:root {
  --summer-bg: #f3f6fb;
  --summer-panel: rgba(255, 255, 255, 0.96);
  --summer-line: rgba(31, 42, 68, 0.12);
  --summer-ink: #172033;
  --summer-muted: #66718d;
  --summer-blue: #2563eb;
  --summer-blue-dark: #1d4ed8;
  --summer-green: #11815e;
  --summer-amber: #b7791f;
  --summer-red: #b42318;
  --summer-shadow: 0 22px 64px rgba(34, 45, 75, 0.11);
  --summer-radius: 8px;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  color: var(--summer-ink);
  background:
    linear-gradient(180deg, #f9fbff 0%, var(--summer-bg) 100%);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.summer-shell {
  width: min(1680px, calc(100vw - 28px));
  margin: 18px auto 30px;
  display: grid;
  gap: 16px;
}

.summer-toolbar,
.summer-editor,
.summer-calendar-panel {
  background: var(--summer-panel);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--summer-radius);
  box-shadow: var(--summer-shadow);
}

.summer-toolbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
}

.summer-toolbar-title {
  display: grid;
  gap: 4px;
}

.summer-toolbar-title span,
.summer-editor-head span {
  color: var(--summer-muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.summer-toolbar-title strong {
  font-size: 24px;
}

.summer-toolbar-controls {
  display: grid;
  grid-template-columns: 170px 210px auto;
  gap: 12px;
  align-items: end;
}

.summer-toolbar-controls label,
.summer-form label {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.summer-toolbar-controls label span,
.summer-form label span {
  color: var(--summer-muted);
  font-size: 13px;
  font-weight: 800;
}

.summer-toolbar select,
.summer-form input,
.summer-form select,
.summer-form textarea {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid #cad4e6;
  border-radius: var(--summer-radius);
  background: #fff;
  color: var(--summer-ink);
  font: inherit;
  outline: none;
}

.summer-form textarea {
  min-height: 96px;
  padding: 12px;
  resize: vertical;
}

.summer-form input[readonly] {
  background: #f4f7fb;
  color: var(--summer-muted);
}

.summer-toolbar select:focus,
.summer-form input:focus,
.summer-form select:focus,
.summer-form textarea:focus {
  border-color: rgba(37, 99, 235, 0.55);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.10);
}

.summer-primary-btn,
.summer-ghost-btn,
.summer-danger-btn {
  min-height: 44px;
  padding: 0 16px;
  border: 0;
  border-radius: var(--summer-radius);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  white-space: nowrap;
}

.summer-primary-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--summer-blue), var(--summer-blue-dark));
}

.summer-ghost-btn {
  color: var(--summer-ink);
  background: #e9eef8;
}

.summer-danger-btn {
  color: #fff;
  background: var(--summer-red);
}

.summer-primary-btn:disabled,
.summer-ghost-btn:disabled,
.summer-danger-btn:disabled {
  cursor: not-allowed;
  opacity: 0.72;
}

.summer-workspace {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.summer-editor {
  position: sticky;
  top: 14px;
  display: grid;
  gap: 16px;
  padding: 20px;
}

.summer-editor-head h2 {
  margin: 4px 0 0;
  font-size: 22px;
}

.summer-form {
  display: grid;
  gap: 14px;
}

.summer-form-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr;
  gap: 10px;
}

.summer-date-picker-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
}

.summer-date-picker-row .summer-ghost-btn {
  min-height: 44px;
  padding: 0 12px;
}

.summer-pending-details {
  display: grid;
  gap: 8px;
  min-height: 44px;
}

.summer-pending-empty {
  border: 1px dashed #cbd5e1;
  border-radius: 8px;
  color: var(--summer-muted);
  font-size: 13px;
  line-height: 1.55;
  padding: 10px 12px;
}

.summer-pending-head,
.summer-pending-item {
  align-items: center;
  display: grid;
  gap: 8px;
  grid-template-columns: minmax(0, 1fr) auto;
}

.summer-pending-head {
  color: var(--summer-muted);
  font-size: 13px;
  font-weight: 800;
}

.summer-pending-list {
  display: grid;
  gap: 6px;
}

.summer-pending-item {
  background: #f8fafc;
  border: 1px solid #dbe4f0;
  border-radius: 8px;
  grid-template-columns: minmax(0, 1fr) auto auto;
  padding: 8px;
}

.summer-pending-item span,
.summer-pending-item strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.summer-pending-item .summer-danger-btn {
  min-height: 32px;
  padding: 0 10px;
}

.summer-form-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.summer-form-message {
  min-height: 22px;
  margin: 0;
  color: var(--summer-muted);
  font-size: 14px;
  line-height: 1.6;
}

.summer-form-message.is-error {
  color: var(--summer-red);
  font-weight: 800;
}

.summer-form-message.is-success {
  color: var(--summer-green);
  font-weight: 800;
}

.summer-calendar-panel {
  padding: 18px;
  min-width: 0;
}

.summer-summary-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.summer-summary-row div {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.summer-summary-row span,
#summerScheduleMessage {
  color: var(--summer-muted);
  font-size: 14px;
}

