/* ================================================================
   OFFLINE CLASS MANAGEMENT — Styles
   Mobile-first, optimized for fast teacher interaction
   ================================================================ */

/* ── Teacher View ─────────────────────────────────────────────── */
.teacher-view-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 1rem;
}

.teacher-greeting {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 1.2rem 1.4rem;
  margin-bottom: 1.25rem;
}
.teacher-greeting-icon { font-size: 2rem; flex-shrink: 0; }
.teacher-greeting-text h2 { font-size: 1.25rem; font-weight: 800; margin: 0 0 0.15rem; }
.teacher-greeting-text p { font-size: 0.85rem; opacity: 0.9; margin: 0; }

.teacher-section-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-primary);
  margin: 1.25rem 0 0.65rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ── Class Cards (Teacher) ───────────────────────────────────── */
.teacher-class-card {
  background: var(--bg-surface);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.teacher-class-card:hover { border-color: var(--color-primary); box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
.teacher-class-card.has-session { border-color: var(--color-success); background: var(--bg-success-soft, #f0fdf4); }

.class-card-icon {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.2rem; flex-shrink: 0;
}
.teacher-class-card.has-session .class-card-icon { background: var(--color-success); }

.class-card-info { flex: 1; min-width: 0; }
.class-card-name { font-weight: 800; font-size: 0.98rem; color: var(--text-main); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.class-card-meta { font-size: 0.78rem; color: var(--text-muted); margin-top: 0.15rem; }

.class-card-action { flex-shrink: 0; }
.btn-attend {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: background 0.2s;
}
.btn-attend:hover { background: var(--color-primary-dark, #3730a3); }
.btn-attend.completed { background: var(--color-success); }
.btn-dayoff {
  background: var(--bg-surface-solid, #f1f5f9);
  color: var(--text-muted);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.55rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: background 0.2s, color 0.2s;
  margin-top: 0.4rem;
}
.btn-dayoff:hover { background: #fef9c3; color: #92400e; border-color: #fcd34d; }
.teacher-class-card.has-dayoff { border-color: var(--color-warning, #f59e0b); background: #fffbeb; }
.teacher-class-card.has-dayoff .class-card-icon { background: var(--color-warning, #f59e0b); }

/* ── Teacher Tabs ────────────────────────────────────────────── */
.teacher-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-color);
  margin: 1rem 0 0.75rem;
}
.teacher-tab {
  padding: 0.5rem 1rem;
  font-size: 0.88rem;
  font-weight: 700;
  background: none;
  border: none;
  border-bottom: 2.5px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.15s;
}
.teacher-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}
.teacher-tab:hover:not(.active) { color: var(--text-main); }

/* ── Teacher History ─────────────────────────────────────────── */
.teacher-history-year { margin-bottom: 1.5rem; }
.teacher-history-year-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--color-primary);
  padding: 0.4rem 0.5rem;
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border-color);
  margin-bottom: 0.6rem;
}
.teacher-history-year-header > span:nth-child(2) { margin-left: auto; }
.teacher-history-month { margin-bottom: 1rem; }
.teacher-history-month-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--text-muted);
  padding: 0.3rem 0;
  border-bottom: 1.5px solid var(--border-color);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.teacher-history-month-header > span:nth-child(2) { margin-left: auto; }
.teacher-history-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.2rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  transition: background 0.12s;
}
.teacher-history-row:hover { background: var(--bg-hover, #f3f4f6); }
.teacher-history-date { font-size: 0.82rem; font-weight: 700; min-width: 90px; flex-shrink: 0; }
.teacher-history-class { font-size: 0.85rem; flex: 1; }
.teacher-history-badge { font-size: 0.75rem; font-weight: 700; flex-shrink: 0; }
.th-toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--color-primary);
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.12s;
}
.th-toggle-btn:hover { background: var(--bg-hover, #f3f4f6); }
.th-toggle-more {
  display: block;
  width: 100%;
  margin-top: 0.4rem;
  border-radius: var(--radius-sm);
  padding: 0.35rem;
  text-align: center;
}

