/* ═══════════════════════════════════════════════════════
   Osmania University – Course Browser v3
   ═══════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600;9..40,700&display=swap');

:root {
  --blue-900:    #1e3a8a;
  --blue-800:    #1e40af;
  --blue-700:    #1d4ed8;
  --blue-600:    #2563eb;
  --blue-500:    #3b82f6;
  --blue-400:    #60a5fa;
  --blue-200:    #bfdbfe;
  --blue-100:    #dbeafe;
  --blue-50:     #eff6ff;
  --violet-700:  #6d28d9;
  --violet-100:  #ede9fe;
  --teal-700:    #0f766e;
  --teal-100:    #ccfbf1;
  --amber-700:   #b45309;
  --amber-100:   #fef3c7;
  --green-800:   #166534;
  --green-100:   #dcfce7;
  --indigo-700:  #3730a3;
  --indigo-100:  #e0e7ff;
  --emerald-700: #065f46;
  --emerald-100: #d1fae5;
  --gray-900:    #111827;
  --gray-800:    #1f2937;
  --gray-700:    #374151;
  --gray-600:    #4b5563;
  --gray-500:    #6b7280;
  --gray-400:    #9ca3af;
  --gray-300:    #d1d5db;
  --gray-200:    #e5e7eb;
  --gray-100:    #f3f4f6;
  --gray-50:     #f9fafb;
  --white:       #ffffff;
  --body-bg:     #f1f5f9;
}

/* ── Reset / Base ────────────────────────────────────── */
#course-browser-wrap,
#course-browser-wrap * { box-sizing: border-box; }

#course-browser-wrap {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--body-bg);
  color: var(--gray-700);
  padding: 40px 24px 80px;
  max-width: 1200px;
  margin: 0 auto;
  line-height: 1.5;
}

/* ── Page Header ─────────────────────────────────────── */
.cb-page-header { margin-bottom: 28px; }
.cb-page-header h1 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--blue-900);
  margin: 0 0 6px;
  letter-spacing: -.02em;
}
.cb-page-header p { color: var(--gray-500); margin: 0; font-size: .9375rem; }

/* ── Top Panel (search + filters) ───────────────────── */
.cb-top-panel {
  background: var(--white);
  border-radius: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  padding: 16px 20px;
  margin-bottom: 20px;
}

/* Search row */
.cb-search-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.cb-search-wrap {
  position: relative;
  flex: 1;
}
.cb-search-wrap iconify-icon {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  font-size: 1rem;
  pointer-events: none;
  display: flex;
}
#cb-search {
  width: 100%;
  padding: 9px 14px 9px 36px;
  font-family: inherit;
  font-size: .875rem;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  outline: none;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color .15s, box-shadow .15s;
}
#cb-search::placeholder { color: var(--gray-400); }
#cb-search:focus {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59,130,246,.15);
}

/* Filter dropdowns row */
.cb-filter-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--gray-200);
}
.cb-filter-col { display: flex; flex-direction: column; gap: 4px; }
.cb-filter-col label {
  font-size: .72rem;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: .05em;
}
.cb-filter-col select {
  padding: 8px 10px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-family: inherit;
  font-size: .875rem;
  color: var(--gray-700);
  background: var(--white);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  cursor: pointer;
}
.cb-filter-col select:focus {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59,130,246,.15);
}
.cb-clear-btn {
  align-self: flex-end;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 14px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  background: var(--white);
  font-family: inherit;
  font-size: .875rem;
  color: var(--gray-600);
  cursor: pointer;
  transition: background .15s, border-color .15s;
  white-space: nowrap;
}
.cb-clear-btn:hover { background: var(--gray-50); border-color: var(--gray-400); }

/* ── Results Bar ─────────────────────────────────────── */
.cb-results-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-size: .875rem;
  color: var(--gray-500);
}
.cb-results-bar strong { color: var(--gray-900); font-weight: 700; font-size: 1rem; }
.cb-add-btn {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--blue-600);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: .8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s;
}
.cb-add-btn:hover { background: var(--blue-700); }

/* ── Course Cards ────────────────────────────────────── */
#cb-cards { display: flex; flex-direction: column; gap: 16px; }

.cb-card {
  background: var(--white);
  border-radius: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.cb-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px -4px rgba(0,0,0,.1);
}

.cb-card-body { padding: 22px 24px; }

/* Badges */
.cb-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}
.cb-badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .02em;
}
.cb-badge-ug      { background: var(--blue-100);    color: var(--blue-800); }
.cb-badge-pg      { background: var(--violet-100);  color: var(--violet-700); }
.cb-badge-phd     { background: var(--teal-100);    color: var(--teal-700); }
.cb-badge-postdoc { background: var(--amber-100);   color: var(--amber-700); }
.cb-badge-diploma { background: var(--emerald-100); color: var(--emerald-700); }
.cb-badge-pgdip   { background: var(--indigo-100);  color: var(--indigo-700); }
.cb-badge-stream  { background: var(--green-100);   color: var(--green-800); }

/* Title */
.cb-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--gray-900);
  margin: 0 0 4px;
  letter-spacing: -.01em;
}
.cb-card-stream {
  font-size: .8375rem;
  color: var(--gray-500);
  margin: 0 0 14px;
}

