/*
 * Music Coach scheduling design system
 * -------------------------------------
 * Implements `docs/design_docs/DESIGN_BRIEF.md` for the web scheduling
 * pages. The design tokens are exposed as CSS custom properties on
 * :root so they can also be reused by the dashboard and any future
 * authenticated app surface.
 *
 * Naming convention:
 *   --mc-*       design tokens (color, radius, shadow, spacing, gradient)
 *   .mc-card     content card on the gradient background
 *   .mc-btn-*    primary/secondary/ghost/danger buttons
 *   .mc-input    text/select input
 *   .mc-badge-*  status badges
 *   .mc-toolbar  page-level inline toolbar (form filters, actions)
 *   .mc-tabnav   underline tab strip (page or in-card section switch)
 *
 * The `mc-` prefix avoids collisions with Bootstrap classes, which
 * we still load globally from CDN.
 */

:root {
  /* Brand blue gradient (DESIGN_BRIEF: Color Palette > Primary). */
  --mc-primary: #1976d2;
  --mc-primary-light: #2196f3;
  --mc-primary-lighter: #64b5f6;
  --mc-primary-dark: #0d47a1;

  /* Status colors (DESIGN_BRIEF: Color Palette > Secondary). */
  --mc-success: #4caf50;
  --mc-success-bg: #e8f5e8;
  --mc-warning: #ff9800;
  --mc-warning-bg: #fff4e5;
  --mc-danger: #f44336;
  --mc-danger-bg: #ffe8e8;
  --mc-info: #42a5f5;
  --mc-info-bg: #e3f2fd;

  /* Text + neutrals. */
  --mc-text-primary: #333;
  --mc-text-secondary: #666;
  --mc-text-muted: #999;
  --mc-border: #e0e6f7;
  --mc-border-translucent: rgba(25, 118, 210, 0.15);
  --mc-card-bg: #ffffff;
  --mc-card-bg-glass: rgba(255, 255, 255, 0.95);

  /* Spacing scale (4 / 8 / 12 / 16 / 20 / 24 / 32). */
  --mc-space-xs: 4px;
  --mc-space-sm: 8px;
  --mc-space-md: 12px;
  --mc-space-base: 16px;
  --mc-space-lg: 20px;
  --mc-space-xl: 24px;
  --mc-space-xxl: 32px;

  /* Radii (mobile uses 16-24 on cards, 18 on buttons; web feels
     better with slightly tighter values). */
  --mc-radius-sm: 8px;
  --mc-radius-md: 12px;
  --mc-radius-lg: 16px;
  --mc-radius-xl: 24px;

  /* Shadows. */
  --mc-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --mc-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --mc-shadow-lg: 0 8px 24px rgba(33, 150, 243, 0.18);
  --mc-shadow-primary: 0 4px 12px rgba(25, 118, 210, 0.30);

  /* Gradients. */
  --mc-gradient-bg: linear-gradient(to bottom, #e3f2fd 0%, #f5f5f5 100%);
  --mc-gradient-primary: linear-gradient(135deg, #1976d2, #2196f3);
  --mc-gradient-primary-soft: linear-gradient(135deg, #2196f3, #64b5f6);
}

/* ---- Cards ----------------------------------------------------------- */

.mc-card {
  background: var(--mc-card-bg);
  border-radius: var(--mc-radius-lg);
  box-shadow: var(--mc-shadow-md);
  padding: var(--mc-space-xl);
  border: 1px solid transparent;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.mc-card--glass {
  background: var(--mc-card-bg-glass);
  backdrop-filter: blur(6px);
}

.mc-card--compact { padding: var(--mc-space-base); }
.mc-card--flush { padding: 0; }
.mc-card-padded { padding: var(--mc-space-xl); }
.mc-card--warning {
  border-left: 4px solid var(--mc-warning);
  background: linear-gradient(to right, #fffbf2, #ffffff 60%);
}

.mc-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--mc-text-primary);
  margin: 0 0 var(--mc-space-base) 0;
  display: flex;
  align-items: center;
  gap: var(--mc-space-sm);
}

.mc-card-subtitle {
  font-size: 0.875rem;
  color: var(--mc-text-secondary);
  margin: 0 0 var(--mc-space-base) 0;
}

/* ---- Page header ---------------------------------------------------- */

.mc-page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--mc-space-base);
  margin-bottom: var(--mc-space-xl);
}

.mc-page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--mc-primary);
  margin: 0 0 var(--mc-space-xs) 0;
  line-height: 1.1;
}

.mc-page-subtitle {
  color: var(--mc-text-secondary);
  font-size: 1rem;
  margin: 0;
}

.mc-page-actions {
  display: flex;
  gap: var(--mc-space-sm);
  flex-wrap: wrap;
}

