/* ===== Classroom Styles ===== */

/* --- Index page card --- */
.home-classroom-card {
  max-width: 700px; margin: 0 auto 24px; padding: 20px 24px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  flex-wrap: wrap;
}
.hc-left { display: flex; align-items: center; gap: 14px; }
.hc-icon { font-size: 1.6rem; }
.hc-title { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.hc-subtitle { font-size: 0.85rem; color: var(--text-muted); margin-top: 2px; }
.hc-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.hc-join-row { display: flex; gap: 6px; }
.hc-join-input {
  width: 100px; padding: 6px 10px; font-size: 0.9rem;
  background: var(--bg-surface); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; text-transform: uppercase; letter-spacing: 2px; text-align: center;
  font-family: inherit;
}
.hc-join-input::placeholder { letter-spacing: normal; text-transform: none; }

/* Recent joined quizzes */
.hc-recent { width: 100%; margin-top: 4px; }
.hc-recent-label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
.hc-recent-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 10px; border-radius: 8px; text-decoration: none; color: var(--text);
  font-size: 0.85rem; transition: background 0.15s;
}
.hc-recent-item:hover { background: var(--bg-hover); }
.hc-recent-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; min-width: 0; }
.hc-recent-score { font-size: 0.8rem; font-weight: 600; color: var(--primary-light); margin-left: 10px; flex-shrink: 0; }

/* --- Shared classroom page --- */
.classroom-page {
  max-width: 900px; margin: 0 auto; padding: 30px 20px;
}
.classroom-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 28px; flex-wrap: wrap; gap: 12px;
}
.classroom-header h1 { font-size: 1.5rem; }
.classroom-empty {
  text-align: center; padding: 60px 20px; color: var(--text-muted);
}
.classroom-empty .btn-primary { margin-top: 16px; }

/* --- My Quizzes list --- */
.classroom-quiz-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px;
  padding: 18px 20px; margin-bottom: 12px;
}
.cq-card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.cq-card-title { font-weight: 600; font-size: 1.05rem; margin-bottom: 2px; }
.cq-card-topic { font-size: 0.8rem; color: var(--primary-light); margin-bottom: 6px; }
.cq-card-meta { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-muted); flex-wrap: wrap; }
.cq-status { font-weight: 700; font-size: 0.75rem; letter-spacing: 0.5px; }
.cq-sep { color: var(--text-muted); }
.cq-card-code {
  display: flex; flex-direction: column; align-items: center;
  background: var(--bg-surface); border-radius: 8px; padding: 8px 14px;
}
.cq-code-label { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.cq-code-value { font-weight: 700; font-size: 1.1rem; letter-spacing: 2px; font-family: monospace; }
.cq-card-actions { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }

