/* ═══════════════════════════════════════════════════
   lecturer-dashboard.css
   BiomedCraft Hub — Lecturer Dashboard
   Shared across all lecturer pages
═══════════════════════════════════════════════════ */


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

body {
  font-family: 'Sora', 'Inter', system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--white);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ═══════════════════════════════════════════════════
   LAYOUT
═══════════════════════════════════════════════════ */
.lec-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--topbar-h) 1fr;
  min-height: 100vh;
}

/* ═══════════════════════════════════════════════════
   TOPBAR
═══════════════════════════════════════════════════ */
.lec-topbar {
  grid-column: 1 / -1;
  grid-row: 1;
  background: var(--bg-navbar);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 100;
}

/* Glow line under topbar */
.lec-topbar::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.4;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lec-logo {
  font-family: 'Sora', sans-serif;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.lec-logo span { color: var(--accent); }

.lec-role-badge {
  padding: 3px 10px;
  background: rgba(0,247,255,0.1);
  border: 1px solid rgba(0,247,255,0.25);
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sidebar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--gray);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 7px;
  border-radius: 8px;
  transition: var(--transition);
}

.sidebar-toggle:hover { color: var(--accent); background: var(--accent-dim); }

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-icon-btn {
  width: 38px; height: 38px;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--gray);
  font-size: 0.9rem;
  cursor: pointer;
  position: relative;
  transition: var(--transition);
  text-decoration: none;
}

.topbar-icon-btn:hover { color: var(--accent); border-color: var(--accent); }

.notif-dot {
  position: absolute;
  top: 6px; right: 6px;
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--bg-navbar);
  animation: notifPulse 2s ease-in-out infinite;
}

@keyframes notifPulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(0,247,255,0.4); }
  50%      { box-shadow: 0 0 0 4px rgba(0,247,255,0); }
}

.topbar-avatar {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--btn-bg));
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  font-size: 0.82rem;
  color: var(--bg-primary);
  cursor: pointer;
  font-family: 'Sora', sans-serif;
  border: 2px solid transparent;
  transition: var(--transition);
}

.topbar-avatar:hover { border-color: var(--accent); }

/* ═══════════════════════════════════════════════════
   SIDEBAR
═══════════════════════════════════════════════════ */
.lec-sidebar {
  grid-column: 1;
  grid-row: 2;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  padding: 20px 0 24px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  transition: transform 0.3s ease;
}

/* Subtle sidebar glow */
.lec-sidebar::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent, var(--accent), transparent);
  opacity: 0.2;
}

/* Lecturer info block */
.sidebar-lecturer {
  padding: 0 18px 18px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 10px;
}

.lecturer-avatar {
  width: 54px; height: 54px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--btn-bg));
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--bg-primary);
  margin-bottom: 10px;
  font-family: 'Sora', sans-serif;
  box-shadow: 0 4px 16px rgba(0,247,255,0.2);
}

.lecturer-name {
  font-family: 'Sora', sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 4px;
}

.lecturer-title {
  font-size: 0.72rem;
  color: var(--gray);
  margin-bottom: 8px;
}

.lecturer-role {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.68rem;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(0,247,255,0.2);
  padding: 3px 9px;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Section label */
.sidebar-label {
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--gray-dim);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: 14px 18px 5px;
}

/* Nav link */
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 10px 18px;
  color: var(--gray);
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: var(--transition);
  position: relative;
}

.sidebar-link i {
  width: 18px;
  text-align: center;
  font-size: 0.88rem;
  flex-shrink: 0;
}

.sidebar-link:hover {
  color: var(--white);
  background: var(--accent-dim);
  border-left-color: rgba(0,247,255,0.3);
}

.sidebar-link.active {
  color: var(--accent);
  background: var(--accent-dim);
  border-left-color: var(--accent);
  font-weight: 600;
}

.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  border-radius: 0 2px 2px 0;
}

.sidebar-badge {
  margin-left: auto;
  background: var(--accent);
  color: var(--bg-primary);
  font-size: 0.62rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 999px;
  font-family: 'Sora', sans-serif;
}

