list-style:none;}
.instructions-list li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  color:var(--color-text);
  margin-bottom:9px;
}
.instructions-list li:last-child{margin-bottom:0;}
.instructions-list li::before{
  content:"";
  position:absolute;left:0;top:8px;
  width:6px;height:6px;border-radius:50%;
  background:var(--color-accent);
}

.resume-banner{
  background:var(--color-warning-bg);
  border:1px solid #E9CD86;
  border-radius:var(--radius-md);
  padding:14px 16px;
  margin-bottom:18px;
  text-align:left;
}
.resume-banner p{font-size:13.5px;color:#7A5B00;margin-bottom:10px;}
.resume-actions{display:flex;gap:10px;}
.resume-actions .btn{flex:1;padding:9px 14px;font-size:13.5px;}

.start-footnote{margin-top:12px;font-size:12.5px;color:var(--color-text-muted);}

/* =====================================================
   Screen 2 — Quiz
   ===================================================== */
#quiz-screen{min-height:100vh;display:flex;flex-direction:column;}

.quiz-header{
  position:sticky;top:0;z-index:20;
  height:var(--header-height);
  background:var(--color-primary);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 18px;
  box-shadow:var(--shadow-sm);
}
.quiz-header .brand-mark.small{color:#fff;}
.quiz-header .brand-accent{color:var(--color-accent);}
.quiz-header-left{display:flex;align-items:center;gap:10px;overflow:hidden;}
.quiz-name{
  font-size:13.5px;color:#CBD6EA;
  border-left:1px solid rgba(255,255,255,.25);
  padding-left:10px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.quiz-header-right{display:flex;align-items:center;gap:6px;}

.timer{
  display:flex;align-items:center;gap:7px;
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.22);
  border-radius:var(--radius-sm);
  padding:7px 12px;
  font-variant-numeric:tabular-nums;
}
.timer-icon{width:16px;height:16px;fill:var(--color-accent);}
#timer-text{font-weight:600;font-size:15px;letter-spacing:.3px;}
.timer.timer-low{background:rgba(198,64,44,.9);border-color:#C6402C;}
.timer.timer-low #timer-text{color:#fff;}

.palette-toggle{display:none;color:#fff;}
.palette-toggle:hover{background:rgba(255,255,255,.12);}

.timer-warning{
  background:var(--color-warning-bg);
  color:#7A5B00;
  text-align:center;
  font-size:13.5px;
  font-weight:600;
  padding:8px 12px;
}

.quiz-body{
  flex:1;
  display:grid;
  grid-template-columns:1fr 300px;
  gap:0;
  align-items:start;
  max-width:1180px;
  width:100%;
  margin:0 auto;
  position:relative;
}

/* Question panel */
.question-panel{
  padding:22px 24px 90px;
  min-width:0;
}
.question-meta{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:12px;
}
.q-progress{font-weight:600;font-size:14px;color:var(--color-primary);}
.q-subject{
  font-size:12px;color:var(--color-text-muted);
  background:var(--color-bg-light);
  border:1px solid var(--color-border);
  padding:3px 10px;border-radius:20px;
}

.question-card{
  background:#fff;
  border:1px solid var(--color-border);
  border-radius:var(--radius-lg);
  padding:22px 22px 8px;
  box-shadow:var(--shadow-sm);
}
.question-text{
  font-size:16.5px;
  line-height:1.6;
  color:var(--color-text);
  margin-bottom:20px;
  white-space:pre-wrap;
}

.options-list{display:flex;flex-direction:column;gap:10px;margin-bottom:8px;}
.option{
  display:flex;
  align-items:flex-start;
  gap:12px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  padding:13px 14px;
  background:#fff;
  transition:border-color .12s ease, background-color .12s ease;
}
.option:hover{border-color:var(--color-accent);}
.option-key{
  flex:0 0 26px;height:26px;border-radius:50%;
  border:1.5px solid var(--color-border);
  display:flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:700;color:var(--color-text-muted);
  background:var(--color-bg-light);
}
.option-text{font-size:14.5px;padding-top:3px;}
.option.selected{
  border-color:var(--color-primary);
  background:#EEF3FB;
}
.option.selected .option-key{
  background:var(--color-primary);
  border-color:var(--color-primary);
  color:#fff;
}

