/* ─────────────────────────────────────────────
   DESIGN: Academic Light — clean institutional
   whites + warm slate, deep teal accent, Lora
   display headings paired with Nunito body.
   Feels like a well-designed university portal.
───────────────────────────────────────────── */
:root {
  --bg:        #F5F6F8;
  --surface:   #FFFFFF;
  --surface2:  #F0F2F5;
  --border:    #DDE1E8;
  --border2:   #C8CDD8;

  --teal:      #0F7EA3;
  --teal-dark: #0A607E;
  --teal-pale: #E6F4F9;
  --teal-mid:  rgba(15,126,163,0.12);

  --text-h:    #1A2130;
  --text-1:    #2D3748;
  --text-2:    #5A6A80;
  --text-3:    #8A96A8;
  --text-inv:  #FFFFFF;

  --green:     #0D9E6A;
  --green-pale:#E6F7F2;
  --red:       #D94040;
  --red-pale:  #FDEAEA;
  --amber:     #D97706;
  --amber-pale:#FEF3CD;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 16px 40px rgba(0,0,0,.12), 0 4px 8px rgba(0,0,0,.06);

  --radius:    10px;
  --radius-sm: 7px;
  --radius-lg: 14px;

  --font-head: 'Lora', Georgia, serif;
  --font-body: 'Nunito', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --sidebar-w: 288px;
  --panel-w:   380px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text-1);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ── APP SHELL ── */
.app {
  display: grid;
  grid-template-rows: 56px 1fr;
  grid-template-columns: var(--sidebar-w) 1fr var(--panel-w);
  height: 100vh;
  overflow: hidden;
}

/* ── TOPBAR ── */
.topbar {
  grid-column: 1/-1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  overflow-x: auto;
  scrollbar-width: none;
  background: var(--surface);
  border-bottom: 1.5px solid var(--border);
  box-shadow: var(--shadow-sm);
  z-index: 100;
}
.topbar::-webkit-scrollbar { display: none; }

.logo-lockup {
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
}
.logo-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: #fff;
  border: 1px solid var(--border);
  position: relative;
}
.logo-icon img {
  position: absolute;
  width: 176px;
  height: auto;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  display: block;
}
.logo-text {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-h);
  white-space: nowrap;
}
.logo-text sup {
  font-family: var(--font-body);
  font-size: 8px;
  color: var(--teal);
  vertical-align: super;
}
.topbar-divider {
  width: 1px; height: 22px;
  background: var(--border);
  margin: 0 4px;
}
.topbar-subtitle {
  font-size: 12px;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: 0.4px;
  text-transform: uppercase;
}
.topbar-spacer { flex: 1; }

/* Autosave pill */
.autosave-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 20px;
  background: var(--surface2);
  border: 1px solid var(--border);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-3);
  font-family: var(--font-mono);
  transition: all .3s;
  white-space: nowrap;
}
.autosave-pill.saving { color: var(--amber); border-color: var(--amber); background: var(--amber-pale); }
.autosave-pill.saved  { color: var(--green); border-color: var(--green); background: var(--green-pale); }
.as-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--border2);
  transition: background .3s;
}
.autosave-pill.saving .as-dot { background: var(--amber); animation: blink 1s infinite; }
.autosave-pill.saved  .as-dot { background: var(--green); }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.2} }

/* Topbar buttons */
.tb-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: all .18s;
  white-space: nowrap;
  text-decoration: none;
}
.tb-btn-ghost {
  background: transparent;
  color: var(--text-2);
  border-color: var(--border);
}
.tb-btn-ghost:hover { background: var(--surface2); color: var(--text-1); border-color: var(--border2); }
.tb-btn-teal  { background: var(--teal); color: #fff; border-color: var(--teal); }
.tb-btn-teal:hover { background: var(--teal-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(15,126,163,.3); }
.tb-btn-green { background: var(--green); color: #fff; }
.tb-btn-green:hover { filter: brightness(1.08); transform: translateY(-1px); }

/* ── SIDEBAR ── */
.sidebar {
  background: var(--surface);
  border-right: 1.5px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.sidebar-top {
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--border);
}
.sidebar-hdr {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.sidebar-label {
  font-size: 10.5px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-3);
}
.q-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  padding: 2px 9px;
  background: var(--teal-pale);
  color: var(--teal);
  border: 1px solid rgba(15,126,163,.2);
  border-radius: 12px;
}

/* Completion bar */
.comp-bar-row {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-3);
  margin-bottom: 5px;
}
.comp-bar {
  height: 4px;
  background: var(--surface2);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 10px;
}
.comp-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--teal) 0%, #3BB8D8 100%);
  border-radius: 2px;
  transition: width .4s ease;
}