/* ---- Buttons -------------------------------------------------------- */

.mc-btn-primary,
.mc-btn-secondary,
.mc-btn-ghost,
.mc-btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--mc-space-sm);
  padding: 10px 20px;
  border-radius: var(--mc-radius-md);
  font-weight: 700;
  font-size: 15px;
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.2;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.mc-btn-primary {
  background: var(--mc-gradient-primary);
  color: #fff;
  box-shadow: var(--mc-shadow-primary);
}
.mc-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(25, 118, 210, 0.4);
  color: #fff;
}
.mc-btn-primary:active { transform: translateY(0); }
.mc-btn-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.mc-btn-secondary {
  background: #fff;
  color: var(--mc-primary);
  border-color: var(--mc-border);
}
.mc-btn-secondary:hover {
  background: rgba(33, 150, 243, 0.05);
  border-color: var(--mc-primary);
  color: var(--mc-primary-dark);
}

.mc-btn-compact {
  padding: 4px 12px;
  font-size: 0.8rem;
  font-weight: 600;
}
.mc-remind-form { display: inline; }

.mc-btn-ghost {
  background: transparent;
  color: var(--mc-text-secondary);
  border-color: transparent;
}
.mc-btn-ghost:hover {
  background: rgba(33, 150, 243, 0.05);
  color: var(--mc-primary);
}

.mc-btn-danger {
  background: #fff;
  color: var(--mc-danger);
  border-color: rgba(244, 67, 54, 0.3);
}
.mc-btn-danger:hover {
  background: var(--mc-danger-bg);
  border-color: var(--mc-danger);
  color: var(--mc-danger);
}

.mc-btn-sm {
  padding: 6px 12px;
  font-size: 13px;
  border-radius: var(--mc-radius-sm);
}

/* ---- Inputs --------------------------------------------------------- */

.mc-input,
.mc-select,
.mc-textarea {
  display: block;
  width: 100%;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--mc-text-primary);
  background-color: #fff;
  border: 1.5px solid var(--mc-border);
  border-radius: var(--mc-radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  line-height: 1.4;
}
.mc-input:focus,
.mc-select:focus,
.mc-textarea:focus {
  outline: none;
  border-color: var(--mc-primary);
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.15);
}
.mc-input::placeholder { color: var(--mc-text-muted); }
.mc-textarea { min-height: 80px; resize: vertical; }

.mc-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--mc-text-secondary);
  margin-bottom: var(--mc-space-xs);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.mc-form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--mc-space-base);
  margin-bottom: var(--mc-space-base);
}
.mc-form-row > div { min-width: 0; }
.mc-form-row--full { grid-template-columns: 1fr; }
@media (max-width: 576px) {
  .mc-form-row { grid-template-columns: 1fr; }
}

/* ---- Badges --------------------------------------------------------- */

.mc-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.2;
  background: var(--mc-info-bg);
  color: var(--mc-primary);
}
.mc-badge--success { background: var(--mc-success-bg); color: var(--mc-success); }
.mc-badge--warning { background: var(--mc-warning-bg); color: var(--mc-warning); }
.mc-badge--danger  { background: var(--mc-danger-bg);  color: var(--mc-danger); }
.mc-badge--muted   { background: #eef0f3; color: var(--mc-text-secondary); }

/* ---- Inline page toolbar (filters / actions row) -------------------- */

.mc-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--mc-space-sm);
  align-items: center;
  margin-bottom: var(--mc-space-base);
}
.mc-toolbar .mc-input,
.mc-toolbar .mc-select { max-width: 240px; width: auto; }

/* ---- Tables --------------------------------------------------------- */

.mc-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 14px;
}
.mc-table thead th {
  background: rgba(33, 150, 243, 0.06);
  color: var(--mc-text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 12px;
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--mc-border);
}
.mc-table tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid #f0f3f8;
  color: var(--mc-text-primary);
  vertical-align: top;
}
.mc-table tbody tr:last-child td { border-bottom: 0; }
.mc-table tbody tr:hover td { background: rgba(33, 150, 243, 0.03); }
.mc-table .mc-table-empty {
  text-align: center;
  color: var(--mc-text-muted);
  padding: var(--mc-space-xl);
}

/* ---- Definition lists (key/value detail rows) ----------------------- */

.mc-detail-grid {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--mc-space-sm) var(--mc-space-base);
}
.mc-detail-grid dt {
  font-size: 13px;
  font-weight: 600;
  color: var(--mc-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  align-self: center;
}
.mc-detail-grid dd {
  margin: 0;
  font-size: 15px;
  color: var(--mc-text-primary);
}
@media (max-width: 576px) {
  .mc-detail-grid { grid-template-columns: 1fr; }
  .mc-detail-grid dt { margin-top: var(--mc-space-sm); }
}

