/* ── VARIABLES ── */
:root {
  --bg:        #f0f2f5;
  --surface:   #ffffff;
  --surface2:  #f9fafb;
  --border:    #e5e7eb;
  --border2:   #d1d5db;
  --text1:     #111827;
  --text2:     #374151;
  --text3:     #6b7280;
  --text4:     #9ca3af;
  --blue:      #1cb0f6;
  --blue-bg:   #e8f7ff;
  --blue-dark: #1d4ed8;
  --blue-dark-bg: #dbeafe;
  --green:     #58cc02;
  --green-bg:  #d7f5c2;
  --green-text:#166534;
  --red:       #ef4444;
  --red-bg:    #fef2f2;
  --red-text:  #991b1b;
  --amber-bg:  #fef3c7;
  --amber-text:#92400e;
  --purple:    #7c3aed;
  --purple-bg: #f5f3ff;
  --shadow:    0 1px 4px rgba(0,0,0,.08);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
}
[data-theme="dark"] {
  --bg:        #0f1117;
  --surface:   #1a1d27;
  --surface2:  #22263a;
  --border:    #2e3347;
  --border2:   #3d4259;
  --text1:     #f1f5f9;
  --text2:     #cbd5e1;
  --text3:     #94a3b8;
  --text4:     #64748b;
  --blue-bg:   #0c2340;
  --blue-dark-bg: #1e3a5f;
  --green-bg:  #14301a;
  --green-text:#4ade80;
  --red-bg:    #2d0f0f;
  --red-text:  #f87171;
  --amber-bg:  #2d1f05;
  --amber-text:#fbbf24;
  --purple-bg: #1e1040;
  --shadow:    0 1px 4px rgba(0,0,0,.4);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
}

/* ── RESET & BASE ── */
*{box-sizing:border-box;margin:0;padding:0;}
sup.tm{font-size:.5em;vertical-align:super;line-height:0;font-weight:600;}
body{font-family:'Nunito Sans',sans-serif;background:var(--bg);color:var(--text1);min-height:100vh;display:flex;justify-content:center;padding:24px 16px 80px;transition:background .25s,color .25s;}
#app{width:100%;max-width:780px;display:flex;flex-direction:column;gap:1rem;}
.screen{display:none;flex-direction:column;gap:1rem;}
.screen.active{display:flex;}

/* ── DARK/LIGHT TOGGLE (fixed top-right) ── */
#theme-toggle{
  position:fixed;top:16px;right:16px;z-index:999;
  width:44px;height:44px;border-radius:50%;
  border:1.5px solid var(--border2);
  background:var(--surface);
  cursor:pointer;font-size:20px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow);
  transition:background .2s,border-color .2s,transform .15s;
}
#theme-toggle:hover{transform:scale(1.08);}

/* ── PROFILE BUTTON (top-right, left of theme toggle) ── */
#profile-btn{
  position:fixed;top:16px;right:72px;z-index:999;
  width:44px;height:44px;border-radius:50%;
  border:1.5px solid var(--border2);
  background:var(--surface);
  color:var(--text1);
  cursor:pointer;
  font-family:'Nunito',sans-serif;font-size:14px;font-weight:800;
  display:none;align-items:center;justify-content:center;
  box-shadow:var(--shadow);
  transition:background .2s,border-color .2s,transform .15s;
}
#profile-btn.visible{display:flex;}
#profile-btn:hover{transform:scale(1.08);border-color:var(--blue);}

/* ── PROFILE SCREEN ── */
.profile-card{
  background:var(--surface);
  border-radius:16px;
  padding:22px 24px;
  display:flex;align-items:center;gap:18px;
  box-shadow:var(--shadow-sm);
}
.profile-avatar{
  width:60px;height:60px;border-radius:50%;
  background:linear-gradient(135deg,#1cb0f6,#7c3aed);
  color:#fff;
  font-family:'Nunito',sans-serif;font-size:22px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
}
.profile-info{flex:1;min-width:0;}
.profile-name{
  font-family:'Nunito',sans-serif;font-size:18px;font-weight:800;
  color:var(--text1);margin-bottom:4px;
}
.profile-email{
  font-size:13px;color:var(--text3);
  word-break:break-all;
}
.profile-userid{
  font-family:monospace;font-size:11px;color:var(--text4);
  margin-top:4px;letter-spacing:.04em;
}
#profile-attempts{display:flex;flex-direction:column;gap:8px;}
.profile-empty{
  background:var(--surface);
  border-radius:12px;
  padding:24px;
  text-align:center;
  color:var(--text3);
  font-size:14px;
  box-shadow:var(--shadow-sm);
}
.attempt-item{
  background:var(--surface);
  border:2px solid var(--border);
  border-radius:12px;
  padding:14px 18px;
  display:flex;align-items:center;gap:14px;
  box-shadow:var(--shadow-sm);
  transition:border-color .12s,transform .12s;
}
.attempt-item.clickable{cursor:pointer;}
.attempt-item.clickable:hover{border-color:var(--blue);transform:translateY(-1px);}
.attempt-meta{flex:1;min-width:0;}
.attempt-type{
  font-family:'Nunito',sans-serif;font-size:14px;font-weight:800;
  color:var(--text1);margin-bottom:3px;
}
.attempt-date{font-size:12px;color:var(--text3);}
.attempt-score{text-align:right;flex-shrink:0;}
.attempt-pct{
  font-family:'Nunito',sans-serif;font-size:20px;font-weight:800;
  line-height:1.1;
}
.attempt-verdict{
  font-size:10px;font-weight:800;letter-spacing:.06em;
  margin-top:2px;
}
.attempt-verdict.pass{color:#16a34a;}
.attempt-verdict.fail{color:var(--red);}