/* Search */
.search-wrap { position: relative; }
.search-wrap svg {
  position: absolute;
  left: 9px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-3);
  pointer-events: none;
}
.search-input {
  width: 100%;
  background: var(--surface2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px 7px 30px;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--text-1);
  outline: none;
  transition: border-color .2s;
}
.search-input:focus { border-color: var(--teal); background: var(--surface); }
.search-input::placeholder { color: var(--text-3); }

/* Q List */
.q-list { flex: 1; overflow-y: auto; padding: 8px; }
.q-item {
  padding: 10px 11px;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  margin-bottom: 3px;
  transition: all .14s;
  position: relative;
}
.q-item:hover { background: var(--surface2); border-color: var(--border); }
.q-item.active { background: var(--teal-pale); border-color: rgba(15,126,163,.3); }
.q-item.is-ok  { border-left: 3px solid var(--green); }
.q-item.is-err { border-left: 3px solid var(--red); }
.qi-top { display: flex; align-items: center; justify-content: space-between; }
.qi-id {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--teal);
  background: var(--teal-pale);
  padding: 1px 6px;
  border-radius: 4px;
}
.q-item.is-err .qi-id { color: var(--red); background: var(--red-pale); }
.qi-del {
  display: none;
  align-items: center;
  justify-content: center;
  width: 18px; height: 18px;
  border: none; background: none;
  color: var(--text-3); cursor: pointer;
  border-radius: 4px; font-size: 12px;
}
.q-item:hover .qi-del { display: flex; }
.qi-del:hover { background: var(--red-pale); color: var(--red); }
.qi-text {
  font-size: 12px;
  color: var(--text-2);
  line-height: 1.4;
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.qi-foot {
  display: flex; gap: 5px; margin-top: 5px; align-items: center;
}
.tag-ok   { font-size: 10px; font-weight: 700; color: var(--green); background: var(--green-pale); padding: 1px 7px; border-radius: 4px; }
.tag-err  { font-size: 10px; font-weight: 700; color: var(--red); background: var(--red-pale); padding: 1px 7px; border-radius: 4px; }
.tag-warn { font-size: 10px; font-weight: 700; color: var(--amber); background: var(--amber-pale); padding: 1px 7px; border-radius: 4px; }

.sidebar-foot {
  padding: 10px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.btn-add-q {
  display: flex; align-items: center; justify-content: center; gap: 7px;
  width: 100%;
  padding: 9px;
  background: var(--teal-pale);
  border: 1.5px dashed rgba(15,126,163,.4);
  border-radius: var(--radius-sm);
  color: var(--teal);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all .18s;
}
.btn-add-q:hover { background: var(--teal-mid); border-style: solid; }

/* ── MAIN EDITOR ── */
.main-editor {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}
.main-scroll { flex: 1; overflow-y: auto; padding: 28px 32px 40px; }

/* Empty state */
.empty-state {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  height: 100%; gap: 12px; text-align: center;
  color: var(--text-3);
}
.empty-icon {
  width: 72px; height: 72px;
  background: var(--surface);
  border: 2px dashed var(--border2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  margin-bottom: 4px;
}
.empty-state h3 { font-family: var(--font-head); font-size: 18px; color: var(--text-2); font-weight: 500; }

/* Editor card */
.editor-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 26px 28px;
  margin-bottom: 14px;
  transition: box-shadow .2s;
}
.editor-card:focus-within { box-shadow: var(--shadow-md), 0 0 0 3px rgba(15,126,163,.1); }

.card-hdr {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.card-hdr-icon {
  width: 32px; height: 32px;
  background: var(--teal-pale);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
}
.card-hdr-title {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-h);
}
.card-hdr-sub {
  font-size: 11.5px;
  color: var(--text-3);
  margin-top: 1px;
}

/* Q nav */
.q-nav-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.q-id-chip {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--teal);
  background: var(--teal-pale);
  border: 1px solid rgba(15,126,163,.25);
  padding: 5px 14px;
  border-radius: var(--radius-sm);
}
.nav-btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 12px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  transition: all .15s;
}
.nav-btn:hover:not(:disabled) { border-color: var(--teal); color: var(--teal); }
.nav-btn:disabled { opacity: .35; cursor: not-allowed; }
.btn-del-q {
  margin-left: auto;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px;
  background: transparent;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  color: var(--red);
  cursor: pointer;
  transition: all .15s;
}
.btn-del-q:hover { background: var(--red-pale); border-color: var(--red); }

/* Validation strip */
.val-strip {
  display: none;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 14px;
  background: var(--red-pale);
  border: 1px solid rgba(217,64,64,.25);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--red);
  margin-bottom: 18px;
}
.val-strip.show { display: flex; }