/* ── Attendance Full Screen ──────────────────────────────────── */
#attendance-view {
  background: var(--bg-main);
  min-height: 100vh;
}
.attendance-wrap {
  max-width: 700px;
  margin: 0 auto;
  padding: 0.75rem 1rem 5rem;
}

.attendance-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-primary);
  color: #fff;
  padding: 0.85rem 1rem;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  margin: -0.75rem -1rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.attendance-header-back {
  background: rgba(255,255,255,0.2);
  border: none;
  color: #fff;
  border-radius: 50%;
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  flex-shrink: 0;
}
.attendance-header-info { flex: 1; min-width: 0; }
.attendance-header-info h3 { font-size: 1rem; font-weight: 800; margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.attendance-header-info p { font-size: 0.78rem; opacity: 0.85; margin: 0; }

.attendance-stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.att-stat {
  background: var(--bg-surface);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.6rem;
  text-align: center;
}
.att-stat-num { font-size: 1.4rem; font-weight: 800; line-height: 1; }
.att-stat-label { font-size: 0.7rem; color: var(--text-muted); margin-top: 0.15rem; font-weight: 700; }
.att-stat.present .att-stat-num { color: var(--color-success); }
.att-stat.absent .att-stat-num { color: var(--color-danger); }
.att-stat.late .att-stat-num { color: var(--color-warning, #f59e0b); }

/* ── Student Row (attendance) ───────────────────────────────── */
.att-student-list { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1rem; }

.att-student-row {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 0.85rem;
  transition: border-color 0.15s;
}
.att-student-row.status-present { border-color: var(--color-success); background: rgba(34,197,94,0.06); }
.att-student-row.status-absent  { border-color: var(--color-danger);  background: rgba(239,68,68,0.06); }
.att-student-row.status-late    { border-color: var(--color-warning, #f59e0b); background: rgba(245,158,11,0.06); }

.att-student-name { flex: 1; font-weight: 700; font-size: 0.95rem; color: var(--text-main); }
.att-student-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100px;
}

.att-status-btns { display: flex; gap: 0.3rem; flex-shrink: 0; }
.att-status-btn {
  width: 38px; height: 38px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-main);
  cursor: pointer;
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.att-status-btn:hover { transform: scale(1.08); }
.att-status-btn.active-present { border-color: var(--color-success); background: var(--color-success); color: #fff; }
.att-status-btn.active-absent  { border-color: var(--color-danger);  background: var(--color-danger);  color: #fff; }
.att-status-btn.active-late    { border-color: var(--color-warning, #f59e0b); background: var(--color-warning, #f59e0b); color: #fff; }

.att-note-input {
  width: 100%;
  margin-top: 0.4rem;
  font-size: 0.8rem;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  color: var(--text-main);
  display: none;
}
.att-student-row.status-absent .att-note-input,
.att-student-row.status-late .att-note-input { display: block; }

/* ── Submit bar (fixed bottom) ───────────────────────────────── */
.attendance-submit-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--bg-surface);
  border-top: 1.5px solid var(--border-color);
  padding: 0.85rem 1rem;
  display: flex;
  gap: 0.75rem;
  z-index: 100;
  box-shadow: 0 -4px 16px rgba(0,0,0,0.1);
}
.btn-submit-attendance {
  flex: 1;
  background: var(--color-success);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 0.85rem;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: background 0.2s;
}
.btn-submit-attendance:hover { background: #16a34a; }
.btn-submit-attendance:disabled { background: var(--text-muted); cursor: not-allowed; }

/* ── Admin: Class Management ─────────────────────────────────── */
.class-mgmt-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.class-grade-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0 0 1rem;
}
.class-grade-btn {
  padding: 0.28rem 0.9rem;
  border-radius: 2rem;
  border: 1.5px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-muted);
  font-size: 0.81rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.class-grade-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.class-grade-btn.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.class-list-grid {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.admin-class-card {
  background: var(--bg-surface);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  position: relative;
  transition: box-shadow 0.2s;
}
.admin-class-card:hover { box-shadow: 0 2px 12px rgba(0,0,0,0.09); }
.admin-class-card-header { display: flex; align-items: flex-start; gap: 0.6rem; margin-bottom: 0.5rem; }
.admin-class-badge {
  display: inline-flex; align-items: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 800;
  flex-shrink: 0;
  margin-top: 0.15rem;
}
.admin-class-name { font-weight: 800; font-size: 1rem; color: var(--text-main); line-height: 1.3; flex: 1; }
.admin-class-meta { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 0.5rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.admin-class-meta span { display: flex; align-items: center; gap: 0.25rem; }
.admin-class-actions { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.65rem; }

