:root {
  --ink: #14161a;
  --ink-soft: #52565f;
  --paper: #ffffff;
  --paper-dim: #f5f5f4;
  --line: #e3e2df;
  --line-strong: #cfcecb;
  --accent-green: #2f8f5b;
  --accent-green-bg: #e9f5ee;
  --accent-orange: #c9741f;
  --accent-orange-bg: #fbf0e4;
  --accent-red: #c23b3b;
  --accent-red-bg: #fbebeb;
  --radius: 10px;
  --font-ui: 'Inter', 'Noto Sans TC', system-ui, sans-serif;
  --font-cjk: 'Noto Sans TC', 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-cjk);
  color: var(--ink);
  background: var(--paper-dim);
  -webkit-font-smoothing: antialiased;
}

/* ---------- Login screen ---------- */
#loginScreen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px 32px;
}

.login-mark {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 4px;
}

.login-sub {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0 0 28px;
}

.field { margin-bottom: 16px; }

.field label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.field input {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
}

.field input:focus { outline: none; border-color: var(--ink); }

.btn-primary {
  width: 100%;
  padding: 11px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  color: var(--paper);
  background: var(--ink);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 8px;
}

.btn-primary:hover { background: #2a2d33; }
.btn-primary:disabled { background: var(--line-strong); cursor: default; }

.btn-danger {
  width: 100%;
  padding: 11px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  color: var(--accent-red);
  background: var(--paper);
  border: 1px solid var(--accent-red);
  border-radius: 6px;
  cursor: pointer;
  margin-top: 10px;
}
.btn-danger:hover { background: var(--accent-red-bg); }

.login-error {
  font-size: 13px;
  color: var(--accent-red);
  margin-top: 14px;
  display: none;
}

/* ---------- App shell ---------- */
#appScreen { display: none; min-height: 100vh; }

header.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--ink-soft);
}

.btn-ghost {
  font-family: inherit;
  font-size: 13px;
  color: var(--ink-soft);
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
}
.btn-ghost:hover { color: var(--ink); border-color: var(--ink); }

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 28px 80px;
}

.page-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.page-head h1 { font-size: 20px; font-weight: 600; margin: 0; }

.page-head .count {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--ink-soft);
}

.search-row {
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.search-row input {
  width: 100%;
  max-width: 320px;
  padding: 9px 12px;
  font-size: 14px;
  font-family: inherit;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
}
.search-row input:focus { outline: none; border-color: var(--ink); }

.btn-inline { width: auto; margin-top: 0; padding: 9px 16px; white-space: nowrap; }

/* ---------- Add student modal ---------- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(20, 22, 26, 0.4);
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}
.modal-overlay.open { display: flex; }

.modal-card {
  width: 100%;
  max-width: 400px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--paper);
  border-radius: var(--radius);
  padding: 28px 28px 32px;
}

.modal-card-wide { max-width: 640px; }

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-head h2 { font-size: 17px; font-weight: 700; margin: 0; }

.modal-close {
  font-size: 20px;
  line-height: 1;
  color: var(--ink-soft);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.modal-close:hover { color: var(--ink); }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field select {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
}
.field select:focus { outline: none; border-color: var(--ink); }

.package-remaining-hint {
  font-size: 12px;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  margin: 6px 0 0;
}
.package-remaining-hint.over-limit { color: var(--accent-red); font-weight: 600; }

.btn-full-width {
  width: 100%;
  padding: 11px;
  margin-top: 10px;
}

.cr-timing-info {
  font-size: 13px;
  font-family: var(--font-ui);
  padding: 10px 12px;
  border-radius: 6px;
  margin: -4px 0 18px;
}
.cr-timing-info.free { background: var(--accent-green-bg); color: var(--accent-green); }
.cr-timing-info.charged { background: var(--accent-red-bg); color: var(--accent-red); }

.cr-shift-note {
  font-size: 12px;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  margin: -6px 0 16px;
}

.billing-switch-warning {
  font-size: 12.5px;
  color: var(--accent-orange);
  background: var(--accent-orange-bg);
  border-radius: 6px;
  padding: 8px 10px;
  margin: -6px 0 16px;
  display: none;
}
.billing-switch-warning.show { display: block; }