/* Field */
.field { margin-bottom: 16px; }
.field-lbl {
  display: flex;
  align-items: baseline;
  gap: 5px;
  font-size: 11.5px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .7px;
  color: var(--text-2);
  margin-bottom: 6px;
}
.lbl-req { color: var(--red); font-weight: 700; }
.lbl-opt { color: var(--text-3); font-weight: 500; text-transform: none; letter-spacing: 0; font-size: 11px; }
.lbl-count { margin-left: auto; font-size: 11px; color: var(--text-3); font-weight: 500; text-transform: none; letter-spacing: 0; font-family: var(--font-mono); }

textarea, .field-input {
  width: 100%;
  background: var(--surface2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 13px;
  font-family: var(--font-body);
  font-size: 13.5px;
  color: var(--text-1);
  outline: none;
  transition: border-color .18s, background .18s;
  resize: vertical;
  line-height: 1.55;
}
textarea:focus, .field-input:focus {
  border-color: var(--teal);
  background: var(--surface);
  box-shadow: 0 0 0 3px rgba(15,126,163,.08);
}
textarea::placeholder, .field-input::placeholder { color: var(--text-3); }
textarea.q-textarea { min-height: 78px; }

/* Options */
.options-list { display: flex; flex-direction: column; gap: 8px; }
.opt-row {
  display: grid;
  grid-template-columns: 40px 1fr 34px;
  gap: 7px;
  align-items: center;
}
.opt-badge {
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  background: var(--surface2);
  border: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-2);
  cursor: pointer;
  transition: all .15s;
  flex-shrink: 0;
  user-select: none;
}
.opt-badge:hover { border-color: var(--teal); color: var(--teal); }
.opt-badge.correct {
  background: var(--green-pale);
  border-color: rgba(13,158,106,.45);
  color: var(--green);
}
.opt-input {
  background: var(--surface2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font-family: var(--font-body);
  font-size: 13.5px;
  color: var(--text-1);
  outline: none;
  width: 100%;
  transition: border-color .18s, background .18s;
}
.opt-input:focus { border-color: var(--teal); background: var(--surface); }
.opt-input.is-correct { border-color: rgba(13,158,106,.45); background: rgba(13,158,106,.04); }
.opt-input::placeholder { color: var(--text-3); }
.opt-clear {
  width: 30px; height: 30px;
  background: none; border: none;
  color: var(--text-3); cursor: pointer;
  border-radius: 6px; font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  transition: all .15s;
}
.opt-clear:hover { background: var(--red-pale); color: var(--red); }

.opt-hint {
  display: flex; align-items: center; gap: 5px;
  font-size: 11.5px; color: var(--text-3); margin-top: 5px;
}
.hint-key {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 600;
  padding: 1px 6px; color: var(--text-2);
}

/* ── RIGHT PANEL ── */
.right-panel {
  background: var(--surface);
  border-left: 1.5px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden;
}

.tabs-row {
  display: flex;
  border-bottom: 1.5px solid var(--border);
}
.panel-tab {
  flex: 1; padding: 13px 6px;
  font-size: 11.5px; font-weight: 800;
  letter-spacing: .5px; text-transform: uppercase;
  text-align: center; cursor: pointer;
  color: var(--text-3);
  border-bottom: 2.5px solid transparent;
  transition: all .18s;
}
.panel-tab.active { color: var(--teal); border-bottom-color: var(--teal); }
.panel-tab:hover:not(.active) { color: var(--text-2); background: var(--surface2); }

.panel-body { flex: 1; overflow-y: auto; }

/* ── METADATA FORM ── */
.meta-section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.meta-sec-title {
  display: flex; align-items: center; gap: 6px;
  font-size: 10.5px; font-weight: 800;
  text-transform: uppercase; letter-spacing: .8px;
  color: var(--teal);
  margin-bottom: 12px;
}
.meta-field { margin-bottom: 10px; }
.meta-lbl {
  font-size: 11px; font-weight: 700;
  color: var(--text-2); margin-bottom: 4px;
  display: flex; align-items: center; gap: 4px;
}
.meta-lbl .req { color: var(--red); }
.meta-input {
  width: 100%;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--text-1);
  outline: none;
  transition: border-color .18s;
}
.meta-input:focus { border-color: var(--teal); background: var(--surface); }
.meta-input::placeholder { color: var(--text-3); }
.meta-input[type="number"] { -moz-appearance: textfield; }
.meta-input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }
select.meta-input { cursor: pointer; }
.meta-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