/* ---- Modal (Bootstrap) override to match design system -------------- */

.mc-modal .modal-content {
  border: 0;
  border-radius: var(--mc-radius-lg);
  box-shadow: 0 24px 64px rgba(13, 71, 161, 0.18);
  overflow: hidden;
}
.mc-modal .modal-header {
  background: var(--mc-gradient-primary);
  color: #fff;
  border-bottom: 0;
  padding: var(--mc-space-base) var(--mc-space-xl);
}
.mc-modal .modal-header .btn-close { filter: brightness(0) invert(1); opacity: 0.9; }
.mc-modal .modal-title { font-weight: 700; }
.mc-modal .modal-body { padding: var(--mc-space-xl); }
.mc-modal .modal-footer { border-top: 1px solid #f0f3f8; padding: var(--mc-space-base) var(--mc-space-xl); }
.mc-modal .form-check-input:checked { background-color: var(--mc-primary); border-color: var(--mc-primary); }

/* Inline error/info alerts inside the modal body. */
.mc-alert {
  padding: var(--mc-space-md) var(--mc-space-base);
  border-radius: var(--mc-radius-md);
  font-size: 14px;
  margin-bottom: var(--mc-space-base);
}
.mc-alert--danger  { background: var(--mc-danger-bg);  color: var(--mc-danger); }
.mc-alert--info    { background: var(--mc-info-bg);    color: var(--mc-primary); }
.mc-alert--success { background: var(--mc-success-bg); color: var(--mc-success); }
.mc-alert--warning { background: var(--mc-warning-bg); color: var(--mc-warning); }

/* ---- FullCalendar visual integration -------------------------------- */

.fc {
  --fc-border-color: var(--mc-border);
  --fc-today-bg-color: rgba(33, 150, 243, 0.06);
  --fc-now-indicator-color: var(--mc-primary);
  --fc-event-text-color: #fff;
  font-family: inherit;
}

.fc .fc-button-primary {
  background: #fff;
  color: var(--mc-primary);
  border: 1.5px solid var(--mc-border);
  font-weight: 600;
  font-size: 14px;
  padding: 6px 14px;
  border-radius: var(--mc-radius-sm);
  text-transform: capitalize;
  transition: all 0.2s ease;
  box-shadow: none;
}
.fc .fc-button-primary:hover:not(:disabled) {
  background: rgba(33, 150, 243, 0.07);
  color: var(--mc-primary-dark);
  border-color: var(--mc-primary);
}
.fc .fc-button-primary:not(:disabled).fc-button-active,
.fc .fc-button-primary:not(:disabled):active {
  background: var(--mc-gradient-primary);
  color: #fff;
  border-color: var(--mc-primary-dark);
  box-shadow: var(--mc-shadow-primary);
}
.fc .fc-button-primary:focus { box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.18); }
.fc .fc-toolbar-title {
  color: var(--mc-text-primary);
  font-weight: 700;
  font-size: 1.4rem;
}
.fc-event {
  border: 0;
  border-radius: var(--mc-radius-sm);
  padding: 2px 4px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}
.fc-event.fc-event-cancelled {
  text-decoration: line-through;
  opacity: 0.6;
}

/* Past lessons still in `scheduled` status: the provider never marked
   them complete, so they're invisible to billing/reports. Loud border
   + gentle pulse so they can't be mistaken for upcoming lessons. */
.fc-event-needs-completion {
  border: 2px solid #b71c1c !important;
  box-shadow: 0 0 0 2px rgba(229, 57, 53, 0.35);
  font-weight: 700;
  animation: mc-needs-completion-pulse 1.8s ease-in-out infinite;
}
.fc-event-needs-completion:hover {
  animation: none;
}
@keyframes mc-needs-completion-pulse {
  0%, 100% { box-shadow: 0 0 0 2px rgba(229, 57, 53, 0.30); }
  50% { box-shadow: 0 0 0 4px rgba(229, 57, 53, 0.55); }
}
@media (prefers-reduced-motion: reduce) {
  .fc-event-needs-completion { animation: none; }
}
.mc-legend-needs-completion {
  display: inline-block;
  padding: 1px 6px;
  border-radius: var(--mc-radius-sm);
  background: #e53935;
  color: #fff;
  font-weight: 700;
  font-size: 0.85em;
}

/* Cancelled lessons stay visible (grey). The block itself does not
   steal the empty-slot click used to book a replacement (MC-126), but
   the title and time stay clickable so a teacher can open the lesson
   and read the policy countdown (MC-127). */
.fc-event-cancelled {
  opacity: 0.55;
  pointer-events: none;
}
.fc-event-cancelled .fc-event-title,
.fc-event-cancelled .fc-event-time,
.fc-event-cancelled .fc-list-event-title {
  pointer-events: auto;
  cursor: pointer;
}

/* ---- Calendar host card -------------------------------------------- */

.mc-calendar-card { padding: var(--mc-space-base) var(--mc-space-lg); }
.mc-calendar-card .fc { min-height: 70vh; }