/* ── HUB (root home) ── */
.hub-hero{background:var(--surface);border-radius:20px;padding:44px 32px 36px;text-align:center;box-shadow:var(--shadow);}
.hub-title{font-family:'Nunito',sans-serif;font-size:28px;font-weight:800;color:var(--text1);margin-bottom:8px;}
.hub-sub{color:var(--text3);font-size:15px;line-height:1.65;}
.hub-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.hub-tile{background:var(--surface);border-radius:16px;padding:32px 16px 28px;text-align:center;cursor:pointer;border:2.5px solid var(--border);transition:border-color .15s,box-shadow .15s,transform .12s,opacity .15s;box-shadow:var(--shadow-sm);}
.hub-tile:hover{border-color:var(--blue);box-shadow:0 4px 20px rgba(28,176,246,.18);transform:translateY(-2px);}
.hub-tile.inactive{opacity:.55;cursor:pointer;}
.hub-tile.inactive:hover{border-color:var(--text4);box-shadow:none;transform:none;}
.hub-tile-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.09em;color:var(--text3);margin-bottom:8px;}
.hub-tile-name{font-family:'Nunito',sans-serif;font-size:20px;font-weight:800;color:var(--text1);}
.hub-tile-desc{font-size:12px;color:var(--text3);margin-top:6px;line-height:1.5;}
.hub-tile-badge{display:inline-block;margin-top:10px;padding:3px 10px;border-radius:99px;font-size:11px;font-weight:700;}
.badge-active{background:var(--green-bg);color:var(--green-text);}
.badge-soon{background:var(--amber-bg);color:var(--amber-text);}

/* ── GENAI HOME (pack selector) ── */
.page-header{background:var(--surface);border-radius:16px;padding:20px 22px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow-sm);}
.back-btn{padding:7px 14px;border:1.5px solid var(--border2);border-radius:10px;background:transparent;color:var(--text2);font-family:'Nunito',sans-serif;font-size:13px;font-weight:700;cursor:pointer;transition:border-color .12s,background .12s;white-space:nowrap;}
.back-btn:hover{border-color:var(--blue);background:var(--blue-bg);}
.page-header-title{font-family:'Nunito',sans-serif;font-size:17px;font-weight:800;color:var(--text1);flex:1;}
.info-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;}
.info-card{background:var(--surface);border-radius:12px;padding:14px;text-align:center;box-shadow:var(--shadow-sm);}
.info-card .val{font-family:'Nunito',sans-serif;font-size:20px;font-weight:800;color:var(--text1);}
.info-card .lbl{font-size:12px;color:var(--text3);margin-top:3px;}
.pack-section-label{font-family:'Nunito',sans-serif;font-size:14px;font-weight:700;color:var(--text3);}
.pack-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.pack-card{background:var(--surface);border-radius:16px;padding:28px 16px;text-align:center;cursor:pointer;border:2.5px solid var(--border);transition:border-color .15s,box-shadow .15s,transform .12s;box-shadow:var(--shadow-sm);}
.pack-card:hover{border-color:var(--blue);box-shadow:0 4px 16px rgba(28,176,246,.15);transform:translateY(-2px);}
.pack-card-title{font-family:'Nunito',sans-serif;font-size:17px;font-weight:800;color:var(--text1);}