/* Toggles */
.toggle-group { display: flex; flex-direction: column; gap: 6px; }
.toggle-item {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 8px 11px;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color .18s;
}
.toggle-item:hover { border-color: var(--teal); }
.toggle-lbl { font-size: 12.5px; font-weight: 600; color: var(--text-1); }
.toggle-sw { position: relative; width: 36px; height: 20px; flex-shrink: 0; }
.toggle-sw input { opacity: 0; width: 0; height: 0; }
.sw-track {
  position: absolute; inset: 0;
  background: var(--border2);
  border-radius: 10px;
  transition: .2s;
  cursor: pointer;
}
.sw-track::before {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  left: 3px; top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: .2s;
  box-shadow: 0 1px 3px rgba(0,0,0,.2);
}
input:checked ~ .sw-track { background: var(--teal); }
input:checked ~ .sw-track::before { transform: translateX(16px); }

/* ── PREVIEW ── */
.preview-body { padding: 14px; }
.prev-card {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.prev-id {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--teal); background: var(--teal-pale);
  display: inline-block; padding: 2px 8px;
  border-radius: 4px; margin-bottom: 10px;
}
.prev-q { font-size: 13px; line-height: 1.65; color: var(--text-h); margin-bottom: 12px; font-weight: 500; }
.prev-opt {
  display: flex; align-items: flex-start; gap: 9px;
  padding: 7px 10px; border-radius: 7px;
  border: 1.5px solid var(--border);
  margin-bottom: 5px; transition: all .15s;
}
.prev-opt.correct { background: var(--green-pale); border-color: rgba(13,158,106,.3); }
.prev-opt-ltr { font-family: var(--font-mono); font-size: 11px; font-weight: 700; color: var(--text-3); width: 16px; flex-shrink: 0; padding-top: 1px; }
.prev-opt.correct .prev-opt-ltr { color: var(--green); }
.prev-opt-txt { font-size: 12px; color: var(--text-2); line-height: 1.5; }
.prev-opt.correct .prev-opt-txt { color: var(--text-1); }
.prev-expl {
  margin-top: 10px; padding: 9px 12px;
  background: #EEF4FB;
  border-left: 3px solid var(--teal);
  border-radius: 0 7px 7px 0;
  font-size: 11.5px; color: var(--text-2); line-height: 1.55;
}

/* ── STATS ── */
.stats-body { padding: 14px; }
.stat-block {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 10px;
}
.stat-lbl { font-size: 10.5px; font-weight: 800; text-transform: uppercase; letter-spacing: .6px; color: var(--text-3); margin-bottom: 3px; }
.stat-val { font-family: var(--font-mono); font-size: 22px; font-weight: 500; color: var(--teal); }
.stat-sub { font-size: 11px; color: var(--text-3); margin-top: 1px; }
.stats-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.dist-bar-row { display: flex; gap: 6px; margin-top: 8px; }
.dist-col { flex: 1; text-align: center; }
.dist-num { font-family: var(--font-mono); font-size: 15px; color: var(--text-1); font-weight: 600; }
.dist-ltr { font-size: 10px; color: var(--text-3); margin-top: 1px; font-weight: 700; }

.issue-row {
  display: flex; align-items: flex-start; gap: 8px;
  padding: 8px 10px; border-radius: 7px;
  background: var(--red-pale); border: 1px solid rgba(217,64,64,.15);
  margin-bottom: 5px; cursor: pointer;
  font-size: 11.5px; color: var(--red);
  transition: background .15s;
}
.issue-row:hover { background: rgba(217,64,64,.18); }
.issue-id { font-family: var(--font-mono); flex-shrink: 0; font-weight: 700; }

/* ── EXPORT MODAL ── */
.overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(26,33,48,.55);
  backdrop-filter: blur(6px);
  z-index: 999;
  align-items: center; justify-content: center;
}
.overlay.open { display: flex; }
.modal {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  max-width: 480px; width: 92vw;
  box-shadow: var(--shadow-lg);
  animation: popIn .22s ease;
}
@keyframes popIn { from{opacity:0;transform:scale(.94) translateY(8px)} to{opacity:1;transform:none} }
.modal-title { font-family: var(--font-head); font-size: 21px; font-weight: 600; color: var(--text-h); margin-bottom: 5px; }
.modal-sub { font-size: 13px; color: var(--text-2); margin-bottom: 22px; line-height: 1.6; }
.modal-stats { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin-bottom: 20px; }
.modal-stat { background: var(--bg); border: 1.5px solid var(--border); border-radius: var(--radius-sm); padding: 12px; text-align: center; }
.modal-stat-n { font-family: var(--font-mono); font-size: 20px; color: var(--teal); font-weight: 600; }
.modal-stat-l { font-size: 10px; text-transform: uppercase; letter-spacing: .5px; color: var(--text-3); margin-top: 2px; font-weight: 700; }
.modal-issues { margin-bottom: 18px; padding: 12px 14px; background: var(--amber-pale); border: 1px solid rgba(217,119,6,.25); border-radius: var(--radius-sm); font-size: 12px; color: var(--amber); line-height: 1.8; }
.modal-issues strong { display: block; margin-bottom: 4px; font-size: 12.5px; }
.modal-footer { display: flex; gap: 10px; justify-content: flex-end; }