/* ---- Lesson-notes editor ------------------------------------------- */

.mc-notes-card {
  border: 1px solid var(--mc-border);
  border-radius: var(--mc-radius-md);
  padding: var(--mc-space-base);
  margin-bottom: var(--mc-space-base);
  background: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.mc-notes-card--missing {
  border-color: rgba(255, 152, 0, 0.45);
  background: #fffbf2;
}
.mc-notes-card--missing .mc-notes-status { color: var(--mc-warning); }

.mc-notes-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--mc-space-sm);
  margin-bottom: var(--mc-space-sm);
}
.mc-notes-header-left {
  display: flex;
  align-items: center;
  gap: var(--mc-space-sm);
  flex-wrap: wrap;
  min-width: 0;
}
.mc-notes-student {
  font-weight: 600;
  color: var(--mc-text-primary);
  font-size: 15px;
  word-break: break-word;
}
.mc-notes-meta {
  font-size: 12px;
  color: var(--mc-text-muted);
}
.mc-notes-status {
  font-size: 12px;
  font-weight: 600;
  color: var(--mc-text-muted);
  white-space: nowrap;
  transition: color 0.2s ease;
}
/* Fresh-save confirmation reads as a green pill (distinct from the
   muted "Last saved …" resting state) so the teacher sees the note
   was stored, not just left in the textarea. */
.mc-notes-status--saved {
  color: var(--mc-success);
  background: var(--mc-success-bg);
  padding: 2px 8px;
  border-radius: 999px;
}
.mc-notes-status--saving { color: var(--mc-info); }
.mc-notes-status--error { color: var(--mc-danger); }

/* Brief green flash on the whole card when a note saves, so the
   confirmation registers even if the status text is out of view. */
@keyframes mcNotesSavedFlash {
  0% {
    border-color: var(--mc-success);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.22);
  }
  100% {
    border-color: var(--mc-border);
    box-shadow: none;
  }
}
.mc-notes-card--just-saved { animation: mcNotesSavedFlash 1.3s ease-out; }
@media (prefers-reduced-motion: reduce) {
  .mc-notes-card--just-saved { animation: none; }
}

.mc-notes-textarea {
  width: 100%;
  min-height: 90px;
  padding: 10px 12px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--mc-text-primary);
  background: #fafbfc;
  border: 1.5px solid var(--mc-border);
  border-radius: var(--mc-radius-sm);
  resize: vertical;
  font-family: inherit;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.mc-notes-textarea:focus {
  outline: none;
  border-color: var(--mc-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.12);
}
.mc-notes-textarea[readonly] { background: #f5f7fa; cursor: default; }

.mc-notes-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--mc-space-sm);
  margin-top: var(--mc-space-sm);
}
.mc-notes-footer-actions {
  display: flex;
  align-items: center;
  gap: var(--mc-space-sm);
}

/* ---- Lesson-note attachments ---------------------------------------- */

.mc-notes-attachments {
  list-style: none;
  margin: 0;
  padding: 0;
}
.mc-notes-attachments:empty { display: none; }
.mc-notes-attachment {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--mc-space-sm);
  padding: 6px 0;
  border-bottom: 1px dashed var(--mc-border);
  font-size: 13px;
}
.mc-notes-attachment:last-child { border-bottom: none; }
.mc-notes-attachment-name {
  color: var(--mc-text-primary);
  word-break: break-all;
  min-width: 0;
}
.mc-notes-attachment-kind { flex-shrink: 0; }
.mc-notes-attachment-thumb-link { flex-shrink: 0; line-height: 0; }
.mc-notes-attachment-thumb {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: var(--mc-radius-sm);
  border: 1px solid var(--mc-border);
  background: #fafbfc;
}
.mc-notes-attachment-audio {
  height: 32px;
  max-width: 260px;
  flex-shrink: 0;
}
.mc-notes-attachment-video {
  width: 200px;
  max-height: 120px;
  border-radius: var(--mc-radius-sm);
  border: 1px solid var(--mc-border);
  background: #000;
  flex-shrink: 0;
}
.mc-notes-attachment-delete {
  margin-left: auto;
  border: none;
  background: transparent;
  color: var(--mc-text-muted);
  font-size: 18px;
  line-height: 1;
  padding: 2px 6px;
  border-radius: var(--mc-radius-sm);
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease;
}
.mc-notes-attachment-delete:hover {
  color: var(--mc-danger);
  background: rgba(244, 67, 54, 0.08);
}

/* ---- Students roster (two-column) ----------------------------------- */

.mc-roster-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--mc-space-lg);
  align-items: start;
}
@media (max-width: 992px) {
  .mc-roster-grid { grid-template-columns: 1fr; }
}

.mc-roster-column { min-width: 0; }
.mc-roster-column .mc-card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--mc-space-sm);
}
.mc-roster-column--scheduled { border-top: 4px solid var(--mc-primary); }
.mc-roster-column--assigned { border-top: 4px solid var(--mc-warning); }