/* ── EXAM ── */
.exam-header{background:var(--surface);border-radius:16px;padding:13px 18px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow-sm);}
.exam-title{font-family:'Nunito',sans-serif;font-weight:800;font-size:15px;color:var(--text1);flex:1;}
.timer{font-family:'Nunito',sans-serif;font-size:18px;font-weight:800;color:var(--text1);min-width:58px;text-align:center;}
.timer.warning{color:#f59e0b;}
.timer.danger{color:var(--red);animation:blink 1s infinite;}
@keyframes blink{0%,100%{opacity:1;}50%{opacity:.45;}}
.leave-btn{padding:6px 12px;border:1.5px solid #fca5a5;border-radius:8px;background:transparent;color:#dc2626;font-family:'Nunito',sans-serif;font-size:12px;font-weight:700;cursor:pointer;transition:background .12s;}
.leave-btn:hover{background:var(--red-bg);}
.progress-bar-wrap{height:5px;background:var(--border);border-radius:99px;overflow:hidden;}
.progress-bar-fill{height:100%;border-radius:99px;background:var(--green);transition:width .3s ease;}
.exam-body{display:grid;grid-template-columns:190px 1fr;gap:12px;align-items:start;}
.q-nav{background:var(--surface);border-radius:14px;padding:14px;box-shadow:var(--shadow-sm);position:sticky;top:16px;}
.q-nav-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text4);margin-bottom:10px;}
.q-nav-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:4px;}
.qnb{width:100%;aspect-ratio:1;border-radius:7px;border:none;font-family:'Nunito',sans-serif;font-size:11px;font-weight:700;cursor:pointer;background:var(--surface2);color:var(--text3);transition:background .1s,color .1s;}
.qnb:hover{background:var(--border);}
.qnb.answered{background:var(--blue-dark-bg);color:var(--blue-dark);}
.qnb.flagged{background:var(--amber-bg);color:var(--amber-text);}
.qnb.cur{background:var(--blue);color:#fff;}
.qnb.answered.cur{background:var(--blue-dark);color:#fff;}
.nav-legend{display:flex;flex-direction:column;gap:4px;margin-top:10px;}
.nav-legend-item{display:flex;align-items:center;gap:5px;font-size:11px;color:var(--text3);}
.nav-legend-dot{width:11px;height:11px;border-radius:3px;flex-shrink:0;}
.answered-bar{margin-top:12px;padding-top:12px;border-top:1px solid var(--border);}
.answered-bar .lbl{font-size:11px;color:var(--text4);margin-bottom:3px;}
.answered-bar .val{font-family:'Nunito',sans-serif;font-size:17px;font-weight:800;color:var(--text1);}
.q-panel{background:var(--surface);border-radius:14px;padding:20px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:14px;}
.q-header{display:flex;justify-content:space-between;align-items:center;}
.q-num-lbl{font-size:12px;font-weight:700;color:var(--text4);}
.flag-btn{background:none;border:1.5px solid var(--border2);border-radius:8px;padding:4px 10px;font-size:12px;cursor:pointer;color:var(--text3);font-weight:600;transition:border-color .12s,background .12s;}
.flag-btn.flagged{border-color:#f59e0b;background:var(--amber-bg);color:var(--amber-text);}
.q-text{font-family:'Nunito',sans-serif;font-size:15px;font-weight:700;line-height:1.6;color:var(--text1);white-space:pre-wrap;}
.multi-hint{font-size:12px;color:var(--purple);font-weight:700;background:var(--purple-bg);padding:5px 11px;border-radius:6px;display:inline-block;}
.options-list{display:flex;flex-direction:column;gap:8px;}
.opt-btn{width:100%;padding:12px 14px;border:2px solid var(--border);border-radius:12px;background:var(--surface);color:var(--text1);font-family:'Nunito Sans',sans-serif;font-size:14px;font-weight:600;cursor:pointer;text-align:left;line-height:1.45;display:flex;align-items:flex-start;gap:10px;transition:border-color .12s,background .12s;}
.opt-btn:hover{border-color:var(--blue);background:var(--blue-bg);}
.opt-btn.selected{border-color:var(--blue-dark);background:var(--blue-dark-bg);color:var(--blue-dark);}
[data-theme="dark"] .opt-btn.selected{color:var(--text1);}
.opt-letter{width:22px;height:22px;border-radius:50%;background:var(--border);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:800;flex-shrink:0;margin-top:1px;color:var(--text2);}
.opt-btn.selected .opt-letter{background:var(--blue-dark);color:#fff;}
.exam-footer{background:var(--surface);border-radius:14px;padding:13px 18px;display:flex;gap:10px;justify-content:space-between;box-shadow:var(--shadow-sm);}
.nav-btn{padding:10px 18px;border-radius:10px;border:2px solid var(--border);background:transparent;font-family:'Nunito',sans-serif;font-weight:700;font-size:14px;cursor:pointer;color:var(--text2);transition:border-color .12s,background .12s;}
.nav-btn:hover:not(:disabled){border-color:var(--blue);}
.nav-btn:disabled{opacity:.35;cursor:default;}
.btn-submit{padding:10px 22px;border-radius:10px;border:none;background:var(--text4);color:#fff;font-family:'Nunito',sans-serif;font-weight:800;font-size:14px;cursor:pointer;transition:background .15s;}
.btn-submit.ready{background:var(--green);}