/* ── TOAST ── */
.toast {
  position: fixed;
  bottom: 22px; left: 50%;
  transform: translateX(-50%) translateY(70px);
  background: var(--text-h);
  color: var(--text-inv);
  padding: 9px 20px;
  border-radius: 24px;
  font-size: 13px; font-weight: 600;
  z-index: 9999;
  pointer-events: none;
  transition: transform .32s cubic-bezier(.34,1.56,.64,1);
  white-space: nowrap;
  display: flex; align-items: center; gap: 7px;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.ok   { background: var(--green); }
.toast.err  { background: var(--red); }


    /* ── PIN PROTECTION OVERLAY ─────────────────────── */
    .pin-overlay {
      position:fixed; inset:0; z-index:10000;
      background:linear-gradient(135deg,#EEF2F7 0%,#E4EAF2 100%);
      display:flex; align-items:center; justify-content:center;
      font-family:var(--font-body);
    }
    .pin-overlay.hidden { display:none; }
    .pin-card {
      background:var(--surface); border:1.5px solid var(--border);
      border-radius:18px; padding:20px 24px 18px; width:340px;
      max-width:96vw; max-height:96vh; overflow-y:auto;
      box-shadow:0 20px 50px rgba(0,0,0,.11),0 4px 10px rgba(0,0,0,.05);
      animation:pinIn .25s cubic-bezier(.34,1.4,.64,1);
    }
    @keyframes pinIn { from{opacity:0;transform:translateY(10px) scale(.97)} to{opacity:1;transform:none} }
    .pin-logo { display:flex; align-items:center; gap:10px; margin-bottom:14px; padding-bottom:12px; border-bottom:1px solid var(--border); }
    .pin-logo-img { width:40px; height:40px; border-radius:9px; overflow:hidden; border:1px solid var(--border); background:#fff; flex-shrink:0; position:relative; }
    .pin-logo-img img { position:absolute; width:158px; height:auto; top:-7px; left:50%; transform:translateX(-50%); display:block; }
    .pin-logo-title { font-family:var(--font-head); font-size:13.5px; font-weight:600; color:var(--text-h); }
    .pin-logo-sub   { font-size:10px; color:var(--text-3); margin-top:1px; }
    .pin-heading    { font-family:var(--font-head); font-size:17px; font-weight:600; color:var(--text-h); margin-bottom:2px; }
    .pin-subhead    { font-size:11.5px; color:var(--text-2); line-height:1.5; margin-bottom:12px; }
    .pin-field { margin-bottom:9px; }
    .pin-label { font-size:10px; font-weight:800; text-transform:uppercase; letter-spacing:.6px; color:var(--text-2); margin-bottom:4px; display:block; }
    .pin-input { width:100%; background:var(--surface2); border:1.5px solid var(--border); border-radius:var(--radius-sm); padding:8px 11px; font-family:var(--font-body); font-size:13px; color:var(--text-h); outline:none; transition:border-color .18s,background .18s; box-sizing:border-box; }
    .pin-input:focus { border-color:var(--teal); background:var(--surface); }
    .pin-input.error { border-color:var(--red); background:var(--red-pale); }
    .pin-input::placeholder { color:var(--text-3); }
    .pin-error-msg  { display:none; font-size:11.5px; font-weight:600; color:var(--red); background:var(--red-pale); border:1px solid rgba(217,64,64,.2); border-radius:var(--radius-sm); padding:7px 10px; margin-bottom:9px; text-align:center; }
    .pin-error-msg.show { display:block; }
    .pin-attempts   { font-size:10.5px; color:var(--amber); text-align:center; margin-bottom:7px; font-weight:600; display:none; }
    .pin-attempts.show { display:block; }
    .pin-btn { width:100%; padding:10px; background:var(--teal); color:#fff; border:none; border-radius:var(--radius-sm); font-family:var(--font-body); font-size:13px; font-weight:700; cursor:pointer; transition:all .18s; margin-top:2px; }
    .pin-btn:hover { background:var(--teal-dark); transform:translateY(-1px); }
    .pin-recover-link { display:block; text-align:center; font-size:11px; color:var(--text-3); margin-top:8px; cursor:pointer; text-decoration:underline; text-decoration-color:transparent; transition:color .15s; }
    .pin-recover-link:hover { color:var(--teal); text-decoration-color:var(--teal); }
    .pin-recovery-box { display:none; margin-top:8px; padding:10px; background:var(--amber-pale); border:1px solid rgba(217,119,6,.25); border-radius:var(--radius-sm); font-size:11.5px; color:var(--amber); line-height:1.5; }
    .pin-recovery-box.show { display:block; }
    .pin-screen { display:none; }
    .pin-screen.active { display:block; }