.sidebar-badge.warn {
  background: var(--warning);
  color: #1a0a00;
}

/* Logout */
.sidebar-logout {
  margin-top: auto;
  padding: 16px 18px 0;
  border-top: 1px solid var(--border);
}

.sidebar-logout a {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--gray);
  text-decoration: none;
  font-size: 0.86rem;
  padding: 10px 0;
  transition: var(--transition);
}

.sidebar-logout a:hover { color: var(--danger); }

/* ═══════════════════════════════════════════════════
   MAIN CONTENT
═══════════════════════════════════════════════════ */
.lec-main {
  grid-column: 2;
  grid-row: 2;
  padding: clamp(20px, 4vw, 36px);
  background: var(--bg-primary);
  overflow-y: auto;
}

/* Page header */
.lec-page-header {
  margin-bottom: 28px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

.lec-page-header-text h1 {
  font-family: 'Sora', sans-serif;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}

.lec-page-header-text p { font-size: 0.86rem; color: var(--gray); }

/* Primary action button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: var(--btn-bg);
  color: var(--white);
  border: none;
  border-radius: 10px;
  font-size: 0.86rem;
  font-weight: 700;
  cursor: pointer;
  font-family: 'Sora', sans-serif;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--accent);
  color: var(--bg-primary);
  box-shadow: 0 6px 20px rgba(0,247,255,0.3);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.86rem;
  font-weight: 700;
  cursor: pointer;
  font-family: 'Sora', sans-serif;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-secondary:hover {
  background: var(--accent-mid);
  border-color: var(--accent);
}

.btn-danger-sm {
  padding: 6px 14px;
  background: rgba(248,113,113,0.1);
  border: 1px solid rgba(248,113,113,0.2);
  border-radius: 8px;
  color: var(--danger);
  font-size: 0.76rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Sora', sans-serif;
}

.btn-danger-sm:hover { background: rgba(248,113,113,0.2); }

/* ── Stat cards ── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  animation: fadeUp 0.5s ease both;
}

.stat-card:hover {
  border-color: rgba(0,247,255,0.3);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.stat-card:nth-child(1) { animation-delay: 0.05s; }
.stat-card:nth-child(2) { animation-delay: 0.10s; }
.stat-card:nth-child(3) { animation-delay: 0.15s; }
.stat-card:nth-child(4) { animation-delay: 0.20s; }
.stat-card:nth-child(5) { animation-delay: 0.25s; }

.stat-icon {
  width: 40px; height: 40px;
  background: var(--accent-dim);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 12px;
}

.stat-value {
  font-family: 'Sora', sans-serif;
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label { font-size: 0.76rem; color: var(--gray); }

.stat-trend {
  position: absolute;
  top: 16px; right: 16px;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 999px;
}

.trend-up   { background: rgba(74,222,128,0.12); color: var(--success); }
.trend-down { background: rgba(248,113,113,0.12); color: var(--danger); }

/* Subtle card glow */
.stat-card::after {
  content: '';
  position: absolute;
  top: -30px; right: -30px;
  width: 100px; height: 100px;
  background: radial-gradient(circle, rgba(0,247,255,0.05), transparent 70%);
  pointer-events: none;
}

/* ── Generic dash card ── */
.lec-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
  animation: fadeUp 0.5s ease 0.1s both;
}

.lec-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}

.lec-card-header h2 {
  font-family: 'Sora', sans-serif;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 8px;
}

.lec-card-header h2 i { color: var(--accent); font-size: 0.92rem; }

/* ── Course row (course management) ── */
.course-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: var(--transition);
}

.course-row:last-child { border-bottom: none; padding-bottom: 0; }
.course-row:hover { background: rgba(255,255,255,0.01); border-radius: 8px; padding-left: 6px; }

.course-row-thumb {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.course-row-info { flex: 1; min-width: 0; }

.course-row-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: 'Sora', sans-serif;
}

.course-row-meta { font-size: 0.75rem; color: var(--gray); }

.course-status {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.status-published { background: rgba(74,222,128,0.12); color: var(--success); }
.status-draft     { background: rgba(245,158,11,0.12);  color: var(--warning); }
.status-review    { background: rgba(0,247,255,0.1);    color: var(--accent); }