/* ── RESULTS ── */
.results-hero{background:var(--surface);border-radius:20px;padding:32px 24px;text-align:center;box-shadow:var(--shadow);}
.score-ring{width:150px;height:150px;border-radius:50%;background:conic-gradient(var(--sc,#22c55e) var(--pct,0%),var(--border) 0);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;}
.score-inner{width:116px;height:116px;border-radius:50%;background:var(--surface);display:flex;flex-direction:column;align-items:center;justify-content:center;}
.score-pct{font-family:'Nunito',sans-serif;font-size:36px;font-weight:800;}
.score-sub-lbl{font-size:12px;color:var(--text3);font-weight:600;}
.verdict{font-family:'Nunito',sans-serif;font-size:22px;font-weight:800;margin-bottom:5px;}
.verdict.pass{color:#16a34a;}
.verdict.fail{color:var(--red);}
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px;}
.stat-box{background:var(--surface2);border-radius:12px;padding:12px;}
.stat-val{font-family:'Nunito',sans-serif;font-size:22px;font-weight:800;color:var(--text1);}
.stat-lbl{font-size:11px;color:var(--text4);font-weight:600;margin-top:2px;}
.review-controls{background:var(--surface);border-radius:14px;padding:13px 18px;display:flex;gap:8px;align-items:center;flex-wrap:wrap;box-shadow:var(--shadow-sm);}
.review-controls select{flex:1;min-width:150px;padding:9px 12px;border:2px solid var(--border);border-radius:10px;font-family:'Nunito Sans',sans-serif;font-size:14px;font-weight:600;color:var(--text1);background:var(--surface);outline:none;}
.btn-action{padding:9px 16px;border-radius:10px;border:none;font-family:'Nunito',sans-serif;font-weight:800;font-size:13px;cursor:pointer;white-space:nowrap;}
.btn-blue{background:var(--blue);color:#fff;}
.btn-gray{background:var(--surface2);color:var(--text2);border:1.5px solid var(--border);}
.btn-gray:hover{border-color:var(--blue);}

/* ── REVIEW CARD ── */
.review-card{background:var(--surface);border-radius:14px;padding:22px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:14px;}
.rv-qnum{font-size:12px;font-weight:700;color:var(--text4);}
.rv-qtext{font-family:'Nunito',sans-serif;font-size:15px;font-weight:700;line-height:1.6;color:var(--text1);white-space:pre-wrap;}
.rv-opts{display:flex;flex-direction:column;gap:7px;}
.rv-opt{padding:11px 14px;border-radius:10px;border:2px solid var(--border);font-size:13px;font-weight:600;line-height:1.45;display:flex;gap:10px;align-items:flex-start;color:var(--text1);}
.rv-opt.correct{border-color:#22c55e;background:var(--green-bg);color:var(--green-text);}
.rv-opt.wrong{border-color:var(--red);background:var(--red-bg);color:var(--red-text);}
.rv-icon{flex-shrink:0;width:18px;font-size:13px;margin-top:1px;}
.rv-letter{font-weight:800;margin-right:4px;}
.rv-exp-block{background:var(--purple-bg);border-left:4px solid var(--purple);border-radius:0 12px 12px 0;padding:14px 16px;display:flex;flex-direction:column;gap:6px;}
.rv-exp-title{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.07em;color:var(--purple);}
.rv-exp-text{font-size:13px;color:var(--text2);line-height:1.7;white-space:pre-wrap;}
.rv-why-block{background:var(--amber-bg);border-left:4px solid #f59e0b;border-radius:0 12px 12px 0;padding:14px 16px;display:flex;flex-direction:column;gap:6px;}
.rv-why-title{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.07em;color:var(--amber-text);}
.rv-why-text{font-size:13px;color:var(--text2);line-height:1.7;white-space:pre-wrap;}
.review-nav-row{display:flex;justify-content:space-between;align-items:center;gap:10px;}

/* ── MODAL ── */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);display:none;align-items:center;justify-content:center;z-index:100;padding:20px;}
.modal-overlay.open{display:flex;}
.modal{background:var(--surface);border-radius:20px;padding:28px 24px;max-width:420px;width:100%;text-align:center;box-shadow:0 8px 40px rgba(0,0,0,.25);}
.modal h2{font-family:'Nunito',sans-serif;font-size:19px;font-weight:800;margin-bottom:8px;color:var(--text1);}
.modal p{font-size:14px;color:var(--text3);line-height:1.6;margin-bottom:20px;}
.modal-btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;}
.modal-btns button{padding:11px 20px;border-radius:10px;border:none;font-family:'Nunito',sans-serif;font-weight:800;font-size:14px;cursor:pointer;}