.mc-student-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--mc-space-sm) var(--mc-space-md);
  padding: var(--mc-space-md) 0;
  border-bottom: 1px solid #f0f3f8;
}
.mc-student-row:last-child { border-bottom: 0; }
.mc-student-row:first-child { padding-top: 0; }

.mc-student-name {
  font-weight: 600;
  color: var(--mc-text-primary);
  font-size: 15px;
  text-decoration: none;
  word-break: break-word;
}
.mc-student-name:hover { color: var(--mc-primary); }

.mc-student-email {
  font-size: 12px;
  color: var(--mc-text-muted);
  word-break: break-word;
}

.mc-student-meta {
  font-size: 12px;
  color: var(--mc-text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: var(--mc-space-sm);
  align-items: center;
}
.mc-student-meta .mc-badge { font-size: 11px; padding: 2px 8px; }

.mc-student-actions {
  display: flex;
  gap: var(--mc-space-xs);
  align-items: center;
  justify-content: flex-end;
}

.mc-roster-summary {
  display: flex;
  flex-wrap: wrap;
  gap: var(--mc-space-base);
  margin-bottom: var(--mc-space-lg);
}
.mc-roster-summary > .mc-card {
  flex: 1 1 220px;
  padding: var(--mc-space-base);
  text-align: center;
}
.mc-roster-summary .mc-summary-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--mc-primary);
  display: block;
  line-height: 1.1;
}
.mc-roster-summary .mc-summary-label {
  font-size: 12px;
  color: var(--mc-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

/* ---- Student settings row (teachers / policy / tax) ----------------- */
/*
 * Matches the mobile folder card: white, radius 16, tight padding,
 * stacked content. Three equal columns on desktop, one column on
 * narrow viewports. Every control from the old full-width cards stays.
 */
.mc-settings-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--mc-space-base);
  margin-bottom: var(--mc-space-lg);
  align-items: stretch;
}
@media (max-width: 700px) {
  .mc-settings-row { grid-template-columns: 1fr; }
}
.mc-settings-card {
  display: flex;
  flex-direction: column;
  gap: var(--mc-space-sm);
  min-width: 0;
  padding: var(--mc-space-base) var(--mc-space-lg);
  background: var(--mc-card-bg-glass);
  border-radius: var(--mc-radius-lg);
  box-shadow: var(--mc-shadow-md);
  border: 1px solid var(--mc-border-translucent);
}
.mc-settings-card__title {
  margin: var(--mc-space-xs) 0 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--mc-text-primary);
  letter-spacing: 0;
}
.mc-settings-card__body {
  margin: 0;
  font-size: 13px;
  line-height: 1.45;
  color: var(--mc-text-secondary);
  flex: 1 1 auto;
}
.mc-settings-card__form {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--mc-space-sm);
  margin-top: var(--mc-space-xs);
}
.mc-settings-card__form .mc-input {
  width: 100%;
  max-width: none;
}
.mc-settings-card__form .mc-btn-primary,
.mc-settings-card__form .mc-btn-secondary {
  align-self: flex-start;
}
.mc-settings-card__check {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 0;
  font-size: 13px;
  line-height: 1.35;
  color: var(--mc-text-secondary);
  cursor: pointer;
}
.mc-settings-card__check input {
  margin-top: 2px;
  accent-color: var(--mc-primary);
  flex-shrink: 0;
}
.mc-settings-card__hint {
  margin: 0;
  font-size: 12px;
  line-height: 1.4;
  color: var(--mc-text-muted);
}

/* ---- Filter bar (students roster, future list pages) ---------------- */

.mc-filter-bar {
  background: var(--mc-card-bg);
  border-radius: var(--mc-radius-lg);
  box-shadow: var(--mc-shadow-md);
  padding: var(--mc-space-base) var(--mc-space-lg);
  margin-bottom: var(--mc-space-base);
  border: 1px solid var(--mc-border-translucent);
}
.mc-filter-bar__row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--mc-space-sm);
  align-items: center;
}
.mc-filter-bar__row + .mc-filter-bar__row {
  margin-top: var(--mc-space-sm);
}
.mc-filter-bar__row--toggles { color: var(--mc-text-secondary); font-size: 13px; }
.mc-filter-search {
  flex: 2 1 280px;
  min-width: 200px;
  width: auto;
  max-width: 480px;
}
.mc-filter-select {
  flex: 1 1 180px;
  min-width: 160px;
  width: auto;
  max-width: 240px;
}
.mc-filter-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--mc-space-xs);
  font-weight: 600;
  color: var(--mc-text-secondary);
  font-size: 13px;
  margin: 0;
}
.mc-filter-toggle input { accent-color: var(--mc-primary); }
.mc-filter-result-count {
  margin-left: auto;
  color: var(--mc-text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

