@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:wght@600;700&family=Inter:wght@400;500;600;700&display=swap');

:root{
  --navy:#173154;
  --navy-deep:#0E1F35;
  --blue:#2C4E86;
  --bg:#F4F5F6;
  --card:#FFFFFF;
  --line:#DDE1E7;
  --text:#1B1E24;
  --muted:#5B6472;
  --success:#1E6B4A;
  --success-bg:#E7F3ED;
  --danger:#9B3244;
  --danger-bg:#FBEDEF;
  --flag:#8A6D1F;
  --flag-bg:#F5EEDD;
  --radius:5px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  min-height:100vh;
  padding-bottom:24px;
}

.wrap{max-width:640px;margin:0 auto;padding:48px 20px}

.brand{text-align:center;margin-bottom:32px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.brand-text{font-family:'Source Serif 4',Georgia,serif;font-weight:700;font-size:20px;letter-spacing:.2px;color:var(--navy)}
.brand-text span{display:block;font-family:'Inter';font-weight:500;font-size:12.5px;color:var(--muted);margin-top:3px;letter-spacing:.2px}

.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:32px;
}

h1{font-family:'Source Serif 4',Georgia,serif;font-size:22px;font-weight:700;margin:0 0 6px}
h2{font-family:'Source Serif 4',Georgia,serif;font-size:16.5px;font-weight:600;margin:0 0 4px}
p.lead{color:var(--muted);font-size:14.5px;margin:0 0 24px;line-height:1.5}

label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin-bottom:6px}
input[type=text],input[type=password],input[type=email],input[type=number],textarea,select{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:4px;
  font-size:14.5px;font-family:'Inter';color:var(--text);background:#fff;margin-bottom:16px;
}
input:focus,textarea:focus,select:focus{outline:2px solid var(--blue);outline-offset:1px;border-color:var(--blue)}

button{
  font-family:'Inter';font-weight:600;font-size:14.5px;
  border:none;border-radius:4px;padding:12px 20px;cursor:pointer;
  transition:transform .08s ease, opacity .15s ease;
}
button:active{transform:scale(.98)}
.btn-primary{background:var(--navy);color:#fff;width:100%}
.btn-primary:hover{opacity:.92}
.btn-secondary{background:#fff;border:1.5px solid var(--line);color:var(--text)}
.btn-danger{background:var(--danger-bg);color:var(--danger)}
.btn-ghost{background:transparent;color:var(--muted);padding:8px 10px}

.error-box{background:var(--danger-bg);color:var(--danger);border-radius:4px;padding:12px 14px;font-size:13.5px;margin-bottom:16px;display:none}
.error-box.show{display:block}

.badge{display:inline-block;font-size:12.5px;font-weight:600;padding:4px 10px;border-radius:999px}
.badge-pass{background:var(--success-bg);color:var(--success)}
.badge-fail{background:var(--danger-bg);color:var(--danger)}

/* ---- Exam-taking layout ---- */
.exam-shell{display:flex;flex-direction:column;min-height:100vh;background:var(--bg)}
.exam-top{
  background:var(--navy);color:#fff;padding:13px 24px;
  display:flex;align-items:center;justify-content:space-between;
  position:sticky;top:0;z-index:10;
}
.exam-top .section-name{font-family:'Inter';font-weight:600;font-size:15px;letter-spacing:.2px}
.overall-time-box{
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#fff;
  padding:6px 14px;border-radius:6px;font-weight:700;font-size:13px;letter-spacing:.2px;white-space:nowrap;
}
.overall-time-box.low{background:var(--danger-bg);border-color:var(--danger);color:var(--danger)}

/* ---- Admin: Appearance / color customization ---- */
.appearance-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:20px;max-width:700px}
.appearance-field label{display:block;font-weight:600;font-size:13.5px;margin-bottom:4px}
.color-input-row{display:flex;align-items:center;gap:8px}
.color-input-row input[type="color"]{width:42px;height:36px;padding:2px;border:1px solid var(--line);border-radius:5px;cursor:pointer;flex-shrink:0}
.color-input-row input[type="text"]{font-family:monospace;text-transform:uppercase}
.appearance-preview{max-width:700px;margin-top:28px;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.appearance-preview-top{background:var(--preview-navy,#173154);color:#fff;padding:14px 18px;font-family:'Source Serif 4',Georgia,serif;font-weight:700;font-size:16px}
.appearance-preview-body{background:var(--preview-bg,#F4F5F6);padding:24px 18px;display:flex;align-items:center;gap:18px}
.appearance-preview-body .btn-primary{background:var(--preview-navy,#173154);padding:10px 20px}
.appearance-preview-link{color:var(--preview-blue,#2C4E86);font-weight:600;font-size:14px}
.nav-toggle-btn{
  display:none;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#fff;
  padding:7px 14px;border-radius:6px;font-size:13px;font-weight:600;
}