/* ── REGISTRATION MODAL ── */
.reg-modal-overlay{
  position:fixed;inset:0;
  background:rgba(0,0,0,.65);
  display:none;align-items:center;justify-content:center;
  z-index:200;padding:20px;
  backdrop-filter:blur(3px);
}
.reg-modal-overlay.open{display:flex;}
.reg-modal{
  background:var(--surface);
  border-radius:24px;
  padding:36px 32px 32px;
  max-width:440px;width:100%;
  text-align:center;
  box-shadow:0 12px 60px rgba(0,0,0,.3);
  position:relative;
}
.reg-modal-icon{
  width:64px;height:64px;border-radius:50%;
  background:linear-gradient(135deg,#1cb0f6,#7c3aed);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 20px;font-size:28px;
}
.reg-modal h2{
  font-family:'Nunito',sans-serif;font-size:21px;font-weight:800;
  color:var(--text1);margin-bottom:8px;line-height:1.3;
}
.reg-modal .reg-sub{
  font-size:14px;color:var(--text3);line-height:1.6;margin-bottom:24px;
}
.reg-field{
  display:flex;flex-direction:column;gap:6px;
  text-align:left;margin-bottom:14px;
}
.reg-field label{
  font-family:'Nunito',sans-serif;font-size:12px;font-weight:800;
  text-transform:uppercase;letter-spacing:.07em;color:var(--text3);
}
.reg-field input{
  padding:12px 14px;
  border:2px solid var(--border);
  border-radius:12px;
  background:var(--surface2);
  color:var(--text1);
  font-family:'Nunito Sans',sans-serif;
  font-size:15px;
  outline:none;
  transition:border-color .15s;
}
.reg-field input:focus{border-color:var(--blue);}
.reg-field input.error{border-color:var(--red);}
.reg-field select{
  padding:12px 14px;
  border:2px solid var(--border);
  border-radius:12px;
  background:var(--surface2);
  color:var(--text1);
  font-family:'Nunito Sans',sans-serif;
  font-size:15px;
  outline:none;
  cursor:pointer;
  appearance:none;-webkit-appearance:none;-moz-appearance:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' d='M1 1l5 5 5-5'/></svg>");
  background-repeat:no-repeat;
  background-position:right 14px center;
  padding-right:38px;
}
.reg-field select:focus{border-color:var(--blue);}
.reg-field select.error{border-color:var(--red);}
.reg-modal{max-height:90vh;overflow-y:auto;}
.reg-error-msg{
  font-size:12px;color:var(--red);
  margin-top:-8px;margin-bottom:4px;
  text-align:left;display:none;
}
.reg-error-msg.visible{display:block;}
.reg-submit-btn{
  width:100%;padding:14px;
  border:none;border-radius:14px;
  background:linear-gradient(135deg,#1cb0f6,#7c3aed);
  color:#fff;
  font-family:'Nunito',sans-serif;font-weight:800;font-size:16px;
  cursor:pointer;margin-top:8px;
  transition:opacity .15s,transform .12s;
  box-shadow:0 4px 18px rgba(28,176,246,.35);
}
.reg-submit-btn:hover{opacity:.92;transform:translateY(-1px);}
.reg-submit-btn:active{transform:translateY(0);}
.reg-submit-btn:disabled{opacity:.6;cursor:not-allowed;transform:none;}
.reg-privacy{
  font-size:11px;color:var(--text4);margin-top:14px;line-height:1.5;
}
.reg-userid-box{
  background:var(--surface2);
  border:1.5px dashed var(--border);
  border-radius:14px;
  padding:14px 16px;
  margin:4px 0 22px;
  text-align:center;
}
.reg-userid-label{
  font-size:11px;color:var(--text4);text-transform:uppercase;
  letter-spacing:.6px;font-weight:700;margin-bottom:6px;
}
.reg-userid-value{
  font-family:'Nunito',monospace,sans-serif;
  font-size:18px;font-weight:800;color:var(--text1);
  letter-spacing:.4px;word-break:break-all;
  user-select:all;
}
.reg-userid-copy{
  margin-top:10px;
  background:transparent;border:1px solid var(--border);
  color:var(--text2);
  font-size:12px;font-weight:700;
  padding:6px 14px;border-radius:10px;
  cursor:pointer;
  transition:background .15s,color .15s;
}
.reg-userid-copy:hover{background:var(--surface);color:var(--text1);}

/* ── GLOSSARY MINI TILES ── */
.hub-mini-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:4px;}
.hub-mini-tile{background:var(--surface);border-radius:12px;padding:14px 16px;text-align:center;cursor:pointer;border:2px solid var(--border);transition:border-color .15s,box-shadow .15s,transform .12s;box-shadow:var(--shadow-sm);}
.hub-mini-tile:hover{border-color:var(--blue);box-shadow:0 4px 16px rgba(28,176,246,.15);transform:translateY(-2px);}
.hub-mini-tile.inactive{opacity:.55;}
.hub-mini-tile.inactive:hover{border-color:var(--text4);box-shadow:none;transform:none;}
.hub-mini-tile-name{font-family:'Nunito',sans-serif;font-size:13px;font-weight:800;color:var(--text1);}
.hub-mini-tile-badge{display:inline-block;margin-top:5px;padding:2px 8px;border-radius:99px;font-size:10px;font-weight:700;}
.hub-section-label{font-family:'Nunito',sans-serif;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--text4);}

/* ── GLOSSARY GAME ── */
.gloss-header{background:var(--surface);border-radius:16px;padding:14px 18px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow-sm);}
.gloss-round-badge{font-family:'Nunito',sans-serif;font-size:13px;font-weight:800;color:var(--blue);background:var(--blue-bg);padding:4px 12px;border-radius:99px;}
.gloss-board{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.gloss-col-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--text4);margin-bottom:6px;}
.gloss-terms{display:flex;flex-direction:column;gap:8px;}
.gloss-defs{display:flex;flex-direction:column;gap:8px;}
.gloss-term{background:var(--surface);border:2px solid var(--border);border-radius:10px;padding:12px 14px;font-family:'Nunito',sans-serif;font-size:15px;font-weight:800;color:var(--text1);cursor:grab;user-select:none;transition:border-color .15s,background .15s;display:flex;align-items:center;justify-content:center;text-align:center;line-height:1.35;box-sizing:border-box;}
.gloss-term:active{cursor:grabbing;}
.gloss-term.dragging{opacity:.4;border-color:var(--blue);}
.gloss-term.drag-over-term{border-color:var(--blue);box-shadow:0 0 0 3px rgba(28,176,246,.2);}
.gloss-term.matched-correct{border-color:#22c55e;background:var(--green-bg);color:var(--green-text);cursor:default;}
.gloss-term.matched-wrong{border-color:var(--red);background:var(--red-bg);color:var(--red-text);}
.gloss-def{background:var(--surface2);border:2px solid var(--border);border-radius:10px;padding:12px 14px;font-size:12px;color:var(--text2);line-height:1.5;display:flex;align-items:center;justify-content:center;text-align:center;transition:border-color .15s,background .15s;box-sizing:border-box;}
.gloss-def.drag-over{border-color:var(--blue);box-shadow:0 0 0 3px rgba(28,176,246,.2);background:var(--blue-bg);}
.gloss-def.matched-correct{border-color:#22c55e;background:var(--green-bg);}
.gloss-def.matched-wrong{border-color:var(--red);background:var(--red-bg);}
.gloss-footer{background:var(--surface);border-radius:14px;padding:13px 18px;display:flex;gap:10px;justify-content:flex-end;align-items:center;box-shadow:var(--shadow-sm);}

