/* GD Mock Test — Dark UI */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0f172a;--surface:#1e293b;--card:#162032;--border:#2d3f55;
  --text:#e2e8f0;--muted:#94a3b8;--blue:#3b82f6;--green:#22c55e;
  --red:#ef4444;--yellow:#f59e0b;--purple:#a855f7;
  --radius:10px;--font:'Inter',system-ui,sans-serif
}
body.gd-mock-body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;margin:0}

/* TOPBAR */
.exam-topbar{position:fixed;top:0;left:0;right:0;height:56px;background:var(--surface);
  border-bottom:1px solid var(--border);display:flex;align-items:center;
  justify-content:space-between;padding:0 20px;z-index:1000;gap:12px}
.exam-topbar.simple{position:relative;margin-bottom:0}
.back-link{color:var(--blue);text-decoration:none;font-size:.9rem;white-space:nowrap}
.back-link:hover{text-decoration:underline}
.exam-title{display:flex;align-items:center;gap:8px;font-weight:600;font-size:.95rem;overflow:hidden}
.exam-title-sm{font-weight:600;font-size:.9rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.section-badge{background:var(--blue);color:#fff;font-size:.7rem;padding:2px 8px;border-radius:20px}
.exam-meta{display:flex;align-items:center;gap:12px;flex-shrink:0}
.q-counter{font-size:.85rem;color:var(--muted)}
.timer-box{background:#1a2744;border:1px solid var(--blue);border-radius:6px;
  padding:4px 12px;font-size:.95rem;font-weight:700;color:var(--blue);font-variant-numeric:tabular-nums}
.timer-box.warning{border-color:var(--yellow);color:var(--yellow)}
.timer-box.danger{border-color:var(--red);color:var(--red);animation:pulse 1s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}

/* EXAM LAYOUT */
.exam-layout{display:flex;gap:0;margin-top:56px;min-height:calc(100vh - 56px)}
.question-panel{flex:1;padding:24px;overflow-y:auto;max-width:calc(100% - 280px)}
.q-palette-panel{width:280px;background:var(--surface);border-left:1px solid var(--border);
  padding:16px;position:sticky;top:56px;height:calc(100vh - 56px);overflow-y:auto;flex-shrink:0}

/* QUESTION CARD */
.question-card{display:none;animation:fadeIn .2s ease}
.question-card.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.q-header{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.q-num{background:var(--blue);color:#fff;font-size:.8rem;font-weight:700;
  padding:3px 10px;border-radius:20px}
.q-section{color:var(--muted);font-size:.8rem}
.q-marks{margin-left:auto;font-size:.78rem;color:var(--green)}
.q-diff{font-size:.72rem;padding:2px 8px;border-radius:20px;font-weight:600}
.diff-easy{background:#14532d;color:var(--green)}
.diff-medium{background:#422006;color:var(--yellow)}
.diff-hard{background:#450a0a;color:var(--red)}

.q-text{font-size:1rem;line-height:1.7;margin-bottom:20px;padding:16px;
  background:var(--card);border-radius:var(--radius);border:1px solid var(--border)}
.q-text table{width:100%;border-collapse:collapse}
.q-text td,.q-text th{border:1px solid var(--border);padding:6px 10px;font-size:.85rem}

/* OPTIONS */
.options-grid{display:grid;gap:10px;margin-bottom:20px}
.option-label{display:flex;align-items:flex-start;gap:12px;padding:12px 16px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  cursor:pointer;transition:all .15s;user-select:none}
.option-label:hover{border-color:var(--blue);background:#162444}
.option-label input{display:none}
.option-label.selected{border-color:var(--blue);background:#1e3a5f}
.option-label.marked{border-color:var(--purple)!important;background:#1e1135!important}
.opt-badge{background:var(--surface);border:1px solid var(--border);min-width:28px;height:28px;
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:.8rem;font-weight:700;flex-shrink:0;margin-top:1px}
.option-label.selected .opt-badge{background:var(--blue);border-color:var(--blue);color:#fff}
.opt-text{font-size:.93rem;line-height:1.5}

/* Q ACTIONS */
.q-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:4px}
.q-actions button{padding:8px 16px;border:none;border-radius:6px;cursor:pointer;font-size:.85rem;font-weight:500;transition:.15s}
.btn-prev,.btn-next{background:var(--surface);color:var(--text);border:1px solid var(--border)}
.btn-prev:hover,.btn-next:hover{border-color:var(--blue);color:var(--blue)}
.btn-clear{background:transparent;color:var(--muted);border:1px solid var(--border)}
.btn-clear:hover{border-color:var(--red);color:var(--red)}
.btn-mark{background:transparent;color:var(--purple);border:1px solid var(--purple)}
.btn-mark:hover{background:#1e1135}
.btn-next,.btn-submit-q,.btn-submit-top,.btn-submit-sidebar,.btn-confirm-submit{
  margin-left:auto;background:var(--blue);color:#fff}
.btn-submit-q,.btn-submit-top,.btn-submit-sidebar,.btn-confirm-submit{background:var(--green);color:#fff}
.btn-submit-top{padding:6px 16px;border-radius:6px;border:none;cursor:pointer;font-size:.85rem}