.batch-rows {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 16px 0 20px;
  max-height: 320px;
  overflow-y: auto;
}

.batch-row {
  display: grid;
  grid-template-columns: 56px 1fr 1fr 1fr;
  gap: 8px;
  align-items: center;
}

.batch-row-index {
  font-family: var(--font-ui);
  font-size: 11.5px;
  color: var(--ink-soft);
  white-space: nowrap;
}

.batch-row input {
  padding: 7px 9px;
  font-size: 12.5px;
  font-family: inherit;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
  width: 100%;
}
.batch-row input:focus { outline: none; border-color: var(--ink); }

@media (max-width: 640px) {
  .batch-row { grid-template-columns: 1fr; }
  .batch-row-index { margin-bottom: -4px; }
}

.student-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.student-row {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--paper);
  padding: 16px 18px;
  cursor: pointer;
}
.student-row:hover { background: var(--paper-dim); }

.student-name { font-weight: 600; font-size: 15px; min-width: 96px; }

.student-meta {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  font-size: 12.5px;
  color: var(--ink-soft);
  font-family: var(--font-ui);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 100px;
  font-size: 11.5px;
  font-weight: 600;
  font-family: var(--font-ui);
  white-space: nowrap;
}

.badge-package { background: var(--accent-green-bg); color: var(--accent-green); }
.badge-monthly { background: var(--accent-orange-bg); color: var(--accent-orange); }

.empty-state, .error-state, .loading-state {
  text-align: center;
  padding: 64px 20px;
  color: var(--ink-soft);
  font-size: 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-state { color: var(--accent-red); }

/* ---------- Detail view ---------- */
#detailView { display: none; }
#billingView { display: none; }
#remindersView { display: none; }
#calendarView { display: none; }

.cal-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.cal-nav-label {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 14px;
  min-width: 90px;
  text-align: center;
}

.cal-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 24px;
  align-items: start;
}

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
}

.cal-weekday {
  text-align: center;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-soft);
  padding-bottom: 6px;
}

.cal-cell {
  aspect-ratio: 1 / 1;
  min-height: 56px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 4px;
  padding: 6px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

.cal-cell-empty { cursor: default; }
.cal-cell:not(.cal-cell-empty):hover { background: var(--paper-dim); }

.cal-cell-today { border-color: var(--ink); }
.cal-cell-selected { background: var(--paper-dim); border-color: var(--ink); }

.cal-day-num {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
}

.cal-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}

.cal-dot {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 700;
  border-radius: 100px;
  padding: 1px 5px;
  line-height: 1.4;
}
.dot-scheduled { background: var(--accent-orange-bg); color: var(--accent-orange); }
.dot-completed { background: var(--accent-green-bg); color: var(--accent-green); }
.dot-cancelled { background: var(--paper-dim); color: var(--ink-soft); }

.cal-day-list-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  margin: 0 0 12px;
}

.cal-day-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.cal-day-item {
  background: var(--paper);
  padding: 12px 14px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
}
.cal-day-item:hover { background: var(--paper-dim); }

.cal-day-item-time {
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--ink-soft);
  min-width: 44px;
  white-space: nowrap;
  padding-top: 1px;
}

.cal-day-item-duration {
  display: block;
  font-size: 10px;
  color: var(--line-strong);
  margin-top: 2px;
}

.cal-day-item-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cal-day-item-name { font-size: 13.5px; font-weight: 600; }
.cal-day-item-content {
  font-size: 12px;
  color: var(--ink-soft);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cal-join-btn {
  flex-shrink: 0;
  font-family: var(--font-ui);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--accent-green);
  background: var(--accent-green-bg);
  border-radius: 100px;
  padding: 4px 10px;
  text-decoration: none;
  white-space: nowrap;
}
.cal-join-btn:hover { background: var(--accent-green); color: var(--paper); }

.cal-complete-btn {
  flex-shrink: 0;
  font-family: var(--font-ui);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 100px;
  padding: 4px 10px;
  cursor: pointer;
  white-space: nowrap;
}
.cal-complete-btn:hover { color: var(--ink); border-color: var(--ink); }
.cal-complete-btn:disabled { opacity: 0.5; cursor: default; }