    
/* ── CONFIRM MODAL ─────────────────────────────── */
.confirm-overlay {
  position: fixed; inset: 0; z-index: 9000;
  background: rgba(15,20,30,.45);
  backdrop-filter: blur(3px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity .18s;
}
.confirm-overlay.show { opacity: 1; pointer-events: all; }
.confirm-box {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 16px;
  padding: 28px 28px 22px;
  width: 360px; max-width: 92vw;
  box-shadow: 0 24px 60px rgba(0,0,0,.18), 0 4px 12px rgba(0,0,0,.08);
  transform: translateY(10px) scale(.97);
  transition: transform .2s cubic-bezier(.34,1.4,.64,1);
}
.confirm-overlay.show .confirm-box { transform: none; }
.confirm-icon { font-size: 32px; margin-bottom: 10px; }
.confirm-title { font-family: var(--font-head); font-size: 16px; font-weight: 600; color: var(--text-h); margin-bottom: 6px; }
.confirm-body  { font-size: 13px; color: var(--text-2); line-height: 1.6; margin-bottom: 22px; }
.confirm-btns  { display: flex; gap: 8px; justify-content: flex-end; }
.confirm-btn-cancel {
  padding: 9px 18px; background: var(--surface2); border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); font-family: var(--font-body); font-size: 13px;
  font-weight: 600; color: var(--text-2); cursor: pointer; transition: all .15s;
}
.confirm-btn-cancel:hover { background: var(--border); color: var(--text-h); }
.confirm-btn-ok {
  padding: 9px 20px; border: none; border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: 13px; font-weight: 700;
  cursor: pointer; transition: all .15s; color: #fff;
}
.confirm-btn-ok.danger  { background: var(--red); }
.confirm-btn-ok.warning { background: var(--amber); }
.confirm-btn-ok.teal    { background: var(--teal); }
.confirm-btn-ok:hover   { filter: brightness(1.1); transform: translateY(-1px); }


/* ── GLOBAL TOOLTIP ──────────────────────────────── */
#gtt {
  position: fixed;
  background: #0f172a;
  color: #f1f5f9;
  border-radius: 10px;
  padding: 13px 16px;
  width: 272px;
  font-size: 12px;
  line-height: 1.65;
  font-family: var(--font-body, sans-serif);
  box-shadow: 0 10px 32px rgba(0,0,0,.45);
  pointer-events: none;
  z-index: 99999;
  border: 1px solid rgba(255,255,255,.1);
  display: none;
}
#gtt.show { display: block; }
#gtt-title {
  font-weight: 800;
  font-size: 13px;
  color: #38bdf8;
  margin-bottom: 7px;
  display: block;
}
.gtt-row { display: flex; gap: 7px; margin-bottom: 4px; align-items: flex-start; }
.gtt-dot { color: #38bdf8; flex-shrink: 0; }
#gtt::before {
  content: '';
  position: absolute;
  top: -7px;
  left: var(--arr, 20px);
  border: 7px solid transparent;
  border-top: none;
  border-bottom-color: #0f172a;
}
        /* ══ DIFFICULTY SYSTEM ══════════════════════════════════════ */
        .diff-row { display:flex; gap:8px; margin-top:12px; }
        .diff-btn {
            flex:1; padding:8px 0; border-radius:9px;
            border:2px solid var(--border,#e2e8f0);
            font-size:12px; font-weight:700; cursor:pointer;
            background:var(--surface2,#f8fafc);
            color:var(--text-2,#64748b);
            transition:all 0.18s ease; font-family:inherit;
        }
        .diff-btn:hover { transform:translateY(-1px); }
        .diff-btn.active-E { background:rgba(34,197,94,.12); border-color:#22c55e; color:#15803d; }
        .diff-btn.active-M { background:rgba(234,179,8,.12);  border-color:#eab308; color:#854d0e; }
        .diff-btn.active-H { background:rgba(239,68,68,.12);  border-color:#ef4444; color:#991b1b; }
        .diff-rubric {
            margin-top:9px; font-size:11px; color:var(--text-3,#94a3b8);
            display:grid; grid-template-columns:repeat(3,1fr); gap:5px;
        }
        .diff-rubric span {
            background:var(--surface2,#f8fafc); border-radius:7px;
            padding:5px 8px; line-height:1.45;
        }
        .diff-rubric strong { display:block; margin-bottom:1px; }
        /* Sidebar dot */
        .qi-diff {
            display:inline-flex; align-items:center; justify-content:center;
            width:15px; height:15px; border-radius:50%;
            font-size:8px; font-weight:800; flex-shrink:0;
        }
        .qi-diff-E { background:rgba(34,197,94,.15);  color:#15803d; }
        .qi-diff-M { background:rgba(234,179,8,.15);  color:#854d0e; }
        .qi-diff-H { background:rgba(239,68,68,.15);  color:#991b1b; }