/* --- Create quiz --- */
.cq-create-section { margin-bottom: 32px; }
.cq-create-section h2 { font-size: 1.2rem; margin-bottom: 16px; }
.cq-create-form { display: flex; flex-direction: column; gap: 16px; }
.cq-form-row { display: flex; flex-direction: column; gap: 6px; }
.cq-form-row label { font-size: 0.85rem; color: var(--text-muted); font-weight: 600; }
.cq-input {
  padding: 10px 14px; font-size: 0.95rem; background: var(--bg-surface);
  color: var(--text); border: 1px solid var(--border); border-radius: 8px;
  font-family: inherit;
}
.cq-input:focus { outline: none; border-color: var(--primary); }
.cq-select {
  padding: 10px 14px; font-size: 0.95rem; background: var(--bg-surface);
  color: var(--text); border: 1px solid var(--border); border-radius: 8px;
  font-family: inherit; cursor: pointer;
}
.cq-num-picker { display: flex; align-items: center; gap: 12px; }
.cq-num-btn {
  width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--border);
  background: var(--bg-surface); color: var(--text); font-size: 1.2rem;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
}
.cq-num-btn:hover { background: var(--primary); border-color: var(--primary); }
.cq-form-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* --- Question editor --- */
.cq-edit-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.cq-edit-count { font-size: 0.85rem; color: var(--text-muted); }
.cq-question-edit {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 18px; margin-bottom: 12px;
}
.cq-qe-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.cq-qe-num { font-weight: 700; font-size: 0.85rem; color: var(--primary-light); }
.cq-qe-actions { display: flex; gap: 4px; }
.cq-qe-btn {
  width: 28px; height: 28px; border-radius: 6px; border: 1px solid var(--border);
  background: transparent; color: var(--text-muted); font-size: 1rem;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
}
.cq-qe-btn:hover { background: var(--bg-surface); color: var(--text); }
.cq-qe-delete:hover { background: #dc2626; color: white; border-color: #dc2626; }
.cq-qe-question {
  width: 100%; padding: 8px 10px; font-size: 0.9rem; background: var(--bg-surface);
  color: var(--text); border: 1px solid var(--border); border-radius: 6px;
  font-family: inherit; resize: vertical; margin-bottom: 10px;
  overflow-y: hidden; min-height: 2.4em;
}
.cq-qe-choices { display: flex; flex-direction: column; gap: 6px; margin-bottom: 8px; }
.cq-qe-choice { display: flex; align-items: center; gap: 8px; }
.cq-qe-choice input[type="radio"] { accent-color: var(--primary); }
.cq-qe-choice-letter { font-size: 0.8rem; font-weight: 700; color: var(--text-muted); min-width: 16px; text-align: center; }
.cq-qe-remove-choice { font-size: 0.85rem; padding: 2px 6px; opacity: 0.5; }
.cq-qe-remove-choice:hover { opacity: 1; color: #e74c3c; }
.cq-qe-add-choice { margin-top: 4px; font-size: 0.8rem; padding: 4px 10px; align-self: flex-start; opacity: 0.7; }
.cq-qe-add-choice:hover { opacity: 1; }
.cq-qe-multi-toggle { margin-bottom: 6px; }
.cq-toggle-label { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; color: var(--text-muted); cursor: pointer; }
.cq-toggle-label input[type="checkbox"] { accent-color: var(--primary); }
.cq-multi-hint { font-size: 0.78rem; color: var(--primary); font-weight: 600; margin-bottom: 4px; }
.cq-qe-choice-input {
  flex: 1; padding: 6px 10px; font-size: 0.85rem; background: var(--bg-surface);
  color: var(--text); border: 1px solid var(--border); border-radius: 6px;
  font-family: inherit;
}
.cq-qe-image-area { margin-bottom: 10px; }
.cq-qe-image-btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px;
  font-size: 0.8rem; color: var(--text-muted); background: var(--bg-surface);
  border: 1px dashed var(--border); border-radius: 6px; cursor: pointer;
  font-family: inherit; transition: border-color 0.15s, color 0.15s;
}
.cq-qe-image-btn:hover { border-color: var(--primary); color: var(--text); }
.cq-qe-image-preview {
  position: relative; display: inline-block; margin-bottom: 8px;
}
.cq-qe-image-preview img {
  max-width: 100%; max-height: 200px; border-radius: 8px;
  border: 1px solid var(--border);
}
.cq-qe-image-remove {
  position: absolute; top: 6px; right: 6px; width: 24px; height: 24px;
  border-radius: 50%; border: none; background: rgba(0,0,0,0.7); color: white;
  font-size: 1rem; cursor: pointer; display: flex; align-items: center;
  justify-content: center; line-height: 1;
}
.cq-qe-image-remove:hover { background: #dc2626; }
.cq-qe-explanation { margin-top: 4px; }
.cq-qe-explanation label { font-size: 0.75rem; color: var(--text-muted); }

/* --- Published result --- */
.cq-published { text-align: center; padding: 40px 20px; }
.cq-code-display {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  margin: 20px 0;
}
.cq-code-big {
  font-size: 2.5rem; font-weight: 800; letter-spacing: 6px; font-family: monospace;
  color: var(--primary-light);
}

