/**
 * NTMK Custom Exam Styling — TypeUI Creative & Athenaeum Codex
 * Deep obsidian glassmorphism, responsive 2-column grid, tactile controls, zero raw emoji
 */

.custom-exam-container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

/* ─── 1. Header Banner ─── */
.custom-exam-header-banner {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.95) 0%, rgba(15, 23, 42, 0.98) 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 32px 30px;
  margin-bottom: 24px;
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.35);
  color: #f8fafc;
}

.custom-exam-header-banner .header-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.custom-exam-header-banner .header-title {
  font-size: 2rem;
  font-weight: 800;
  color: #f8fafc;
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.custom-exam-header-banner .title-icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.3) 0%, rgba(217, 119, 6, 0.15) 100%);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fbbf24;
}

.custom-exam-header-banner .header-desc {
  font-size: 0.95rem;
  color: #94a3b8;
  margin: 0;
  max-width: 680px;
  line-height: 1.6;
}

/* ─── 2. Grid Layout ─── */
.custom-exam-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 24px;
  align-items: start;
}

@media (max-width: 900px) {
  .custom-exam-grid {
    grid-template-columns: 1fr;
  }
}

.custom-exam-settings-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ─── 3. Config Cards ─── */
.config-card {
  background: rgba(30, 41, 59, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 22px 24px;
  backdrop-filter: blur(12px);
  color: #f8fafc;
  transition: border-color 0.2s ease;
}

.config-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.card-header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 10px;
}

.config-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #f8fafc;
  margin: 0 0 14px;
}

.card-header-flex .config-title {
  margin: 0;
}

/* Grade Filter Pills */
.grade-filter-pills {
  display: flex;
  gap: 6px;
}

.grade-pill-btn {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #94a3b8;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.grade-pill-btn:hover {
  color: #f8fafc;
  border-color: rgba(255, 255, 255, 0.2);
}

.grade-pill-btn.active {
  background: rgba(124, 58, 237, 0.25);
  border-color: rgba(124, 58, 237, 0.6);
  color: #c084fc;
}

/* Subject Pills */
.subject-pills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sub-pill {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #cbd5e1;
  padding: 9px 16px;
  border-radius: 12px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.sub-pill .sub-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.sub-pill:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #f8fafc;
  transform: translateY(-1px);
}

.sub-pill.active {
  background: rgba(245, 158, 11, 0.15);
  border-color: rgba(245, 158, 11, 0.5);
  color: #fbbf24;
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.15);
}

/* Select All / Deselect Group */
.select-all-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.link-btn {
  background: transparent;
  border: none;
  color: #818cf8;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  padding: 2px 4px;
}

.link-btn:hover {
  text-decoration: underline;
  color: #a5b4fc;
}

.sep {
  color: #475569;
  font-size: 0.75rem;
}

/* Lessons Checklist */
.lessons-checklist {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 6px;
}

.lessons-checklist::-webkit-scrollbar {
  width: 5px;
}

.lessons-checklist::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 10px;
}

.lesson-check-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.05);
  cursor: pointer;
  transition: all 0.15s ease;
}

.lesson-check-row:hover {
  background: rgba(15, 23, 42, 0.8);
  border-color: rgba(255, 255, 255, 0.12);
}

.lesson-check-row input[type="checkbox"] {
  accent-color: #7c3aed;
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.lesson-name {
  flex: 1;
  font-size: 0.88rem;
  font-weight: 600;
  color: #e2e8f0;
}

.lesson-count-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: #94a3b8;
}

.no-lessons-hint {
  padding: 20px;
  text-align: center;
  color: #64748b;
  font-size: 0.9rem;
}

/* ─── 4. Matrix Inputs ─── */
.matrix-inputs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.matrix-input-item {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 14px 16px;
}

.input-label-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 10px;
}

.input-label-row label {
  font-size: 0.82rem;
  font-weight: 700;
  color: #cbd5e1;
}

.available-hint {
  font-size: 0.75rem;
  color: #fbbf24;
}

.stepper-input {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stepper-input input[type="number"] {
  width: 90px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #f8fafc;
  font-size: 1.1rem;
  font-weight: 800;
  text-align: center;
  border-radius: 10px;
  padding: 8px 10px;
  outline: none;
  transition: border-color 0.2s ease;
}

.stepper-input input[type="number"]:focus {
  border-color: #7c3aed;
  box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.3);
}

.unit-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: #94a3b8;
}

/* ─── 5. Duration Presets & Shuffle ─── */
.duration-presets-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.duration-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: #cbd5e1;
  margin-right: 4px;
}

.duration-pill {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #94a3b8;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.duration-pill:hover {
  color: #f8fafc;
  background: rgba(255, 255, 255, 0.08);
}

.duration-pill.active {
  background: rgba(245, 158, 11, 0.15);
  border-color: rgba(245, 158, 11, 0.5);
  color: #fbbf24;
}

.exam-shuffle-toggles {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #cbd5e1;
  cursor: pointer;
}

.toggle-row input[type="checkbox"] {
  accent-color: #7c3aed;
  width: 16px;
  height: 16px;
}

/* ─── 6. Right Summary Card ─── */
.summary-sticky-card {
  position: sticky;
  top: 84px;
  background: rgba(30, 41, 59, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 24px;
  backdrop-filter: blur(14px);
  color: #f8fafc;
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.35);
}

.summary-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: #f8fafc;
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.summary-meta-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.summary-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
}

.meta-label {
  color: #94a3b8;
}

.meta-val {
  color: #e2e8f0;
  font-weight: 600;
}

.highlight-val {
  color: #fbbf24;
  font-weight: 800;
  font-size: 1rem;
}

.exam-presets-quick {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 22px;
}

.quick-title {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #94a3b8;
  margin-bottom: 4px;
}

.quick-preset-btn {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #cbd5e1;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 9px 12px;
  border-radius: 10px;
  cursor: pointer;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.quick-preset-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #f8fafc;
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateX(2px);
}

.custom-exam-actions-row {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.start-custom-exam-btn {
  background: linear-gradient(135deg, #7c3aed 0%, #6366f1 100%);
  color: #ffffff;
  border: none;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 13px 20px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 15px rgba(124, 58, 237, 0.35);
  transition: all 0.2s ease;
}

.start-custom-exam-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(124, 58, 237, 0.5);
}

.start-custom-exam-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.print-custom-exam-btn {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #cbd5e1;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 11px 18px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.print-custom-exam-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.08);
  color: #f8fafc;
  border-color: rgba(255, 255, 255, 0.25);
}

.print-custom-exam-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}