/* ---- Roster list table ---------------------------------------------- */

.mc-table-wrapper { overflow-x: auto; }
.mc-table--students { min-width: 720px; }
.mc-table__col-num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  width: 110px;
}
.mc-table__col-name { min-width: 220px; }
.mc-table__col-actions {
  text-align: right;
  width: 1%;
  white-space: nowrap;
}
.mc-table__cell-name { font-weight: 500; }
.mc-table__cell-sub {
  font-size: 11px;
  color: var(--mc-text-muted);
  margin-top: 2px;
}
.mc-text-muted { color: var(--mc-text-muted); }

.mc-student-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 4px;
}
.mc-student-name--no-profile { color: var(--mc-text-secondary); cursor: default; }

.mc-table__col-membership { min-width: 190px; max-width: 240px; }
.mc-membership-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 6px;
}

/* ---- Prepaid-package usage meter ------------------------------------ */

.mc-pack {
  padding: 8px 10px;
  border: 1px solid var(--mc-border, #e4e8ee);
  border-radius: var(--mc-radius-sm, 8px);
  background: #fbfcfe;
  margin-top: 6px;
}
.mc-pack + .mc-pack { margin-top: 8px; }
.mc-pack--exhausted { opacity: 0.72; }

.mc-pack__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}
.mc-pack__name {
  font-weight: 600;
  font-size: 12.5px;
  color: var(--mc-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.mc-pack__count {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--mc-text-primary);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.mc-pack__count-total { font-weight: 500; color: var(--mc-text-muted); }

.mc-pack__meter {
  display: flex;
  height: 7px;
  border-radius: 999px;
  background: #e7ebf1;
  overflow: hidden;
  margin: 6px 0;
}
.mc-pack__seg { height: 100%; }
.mc-pack__seg--consumed  { background: #2e7d32; }
.mc-pack__seg--past      { background: #f0a020; }
.mc-pack__seg--scheduled { background: #8bc78f; }
.mc-pack__seg--over      { background: #c62828; }

.mc-pack__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 3px 12px;
  font-size: 11px;
  color: var(--mc-text-secondary);
}
.mc-pack__stat {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}
.mc-pack__stat b {
  color: var(--mc-text-primary);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.mc-pack__stat--over b { color: #c62828; }
.mc-pack__stat--past b { color: #b9750f; }
.mc-pack__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.mc-pack__dot--consumed  { background: #2e7d32; }
.mc-pack__dot--past      { background: #f0a020; }
.mc-pack__dot--scheduled { background: #8bc78f; }
.mc-pack__dot--free      { background: #cfd6df; }
.mc-pack__dot--over      { background: #c62828; }

.mc-pack__pass {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--mc-text-secondary);
  margin-top: 4px;
}
.mc-pack__pass-expiry { white-space: nowrap; }

/* Student-detail packages: lay meters out in a responsive grid. */
.mc-pack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}

/* ---- Pagination ----------------------------------------------------- */

.mc-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--mc-space-base) var(--mc-space-lg);
  border-top: 1px solid #f0f3f8;
  flex-wrap: wrap;
  gap: var(--mc-space-sm);
}
.mc-pagination__info {
  color: var(--mc-text-secondary);
  font-size: 13px;
}
.mc-pagination__links {
  display: flex;
  gap: var(--mc-space-xs);
}
.mc-btn-disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ---- Student detail: card grid + assignment list -------------------- */

.mc-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--mc-space-lg);
  margin-bottom: var(--mc-space-lg);
}
.mc-cards-grid--two { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
@media (max-width: 992px) {
  .mc-cards-grid--two { grid-template-columns: 1fr; }
}

.mc-assignment-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.mc-assignment-row {
  padding: var(--mc-space-sm) 0;
  border-bottom: 1px solid #f0f3f8;
}
.mc-assignment-row:last-child { border-bottom: 0; }
.mc-assignment-row__title {
  font-weight: 600;
  color: var(--mc-text-primary);
  font-size: 14px;
}
.mc-assignment-row__meta {
  font-size: 12px;
  color: var(--mc-text-muted);
  margin-top: 2px;
}

.mc-notes-card--upcoming {
  background: rgba(33, 150, 243, 0.04);
  border-color: var(--mc-border-translucent);
}
.mc-notes-card--upcoming .mc-notes-status { color: var(--mc-primary); }

.mc-notes-preview {
  margin: 0 0 var(--mc-space-sm);
  padding: var(--mc-space-sm) var(--mc-space-md);
  background: #f5f7fa;
  border-radius: var(--mc-radius-sm);
  font-size: 14px;
  line-height: 1.45;
  color: var(--mc-text-primary);
}