/* --- Take quiz --- */
.cq-take-header { margin-bottom: 24px; }
.cq-take-header h1 { font-size: 1.4rem; margin-bottom: 4px; }
.cq-take-meta { color: var(--text-muted); font-size: 0.9rem; }
.cq-name-row { display: flex; align-items: center; gap: 10px; margin-bottom: 24px; flex-wrap: wrap; }
.cq-name-row label { font-size: 0.85rem; color: var(--text-muted); font-weight: 600; white-space: nowrap; }
.cq-name-row .cq-input { max-width: 280px; }
.cq-take-question {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px;
  padding: 18px 20px; margin-bottom: 14px;
}
.cq-take-qnum { font-weight: 700; font-size: 0.8rem; color: var(--primary-light); margin-bottom: 6px; }
.cq-take-qtext { font-size: 1rem; margin-bottom: 12px; line-height: 1.5; }
.cq-take-qimage {
  max-width: 100%; max-height: 360px; border-radius: 8px; margin-bottom: 14px;
  border: 1px solid var(--border); display: block;
}
.cq-take-choices { display: flex; flex-direction: column; gap: 6px; }
.cq-take-choice {
  display: flex; align-items: center; gap: 10px; padding: 10px 14px;
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: 8px;
  cursor: pointer; font-size: 0.9rem; color: var(--text); width: 100%;
  text-align: left; font-family: inherit; transition: border-color 0.15s;
}
.cq-take-choice:hover { border-color: var(--primary); }
.cq-take-choice.selected { border-color: var(--primary); background: rgba(99,102,241,0.15); }
.cq-take-choice.correct { border-color: #10b981; background: rgba(16,185,129,0.12); }
.cq-take-choice.incorrect { border-color: #ef4444; background: rgba(239,68,68,0.12); }
.cq-take-letter {
  width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.8rem; background: var(--bg-card); flex-shrink: 0;
}
.cq-take-choice.selected .cq-take-letter { background: var(--primary); color: white; }
.cq-take-choice.correct .cq-take-letter { background: #10b981; color: white; }
.cq-take-choice.incorrect .cq-take-letter { background: #ef4444; color: white; }
.cq-submit-area {
  display: flex; align-items: center; gap: 14px; margin-top: 20px; flex-wrap: wrap;
}
.cq-answered { font-size: 0.85rem; color: var(--text-muted); }
.cq-explanation {
  margin-top: 10px; padding: 10px 14px; border-radius: 8px; font-size: 0.85rem; line-height: 1.5;
}
.cq-explanation.correct { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.3); color: #6ee7b7; }
.cq-explanation.incorrect { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: #fca5a5; }
.cq-score-display {
  display: flex; align-items: center; gap: 10px; font-size: 1.2rem; font-weight: 600;
}
.cq-score-emoji { font-size: 1.5rem; }
.cq-score-breakdown {
  display: flex; gap: 16px; font-size: 0.85rem; margin-top: 6px;
}
.cq-breakdown-correct { color: #10b981; font-weight: 600; }
.cq-breakdown-wrong { color: #ef4444; font-weight: 600; }
.cq-take-question.cq-active { border-color: var(--primary); box-shadow: 0 0 0 1px var(--primary); }
.cq-kb-hint { font-size: 0.75rem; color: var(--text-muted); margin-top: 8px; opacity: 0.7; }
.cq-message { text-align: center; padding: 60px 20px; }
.cq-message h2 { margin-bottom: 10px; }
.cq-message p { color: var(--text-muted); }

/* --- Quiz progress bar --- */
.cq-progress-wrap {
  display: flex; align-items: center; gap: 12px; margin-top: 20px; margin-bottom: 4px;
}
.cq-progress-bar {
  flex: 1; height: 6px; background: var(--bg-surface); border-radius: 3px; overflow: hidden;
}
.cq-progress-fill {
  height: 100%; background: var(--primary); border-radius: 3px;
  transition: width 0.3s ease;
}

/* --- Dashboard --- */
.cq-dash-meta { display: flex; align-items: center; gap: 10px; margin-top: 6px; flex-wrap: wrap; }
.cq-dash-status {
  padding: 3px 10px; border-radius: 4px; font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.5px; background: var(--bg-surface);
}
.cq-dash-status-draft { color: #6366f1; }
.cq-dash-status-open { color: #10b981; }
.cq-dash-status-closed { color: #ef4444; }
.cq-dash-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.cq-stats { display: flex; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.cq-stat-card {
  flex: 1; min-width: 120px; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 10px; padding: 18px 20px; text-align: center;
}
.cq-stat-value { font-size: 1.6rem; font-weight: 700; color: var(--primary-light); }
.cq-stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }
.cq-table-wrap { overflow-x: auto; }
.cq-table {
  width: 100%; border-collapse: collapse; font-size: 0.85rem;
}
.cq-table th {
  text-align: left; padding: 10px 12px; font-weight: 600; font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted);
  border-bottom: 1px solid var(--border); white-space: nowrap;
}
.cq-table td {
  padding: 10px 12px; border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.cq-table tbody tr:hover { background: var(--bg-surface); }
.cq-cell-correct { color: #10b981; font-weight: 600; }
.cq-cell-wrong { color: #ef4444; font-weight: 600; }
.cq-cell-skip { color: var(--text-muted); }
.cq-filter-row { display: flex; align-items: center; gap: 8px; }

/* --- Bank picker --- */
.cq-bank-list { max-height: 400px; overflow-y: auto; }
.cq-bank-item {
  display: flex; align-items: flex-start; gap: 10px; padding: 10px 12px;
  border-bottom: 1px solid var(--border); cursor: pointer;
}
.cq-bank-item:hover { background: var(--bg-surface); }
.cq-bank-topic { font-size: 0.75rem; color: var(--primary-light); font-weight: 600; margin-bottom: 2px; }
.cq-bank-question { font-size: 0.85rem; }