.question-actions{
  display:flex;
  gap:12px;
  margin-top:18px;
  flex-wrap:wrap;
}

.question-nav-buttons{
  display:flex;
  gap:12px;
  margin-top:22px;
  padding-top:18px;
  border-top:1px solid var(--color-border);
}
.question-nav-buttons #btn-submit{margin-left:auto;}

/* Palette panel */
.palette-panel{
  background:#fff;
  border-left:1px solid var(--color-border);
  padding:20px 18px;
  position:sticky;
  top:var(--header-height);
  height:calc(100vh - var(--header-height));
  overflow-y:auto;
}
.palette-panel-header{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:14px;
}
.palette-panel-header h2{font-size:15px;color:var(--color-primary);}
#btn-palette-close{display:none;}

.palette-legend{display:flex;flex-direction:column;gap:7px;margin-bottom:16px;}
.legend-item{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--color-text-muted);}
.dot{width:11px;height:11px;border-radius:50%;flex:0 0 auto;border:1.5px solid transparent;}
.dot-not-visited{background:#fff;border-color:#B7C0CE;}
.dot-unanswered{background:var(--color-danger);}
.dot-answered{background:var(--color-success);}
.dot-review{background:#7B4EBF;}
.dot-review-answered{background:#7B4EBF;box-shadow:inset 0 0 0 2px var(--color-success);}

.palette-grid{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:7px;
  margin-bottom:18px;
}
.palette-cell{
  aspect-ratio:1;
  border-radius:6px;
  border:1.5px solid #B7C0CE;
  background:#fff;
  font-size:12px;
  font-weight:600;
  color:var(--color-text);
  display:flex;align-items:center;justify-content:center;
}
.palette-cell.current{outline:2px solid var(--color-primary);outline-offset:1px;}
.palette-cell.unanswered{background:var(--color-danger);border-color:var(--color-danger);color:#fff;}
.palette-cell.answered{background:var(--color-success);border-color:var(--color-success);color:#fff;}
.palette-cell.review{background:#7B4EBF;border-color:#7B4EBF;color:#fff;}
.palette-cell.review-answered{background:#7B4EBF;border-color:var(--color-success);color:#fff;box-shadow:inset 0 0 0 2px var(--color-success);}

.palette-summary{
  background:var(--color-bg-light);
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  padding:12px 14px;
  margin-bottom:16px;
}
.summary-row{display:flex;justify-content:space-between;font-size:13px;padding:4px 0;color:var(--color-text-muted);}
.summary-row strong{color:var(--color-text);}

.palette-overlay{
  display:none;
}

/* =====================================================
   Modal
   ===================================================== */
.modal-backdrop{
  position:fixed;inset:0;
  background:rgba(15,20,30,.55);
  display:flex;align-items:center;justify-content:center;
  z-index:100;
  padding:16px;
}
.modal{
  background:#fff;
  border-radius:var(--radius-lg);
  padding:26px 26px 22px;
  width:100%;max-width:400px;
  box-shadow:var(--shadow-md);
}
.modal h2{font-size:19px;color:var(--color-primary);margin-bottom:10px;}
.modal-warning{
  background:var(--color-warning-bg);color:#7A5B00;
  font-size:13px;font-weight:600;
  padding:8px 12px;border-radius:var(--radius-sm);
  margin-bottom:14px;
}
.modal-stats{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:8px;margin-bottom:14px;
}
.modal-stat{
  text-align:center;background:var(--color-bg-light);
  border:1px solid var(--color-border);border-radius:var(--radius-sm);
  padding:10px 4px;
}
.modal-stat span{display:block;font-family:var(--font-heading);font-weight:600;font-size:18px;color:var(--color-primary);}
.modal-stat label{font-size:10.5px;color:var(--color-text-muted);text-transform:uppercase;}
.modal-note{font-size:12.5px;color:var(--color-text-muted);margin-bottom:18px;}
.modal-actions{display:flex;gap:10px;}
.modal-actions .btn{flex:1;}