.summer-summary-row strong {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  color: var(--summer-green);
  background: #e6f7f1;
}

#summerScheduleMessage.is-error {
  color: var(--summer-red);
  font-weight: 800;
}

.summer-calendar {
  display: grid;
  gap: 18px;
}

.summer-month {
  min-width: 0;
}

.summer-month-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.summer-month-head h2 {
  margin: 0;
  font-size: 22px;
}

.summer-month-head span {
  color: var(--summer-muted);
  font-size: 13px;
  font-weight: 800;
}

.summer-weekdays,
.summer-days {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.summer-weekdays {
  gap: 6px;
  margin-bottom: 6px;
}

.summer-weekdays span {
  min-height: 28px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  color: var(--summer-muted);
  font-size: 12px;
  font-weight: 800;
}

.summer-days {
  gap: 6px;
}

.summer-day {
  min-height: 148px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  border: 1px solid #d8e0ee;
  border-radius: var(--summer-radius);
  background: #fff;
  cursor: pointer;
}

.summer-day:hover,
.summer-day.is-selected {
  border-color: rgba(37, 99, 235, 0.65);
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.16), 0 10px 18px rgba(37, 99, 235, 0.08);
}

.summer-day.is-empty {
  cursor: default;
  background: transparent;
  border-color: transparent;
  box-shadow: none;
}

.summer-day-number {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 12px;
  font-weight: 800;
}

.summer-day-number small {
  color: var(--summer-muted);
  font-size: 11px;
  font-weight: 700;
}

.summer-events {
  display: grid;
  align-content: start;
  gap: 3px;
}

.summer-event {
  position: relative;
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  column-gap: 5px;
  row-gap: 2px;
  min-height: 30px;
  padding: 4px 5px 4px 7px;
  border-left: 4px solid var(--teacher-accent, var(--summer-blue));
  border-radius: 5px;
  background: var(--teacher-bg, #edf4ff);
  color: var(--summer-ink);
  cursor: pointer;
}

.summer-event:hover {
  box-shadow: inset 0 0 0 1px var(--teacher-accent, var(--summer-blue));
}

.summer-event-time {
  grid-column: 1 / -1;
  color: var(--teacher-text, var(--summer-blue-dark));
  font-size: 11px;
  font-weight: 900;
  line-height: 1.1;
}

.summer-event-student {
  grid-column: 1 / -1;
  min-width: 0;
  overflow: visible;
  overflow-wrap: anywhere;
  color: var(--summer-ink);
  font-size: 12px;
  font-weight: 900;
  line-height: 1.2;
  text-overflow: clip;
  white-space: normal;
}

.summer-event-meta {
  grid-column: 1 / -1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.summer-event-teacher {
  flex: 0 0 auto;
  max-width: 58%;
  overflow: hidden;
  padding: 1px 5px;
  border-radius: 999px;
  color: var(--teacher-text, var(--summer-blue-dark));
  background: var(--teacher-chip, #dbeafe);
  font-size: 10px;
  font-weight: 900;
  line-height: 1.45;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.summer-event-location {
  min-width: 0;
  overflow: hidden;
  color: var(--summer-muted);
  font-size: 10px;
  font-weight: 700;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.summer-event-note {
  grid-column: 1 / -1;
  display: none;
  overflow: hidden;
  color: var(--summer-muted);
  font-size: 10px;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.summer-event:hover .summer-event-note,
.summer-event:focus-within .summer-event-note {
  display: block;
}

.summer-event-actions {
  position: absolute;
  right: 4px;
  bottom: 4px;
  display: flex;
  gap: 3px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s ease;
}

.summer-event:hover .summer-event-actions,
.summer-event:focus-within .summer-event-actions {
  opacity: 1;
  pointer-events: auto;
}

.summer-event-actions button {
  min-height: 20px;
  padding: 0 5px;
  border-radius: 5px;
  font-size: 10px;
}

.summer-empty-state {
  padding: 24px;
  border: 1px dashed #cfd8e8;
  border-radius: var(--summer-radius);
  color: var(--summer-muted);
  background: #fff;
}

@media (max-width: 1180px) {
  .summer-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .summer-toolbar-controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .summer-toolbar-controls .summer-ghost-btn {
    grid-column: span 2;
  }

  .summer-workspace {
    grid-template-columns: 1fr;
  }

  .summer-editor {
    position: static;
  }
}

@media (max-width: 760px) {
  .summer-shell {
    width: min(100vw - 14px, 100%);
    margin: 8px auto 20px;
  }

  .summer-toolbar,
  .summer-editor,
  .summer-calendar-panel {
    padding: 14px;
  }

  .summer-toolbar-controls,
  .summer-form-grid {
    grid-template-columns: 1fr;
  }

  .summer-toolbar-controls .summer-ghost-btn {
    grid-column: auto;
  }

  .summer-summary-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .summer-weekdays {
    display: none;
  }

  .summer-days {
    grid-template-columns: 1fr;
  }

  .summer-day.is-empty {
    display: none;
  }

  .summer-day {
    min-height: 104px;
  }
}