/* --- Small button variant --- */
.btn-sm { padding: 6px 14px; font-size: 0.8rem; border-radius: 6px; }
.btn-danger {
  background: #dc2626; color: white; border: none; padding: 8px 16px;
  border-radius: 8px; cursor: pointer; font-family: inherit; font-size: 0.85rem;
}
.btn-danger.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-danger:hover { background: #b91c1c; }

/* --- Toast notifications --- */
.cq-toast-container {
  position: fixed; top: 20px; right: 20px; z-index: 9999;
  display: flex; flex-direction: column; gap: 8px;
}
.cq-toast {
  padding: 12px 20px; border-radius: 8px; font-size: 0.9rem;
  color: white; opacity: 0; transform: translateX(100%);
  animation: toastIn 0.3s ease forwards;
  max-width: 360px; box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.cq-toast.removing { animation: toastOut 0.3s ease forwards; }
.cq-toast.success { background: #059669; }
.cq-toast.error { background: #dc2626; }
.cq-toast.info { background: #4f46e5; }

/* --- Dashboard: score distribution --- */
.cq-distribution {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px;
  padding: 18px 20px; margin-bottom: 24px;
}
.cq-distribution h3 { font-size: 0.9rem; margin-bottom: 12px; color: var(--text-muted); }
.cq-dist-bars { display: flex; align-items: flex-end; gap: 4px; height: 80px; }
.cq-dist-bar-wrap {
  flex: 1; display: flex; flex-direction: column; align-items: center; height: 100%;
  justify-content: flex-end;
}
.cq-dist-bar {
  width: 100%; border-radius: 3px 3px 0 0; background: var(--primary);
  min-height: 2px; transition: height 0.3s ease;
}
.cq-dist-label { font-size: 0.65rem; color: var(--text-muted); margin-top: 4px; }
.cq-dist-count { font-size: 0.65rem; color: var(--text); margin-bottom: 2px; }

/* --- Dashboard: sortable headers --- */
.cq-table th.sortable { cursor: pointer; user-select: none; }
.cq-table th.sortable:hover { color: var(--text); }
.cq-table th .sort-arrow { font-size: 0.7rem; margin-left: 4px; opacity: 0.4; }
.cq-table th.sorted .sort-arrow { opacity: 1; color: var(--primary-light); }

/* --- Question nav pills --- */
.cq-nav-pills {
  display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px;
}
.cq-nav-pill {
  width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--border);
  background: var(--bg-surface); color: var(--text-muted); font-size: 0.75rem;
  font-weight: 600; cursor: pointer; display: flex; align-items: center;
  justify-content: center; font-family: inherit; transition: all 0.15s;
}
.cq-nav-pill:hover { border-color: var(--primary); color: var(--text); }
.cq-nav-pill.answered { background: var(--primary); color: white; border-color: var(--primary); }
.cq-nav-pill.current { box-shadow: 0 0 0 2px var(--primary); }
.cq-nav-pill.pill-correct { background: #10b981; color: white; border-color: #10b981; }
.cq-nav-pill.pill-wrong { background: #ef4444; color: white; border-color: #ef4444; }

/* --- Question Bank page --- */
.cq-bank-controls {
  display: flex; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; align-items: center;
}
.bank-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 14px;
}
.bank-card-meta {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.bank-card-badge {
  font-size: 0.7rem; font-weight: 700; padding: 2px 8px; border-radius: 4px;
  background: rgba(99,102,241,0.15); color: var(--primary-light);
}
.bank-choice-letter {
  font-weight: 700; font-size: 0.75rem; color: var(--text-muted); margin-right: 2px;
}
.bank-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 18px; margin-bottom: 12px;
}
.bank-card-top {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px;
}
.bank-card-topic { font-size: 0.75rem; color: var(--primary-light); font-weight: 600; }
.bank-card-actions { display: flex; gap: 4px; }
.bank-card-question { font-size: 0.95rem; margin-bottom: 10px; line-height: 1.5; white-space: pre-wrap; }
.bank-card-choices { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 6px; }
.bank-choice {
  padding: 4px 10px; font-size: 0.8rem; background: var(--bg-surface);
  border: 1px solid var(--border); border-radius: 6px; color: var(--text-muted);
}
.bank-choice-correct {
  border-color: #10b981; color: #10b981; background: rgba(16,185,129,0.08);
}
.bank-card-explanation {
  font-size: 0.8rem; color: var(--text-muted); font-style: italic; margin-top: 4px;
}
.bank-edit-form { display: flex; flex-direction: column; gap: 10px; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes toastIn {
  from { opacity: 0; transform: translateX(100%); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(100%); }
}