/* Student management */
.student-list-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.student-list-table th {
  background: var(--bg-surface-solid);
  padding: 0.6rem 0.75rem;
  text-align: left;
  font-weight: 700;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border-color);
}
.student-list-table td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}
.student-list-table tr:hover td { background: var(--bg-surface-hover); }

/* ── Fee Management ──────────────────────────────────────────── */
.fee-filter-bar {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 1rem;
}

.fee-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
}
.fee-status-badge.unpaid   { background: #fef3c7; color: #92400e; }
.fee-status-badge.overdue  { background: #fee2e2; color: #991b1b; }
.fee-status-badge.paid     { background: #dcfce7; color: #166534; }
.fee-status-badge.partial  { background: #e0f2fe; color: #075985; }
.fee-status-badge.waived   { background: #f3f4f6; color: #6b7280; }

.fee-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.fee-table th {
  background: var(--bg-surface-solid);
  padding: 0.6rem 0.75rem;
  text-align: left;
  font-weight: 700;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
}
.fee-table td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}
.fee-table tr:hover td { background: var(--bg-surface-hover); }

/* ── Class Detail Panel ──────────────────────────────────────── */
.class-detail-tabs {
  display: flex;
  gap: 0.25rem;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 1rem;
}
.class-detail-tab {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
}
.class-detail-tab.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

/* ── Zalo send panel ─────────────────────────────────────────── */
.zalo-send-btn {
  background: #0068FF;
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: background 0.2s;
}
.zalo-send-btn:hover { background: #0052CC; }
.zalo-send-btn.sent { background: var(--color-success); }

/* ── Attendance History Cards ────────────────────────────────── */
.session-history-list { display: flex; flex-direction: column; gap: 0.6rem; }
.session-card {
  background: var(--bg-surface);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.session-card-date { font-weight: 800; font-size: 0.9rem; min-width: 90px; }
.session-card-stats { flex: 1; display: flex; gap: 0.75rem; flex-wrap: wrap; }
.session-card-stat {
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.2rem;
}
.session-card-stat.p { color: var(--color-success); }
.session-card-stat.a { color: var(--color-danger); }
.session-card-stat.l { color: var(--color-warning, #f59e0b); }

/* ── Report Cards ────────────────────────────────────────────── */
.report-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.report-stat-card {
  background: var(--bg-surface);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
}
.report-stat-num { font-size: 1.8rem; font-weight: 900; color: var(--color-primary); line-height: 1; }
.report-stat-label { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.25rem; font-weight: 700; }

/* ── Fee Zalo Overlay ────────────────────────────────────────── */
#fee-zalo-overlay {
  animation: fadeInOverlay 0.18s ease;
}
#fee-zalo-overlay > div {
  animation: slideUpPanel 0.22s ease;
}
@keyframes fadeInOverlay { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUpPanel { from { transform: translateY(40px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ── Mobile responsive ───────────────────────────────────────── */
@media (max-width: 600px) {
  .class-list-grid { grid-template-columns: 1fr; }
  .student-list-table th:nth-child(n+4),
  .student-list-table td:nth-child(n+4) { display: none; }
  /* Thu gọn nút Thao tác trên mobile */
  .fee-table .btn-sm { font-size: 0.72rem; padding: 0.2rem 0.45rem; }
  .fee-table .zalo-send-btn { padding: 0.2rem 0.45rem; font-size: 0.72rem; }
  .att-student-note { display: none; }
}