@media (max-width: 720px) {
  .cal-layout { grid-template-columns: 1fr; }
  .cal-cell { min-height: 44px; }
  .cal-day-item { flex-wrap: wrap; }
  .cal-day-item-body { min-width: 140px; }
}

.reminders-intro {
  font-size: 13px;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  margin: -8px 0 24px;
  max-width: 520px;
}

.reminder-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.reminder-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.reminder-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.reminder-name { font-weight: 600; font-size: 15px; }

.reminder-days {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-orange);
  background: var(--accent-orange-bg);
  padding: 2px 9px;
  border-radius: 100px;
  white-space: nowrap;
}
.reminder-days.urgent { color: var(--accent-red); background: var(--accent-red-bg); }

.reminder-meta {
  display: flex;
  gap: 14px;
  font-size: 12.5px;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  margin-bottom: 10px;
}

.reminder-reasons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.reminder-reason-tag {
  font-size: 11.5px;
  font-family: var(--font-ui);
  color: var(--ink-soft);
  background: var(--paper-dim);
  border: 1px solid var(--line);
  border-radius: 100px;
  padding: 3px 10px;
}

.billing-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

.billing-controls input[type="month"] {
  padding: 9px 12px;
  font-size: 14px;
  font-family: inherit;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
}
.billing-controls input[type="month"]:focus { outline: none; border-color: var(--ink); }

.revenue-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 28px;
}

.revenue-summary-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  font-family: var(--font-ui);
}

.revenue-summary-totals {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.revenue-summary-amount {
  font-family: var(--font-ui);
  font-size: 22px;
  font-weight: 700;
  color: var(--accent-green);
}
.revenue-summary-amount.empty {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
}

.billing-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.billing-table-head,
.billing-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr 1.2fr;
  gap: 10px;
  padding: 12px 18px;
  align-items: center;
}

.billing-table-head {
  background: var(--paper-dim);
  font-family: var(--font-ui);
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
}

.billing-row {
  background: var(--paper);
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  cursor: pointer;
}
.billing-row:hover { background: var(--paper-dim); }

.billing-expand-hint {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-soft);
}

.billing-detail {
  background: var(--paper-dim);
  border-top: 1px solid var(--line);
  padding: 4px 18px 10px 18px;
}

.billing-detail-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
  font-size: 12.5px;
  border-bottom: 1px solid var(--line);
}
.billing-detail-row:last-child { border-bottom: none; }

.billing-detail-date {
  font-family: var(--font-ui);
  color: var(--ink-soft);
  min-width: 96px;
  white-space: nowrap;
}

.billing-detail-note {
  color: var(--ink-soft);
  flex: 1;
  min-width: 0;
}

.billing-row-empty { color: var(--line-strong); }
.billing-row-empty .billing-name { color: var(--ink-soft); }

.billing-name { font-weight: 600; }
.billing-total {
  font-family: var(--font-ui);
  font-weight: 700;
  color: var(--ink);
}

@media (max-width: 640px) {
  .billing-table-head { display: none; }
  .billing-row {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "name name"
      "completed cancelled"
      "unit total";
    row-gap: 4px;
  }
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-bottom: 20px;
}
.back-link:hover { color: var(--ink); }

.detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 4px;
}

.detail-header h1 { font-size: 22px; font-weight: 700; margin: 0; }

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  font-size: 12.5px;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  margin-bottom: 28px;
}

.meet-link-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 11.5px;
  font-weight: 600;
  font-family: var(--font-ui);
  background: var(--accent-green-bg);
  color: var(--accent-green);
  text-decoration: none;
}
.meet-link-badge:hover { background: var(--accent-green); color: var(--paper); }

.section-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  margin: 0 0 12px;
}

.section-head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.section-head-row .section-title { margin-bottom: 0; }

.expires-preview {
  font-size: 12.5px;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  margin: -8px 0 16px;
}

.package-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 32px;
}

.history-toggle {
  display: block;
  font-family: var(--font-ui);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-soft);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  margin: -20px 0 16px;
}
.history-toggle:hover { color: var(--ink); }

.package-history { margin-bottom: 32px; }

.package-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  position: relative;
  cursor: pointer;
}
.package-card:hover { border-color: var(--ink); }