/* "Day" group header on the lesson-notes hub. */
.mc-notes-day-group { margin-bottom: var(--mc-space-xl); }
.mc-notes-day-header {
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--mc-text-secondary);
  margin: 0 0 var(--mc-space-sm) 0;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--mc-border);
}

/* --- Note-log search (student notes history) ------------------------ */

.mc-notes-search {
  display: flex;
  gap: var(--mc-space-sm);
  align-items: center;
  flex-wrap: wrap;
}
.mc-notes-search .mc-input { flex: 1 1 260px; }

.mc-visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.mc-help-text {
  font-size: 13px;
  color: var(--mc-text-muted);
  margin: 0 0 var(--mc-space-md) 0;
}

.mc-notes-log { list-style: none; margin: 0; padding: 0; }
.mc-notes-log-entry {
  padding: var(--mc-space-md) 0;
  border-bottom: 1px solid var(--mc-border);
}
.mc-notes-log-entry:last-child { border-bottom: 0; }
.mc-notes-log-meta {
  font-size: 12px;
  color: var(--mc-text-muted);
  margin-bottom: 4px;
}
.mc-notes-log-body { white-space: pre-wrap; }

/* --- Continuous notes sheet (MC-137) -------------------------------- */

.mc-notes-sheet-card { overflow: visible; }
.mc-notes-sheet-wrap {
  overflow-x: auto;
  margin: 0 calc(-1 * var(--mc-space-lg, 1rem));
  padding: 0 var(--mc-space-lg, 1rem);
}
.mc-notes-sheet {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}
.mc-notes-sheet thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--mc-surface, #fff);
  border-bottom: 2px solid var(--mc-border);
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--mc-text-muted);
  padding: 10px 12px;
}
.mc-notes-sheet__row td {
  vertical-align: top;
  padding: 14px 12px;
  border-bottom: 1px solid var(--mc-border);
}
.mc-notes-sheet__row:last-child td { border-bottom: 0; }
.mc-notes-sheet__date { width: 7.5rem; }
.mc-notes-sheet__lesson { width: 9.5rem; }
.mc-notes-sheet__files { width: 9rem; }
.mc-notes-sheet__date,
.mc-notes-sheet__lesson {
  overflow: hidden;
}
.mc-notes-sheet__date-main {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 600;
  color: var(--mc-text-primary);
  line-height: 1.3;
}
.mc-notes-sheet__lesson a {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 500;
  color: var(--mc-primary);
  text-decoration: none;
}
.mc-notes-sheet__lesson a:hover { text-decoration: underline; }
.mc-notes-sheet__body {
  font-size: 15px;
  line-height: 1.45;
  color: var(--mc-text-primary);
  white-space: pre-wrap;
  word-break: break-word;
}
.mc-notes-sheet__attach-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 12px;
  line-height: 1.4;
}
.mc-notes-sheet__attach-list li {
  overflow: hidden;
}
.mc-notes-sheet__attach-list li + li { margin-top: 4px; }
.mc-notes-sheet__attach-list a {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--mc-primary);
  text-decoration: none;
}
.mc-notes-sheet__attach-list a:hover { text-decoration: underline; }
.mc-notes-sheet__row--general .mc-notes-sheet__date-main {
  font-weight: 500;
}

.mc-notes-compose { margin-top: var(--mc-space-lg, 1.25rem); }
.mc-notes-compose__form { display: flex; flex-direction: column; gap: 12px; }
.mc-notes-compose__label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--mc-text-secondary);
  margin-bottom: 6px;
}
.mc-notes-compose__body {
  min-height: 96px;
  resize: vertical;
  font-size: 15px;
  line-height: 1.45;
}
.mc-notes-compose__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.mc-notes-compose__field { flex: 0 0 auto; min-width: 10rem; }
.mc-notes-compose__field--grow { flex: 1 1 16rem; }
.mc-notes-compose__footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.mc-notes-compose__hint { margin: 0; flex: 1 1 14rem; }

@media (max-width: 720px) {
  .mc-notes-sheet__date,
  .mc-notes-sheet__lesson,
  .mc-notes-sheet__files { width: auto; }
  .mc-notes-sheet thead { display: none; }
  .mc-notes-sheet,
  .mc-notes-sheet tbody,
  .mc-notes-sheet tr,
  .mc-notes-sheet td {
    display: block;
    width: 100%;
  }
  .mc-notes-sheet__row td {
    padding: 4px 0;
    border-bottom: 0;
  }
  .mc-notes-sheet__row {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--mc-border);
  }
  .mc-notes-sheet__row:last-child { border-bottom: 0; }
  .mc-notes-sheet__note { padding-top: 8px !important; }
}