        /* ══ EXAM BUILDER OVERLAY ════════════════════════════════ */
        #ebOverlay {
            position:fixed; inset:0; z-index:1200;
            background:rgba(0,0,0,.55);
            display:none; align-items:center; justify-content:center; padding:16px;
        }
        #ebOverlay.open { display:flex; }
        .eb-modal {
            background:var(--bg-card,#fff); border-radius:20px;
            width:100%; max-width:740px; max-height:90vh;
            display:flex; flex-direction:column;
            box-shadow:0 24px 80px rgba(0,0,0,.22); overflow:hidden;
        }
        .eb-head {
            padding:20px 26px 14px;
            border-bottom:1px solid var(--border,#e2e8f0); flex-shrink:0;
        }
        .eb-head-title {
            font-family:'Space Grotesk',sans-serif;
            font-size:19px; font-weight:700;
            color:var(--dark,#1a2c2e); margin-bottom:3px;
        }
        .eb-head-sub { font-size:12px; color:var(--text-3,#94a3b8); }
        .eb-toolbar {
            padding:12px 22px;
            border-bottom:1px solid var(--border,#e2e8f0);
            display:flex; gap:8px; flex-wrap:wrap; align-items:center;
            background:var(--surface,#f8fafc); flex-shrink:0;
        }
        .eb-flt {
            padding:5px 13px; border-radius:20px;
            border:1.5px solid var(--border,#e2e8f0);
            background:var(--bg-card,#fff);
            font-size:12px; font-weight:600; cursor:pointer;
            font-family:inherit; color:var(--text-2,#64748b); transition:all .18s;
        }
        .eb-flt.on { background:var(--dark,#1a2c2e); border-color:var(--dark,#1a2c2e); color:#fff; }
        .eb-flt.fE.on { background:#22c55e; border-color:#22c55e; color:#fff; }
        .eb-flt.fM.on { background:#eab308; border-color:#eab308; color:#1a1a1a; }
        .eb-flt.fH.on { background:#ef4444; border-color:#ef4444; color:#fff; }
        .eb-random {
            display:flex; gap:6px; align-items:center; margin-left:auto;
        }
        .eb-random label { font-size:11px; color:var(--text-3,#94a3b8); }
        .eb-n {
            width:54px; padding:5px 7px;
            border:1.5px solid var(--border,#e2e8f0); border-radius:7px;
            font-size:13px; text-align:center;
            font-family:'Roboto Mono',monospace;
        }
        .eb-pick {
            padding:5px 13px; background:var(--teal,#0f7ea3); color:#fff;
            border:none; border-radius:7px; font-size:12px; font-weight:600;
            cursor:pointer; font-family:inherit; transition:all .18s;
        }
        .eb-pick:hover { filter:brightness(1.08); }
        .eb-list { flex:1; overflow-y:auto; padding:10px 18px; }
        .eb-item {
            display:flex; align-items:flex-start; gap:11px;
            padding:11px 13px; border:1.5px solid var(--border,#e2e8f0);
            border-radius:11px; margin-bottom:7px; cursor:pointer;
            transition:all .18s; background:var(--bg-card,#fff);
        }
        .eb-item:hover { border-color:var(--teal,#0f7ea3); }
        .eb-item.sel {
            border-color:var(--teal,#0f7ea3);
            background:rgba(15,126,163,.05);
        }
        .eb-item input[type=checkbox] {
            width:16px; height:16px; flex-shrink:0;
            accent-color:var(--teal,#0f7ea3); margin-top:2px; cursor:pointer;
        }
        .eb-ib { flex:1; min-width:0; }
        .eb-iid {
            font-family:'Roboto Mono',monospace; font-size:11px;
            color:var(--teal,#0f7ea3); font-weight:700; margin-bottom:2px;
        }
        .eb-itxt {
            font-size:13px; color:var(--text-1,#1a2c2e);
            white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
        }
        .eb-idiff {
            font-size:11px; font-weight:700;
            padding:2px 8px; border-radius:100px; flex-shrink:0; align-self:center;
        }
        .eb-dE { background:rgba(34,197,94,.12); color:#15803d; }
        .eb-dM { background:rgba(234,179,8,.12);  color:#854d0e; }
        .eb-dH { background:rgba(239,68,68,.12);  color:#991b1b; }
        .eb-foot {
            padding:14px 26px;
            border-top:1px solid var(--border,#e2e8f0);
            display:flex; align-items:center; gap:10px; flex-wrap:wrap; flex-shrink:0;
        }
        .eb-counter {
            font-family:'Roboto Mono',monospace;
            font-size:13px; font-weight:700; color:var(--teal,#0f7ea3);
        }
        .eb-counter em { color:var(--text-3,#94a3b8); font-style:normal; font-weight:400; }
        .eb-bpill {
            padding:2px 8px; border-radius:100px;
            font-size:11px; font-weight:700;
        }
        .eb-bE { background:rgba(34,197,94,.12); color:#15803d; }
        .eb-bM { background:rgba(234,179,8,.12);  color:#854d0e; }
        .eb-bH { background:rgba(239,68,68,.12);  color:#991b1b; }
    