.exam-body{flex:1;display:flex;max-width:1180px;margin:0 auto;width:100%;padding:24px;gap:20px;align-items:flex-start}

/* Left: question meta panel (number / status / marks / flag) */
.q-meta-panel{width:170px;flex-shrink:0}
.q-meta-box{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:16px}
.q-meta-label{font-family:'Inter';font-weight:700;font-size:14.5px;margin-bottom:10px}
.q-meta-status{font-size:12.5px;color:var(--muted);margin-bottom:4px}
.q-meta-marks{font-size:12.5px;color:var(--muted);margin-bottom:14px}
.flag-link{
  display:flex;align-items:center;gap:6px;background:transparent;border:none;
  color:var(--blue);font-size:13px;font-weight:600;padding:0;cursor:pointer;
}
.flag-link .flag-icon{color:var(--muted);font-size:14px}
.flag-link.active .flag-icon{color:var(--flag)}
.flag-link.active{color:var(--flag)}

/* Center: the question card itself */
.exam-main{flex:1;min-width:0;background:var(--card);border:1px solid var(--line);border-radius:6px;padding:28px;position:relative}
.time-box{
  display:inline-block;border:1px solid var(--line);border-radius:6px;padding:7px 16px;
  font-family:'Inter';font-weight:700;font-size:14.5px;color:var(--text);
  float:right;margin:-4px 0 18px 16px;background:#FAFBFD;
}
.time-box.low{border-color:var(--danger);color:var(--danger);background:var(--danger-bg)}
.q-text{font-size:16px;font-weight:500;line-height:1.6;margin-bottom:22px;clear:none}
.choice{
  display:flex;align-items:flex-start;gap:12px;padding:12px 14px;border:1px solid transparent;
  border-radius:6px;margin-bottom:2px;cursor:pointer;transition:background-color .1s;
}
.choice:hover{background:#F5F7FB}
.choice.selected{background:#EEF1F7}
.choice-letter{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;border:1.5px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:11.5px;font-weight:700;color:var(--muted);
  margin-top:1px;
}
.choice.selected .choice-letter{background:var(--navy);border-color:var(--navy);color:#fff}
.choice input{display:none}
.choice span.choice-text{font-size:14.5px;line-height:1.5;padding-top:2px}

/* Right: quiz navigation panel */
.exam-nav{width:230px;flex-shrink:0;background:var(--card);border:1px solid var(--line);border-radius:6px;padding:16px}
.nav-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.nav-header h2{font-size:14px;margin:0}
.nav-close-btn{display:none;background:transparent;border:none;color:var(--muted);font-size:15px;padding:2px 6px}
.q-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin-bottom:16px}
.q-dot{
  position:relative;aspect-ratio:1;border-radius:5px;border:1px solid var(--line);background:#fff;
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;
  cursor:pointer;color:var(--muted);
}
.q-dot.answered{background:var(--navy);border-color:var(--navy);color:#fff}
.q-dot.current{border-color:var(--blue);border-width:2px;box-shadow:0 0 0 1px var(--blue)}
.q-dot.flagged{box-shadow:inset 0 0 0 2px var(--flag)}
.q-dot.flagged::after{content:"⚑";position:absolute;top:-6px;right:-4px;font-size:9px;color:var(--flag)}
.nav-section-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.3px;color:var(--muted);margin:14px 0 7px}
.nav-section-label:first-child{margin-top:0}

.exam-footer{display:flex;justify-content:space-between;padding:16px 24px;background:#fff;border-top:1px solid var(--line);margin-bottom:64px}

.q-number{font-size:12.5px;font-weight:700;color:var(--blue);letter-spacing:.4px;text-transform:uppercase;margin-bottom:10px}

/* ---- Result-page promotion card ---- */
.ad-card{margin-top:16px;border-top:3px solid var(--blue);animation:ad-in .35s ease}
.ad-eyebrow{font-size:11.5px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;color:var(--blue);margin-bottom:10px}
.ad-message{font-size:14.5px;line-height:1.6;color:var(--text);margin:0 0 18px}
.ad-actions{display:flex;gap:10px;flex-wrap:wrap}
.ad-btn{
  flex:1;min-width:180px;text-align:center;text-decoration:none;
  display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;
}
@keyframes ad-in{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

.lock-overlay{
  position:fixed;inset:0;background:rgba(12,27,51,.92);color:#fff;
  display:none;align-items:center;justify-content:center;flex-direction:column;z-index:999;text-align:center;padding:24px;
}
.lock-overlay.show{display:flex}
.lock-overlay h2{color:#fff;font-size:20px}