/* --- Tab nav (shared with invoicing page chrome) ------------------- */

.mc-tabnav {
  display: flex;
  gap: 4px;
  margin: 0 0 var(--mc-space-xl) 0;
  border-bottom: 1px solid var(--mc-border);
}
.mc-tabnav a,
.mc-tabnav button {
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
  padding: 10px 14px;
  color: var(--mc-text-secondary);
  font: inherit;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
}
.mc-tabnav a:hover,
.mc-tabnav button:hover {
  color: var(--mc-text-primary);
}
.mc-tabnav a.active,
.mc-tabnav button.active {
  color: var(--mc-text-primary);
  border-bottom-color: var(--mc-primary-light);
  font-weight: 600;
}

/* Full-width segmented tabs (in-card Past / Upcoming). */
.mc-tabnav--full {
  gap: var(--mc-space-xs);
  padding: var(--mc-space-xs);
  border-bottom: 0;
  background: rgba(25, 118, 210, 0.06);
  border-radius: var(--mc-radius-md);
}
.mc-tabnav--full a,
.mc-tabnav--full button {
  flex: 1 1 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin-bottom: 0;
  border-bottom: 0;
  border-radius: var(--mc-radius-sm);
  padding: 10px 12px;
  color: var(--mc-text-secondary);
  font-weight: 500;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.mc-tabnav--full a:hover,
.mc-tabnav--full button:hover {
  color: var(--mc-primary);
  background: rgba(255, 255, 255, 0.55);
}
.mc-tabnav--full a.active,
.mc-tabnav--full button.active {
  background: var(--mc-gradient-primary);
  color: #fff;
  font-weight: 600;
  box-shadow: var(--mc-shadow-primary);
}
.mc-tabnav--full a.active:hover,
.mc-tabnav--full button.active:hover {
  color: #fff;
  background: var(--mc-gradient-primary);
}

.mc-tabpanel[hidden] { display: none; }

/* Studio TV leaderboard (MC-145). */
.mc-leaderboard-tv__title {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
}
.mc-leaderboard-tv__subtitle {
  font-size: 1.05rem;
}
.mc-leaderboard-tv__tabs {
  margin-bottom: var(--mc-space-lg);
}
.mc-leaderboard-tv__layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  gap: var(--mc-space-lg);
  align-items: start;
}
@media (max-width: 900px) {
  .mc-leaderboard-tv__layout {
    grid-template-columns: 1fr;
  }
}
.mc-leaderboard-tv__board {
  padding: var(--mc-space-xl);
}
.mc-leaderboard-tv__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--mc-space-sm);
}
.mc-leaderboard-tv__row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--mc-space-base);
  padding: 14px 18px;
  border-radius: var(--mc-radius-md);
  background: rgba(25, 118, 210, 0.04);
}
.mc-leaderboard-tv__row--top {
  background: linear-gradient(90deg, rgba(255, 193, 7, 0.18), rgba(25, 118, 210, 0.06));
}
.mc-leaderboard-tv__rank {
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: 700;
  color: var(--mc-primary-dark);
  min-width: 3.5rem;
}
.mc-leaderboard-tv__rank--small {
  font-size: 1.1rem;
  min-width: auto;
  margin-right: 0.35rem;
}
.mc-leaderboard-tv__alias {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 600;
  color: var(--mc-text-primary);
}
.mc-leaderboard-tv__identity {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}
.mc-leaderboard-tv__name {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 700;
  color: var(--mc-text-primary);
}
.mc-leaderboard-tv__alias--secondary {
  font-size: clamp(0.85rem, 1.2vw, 1rem);
  font-weight: 500;
  color: var(--mc-text-secondary);
}
.mc-leaderboard-tv__score {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  font-weight: 600;
  color: var(--mc-text-secondary);
  white-space: nowrap;
}
.mc-leaderboard-tv__score--small {
  font-size: 0.95rem;
  font-weight: 500;
}
.mc-leaderboard-tv__empty {
  margin: 0;
  font-size: 1.15rem;
  color: var(--mc-text-secondary);
  text-align: center;
  padding: var(--mc-space-xl) 0;
}
.mc-leaderboard-tv__aside {
  display: flex;
  flex-direction: column;
  gap: var(--mc-space-base);
}
.mc-leaderboard-tv__challenges,
.mc-leaderboard-tv__winners {
  padding: var(--mc-space-lg);
}
.mc-leaderboard-tv__challenge-list,
.mc-leaderboard-tv__winner-list {
  list-style: none;
  margin: var(--mc-space-base) 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--mc-space-sm);
}
.mc-leaderboard-tv__challenge {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 1rem;
}
.mc-leaderboard-tv__challenge-target {
  color: var(--mc-text-secondary);
  font-size: 0.95rem;
}
.mc-leaderboard-coach-widget {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 12px 16px;
  margin-bottom: var(--mc-space-base);
  background: rgba(25, 118, 210, 0.06);
  border: 1px solid rgba(25, 118, 210, 0.12);
}
.mc-leaderboard-coach-widget__label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--mc-text-secondary);
}
.mc-leaderboard-coach-widget__value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--mc-text-primary);
}