/* PALETTE */
.palette-header{font-size:.8rem;font-weight:700;color:var(--muted);text-transform:uppercase;
  letter-spacing:.5px;margin-bottom:8px}
.palette-legend{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.leg{font-size:.72rem;padding:2px 8px;border-radius:20px}
.leg.answered{background:#1a3a2a;color:var(--green);border:1px solid var(--green)}
.leg.unanswered{background:var(--card);color:var(--muted);border:1px solid var(--border)}
.leg.marked{background:#1e1135;color:var(--purple);border:1px solid var(--purple)}
.palette-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin-bottom:16px}
.p-btn{border:none;border-radius:6px;padding:6px 0;font-size:.82rem;font-weight:600;cursor:pointer;transition:.15s}
.p-btn.unanswered{background:var(--card);color:var(--muted);border:1px solid var(--border)}
.p-btn.answered{background:#1a3a2a;color:var(--green);border:1px solid var(--green)}
.p-btn.marked{background:#1e1135;color:var(--purple);border:1px solid var(--purple)}
.p-btn.active-q{outline:2px solid var(--blue);outline-offset:1px}

.section-nav{border-top:1px solid var(--border);padding-top:12px;margin-top:4px}
.section-row{display:flex;justify-content:space-between;align-items:center;
  padding:5px 0;font-size:.8rem;border-bottom:1px solid rgba(255,255,255,.04)}
.sec-count{color:var(--muted);font-size:.75rem}
.score-preview{background:var(--card);border-radius:var(--radius);padding:12px;
  margin:12px 0;font-size:.83rem;display:flex;flex-direction:column;gap:4px}
.score-preview strong{color:var(--blue)}
.btn-submit-sidebar{width:100%;padding:10px;border:none;border-radius:var(--radius);
  background:var(--green);color:#fff;font-size:.9rem;font-weight:600;cursor:pointer}
.btn-submit-sidebar:hover{background:#16a34a}

/* MODAL */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:2000;
  display:flex;align-items:center;justify-content:center}
.modal-box{background:var(--surface);border:1px solid var(--border);border-radius:16px;
  padding:28px;max-width:400px;width:90%}
.modal-box h3{font-size:1.2rem;margin-bottom:16px}
.modal-stats{display:flex;flex-direction:column;gap:6px;margin-bottom:16px;font-size:.9rem}
.modal-warn{font-size:.82rem;color:var(--muted);margin-bottom:20px}
.modal-actions{display:flex;gap:10px;justify-content:flex-end}
.modal-actions button{padding:8px 20px;border-radius:8px;cursor:pointer;font-weight:600;border:none}
.modal-actions button:first-child{background:var(--card);color:var(--text);border:1px solid var(--border)}
.btn-confirm-submit{background:var(--green)!important;color:#fff!important}

/* RESULT PAGE */
.result-container{max-width:860px;margin:0 auto;padding:24px}
.score-card{display:flex;align-items:center;gap:28px;background:var(--surface);
  border-radius:16px;padding:28px;margin-bottom:20px;border:1px solid var(--border)}
.score-card.pass{border-color:var(--green)}
.score-card.fail{border-color:var(--red)}
.score-circle{position:relative;width:120px;height:120px;flex-shrink:0}
.score-circle svg{width:120px;height:120px}
.circle-text{position:absolute;inset:0;display:flex;flex-direction:column;
  align-items:center;justify-content:center}
.score-pct{font-size:1.4rem;font-weight:800}
.score-label{font-size:.75rem;color:var(--muted)}
.score-details h2{font-size:1.1rem;margin-bottom:8px}
.score-main{font-size:1.8rem;font-weight:800;color:var(--blue)}
.score-sub{color:var(--muted);font-size:.85rem;margin-top:4px}

.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:20px}
.stat-box{background:var(--surface);border-radius:var(--radius);padding:16px;
  text-align:center;border:1px solid var(--border)}
.stat-box.correct{border-color:var(--green)}
.stat-box.wrong{border-color:var(--red)}
.stat-box.unattempted{border-color:var(--yellow)}
.stat-num{font-size:1.8rem;font-weight:800}
.stat-box.correct .stat-num{color:var(--green)}
.stat-box.wrong .stat-num{color:var(--red)}
.stat-box.unattempted .stat-num{color:var(--yellow)}
.stat-box.marks .stat-num{color:var(--blue)}
.stat-label{font-size:.78rem;color:var(--muted);margin-top:4px}

.section-scores-card{background:var(--surface);border-radius:var(--radius);
  padding:20px;margin-bottom:20px;border:1px solid var(--border)}
.section-scores-card h3{margin-bottom:14px;font-size:1rem}
.sec-table{width:100%;border-collapse:collapse;font-size:.88rem}
.sec-table th{text-align:left;padding:8px 12px;border-bottom:1px solid var(--border);
  color:var(--muted);font-weight:600}
.sec-table td{padding:8px 12px;border-bottom:1px solid rgba(255,255,255,.04)}
.sec-table td.tc{text-align:center}
.sec-table td.correct{color:var(--green)}
.sec-table td.wrong{color:var(--red)}