.course-row-actions { display: flex; gap: 6px; flex-shrink: 0; }

.btn-icon {
  width: 32px; height: 32px;
  background: var(--accent-dim);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--gray);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 0.78rem;
  text-decoration: none;
  transition: var(--transition);
}

.btn-icon:hover { color: var(--accent); border-color: var(--accent); }
.btn-icon.danger:hover { color: var(--danger); border-color: var(--danger); }

/* ── Student row (enrolled students table) ── */
.students-table {
  width: 100%;
  border-collapse: collapse;
}

.students-table th {
  text-align: left;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--gray-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0 12px 12px;
  border-bottom: 1px solid var(--border);
}

.students-table td {
  padding: 13px 12px;
  font-size: 0.84rem;
  border-bottom: 1px solid rgba(255,255,255,0.03);
  color: var(--white);
  vertical-align: middle;
}

.students-table tr:last-child td { border-bottom: none; }
.students-table tr:hover td { background: rgba(255,255,255,0.02); }

.student-mini-avatar {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--btn-bg));
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--bg-primary);
  font-family: 'Sora', sans-serif;
  flex-shrink: 0;
}

.student-info-cell {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ── Progress bar ── */
.progress-bar {
  height: 5px;
  background: rgba(255,255,255,0.07);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--btn-bg));
  border-radius: 999px;
  transition: width 0.8s cubic-bezier(0.22,1,0.36,1);
}

/* ── Quiz/assignment row ── */
.assignment-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.assignment-row:last-child { border-bottom: none; }

.assignment-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.assignment-info { flex: 1; min-width: 0; }

.assignment-name {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 2px;
  font-family: 'Sora', sans-serif;
}

.assignment-meta { font-size: 0.74rem; color: var(--gray); }

/* ── Form elements ── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }

.form-group label {
  font-size: 0.76rem;
  color: var(--gray);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 11px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  color: var(--white);
  font-size: 14px;
  font-family: 'Sora', sans-serif;
  outline: none;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,247,255,0.1);
  background: rgba(0,247,255,0.03);
}

.form-group input::placeholder { color: rgba(148,163,184,0.4); }
.form-group select option { background: var(--bg-card); }
.form-group textarea { resize: vertical; min-height: 100px; }

/* ── Upload zone ── */
.upload-zone {
  border: 2px dashed rgba(0,247,255,0.2);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: rgba(0,247,255,0.02);
}

.upload-zone:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.upload-zone i { font-size: 2rem; color: var(--accent); margin-bottom: 10px; display: block; }
.upload-zone p { font-size: 0.84rem; color: var(--gray); }
.upload-zone span { font-size: 0.76rem; color: var(--accent); font-weight: 600; }

/* ── Notification / alert strip ── */
.alert-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 0.82rem;
  margin-bottom: 20px;
}

.alert-info    { background: rgba(0,247,255,0.08);    border: 1px solid rgba(0,247,255,0.2);    color: var(--accent); }
.alert-warning { background: rgba(245,158,11,0.08);   border: 1px solid rgba(245,158,11,0.2);   color: var(--warning); }
.alert-success { background: rgba(74,222,128,0.08);   border: 1px solid rgba(74,222,128,0.2);   color: var(--success); }

/* ── Mobile overlay ── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 199;
  top: var(--topbar-h);
  backdrop-filter: blur(2px);
}

.sidebar-overlay.show { display: block; }

/* ═══════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .lec-layout { grid-template-columns: 1fr; }

  .lec-sidebar {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    height: calc(100vh - var(--topbar-h));
    z-index: 200;
    transform: translateX(-100%);
    width: var(--sidebar-w);
  }

  .lec-sidebar.open { transform: translateX(0); }
  .sidebar-toggle   { display: flex; }
  .lec-main         { grid-column: 1; padding: 20px 16px; }
}

@media (max-width: 600px) {
  .stats-row { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .form-group.full { grid-column: 1; }
  .lec-page-header { flex-direction: column; align-items: flex-start; }
  .students-table th:nth-child(4),
  .students-table td:nth-child(4) { display: none; }
}