/* ── Fee Class Groups (accordion) ───────────────────────────── */
.fee-class-group {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 0.45rem;
  overflow: hidden;
}
.fee-class-header {
  display: flex;
  align-items: center;
  padding: 0.65rem 0.9rem;
  cursor: pointer;
  background: var(--bg-surface);
  gap: 0.5rem;
  user-select: none;
  transition: background 0.15s;
}
.fee-class-header:hover { background: var(--bg-surface-hover); }
.fee-group-chevron { flex-shrink: 0; }
.fee-group-body { border-top: 1px solid var(--border-color); }
.fee-group-body .fee-table th:first-child,
.fee-group-body .fee-table td:first-child { padding-left: 0.9rem; }

/* ── Admin Overview Dashboard ────────────────────────────────── */

/* Finance row — compact 4-in-a-row */
.ov-finance-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}
.ov-fin-card {
  display: flex; flex-direction: column;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1.5px solid transparent;
}
.ov-fin-lbl {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--text-main);
  display: flex; align-items: center; gap: 0.3rem;
  line-height: 1.2;
}
.ov-fin-val {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Color modifier classes (shared) */
.ov-stat-primary { border-color: rgba(21,101,192,0.25); background: rgba(21,101,192,0.07); }
.ov-stat-info    { border-color: rgba(6,182,212,0.3);   background: rgba(6,182,212,0.07);  }
.ov-stat-warn    { border-color: rgba(245,158,11,0.3);  background: rgba(245,158,11,0.07); }
.ov-stat-danger  { border-color: rgba(239,68,68,0.3);   background: rgba(239,68,68,0.07);  }
.ov-stat-success { border-color: rgba(34,197,94,0.3);   background: rgba(34,197,94,0.07);  }
.ov-stat-primary .ov-fin-lbl { color: var(--color-primary); }
.ov-stat-info    .ov-fin-lbl { color: #0891b2; }
.ov-stat-warn    .ov-fin-lbl { color: #d97706; }
.ov-stat-danger  .ov-fin-lbl { color: var(--color-danger); }
.ov-stat-success .ov-fin-lbl { color: var(--color-success); }

/* Fee name list rows */
.ov-fee-list {
  margin-top: 0.55rem;
  border-top: 1px solid rgba(0,0,0,0.07);
  padding-top: 0.4rem;
  display: flex; flex-direction: column; gap: 0;
}
.ov-fee-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.28rem 0;
  border-bottom: 1px dashed rgba(0,0,0,0.06);
  font-size: 0.8rem;
}
.ov-fee-row:last-child { border-bottom: none; }
.ov-fee-name { font-weight: 600; color: var(--text-main); flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ov-fee-amt  { font-weight: 800; color: inherit; flex-shrink: 0; margin-left: 0.5rem; font-size: 0.78rem; }
.ov-more-btn {
  display: inline-flex; align-items: center; gap: 0.3rem;
  background: none; border: none; cursor: pointer;
  font-size: 0.73rem; font-weight: 700; color: var(--color-primary);
  padding: 0.25rem 0; margin-top: 0.15rem; transition: opacity 0.15s;
}
.ov-more-btn:hover { opacity: 0.7; }
.ov-tc-more {
  width: 100%;
  justify-content: center;
  font-size: 0.74rem;
  margin-top: 0.35rem;
  padding: 0.2rem 0;
  border-top: 1px dashed var(--border-color);
}

/* Dashboard 4-column grid */
.ov-dashboard-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.85rem;
  margin-top: 1rem;
  align-items: start;
}

/* Revenue chart */
.ov-chart-wrap {
  background: var(--bg-surface);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.ov-chart-header {
  font-size: 0.9rem; font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
  display: flex; align-items: center; gap: 0.4rem;
}
.ov-chart-body {
  position: relative;
  height: 220px;
}