        /* ══ SMART MIX PANEL ════════════════════════════════════ */
        .eb-mix-panel {
            display:none;
            background:var(--surface,#f8fafc);
            border:1.5px solid var(--border,#e2e8f0);
            border-radius:14px;
            padding:16px 20px;
            margin:0 18px 10px;
            flex-shrink:0;
        }
        .eb-mix-panel.open { display:block; }
        .eb-mix-title {
            font-size:13px; font-weight:700;
            color:var(--dark,#1a2c2e);
            margin-bottom:12px;
        }
        .eb-mix-rows { display:flex; flex-direction:column; gap:9px; margin-bottom:14px; }
        .eb-mix-row {
            display:grid;
            grid-template-columns:100px 80px 16px 70px;
            align-items:center; gap:10px;
        }
        .eb-mix-label { font-size:12px; font-weight:700; }
        .eb-mix-num {
            width:70px; padding:6px 9px;
            border:1.5px solid var(--border,#e2e8f0);
            border-radius:8px; font-size:14px; font-weight:700;
            text-align:center; font-family:'Roboto Mono',monospace;
            transition:border-color .18s;
        }
        .eb-mix-num:focus { border-color:var(--teal,#0f7ea3); outline:none; }
        .eb-mix-pct {
            font-family:'Roboto Mono',monospace;
            font-size:12px; font-weight:700; text-align:center;
        }
        .eb-mix-count {
            font-size:11px; color:var(--text-3,#94a3b8);
            text-align:right; font-family:'Roboto Mono',monospace;
        }
        .eb-mix-foot {
            display:flex; align-items:center; gap:10px; flex-wrap:wrap;
        }
        .eb-mix-total-wrap {
            font-size:12px; color:var(--text-2,#64748b);
            display:flex; align-items:center; gap:7px;
        }
        .eb-mix-total-wrap input {
            width:52px; padding:5px 7px;
            border:1.5px solid var(--border,#e2e8f0);
            border-radius:7px; font-size:13px; text-align:center;
            font-family:'Roboto Mono',monospace;
        }
        .eb-mix-sum {
            font-family:'Roboto Mono',monospace;
            font-size:12px; font-weight:700;
            padding:3px 9px; border-radius:100px;
        }
        .eb-mix-sum.ok  { background:rgba(34,197,94,.12); color:#15803d; }
        .eb-mix-sum.bad { background:rgba(239,68,68,.12);  color:#991b1b; }
        .eb-mix-warn {
            font-size:11px; color:#b45309;
            background:rgba(234,179,8,.1);
            border-radius:7px; padding:4px 9px;
            display:none; width:100%; margin-top:4px;
        }
        .eb-mix-warn.show { display:block; }
        .eb-mix-apply {
            padding:7px 18px;
            background:linear-gradient(135deg,#7c3aed,#6d28d9);
            color:#fff; border:none; border-radius:9px;
            font-size:12px; font-weight:700; cursor:pointer;
            font-family:inherit; margin-left:auto; transition:all .18s;
        }
        .eb-mix-apply:hover { filter:brightness(1.08); }
        .eb-mix-apply:disabled { opacity:.5; cursor:not-allowed; }




/* === Generated from inline style="" attributes === */
.sd5f7cc { color:var(--teal);font-weight:700 }
.sd493eb { text-transform:uppercase;letter-spacing:1px;font-family:var(--font-mono) }
.sf106ab { text-align:center;margin-top:12px;padding-top:10px;border-top:1px solid var(--border) }
.s1c3d11 { font-size:11px;color:var(--text-3) }
.sae767d { font-size:11px;color:var(--teal);cursor:pointer;font-weight:700 }
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