/* ── KNOWLEDGE BLITZ ── */
.blitz-screen{display:flex;flex-direction:column;gap:16px;}
.blitz-header{background:var(--surface);border-radius:16px;padding:14px 18px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow-sm);}
.blitz-q-card{background:var(--surface);border-radius:16px;padding:28px 24px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:20px;min-height:200px;}
.blitz-q-num{font-size:12px;font-weight:700;color:var(--text4);text-transform:uppercase;letter-spacing:.07em;}
.blitz-q-text{font-family:'Nunito',sans-serif;font-size:18px;font-weight:800;line-height:1.6;color:var(--text1);flex:1;}
.blitz-tf-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.blitz-tf-btn{padding:16px;border-radius:14px;border:2.5px solid var(--border);background:var(--surface);font-family:'Nunito',sans-serif;font-size:17px;font-weight:800;cursor:pointer;transition:border-color .12s,background .12s,transform .1s;color:var(--text1);}
.blitz-tf-btn:hover{transform:translateY(-1px);}
.blitz-tf-btn.true-btn:hover{border-color:var(--green);background:var(--green-bg);}
.blitz-tf-btn.false-btn:hover{border-color:var(--red);background:var(--red-bg);}
.blitz-tf-btn.correct{border-color:var(--green);background:var(--green-bg);color:var(--green-text);}
.blitz-tf-btn.wrong{border-color:var(--red);background:var(--red-bg);color:var(--red-text);}
.blitz-tf-btn.reveal-correct{border-color:var(--green);background:var(--green-bg);color:var(--green-text);}
.blitz-tf-btn:disabled{cursor:default;transform:none;}
.blitz-feedback{font-family:'Nunito',sans-serif;font-size:14px;font-weight:700;text-align:center;min-height:22px;}
.blitz-feedback.correct-fb{color:var(--green-text);}
.blitz-feedback.wrong-fb{color:var(--red-text);}
.blitz-results-hero{background:var(--surface);border-radius:20px;padding:40px 24px;text-align:center;box-shadow:var(--shadow);}
.blitz-final-pct{font-family:'Nunito',sans-serif;font-size:64px;font-weight:800;line-height:1;}
.blitz-final-pct.pass{color:var(--green-text);}
.blitz-final-pct.fail{color:var(--red);}
.blitz-final-detail{font-size:14px;color:var(--text3);margin-top:10px;line-height:1.6;}

.gloss-results-hero{background:var(--surface);border-radius:20px;padding:40px 24px;text-align:center;box-shadow:var(--shadow);}
.gloss-final-pct{font-family:'Nunito',sans-serif;font-size:64px;font-weight:800;color:var(--blue);line-height:1;}
.gloss-final-detail{font-size:14px;color:var(--text3);margin-top:10px;line-height:1.6;}

/* ── GLOSSARY DROPDOWN MODE (mobile-friendly) ── */
#gloss-drag-ui{display:block;}
#gloss-dd-ui{display:none;}
.gloss-dd-list{display:flex;flex-direction:column;gap:10px;}
.gloss-dd-card{
  background:var(--surface);
  border:2px solid var(--border);
  border-radius:12px;
  padding:14px 16px;
  display:flex;flex-direction:column;gap:10px;
  box-shadow:var(--shadow-sm);
  transition:border-color .15s,background .15s;
}
.gloss-dd-card.matched-correct{border-color:#22c55e;background:var(--green-bg);}
.gloss-dd-card.matched-correct .gloss-dd-def{color:var(--green-text);}
.gloss-dd-card.matched-wrong{border-color:var(--red);background:var(--red-bg);}
.gloss-dd-def{font-size:13px;color:var(--text2);line-height:1.5;}
.gloss-dd-card.matched-correct .gloss-dd-pick{
  background:transparent;border:none;padding:0;
  font-family:'Nunito',sans-serif;font-size:15px;font-weight:800;color:var(--green-text);
}
.gloss-dd-pick{
  width:100%;
  padding:11px 12px;
  border:2px solid var(--border);
  border-radius:10px;
  background:var(--surface2);
  color:var(--text1);
  font-family:'Nunito',sans-serif;font-size:14px;font-weight:700;
  outline:none;
  cursor:pointer;
  appearance:none;
  -webkit-appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,var(--text3) 50%),linear-gradient(135deg,var(--text3) 50%,transparent 50%);
  background-position:calc(100% - 18px) center,calc(100% - 13px) center;
  background-size:5px 5px,5px 5px;
  background-repeat:no-repeat;
  padding-right:36px;
}
.gloss-dd-pick:focus{border-color:var(--blue);}