/* Todo panel — vibrant */
.ov-todo-section {
  margin-bottom: 0.75rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--border-color);
  border-left: 3px solid transparent;
  padding-left: 0.5rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.ov-todo-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.ov-todo-title {
  font-size: 0.82rem; font-weight: 800;
  margin-bottom: 0.35rem;
  display: flex; align-items: center; gap: 0.35rem;
}
.ov-todo-cnt {
  margin-left: auto; color: #fff;
  font-size: 0.65rem; padding: 0.1rem 0.45rem;
  border-radius: var(--radius-full); font-weight: 800;
  min-width: 1.1rem; text-align: center;
}
.ov-todo-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.25rem 0.35rem; font-size: 0.78rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.12rem;
  background: rgba(0,0,0,0.025);
}
.ov-todo-name { font-weight: 700; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ov-todo-badge {
  font-size: 0.67rem; font-weight: 800;
  padding: 0.12rem 0.45rem; border-radius: var(--radius-full);
  flex-shrink: 0; margin-left: 0.4rem;
}
.ov-todo-badge.danger { background: #ef4444; color: #fff; }
.ov-todo-badge.warn   { background: #f59e0b; color: #fff; }
.ov-todo-badge.info   { background: #0891b2; color: #fff; }
.ov-todo-ok   { font-size: 0.75rem; color: var(--color-success); font-weight: 700; padding: 0.2rem 0.4rem; background: rgba(34,197,94,0.1); border-radius: var(--radius-sm); display: inline-block; }
.ov-todo-more { font-size: 0.7rem; color: var(--text-muted); font-style: italic; padding: 0.12rem 0.35rem; }
.ov-dash-col {
  background: var(--bg-surface);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  min-height: 180px;
}
.ov-panel { animation: fadeInOverlay 0.2s ease; }

/* Column header inside each panel */
.ov-col-header {
  display: flex; align-items: center; gap: 0.45rem;
  font-size: 0.85rem; font-weight: 800; color: var(--text-main);
  margin-bottom: 0.85rem;
  padding-bottom: 0.6rem;
  border-bottom: 1.5px solid var(--border-color);
}
.ov-col-badge {
  margin-left: auto;
  background: var(--color-primary); color: #fff;
  font-size: 0.68rem; font-weight: 800;
  padding: 0.12rem 0.5rem;
  border-radius: var(--radius-full);
  min-width: 20px; text-align: center;
}
.ov-today-sub { font-size: 0.73rem; color: var(--text-muted); margin-bottom: 0.6rem; margin-top: -0.4rem; }
.ov-teacher-hint-top { font-size: 0.72rem; color: var(--text-muted); margin-bottom: 0.6rem; }

/* Today tab */
.ov-today-header {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.85rem; font-weight: 700; color: var(--text-main);
  margin-bottom: 0.75rem;
}
.ov-today-count {
  margin-left: auto; font-size: 0.75rem;
  background: var(--color-primary); color: #fff;
  padding: 0.15rem 0.6rem; border-radius: var(--radius-full);
}
.ov-class-list { display: flex; flex-direction: column; gap: 0.5rem; }
.ov-class-row {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-surface); border: 1.5px solid var(--border-color);
  border-left: 3px solid #f59e0b;
  border-radius: var(--radius-md); transition: border-color 0.15s;
}
.ov-class-row.ov-class-done {
  border-color: rgba(34,197,94,0.3); background: rgba(34,197,94,0.05);
  border-left: 3px solid #22c55e;
}
.ov-class-name { font-weight: 700; font-size: 0.9rem; margin-bottom: 0.25rem; }
.ov-class-meta { display: flex; flex-wrap: wrap; gap: 0.5rem; font-size: 0.75rem; color: var(--text-muted); }
.ov-att-mini { display: flex; align-items: center; gap: 0.25rem; }
.ov-badge-done  { font-size: 0.75rem; font-weight: 700; color: var(--color-success); white-space: nowrap; }
.ov-badge-pending { font-size: 0.75rem; font-weight: 700; color: var(--text-muted); white-space: nowrap; }
.ov-badge-inprogress { font-size: 0.75rem; font-weight: 700; color: #f59e0b; white-space: nowrap; }
.ov-class-inprogress { border-left: 3px solid #f59e0b; }
.ov-empty {
  display: flex; flex-direction: column; align-items: center;
  gap: 0.5rem; padding: 2.5rem 1rem;
  color: var(--text-muted); font-size: 0.9rem; font-weight: 600;
}
.ov-empty i { font-size: 2rem; opacity: 0.4; }
.ov-loading { padding: 2rem; text-align: center; color: var(--text-muted); font-size: 0.9rem; }
.ov-section-label {
  font-size: 0.75rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: 0.5px; color: var(--text-muted); margin-bottom: 0.6rem;
}