/* =====================================================
   Screen 3 — Result
   ===================================================== */
#result-screen{min-height:100vh;padding:36px 16px;}
.result-wrap{max-width:640px;margin:0 auto;}
.result-header{text-align:center;margin-bottom:26px;}
.result-header h1{font-size:22px;color:var(--color-primary);margin-top:10px;}
.result-tag{font-size:12.5px;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.4px;margin-top:8px;}
.result-message{color:var(--color-text-muted);margin-top:6px;font-size:14px;}

.status-badge{
  display:inline-block;margin-top:12px;padding:6px 18px;border-radius:20px;
  font-family:var(--font-heading);font-weight:700;font-size:13.5px;letter-spacing:.4px;text-transform:uppercase;
}
.status-badge.status-pass{background:var(--color-success-bg);color:var(--color-success);}
.status-badge.status-partial{background:var(--color-warning-bg);color:var(--color-warning);}
.status-badge.status-fail{background:var(--color-danger-bg);color:var(--color-danger);}

.score-hero{
  background:#fff;border:1px solid var(--color-border);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);
  padding:26px;display:flex;align-items:center;justify-content:center;gap:36px;
  margin-bottom:20px;flex-wrap:wrap;
}
.score-circle{position:relative;width:140px;height:140px;}
.score-ring{width:100%;height:100%;transform:rotate(-90deg);}
.ring-track{fill:none;stroke:var(--color-bg-light);stroke-width:10;}
.ring-progress{
  fill:none;stroke:var(--color-accent);stroke-width:10;stroke-linecap:round;
  stroke-dasharray:326.7; /* 2*pi*52 */
  stroke-dashoffset:326.7;
  transition:stroke-dashoffset .8s ease;
}
.score-circle-inner{
  position:absolute;inset:0;display:flex;flex-direction:column;
  align-items:center;justify-content:center;
}
.score-number{font-family:var(--font-heading);font-weight:700;font-size:32px;color:var(--color-primary);}
.score-max{font-size:12.5px;color:var(--color-text-muted);}
.score-side{display:flex;flex-direction:column;align-items:center;}
.score-percentage{font-family:var(--font-heading);font-weight:700;font-size:30px;color:var(--color-accent);}
.score-percentage-label{font-size:12px;color:var(--color-text-muted);text-transform:uppercase;}

.result-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:16px;
}
.result-tile{
  background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-md);
  padding:14px 6px;text-align:center;
}
.tile-value{display:block;font-family:var(--font-heading);font-weight:600;font-size:19px;}
.tile-label{display:block;font-size:11px;color:var(--color-text-muted);margin-top:3px;text-transform:uppercase;letter-spacing:.3px;}
.result-tile.correct .tile-value{color:var(--color-success);}
.result-tile.wrong .tile-value{color:var(--color-danger);}
.result-tile.unanswered .tile-value{color:var(--color-text-muted);}
.result-tile.time .tile-value{color:var(--color-primary);font-size:15px;}

.marks-breakdown{
  background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-md);
  padding:14px 18px;margin-bottom:26px;
}
.marks-row{display:flex;justify-content:space-between;padding:7px 0;font-size:14px;color:var(--color-text-muted);}
.marks-row strong{color:var(--color-success);}
.marks-row.negative strong{color:var(--color-danger);}
.marks-row.total{border-top:1px solid var(--color-border);margin-top:4px;padding-top:12px;}
.marks-row.total span{color:var(--color-primary);font-weight:600;}
.marks-row.total strong{color:var(--color-primary);font-size:17px;}

.subject-breakdown{
  background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-md);
  padding:14px 18px;margin-bottom:26px;
}
.subject-breakdown-title{font-size:14px;color:var(--color-primary);margin-bottom:10px;}
.subject-breakdown-list{display:flex;flex-direction:column;gap:10px;}
.subject-row{display:flex;align-items:center;gap:10px;}
.subject-row-name{flex:0 0 150px;font-size:13px;color:var(--color-text);}
.subject-row-bar{flex:1;height:8px;border-radius:6px;background:var(--color-bg-light);overflow:hidden;}
.subject-row-bar-fill{height:100%;border-radius:6px;background:var(--color-accent);}
.subject-row-bar-fill.below-min{background:var(--color-danger);}
.subject-row-value{flex:0 0 auto;font-size:12.5px;font-weight:600;color:var(--color-text-muted);white-space:nowrap;}
.subject-row-value.below-min{color:var(--color-danger);}
.qualifying-note{font-size:12px;color:var(--color-text-muted);margin-top:12px;text-align:center;}