/* ── MOBILE (< 600px) ── */
@media (max-width: 600px) {
  body{padding:16px 12px 60px;}
  .hub-hero{padding:28px 20px 24px;}
  .hub-title{font-size:22px;}
  .hub-sub{font-size:14px;}
  .hub-grid{grid-template-columns:1fr;gap:10px;}
  .hub-tile{
    padding:14px 44px 14px 18px;
    text-align:left;
    position:relative;
    border-width:1.5px;
    border-radius:14px;
  }
  .hub-tile-label{margin-bottom:2px;}
  .hub-tile-name{font-size:17px;}
  .hub-tile-desc{margin-top:2px;font-size:12px;}
  .hub-tile-badge{margin-top:6px;}
  .hub-tile::after{
    content:"›";
    position:absolute;
    right:16px;top:50%;
    transform:translateY(-50%);
    font-size:28px;line-height:1;
    color:var(--text4);font-weight:400;
  }
  .hub-mini-row{grid-template-columns:1fr;gap:8px;}
  .hub-mini-tile{
    padding:12px 40px 12px 16px;
    text-align:left;
    position:relative;
    border-width:1.5px;
    border-radius:12px;
    display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  }
  .hub-mini-tile-name{font-size:13px;}
  .hub-mini-tile-badge{margin-top:0;font-size:10px;white-space:nowrap;}
  .hub-mini-tile::after{
    content:"›";
    position:absolute;
    right:14px;top:50%;
    transform:translateY(-50%);
    font-size:24px;line-height:1;
    color:var(--text4);font-weight:400;
  }
  .pack-grid{grid-template-columns:1fr;}
  .pack-card{padding:22px 16px;}
  .info-cards{gap:8px;}
  .info-card{padding:12px 8px;}
  .info-card .val{font-size:17px;}
  .info-card .lbl{font-size:11px;}
  .stats-row{gap:8px;}
  .exam-body{grid-template-columns:1fr;}
  .q-nav{position:static;}
  .q-nav-grid{grid-template-columns:repeat(8,1fr);}
  .exam-header,.gloss-header,.blitz-header,.page-header{flex-wrap:wrap;row-gap:8px;}
  .exam-title{font-size:13px;flex:0 0 100%;order:1;}
  .gloss-header .page-header-title,
  .blitz-header .page-header-title,
  .page-header .page-header-title{flex:0 0 100%;order:1;font-size:15px;}
  .review-controls{flex-direction:column;align-items:stretch;}
  .review-controls select{flex:none;width:100%;}
  .btn-action{width:100%;}
  .results-hero{padding:24px 16px;}
  .review-card{padding:18px;}
  .blitz-q-card{padding:22px 18px;}
  .blitz-q-text{font-size:16px;}
  #gloss-drag-ui{display:none;}
  #gloss-dd-ui{display:block;}
  #theme-toggle{width:38px;height:38px;font-size:18px;}
  #profile-btn{right:60px;width:38px;height:38px;font-size:13px;}
  .reg-modal{padding:28px 22px 24px;}
  .reg-modal h2{font-size:18px;}
  .attempt-item{padding:12px 14px;}
  .attempt-pct{font-size:18px;}
}

/* ── BOTTOM ACTIONS ON RESULTS ── */
.results-bottom-actions{
  display:flex;justify-content:center;margin-top:8px;
}
.results-bottom-actions .btn-action{min-width:200px;}

.results-actions-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:10px;margin-top:6px;
}
.results-actions-grid .btn-action{width:100%;}

/* ── PRINT AREA (hidden on screen) ── */
#print-area{display:none;}

/* ── PRINT STYLES ── */
@media print {
  body{background:#fff !important;color:#000 !important;padding:0 !important;display:block !important;}
  #app, #theme-toggle, #profile-btn, .modal-overlay, .reg-modal-overlay{display:none !important;}
  #print-area{display:block !important;}

  .pdf-page{font-family:'Nunito Sans',sans-serif;color:#000;font-size:11pt;line-height:1.45;}
  .pdf-header{border-bottom:2px solid #000;padding-bottom:8px;margin-bottom:14px;}
  .pdf-title{font-family:'Nunito',sans-serif;font-size:18pt;font-weight:800;}
  .pdf-sub{font-size:10pt;color:#444;margin-top:3px;}

  .pdf-user{font-size:10pt;margin-bottom:14px;line-height:1.6;}
  .pdf-user b{font-weight:700;}