/* Care tab */
.ov-care-section { background: var(--bg-surface); border: 1.5px solid var(--border-color); border-radius: var(--radius-md); padding: 0.85rem 1rem; }
.ov-care-section[data-care="unpaid"] { border-color: rgba(239,68,68,0.3); background: rgba(239,68,68,0.03); }
.ov-care-section[data-care="absent"] { border-color: rgba(245,158,11,0.3); background: rgba(245,158,11,0.03); }
.ov-care-title { font-size: 0.82rem; font-weight: 800; color: var(--text-main); margin-bottom: 0.6rem; display: flex; align-items: center; gap: 0.4rem; }
.ov-care-row { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; padding: 0.5rem 0; border-bottom: 1px solid var(--border-color); }
.ov-care-section[data-care="unpaid"] .ov-care-row { border-bottom-color: rgba(239,68,68,0.15); }
.ov-care-section[data-care="absent"] .ov-care-row { border-bottom-color: rgba(245,158,11,0.15); }
.ov-care-row:last-child { border-bottom: none; }
.ov-care-name { font-weight: 700; font-size: 0.85rem; }
.ov-care-detail { font-size: 0.75rem; color: var(--text-muted); }
.ov-care-right { display: flex; align-items: center; gap: 0.4rem; flex-shrink: 0; }
.ov-care-amount { font-weight: 800; color: var(--color-danger); font-size: 0.9rem; }
.ov-badge-warn { background: rgba(245,158,11,0.15); color: #b45309; font-size: 0.75rem; font-weight: 700; padding: 0.15rem 0.5rem; border-radius: var(--radius-full); }
.ov-empty-small { color: var(--text-muted); font-size: 0.82rem; padding: 0.5rem 0; }

/* Teacher tab */
.ov-teacher-note {
  font-size: 0.78rem; color: var(--text-muted); background: var(--bg-surface);
  border: 1.5px solid var(--border-color); border-radius: var(--radius-md);
  padding: 0.6rem 0.9rem; margin-bottom: 0.75rem;
}
.ov-teacher-grid { display: flex; flex-direction: column; gap: 0.75rem; }
.ov-teacher-card { background: var(--bg-surface); border: 1.5px solid var(--border-color); border-left-width: 3px; border-radius: var(--radius-md); padding: 0.85rem 1rem; }
.ov-teacher-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.6rem; }
.ov-teacher-name { font-weight: 800; font-size: 0.9rem; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.ov-teacher-total { font-size: 0.95rem; font-weight: 900; color: var(--color-primary); flex-shrink: 0; margin-left: 0.4rem; }
.ov-teacher-class-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 0.4rem; padding: 0.35rem 0; border-bottom: 1px dashed var(--border-color); font-size: 0.8rem; }
.ov-teacher-class-row:last-child { border-bottom: none; }
.ov-tc-name { font-weight: 700; flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ov-tc-detail { flex: 0 0 100%; color: var(--text-muted); font-size: 0.72rem; margin-top: -0.05rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ov-tc-amount { flex-shrink: 0; font-weight: 800; color: var(--color-success); text-align: right; }
.ov-teacher-hint { font-size: 0.7rem; color: var(--text-muted); margin-top: 0.5rem; }

/* Student name button */
.stu-name-btn {
  background: none; border: none; padding: 0; cursor: pointer;
  font-weight: 700; font-size: inherit; color: var(--color-primary);
  text-decoration: underline; text-underline-offset: 2px; text-align: left;
}
.stu-name-btn:hover { opacity: 0.75; }

