body { background: var(--bg); }

#panel-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.panel-header-inner { display: flex; align-items: center; gap: 18px; padding: 14px 0; }
.panel-nav { display: flex; gap: 6px; margin-left: 12px; }
.panel-nav a {
  color: var(--muted); text-decoration: none; font-size: 13.5px; font-weight: 700;
  padding: 8px 12px; border-radius: 10px;
}
.panel-nav a.active, .panel-nav a:hover { background: var(--primary-tint); color: var(--primary); }
.panel-logout-btn {
  margin-left: auto; background: none; border: 1px solid var(--line); border-radius: 10px;
  padding: 8px 14px; font-family: var(--font); font-weight: 700; font-size: 13px; color: var(--muted); cursor: pointer;
}
.panel-logout-btn:hover { border-color: var(--bad, #c0392b); color: #c0392b; }

.panel-main { padding: 28px 0 60px; }
.panel-title-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; flex-wrap: wrap; }
.panel-title-row h1 { font-size: 22px; margin: 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 18px; border-radius: 12px; border: none; font-family: var(--font);
  font-size: 14px; font-weight: 700; cursor: pointer; text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-ghost { background: var(--primary-tint); color: var(--primary); }
.btn-danger { background: #fdecea; color: #c0392b; }
.btn:disabled { opacity: 0.5; cursor: default; }

input, select, textarea {
  width: 100%; font-family: var(--font); font-size: 14px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 10px; color: var(--text); background: var(--surface);
}
label.field-label { display: block; font-size: 12px; font-weight: 700; color: var(--muted); margin: 0 0 6px; }
.field { margin-bottom: 12px; }

table.data-table { width: 100%; border-collapse: collapse; }
table.data-table th, table.data-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); font-size: 13.5px; }
table.data-table th { color: var(--muted); font-weight: 700; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.4px; }
table.data-table tr:hover td { background: var(--primary-tint); cursor: pointer; }

.status-badge { display: inline-flex; padding: 3px 10px; border-radius: 999px; font-size: 11.5px; font-weight: 700; }
.status-upcoming { background: var(--primary-tint); color: var(--primary); }
.status-done { background: #e6f6ec; color: #1e8a4c; }
.status-absent { background: #fdecea; color: #c0392b; }
.status-instructor_absent { background: #fff7e6; color: #8a5a00; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(12,26,38,0.45); display: flex;
  align-items: flex-start; justify-content: center; padding: 40px 16px; overflow-y: auto; z-index: 50;
}
.modal-card { background: var(--surface); border-radius: var(--radius); padding: 24px; max-width: 480px; width: 100%; }
.modal-card h2 { margin-top: 0; font-size: 18px; }

.error-text { color: #c0392b; font-size: 13px; margin: 8px 0 0; }
.muted-text { color: var(--muted); font-size: 13px; }

.week-grid { display: grid; grid-template-columns: 60px repeat(7, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.week-grid .cell { border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); padding: 6px; min-height: 46px; font-size: 11.5px; }
.week-grid .head { font-weight: 800; text-align: center; padding: 10px 6px; background: var(--surface); }
.week-grid .hour-label { color: var(--muted); font-size: 11px; text-align: right; padding-right: 8px; }
.week-lesson { background: var(--primary-tint); border-left: 3px solid var(--primary); border-radius: 6px; padding: 4px 6px; font-size: 10.5px; cursor: pointer; }
.week-lesson.done { background: #e6f6ec; border-left-color: #1e8a4c; }
.week-lesson.absent { background: #fdecea; border-left-color: #c0392b; }
.week-lesson.instructor_absent { background: #fff7e6; border-left-color: #8a5a00; }

@media (max-width: 760px) {
  .week-grid { font-size: 10px; }
  .panel-nav a { padding: 6px 8px; font-size: 12px; }
}