  .pdf-score-row{display:flex;align-items:center;gap:18px;border:1.5px solid #000;border-radius:8px;padding:12px 16px;margin-bottom:18px;page-break-inside:avoid;}
  .pdf-score-pct{font-family:'Nunito',sans-serif;font-size:32pt;font-weight:800;line-height:1;}
  .pdf-score-pct.pass{color:#16a34a;}
  .pdf-score-pct.fail{color:#dc2626;}
  .pdf-verdict{font-weight:800;font-size:13pt;letter-spacing:.06em;margin-bottom:2px;}
  .pdf-verdict.pass{color:#16a34a;}
  .pdf-verdict.fail{color:#dc2626;}
  .pdf-score-meta{font-size:10pt;}

  .pdf-q{border:1px solid #ccc;border-radius:6px;padding:10px 12px;margin-bottom:10px;page-break-inside:avoid;}
  .pdf-q.correct{border-left:4px solid #16a34a;}
  .pdf-q.wrong{border-left:4px solid #dc2626;}
  .pdf-q.unanswered{border-left:4px solid #f59e0b;}
  .pdf-q-head{display:flex;justify-content:space-between;font-size:9pt;font-weight:700;margin-bottom:6px;}
  .pdf-q-num{color:#666;}
  .pdf-q-status.correct{color:#16a34a;}
  .pdf-q-status.wrong{color:#dc2626;}
  .pdf-q-status.unanswered{color:#f59e0b;}
  .pdf-q-text{font-weight:600;margin-bottom:8px;}
  .pdf-opts{margin-bottom:8px;}
  .pdf-opt{padding:3px 8px;margin-bottom:2px;font-size:10pt;display:flex;gap:6px;}
  .pdf-opt-mark{display:inline-block;width:14px;font-weight:700;}
  .pdf-opt.correct{background:#e8f5e9;border-radius:4px;}
  .pdf-opt.correct .pdf-opt-mark{color:#16a34a;}
  .pdf-opt.selected-wrong{background:#fdecec;border-radius:4px;}
  .pdf-opt.selected-wrong .pdf-opt-mark{color:#dc2626;}
  .pdf-exp{font-size:10pt;background:#f4f6f8;border-radius:4px;padding:8px 10px;margin-top:6px;}
  .pdf-exp-title{font-weight:700;font-size:9pt;text-transform:uppercase;letter-spacing:.06em;color:#555;margin-bottom:3px;}

  .pdf-footer{font-size:8pt;color:#888;text-align:center;margin-top:12px;border-top:1px solid #ccc;padding-top:6px;}

  @page{margin:14mm 12mm;}
}

/* ── BLITZ / GLOSSARY REVIEW ── */
.rv-meta{
  font-size:13px;color:var(--text3);
  background:var(--surface);border-radius:12px;
  padding:10px 14px;box-shadow:var(--shadow-sm);
}
.rv-summary{
  display:flex;gap:18px;flex-wrap:wrap;
  background:var(--surface);border-radius:12px;
  padding:12px 16px;box-shadow:var(--shadow-sm);
  font-size:13px;color:var(--text2);
  margin-bottom:8px;
}
.rv-summary b{color:var(--text1);font-size:15px;font-weight:800;}
#blitz-review-list, #gloss-review-list{
  display:flex;flex-direction:column;gap:8px;
}
.rv-item{
  background:var(--surface);
  border:1.5px solid var(--border);
  border-left:4px solid var(--border2);
  border-radius:12px;padding:12px 16px;
  box-shadow:var(--shadow-sm);
}
.rv-item.correct{border-left-color:#16a34a;}
.rv-item.wrong{border-left-color:var(--red);}
.rv-item.retried{border-left-color:#f59e0b;}
.rv-item-head{
  display:flex;justify-content:space-between;align-items:center;
  font-size:11px;font-weight:800;letter-spacing:.05em;
  color:var(--text3);margin-bottom:6px;
}
.rv-item-num{text-transform:uppercase;}
.rv-item-status.correct{color:#16a34a;}
.rv-item-status.wrong{color:var(--red);}
.rv-item-status.retried{color:#d97706;}
.rv-item-q{
  font-family:'Nunito',sans-serif;font-size:14px;font-weight:700;
  color:var(--text1);margin-bottom:6px;line-height:1.45;
}
.rv-item-ans{
  font-size:13px;color:var(--text2);line-height:1.55;
}
.rv-item-ans b{color:var(--text1);font-weight:700;}

.gloss-rv-tabs{
  display:flex;flex-wrap:wrap;gap:8px;
}
.gloss-rv-tab{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:10px;
  border:1.5px solid var(--border2);
  background:var(--surface);
  color:var(--text2);
  font-family:'Nunito',sans-serif;font-size:13px;font-weight:700;
  cursor:pointer;
  transition:border-color .12s,background .12s,color .12s;
}
.gloss-rv-tab:hover{border-color:var(--blue);color:var(--text1);}
.gloss-rv-tab.active{
  border-color:var(--blue);background:var(--blue-bg);color:var(--blue-dark);
}
.gloss-rv-dot{
  width:8px;height:8px;border-radius:50%;display:inline-block;
}
.gloss-rv-dot.clean{background:#16a34a;}
.gloss-rv-dot.retry{background:#f59e0b;}