/* Student Attendance History overlay */
.stu-att-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.45); z-index: 1200;
  align-items: center; justify-content: center;
}
.stu-att-overlay.active { display: flex; }
.stu-att-box {
  background: var(--bg-surface-solid); border-radius: var(--radius-lg);
  width: min(540px, 95vw); max-height: 80vh;
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-lg);
}
.stu-att-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.25rem; border-bottom: 1.5px solid var(--border-color);
  font-weight: 800; font-size: 0.95rem;
}
.stu-att-body { overflow-y: auto; padding: 1rem 1.25rem; flex: 1; }
.att-hist-summary { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.att-hist-chip {
  display: inline-flex; align-items: center; gap: 0.3rem;
  padding: 0.3rem 0.65rem; border-radius: var(--radius-full);
  font-size: 0.78rem; font-weight: 700;
}
.att-hist-chip.att-present { background: rgba(34,197,94,0.12); color: #166534; }
.att-hist-chip.att-absent  { background: rgba(239,68,68,0.12);  color: #991b1b; }
.att-history-list { display: flex; flex-direction: column; gap: 0.35rem; }
.att-history-row {
  display: grid; grid-template-columns: 1fr 1fr auto;
  gap: 0.5rem; align-items: center;
  padding: 0.5rem 0.6rem; border-radius: var(--radius-sm);
  background: var(--bg-surface); font-size: 0.8rem;
}
.att-hist-date { font-weight: 600; color: var(--text-muted); font-size: 0.75rem; }
.att-hist-class { font-weight: 700; }
.att-hist-status { font-weight: 800; padding: 0.15rem 0.5rem; border-radius: var(--radius-full); font-size: 0.72rem; text-align: center; }
.att-hist-status.att-present { background: rgba(34,197,94,0.15); color: #166534; }
.att-hist-status.att-absent  { background: rgba(239,68,68,0.15);  color: #991b1b; }
.att-hist-status.att-late    { background: rgba(245,158,11,0.15); color: #92400e; }
.att-hist-status.att-norecord{ background: var(--bg-app); color: var(--text-muted); }
.att-hist-note { grid-column: 1/-1; font-size: 0.72rem; color: var(--text-muted); padding-top: 0.1rem; }

/* Mobile overrides */
@media (max-width: 1100px) {
  .ov-dashboard-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .ov-finance-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .ov-dashboard-grid { grid-template-columns: 1fr; }
  .ov-finance-row { grid-template-columns: repeat(2, 1fr); }
  .ov-class-row { flex-wrap: wrap; gap: 0.5rem; }
  .stu-att-box { max-height: 90vh; width: 97vw; }
  .att-history-row { grid-template-columns: 1fr auto; }
  .att-hist-class { display: none; }
}

/* ── Timetable ────────────────────────────────────────────────── */
.tt-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin-bottom: 0.75rem;
  padding: 0.55rem 0.85rem;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border-color);
}
.tt-legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.79rem;
  font-weight: 700;
  color: var(--text-main);
}
.tt-legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Week navigation */
.tt-week-nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.5rem; margin-bottom: 0.75rem;
  background: var(--bg-surface); border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md); padding: 0.5rem 0.75rem;
}
.tt-nav-btn {
  background: var(--bg-app); border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md); padding: 0.3rem 0.75rem;
  font-size: 0.78rem; font-weight: 700; cursor: pointer; color: var(--text-main);
  transition: background 0.15s;
}
.tt-nav-btn:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.tt-week-label { font-size: 0.82rem; font-weight: 800; color: var(--text-main); text-align: center; }
.tt-day-date { font-size: 0.68rem; font-weight: 600; color: var(--text-muted); margin-top: 0.1rem; }
.tt-today .tt-day-date { color: rgba(255,255,255,0.75); }

/* Session badges on class cards */
.tt-badge-done {
  font-size: 0.6rem; font-weight: 900; color: #fff;
  background: #22c55e; border-radius: var(--radius-full);
  padding: 0.1rem 0.35rem; flex-shrink: 0;
}
.tt-badge-miss {
  font-size: 0.6rem; font-weight: 900; color: #fff;
  background: #ef4444; border-radius: var(--radius-full);
  padding: 0.1rem 0.35rem; flex-shrink: 0;
}