.pkg-edit-hint {
  display: block;
  font-family: var(--font-ui);
  font-size: 11px;
  color: var(--ink-soft);
  text-align: right;
  margin-top: 12px;
}
.package-card:hover .pkg-edit-hint { color: var(--ink); }

.package-card.active { border-color: var(--accent-green); }

.package-card .pkg-status {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-ui);
  padding: 2px 8px;
  border-radius: 100px;
}
.pkg-status.active { background: var(--accent-green-bg); color: var(--accent-green); }
.pkg-status.expired { background: var(--paper-dim); color: var(--ink-soft); }

.pkg-remaining {
  font-family: var(--font-ui);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  margin: 4px 0 2px;
}
.pkg-remaining span { font-size: 13px; font-weight: 500; color: var(--ink-soft); }

.pkg-row {
  font-size: 12.5px;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  margin-top: 10px;
  display: flex;
  justify-content: space-between;
}

.pkg-row-forfeited {
  color: var(--accent-red);
  font-weight: 600;
}

.pkg-grace-tag {
  font-size: 10.5px;
  color: var(--accent-orange);
  font-weight: 600;
}

.monthly-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 32px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.monthly-card .big { font-family: var(--font-ui); font-size: 28px; font-weight: 700; }
.monthly-card .label { font-size: 13px; color: var(--ink-soft); }

.lesson-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.lesson-row {
  background: var(--paper);
  padding: 14px 18px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.lesson-date {
  font-family: var(--font-ui);
  font-size: 12.5px;
  color: var(--ink-soft);
  min-width: 128px;
  white-space: nowrap;
  padding-top: 2px;
}

.lesson-duration {
  display: block;
  font-size: 10.5px;
  color: var(--line-strong);
  margin-top: 2px;
}

.lesson-body { flex: 1; min-width: 0; }

.lesson-content { font-size: 14px; margin-bottom: 4px; }
.lesson-content:empty::before {
  content: '（尚未填寫課程內容）';
  color: var(--line-strong);
}

.lesson-sub {
  font-size: 12px;
  color: var(--ink-soft);
  font-family: var(--font-ui);
}
.lesson-sub a { color: inherit; }

.lesson-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.lesson-filters {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.lesson-filters input[type="text"] {
  flex: 1;
  min-width: 160px;
  padding: 8px 12px;
  font-size: 13px;
  font-family: inherit;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
}

.lesson-filters input[type="date"] {
  padding: 7px 10px;
  font-size: 13px;
  font-family: inherit;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
}

.lesson-filters input:focus { outline: none; border-color: var(--ink); }

.lesson-filter-label {
  font-size: 12.5px;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  white-space: nowrap;
}

.bulk-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.bulk-select-all {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-family: var(--font-ui);
  color: var(--ink-soft);
  cursor: pointer;
}
.bulk-select-all input { cursor: pointer; }

.btn-danger.btn-inline {
  width: auto;
  padding: 7px 14px;
  margin-top: 0;
  font-size: 12.5px;
}
.btn-danger.btn-inline:disabled {
  color: var(--line-strong);
  border-color: var(--line);
  cursor: default;
}

.lesson-row-checkbox {
  flex-shrink: 0;
  cursor: pointer;
}

.lesson-row { cursor: pointer; }
.lesson-row:hover { background: var(--paper-dim); }

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-ui);
  white-space: nowrap;
  flex-shrink: 0;
}
.status-SCHEDULED { background: var(--accent-orange-bg); color: var(--accent-orange); }
.status-COMPLETED { background: var(--accent-green-bg); color: var(--accent-green); }
.status-CANCELLED_CHARGED { background: var(--accent-red-bg); color: var(--accent-red); }
.status-CANCELLED_FREE { background: var(--paper-dim); color: var(--ink-soft); }

@media (max-width: 560px) {
  main { padding: 24px 16px 60px; }
  header.topbar { padding: 14px 16px; }
  .student-row { flex-direction: column; align-items: flex-start; gap: 8px; }
  .student-name { min-width: 0; }
  .lesson-row { flex-direction: column; gap: 6px; }
  .lesson-date { min-width: 0; }
}