/* ---- Admin ---- */
.admin-shell{display:flex;min-height:100vh}
.admin-side{width:220px;background:var(--navy-deep);color:#fff;padding:20px 14px;flex-shrink:0}
.admin-side .brand{text-align:left;border-bottom:1px solid rgba(255,255,255,.14)}
.admin-side .brand-text{color:#fff}
.admin-side .brand-text span{color:#9FB0CE}
.side-link{display:block;padding:10px 12px;border-radius:5px;color:#C7D2E6;text-decoration:none;font-size:14px;font-weight:500;margin-bottom:4px;cursor:pointer}
.side-link:hover,.side-link.active{background:rgba(255,255,255,.08);color:#fff}
.admin-main{flex:1;padding:32px 40px;max-width:1200px}
.admin-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}

table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden}
th,td{text-align:left;padding:12px 14px;font-size:14px;border-bottom:1px solid var(--line);white-space:nowrap}
th{background:#FAFBFD;color:var(--muted);font-weight:600;font-size:12.5px;text-transform:uppercase;letter-spacing:.3px}
tr:last-child td{border-bottom:none}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:6px}
.table-scroll table{border-radius:0}

.stat-row{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:24px}
.stat-card{flex:1 1 150px;min-width:150px;background:#fff;border:1px solid var(--line);border-radius:6px;padding:16px 18px}
.stat-card .num{font-family:'Inter';font-size:24px;font-weight:700}
.stat-card .label{font-size:12px;color:var(--muted);font-weight:600;margin-top:2px;line-height:1.4}

.modal-bg{position:fixed;inset:0;background:rgba(12,27,51,.5);display:none;align-items:center;justify-content:center;z-index:100}
.modal-bg.show{display:flex}
.modal{background:#fff;border-radius:6px;padding:28px;width:480px;max-width:92vw;max-height:88vh;overflow:auto}

.bulk-format-example{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;
  font-family:monospace;font-size:12.5px;line-height:1.6;color:var(--text);
  white-space:pre-wrap;margin:12px 0;
}
.bulk-preview-list{max-height:320px;overflow-y:auto;border:1px solid var(--line);border-radius:var(--radius)}
.bulk-preview-item{padding:12px 14px;border-bottom:1px solid var(--line);font-size:13.5px}
.bulk-preview-item:last-child{border-bottom:none}
.bulk-preview-item .bp-q{font-weight:600;margin-bottom:6px}
.bulk-preview-item ul{margin:0;padding-left:18px;color:var(--muted)}
.bulk-preview-item li.correct{color:var(--success);font-weight:600}
.bulk-warning{background:var(--danger-bg);color:var(--danger);border-radius:var(--radius);padding:10px 14px;font-size:13px;margin-bottom:10px}

.row-flex{display:flex;gap:10px;align-items:center}
.small-btn{padding:6px 10px;font-size:12.5px}
.muted{color:var(--muted);font-size:13px}
.hidden{display:none !important}

/* ---- Reorder controls & quick toggles (admin) ---- */
.order-btns{display:flex;flex-direction:column;gap:2px}
.order-btns button{padding:1px 7px;font-size:10px;line-height:1.6;background:#fff;border:1px solid var(--line);color:var(--muted);border-radius:3px}
.order-btns button:hover:not(:disabled){background:var(--bg);color:var(--text)}
.order-btns button:disabled{opacity:.3;cursor:default}
.badge-toggle{cursor:pointer;border:none;font-family:inherit}
.badge-toggle:hover{opacity:.85}
.side-link.disabled{opacity:.4;cursor:default;pointer-events:none}

/* ---- Pre-exam instructions screen ---- */
.instructions-wrap{max-width:720px;margin:0 auto;padding:56px 20px}
.instructions-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:40px}
.instructions-card h1{font-size:24px;margin-bottom:4px}
.instructions-card .subtitle{color:var(--muted);font-size:14.5px;margin-bottom:24px}
.instructions-body{font-size:14.5px;line-height:1.6;color:var(--text);margin-bottom:28px;white-space:pre-wrap}
.section-summary{border:1px solid var(--line);border-radius:5px;margin-bottom:24px;overflow:hidden}
.section-summary-row{display:flex;justify-content:space-between;padding:12px 16px;font-size:14px;border-bottom:1px solid var(--line)}
.section-summary-row:last-child{border-bottom:none}
.section-summary-row .s-name{font-weight:600}
.section-summary-row .s-time{color:var(--muted)}
.rules-list{list-style:none;padding:0;margin:0 0 28px}
.rules-list li{display:flex;gap:10px;font-size:14px;color:var(--text);padding:8px 0;border-bottom:1px solid var(--line)}
.rules-list li:last-child{border-bottom:none}
.rules-list li::before{content:"—";color:var(--blue);flex-shrink:0}