.tt-wrapper { overflow-x: auto; }
.tt-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(120px, 1fr));
  gap: 0.5rem;
  min-width: 700px;
}
.tt-col {
  background: var(--bg-surface);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 120px;
}
.tt-col.tt-today {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(21,101,192,0.12);
}
.tt-day-header {
  display: flex; align-items: center; justify-content: center; gap: 0.35rem;
  font-size: 0.8rem; font-weight: 800;
  padding: 0.5rem 0.6rem;
  background: var(--bg-app);
  border-bottom: 1.5px solid var(--border-color);
  text-align: center;
}
.tt-today .tt-day-header {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.tt-today-badge {
  font-size: 0.6rem; font-weight: 700;
  background: rgba(255,255,255,0.28);
  padding: 0.1rem 0.35rem;
  border-radius: var(--radius-full);
  white-space: nowrap;
}
.tt-slots { padding: 0.45rem; display: flex; flex-direction: column; gap: 0.4rem; }
.tt-empty { text-align: center; color: var(--text-muted); font-size: 0.78rem; padding: 1.25rem 0.5rem; }
.tt-class-card {
  background: var(--bg-app);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.55rem;
}
.tt-today .tt-class-card { border-color: rgba(21,101,192,0.2); background: rgba(21,101,192,0.04); }
.tt-time { font-size: 0.68rem; font-weight: 800; color: var(--color-primary); margin-bottom: 0.2rem; display: flex; align-items: center; gap: 0.25rem; }
.tt-name { font-size: 0.78rem; font-weight: 800; color: var(--text-main); margin-bottom: 0.2rem; line-height: 1.3; }
.tt-teacher { font-size: 0.68rem; color: var(--text-muted); font-weight: 600; display: flex; align-items: center; gap: 0.25rem; }

/* ── Student attendance view toggle ────────────────────────────── */
.att-view-toggle { display: flex; gap: 0.4rem; margin: 0.75rem 0 0.5rem; }
.att-toggle-btn {
  flex: 1; padding: 0.35rem 0.6rem; font-size: 0.78rem; font-weight: 700;
  background: var(--bg-app); border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md); cursor: pointer; color: var(--text-muted);
  transition: all 0.15s;
}
.att-toggle-btn.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ── Student monthly calendar ───────────────────────────────────── */
.att-cal-nav {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 0.5rem;
}
.att-cal-month { font-size: 0.85rem; font-weight: 800; color: var(--text-main); }
.cal-nav-btn {
  background: var(--bg-surface); border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md); padding: 0.25rem 0.6rem;
  font-size: 0.75rem; cursor: pointer; color: var(--text-main);
}
.cal-nav-btn:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.att-cal-legend {
  display: flex; gap: 1rem; font-size: 0.72rem; font-weight: 700;
  color: var(--text-muted); margin-bottom: 0.5rem; align-items: center;
}
.att-cal-legend span { display: flex; align-items: center; gap: 0.3rem; }
.att-cal-grid {
  display: grid; grid-template-columns: repeat(7, 1fr); gap: 3px;
}
.att-cal-hdr {
  font-size: 0.68rem; font-weight: 800; text-align: center;
  color: var(--text-muted); padding: 0.2rem 0;
}
.att-cal-cell {
  position: relative; min-height: 36px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border-radius: var(--radius-sm); border: 1.5px solid transparent;
  font-size: 0.75rem;
}
.att-cal-cell.empty { opacity: 0; pointer-events: none; }
.att-cal-cell.att-cal-has { background: var(--bg-surface); border-color: var(--border-color); }
.att-cal-cell.att-cal-today { border-color: var(--color-primary) !important; }
.att-cal-day { font-weight: 700; font-size: 0.75rem; color: var(--text-main); line-height: 1; }
.att-cal-dot {
  width: 7px; height: 7px; border-radius: 50%; margin-top: 2px; flex-shrink: 0;
}

/* ── Modals for class management ─────────────────────────────── */
#class-modal .modal-box,
#student-modal .modal-box,
#fee-pay-modal .modal-box,
#enroll-modal .modal-box { max-width: 540px; }

.schedule-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}
.schedule-row .form-control { flex: 1; min-width: 80px; }
.btn-remove-schedule {
  background: none;
  border: 1.5px solid var(--color-danger);
  color: var(--color-danger);
  border-radius: var(--radius-sm);
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

/* ── Teacher role note in user management ────────────────────── */
.role-teacher-tag {
  background: #ede9fe;
  color: #5b21b6;
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  font-size: 0.72rem;
  font-weight: 800;
}