.result-actions{display:flex;gap:12px;margin-bottom:28px;flex-wrap:wrap}
.btn-retake,.btn-dashboard{padding:10px 24px;border-radius:8px;text-decoration:none;
  font-weight:600;font-size:.9rem;border:none;cursor:pointer}
.btn-retake{background:var(--blue);color:#fff}
.btn-dashboard{background:var(--surface);color:var(--text);border:1px solid var(--border)}

/* ANSWER KEY */
.answer-key-section h3{margin-bottom:16px;font-size:1rem}
.ak-section-header{font-weight:700;font-size:.85rem;color:var(--blue);text-transform:uppercase;
  letter-spacing:.5px;padding:8px 0;border-bottom:1px solid var(--border);margin:20px 0 12px}
.ak-card{background:var(--surface);border-radius:var(--radius);padding:16px;
  margin-bottom:12px;border:1px solid var(--border)}
.ak-card.correct{border-left:3px solid var(--green)}
.ak-card.wrong{border-left:3px solid var(--red)}
.ak-card.skipped{border-left:3px solid var(--yellow);opacity:.75}
.ak-q-header{display:flex;justify-content:space-between;margin-bottom:10px}
.ak-num{font-size:.8rem;font-weight:700;color:var(--muted)}
.ak-status{font-size:.8rem;font-weight:600}
.ak-card.correct .ak-status{color:var(--green)}
.ak-card.wrong .ak-status{color:var(--red)}
.ak-card.skipped .ak-status{color:var(--yellow)}
.ak-question{font-size:.93rem;line-height:1.6;margin-bottom:12px}
.ak-options{display:grid;gap:6px;margin-bottom:8px}
.ak-opt{display:flex;align-items:center;gap:10px;padding:8px 12px;
  border-radius:8px;font-size:.85rem;background:var(--card)}
.correct-opt{background:#14532d!important;border:1px solid var(--green)}
.wrong-opt{background:#450a0a!important;border:1px solid var(--red)}
.ak-opt-badge{font-weight:700;font-size:.8rem;min-width:22px}
.correct-tick{margin-left:auto;color:var(--green);font-weight:700}
.ak-explanation{font-size:.83rem;color:var(--muted);background:var(--bg);
  border-radius:6px;padding:10px 12px;border-left:3px solid var(--blue);margin-top:8px}

/* DASHBOARD */
.dashboard-container{max-width:1000px;margin:0 auto;padding:24px}
.dash-section{margin-bottom:36px}
.dash-section h2{font-size:1.1rem;margin-bottom:16px;padding-bottom:8px;
  border-bottom:1px solid var(--border)}
.exam-list-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.exam-card-dash{background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px;transition:.2s}
.exam-card-dash:hover{border-color:var(--blue)}
.ecd-org{font-size:.75rem;color:var(--blue);font-weight:700;text-transform:uppercase;
  letter-spacing:.5px;margin-bottom:4px}
.ecd-name{font-size:1rem;font-weight:600;margin-bottom:8px}
.ecd-meta{font-size:.78rem;color:var(--muted);margin-bottom:14px}
.btn-start-exam{display:inline-block;background:var(--blue);color:#fff;
  text-decoration:none;padding:8px 18px;border-radius:6px;font-size:.85rem;font-weight:600}
.btn-start-exam:hover{background:#2563eb}

.attempt-table{width:100%;border-collapse:collapse;font-size:.88rem}
.attempt-table th{text-align:left;padding:8px 12px;border-bottom:1px solid var(--border);
  color:var(--muted);font-weight:600}
.attempt-table td{padding:8px 12px;border-bottom:1px solid rgba(255,255,255,.04)}
.attempt-table td.pass{color:var(--green);font-weight:700}
.attempt-table td.fail{color:var(--red);font-weight:700}
.attempt-table td.correct{color:var(--green)}
.attempt-table td.wrong{color:var(--red)}
.btn-view-result{background:var(--surface);border:1px solid var(--border);
  color:var(--text);padding:4px 12px;border-radius:6px;text-decoration:none;font-size:.8rem}
.btn-view-result:hover{border-color:var(--blue);color:var(--blue)}

.login-prompt{background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:24px;text-align:center;margin-bottom:24px}
.login-prompt p{color:var(--muted);margin-bottom:14px}
.btn-login{background:var(--blue);color:#fff;text-decoration:none;
  padding:10px 24px;border-radius:8px;font-weight:600}
.loading-msg,.no-data{color:var(--muted);font-size:.9rem;padding:20px 0}
.user-name{font-size:.85rem;color:var(--muted)}
.nav-link-sm{font-size:.85rem;color:var(--blue);text-decoration:none}
.nav-link-sm:hover{text-decoration:underline}

/* RESPONSIVE */
@media(max-width:768px){
  .exam-layout{flex-direction:column}
  .question-panel{max-width:100%;padding:16px}
  .q-palette-panel{width:100%;position:static;height:auto;border-left:none;
    border-top:1px solid var(--border)}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .score-card{flex-direction:column;text-align:center}
  .exam-list-grid{grid-template-columns:1fr}
}