/* ---- Toasts ---- */
.toast-stack{position:fixed;top:20px;right:20px;left:20px;z-index:200;display:flex;flex-direction:column;align-items:flex-end;gap:10px;pointer-events:none}
.toast{
  background:var(--navy);color:#fff;padding:14px 18px;border-radius:5px;font-size:13.5px;
  box-shadow:0 8px 24px rgba(12,27,51,.25);animation:toast-in .2s ease;
  max-width:320px;width:100%;pointer-events:auto;
}
.toast.warn{background:var(--flag)}
.toast.danger{background:var(--danger)}
@keyframes toast-in{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}

/* ---- Save status indicator (top bar) ---- */
.save-status{font-size:12.5px;color:#C7D2E6}
.save-status.error{color:#FFD3D3;font-weight:600}

/* ---- Review-before-submit screen ---- */
.review-row{
  display:flex;justify-content:space-between;align-items:center;padding:11px 14px;
  border:1px solid var(--line);border-radius:5px;margin-bottom:8px;font-size:13.5px;cursor:pointer;
}
.review-row:hover{border-color:var(--blue)}
.review-row .r-status{font-weight:600}
.review-row.answered .r-status{color:var(--success)}
.review-row.unanswered .r-status{color:var(--danger)}
.review-row .r-flag{color:var(--flag);margin-left:8px;font-size:12px}

/* ---- Passage panel (reading comprehension) ---- */
.exam-main.with-passage{display:flex;gap:24px;padding:0}
.passage-panel{
  flex:1;max-width:380px;background:#FAFBFD;border-right:1px solid var(--line);
  padding:28px 24px;overflow-y:auto;max-height:70vh;
}
.passage-panel h3{font-family:'Inter';font-size:15px;margin:0 0 12px}
.passage-panel .passage-text{font-size:14px;line-height:1.65;color:var(--text);white-space:pre-wrap}
.passage-panel img{max-width:100%;border-radius:5px;margin-bottom:14px}
.question-panel{flex:1.3;padding:32px 32px 32px 0}
.question-panel.no-passage{padding:0}
.q-image{max-width:100%;border-radius:5px;margin-bottom:20px}

/* ---- Responsive ---- */
@media (max-width: 860px){
  .exam-body{flex-direction:column;padding:16px}
  .exam-main{padding:18px}
  .q-meta-panel{width:100%}
  .q-meta-box{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:12px 16px}
  .q-meta-marks{display:none}
  .nav-toggle-btn{display:inline-block}
  .exam-nav{
    display:none;position:fixed;inset:0 0 0 auto;width:88vw;max-width:340px;z-index:50;
    border-radius:0;overflow-y:auto;box-shadow:-8px 0 24px rgba(0,0,0,.12);
  }
  .exam-nav.nav-open{display:block}
  .nav-close-btn{display:inline-block}
  .q-grid{grid-template-columns:repeat(6,1fr)}
  .exam-main.with-passage{flex-direction:column;padding:0}
  .exam-main.with-passage .question-panel{padding:18px !important}
  .passage-panel{max-width:none;max-height:none;border-right:none;border-bottom:1px solid var(--line);padding:18px}
  .time-box{float:none;display:block;width:fit-content;margin:0 0 16px}
  .exam-top{padding:12px 16px;flex-wrap:wrap;gap:8px}
  .exam-footer{padding:12px 16px;gap:10px}
  .exam-footer button{flex:1}
  .instructions-wrap{padding:32px 16px}
  .instructions-card{padding:24px}
  .toast-stack{top:12px;right:12px;left:12px}
  .toast{max-width:none}
  .admin-shell{flex-direction:column}
  .admin-side{width:100%;display:flex;align-items:center;gap:4px;padding:12px 14px;overflow-x:auto}
  .admin-side .brand{margin-bottom:0;margin-right:8px;flex-shrink:0;padding-bottom:0;border-bottom:none}
  .side-link{flex-shrink:0;white-space:nowrap}
  .admin-main{padding:20px}
  .admin-header{flex-wrap:wrap;gap:10px}
  .stat-row{flex-wrap:wrap}
  .stat-card{min-width:130px}
  table{font-size:13px}
  th,td{padding:9px 10px}
  .modal{width:94vw;padding:22px}
}
@media (max-width: 480px){
  .card{padding:22px}
  .q-grid{grid-template-columns:repeat(5,1fr)}
  .instructions-card{padding:18px}
  .brand-text{font-size:15px}
  h1{font-size:19px}
  .exam-footer{flex-direction:column-reverse}
  .exam-footer button{width:100%}
  .ad-actions{flex-direction:column}
  .ad-btn{width:100%}
}