/* Meta chips */
.cb-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.cb-meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 500;
}
.cb-chip-duration { background: var(--blue-50); color: var(--blue-800); }

/* Eligibility */
.cb-section-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--gray-400);
  margin-bottom: 8px;
}
.cb-section-label iconify-icon { font-size: .9rem; color: var(--blue-500); }
.cb-eligibility-section { margin-bottom: 18px; }
.cb-eligibility-text {
  font-size: .8375rem;
  color: var(--gray-600);
  line-height: 1.65;
  background: var(--gray-50);
  border-left: 3px solid var(--blue-400);
  border-radius: 0 8px 8px 0;
  padding: 10px 14px;
}

/* Specializations */
.cb-spec-section { margin-bottom: 4px; }
.cb-spec-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
  font-size: .8125rem;
  font-weight: 600;
  color: var(--blue-600);
  cursor: pointer;
  margin-bottom: 10px;
  transition: color .15s;
}
.cb-spec-toggle:hover { color: var(--blue-800); }
.cb-spec-toggle iconify-icon {
  font-size: 1rem;
  transition: transform .2s ease;
  display: flex;
}
.cb-spec-toggle.open iconify-icon { transform: rotate(180deg); }

.cb-spec-list {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 4px;
}
.cb-spec-list.visible {
  display: flex;
  animation: specIn .18s ease;
}
@keyframes specIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.cb-spec-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: .8125rem;
  color: var(--gray-700);
  transition: background .15s, border-color .15s;
}
.cb-spec-item:hover { background: var(--blue-50); border-color: var(--blue-200); }
.cb-spec-item iconify-icon { color: var(--blue-500); font-size: .9rem; margin-top: 1px; flex-shrink: 0; }

/* Card footer */
.cb-card-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  border-top: 1px solid var(--gray-100);
  background: var(--gray-50);
}
.cb-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 8px;
  font-family: inherit;
  font-size: .8125rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  border: 1px solid transparent;
  transition: all .15s;
}
.cb-btn iconify-icon { font-size: .95rem; display: flex; }
.cb-btn-outline { border-color: var(--gray-300); background: var(--white); color: var(--gray-700); }
.cb-btn-outline:hover { background: var(--gray-50); border-color: var(--gray-400); }
.cb-btn-primary { background: var(--blue-600); color: var(--white); margin-left: auto; }
.cb-btn-primary:hover { background: var(--blue-700); }
.cb-btn-edit { background: var(--white); border-color: var(--blue-300); color: var(--blue-700); }
.cb-btn-edit:hover { background: var(--blue-50); }
.cb-btn-danger { background: #fee2e2; border-color: #fca5a5; color: #b91c1c; }
.cb-btn-danger:hover { background: #fecaca; }

/* ── No results ──────────────────────────────────────── */
.cb-no-results {
  text-align: center;
  padding: 64px 20px;
  color: var(--gray-400);
  background: var(--white);
  border-radius: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.cb-no-results iconify-icon { font-size: 2.5rem; display: block; margin-bottom: 12px; }
.cb-no-results p { margin: 0; font-size: .9375rem; }

/* ── Admin Modal ─────────────────────────────────────── */
.cb-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 99999;
  overflow-y: auto;
  padding: 40px 16px;
}
.cb-modal.open { display: flex; align-items: flex-start; justify-content: center; }
.cb-modal-box {
  background: var(--white);
  border-radius: 16px;
  padding: 32px;
  width: 100%;
  max-width: 520px;
  position: relative;
  box-shadow: 0 20px 40px rgba(0,0,0,.18);
}
.cb-modal-close {
  position: absolute;
  top: 14px; right: 16px;
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  padding: 2px;
  transition: color .15s;
}
.cb-modal-close iconify-icon { font-size: 1.5rem; display: flex; }
.cb-modal-close:hover { color: var(--gray-700); }
#cb-admin-modal h2 { font-size: 1.15rem; font-weight: 700; color: var(--gray-900); margin: 0 0 20px; }
#cb-course-form label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: .8125rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 14px;
}
#cb-course-form input[type="text"],
#cb-course-form input[type="url"],
#cb-course-form input[type="number"],
#cb-course-form select,
#cb-course-form textarea {
  padding: 8px 12px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-family: inherit;
  font-size: .875rem;
  color: var(--gray-800);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
#cb-course-form textarea { resize: vertical; }
#cb-course-form input:focus,
#cb-course-form select:focus,
#cb-course-form textarea:focus {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59,130,246,.12);
}
.cb-submit-btn {
  width: 100%;
  padding: 10px;
  background: var(--blue-600);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 4px;
  transition: background .15s;
}
.cb-submit-btn:hover { background: var(--blue-700); }

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 640px) {
  #course-browser-wrap { padding: 24px 12px 60px; }
  .cb-page-header h1 { font-size: 1.4rem; }
  .cb-card-body { padding: 16px; }
  .cb-card-footer { padding: 12px 16px; }
  .cb-filter-row { grid-template-columns: 1fr 1fr; }
  .cb-modal-box { padding: 22px 16px; }
}