.result-actions{display:flex;flex-direction:column;gap:10px;}
.result-actions .btn{max-width:320px;margin:0 auto;width:100%;display:block;}

/* =====================================================
   Screen 4 — Review
   ===================================================== */
#review-screen{min-height:100vh;padding-bottom:40px;}
.review-wrap{max-width:720px;margin:0 auto;padding:0 16px;}
.review-header{
  display:flex;align-items:center;gap:8px;
  padding:18px 0;position:sticky;top:0;background:var(--color-bg-light);z-index:5;
}
.review-header h1{font-size:19px;color:var(--color-primary);}

.review-filter{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap;}
.filter-btn{
  background:#fff;border:1px solid var(--color-border);color:var(--color-text-muted);
  font-size:13px;font-weight:600;padding:7px 14px;border-radius:20px;
}
.filter-btn.active{background:var(--color-primary);border-color:var(--color-primary);color:#fff;}

.review-list{display:flex;flex-direction:column;gap:12px;}
.review-item{
  background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-md);
  padding:16px 18px;
}
.review-item-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;}
.review-item-head .rq-num{font-weight:600;font-size:13.5px;color:var(--color-primary);}
.result-chip{font-size:11px;font-weight:700;padding:3px 10px;border-radius:20px;text-transform:uppercase;}
.result-chip.correct{background:var(--color-success-bg);color:var(--color-success);}
.result-chip.wrong{background:var(--color-danger-bg);color:var(--color-danger);}
.result-chip.unanswered{background:var(--color-bg-light);color:var(--color-text-muted);}
.review-item-question{font-size:14.5px;margin-bottom:10px;line-height:1.55;}
.review-answer-row{font-size:13.5px;margin-bottom:4px;}
.review-answer-row .label{color:var(--color-text-muted);}
.review-answer-row .val-correct{color:var(--color-success);font-weight:600;}
.review-answer-row .val-wrong{color:var(--color-danger);font-weight:600;}
.review-item-marks{font-size:12.5px;color:var(--color-text-muted);margin-top:8px;}

/* =====================================================
   Responsive — tablet / mobile
   ===================================================== */
@media (max-width:900px){
  .quiz-body{grid-template-columns:1fr;}

  .palette-toggle{display:flex;}

  .palette-panel{
    position:fixed;
    top:0;right:0;
    height:100vh;
    width:min(320px,86vw);
    z-index:60;
    transform:translateX(100%);
    transition:transform .22s ease;
    box-shadow:-6px 0 24px rgba(15,20,30,.18);
  }
  .palette-panel.open{transform:translateX(0);}
  #btn-palette-close{display:flex;}

  .palette-overlay{
    display:block;
    position:fixed;inset:0;
    background:rgba(15,20,30,.45);
    z-index:50;
  }
  .palette-overlay.hidden{display:none;}

  .question-panel{padding:16px 14px 100px;}
  .question-nav-buttons{
    position:fixed;
    left:0;right:0;bottom:0;
    background:#fff;
    border-top:1px solid var(--color-border);
    padding:10px 12px;
    margin-top:0;
    z-index:15;
    gap:8px;
  }
  .question-nav-buttons #btn-prev,
  .question-nav-buttons #btn-next,
  .question-nav-buttons #btn-submit{
    flex:1;
    margin-left:0;
    padding-left:8px;
    padding-right:8px;
    font-size:13.5px;
  }
  .question-nav-buttons #btn-prev{order:1;}
  .question-nav-buttons #btn-submit{order:2;}
  .question-nav-buttons #btn-next{order:3;}

  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .result-grid{grid-template-columns:repeat(2,1fr);}
  .score-hero{gap:20px;padding:20px;}
}

@media (max-width:430px){
  .start-card{padding:26px 18px 22px;}
  .quiz-name{display:none;}
  .question-text{font-size:15.5px;}
  .modal-stats{grid-template-columns:repeat(3,1fr);}
}

/* Reduced motion */
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}