.shift-matrix-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

.shift-matrix-modal.is-open {
  display: flex;
}

.shift-matrix-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
}

.shift-matrix-modal__content {
  position: relative;
  background: #ffffff;
  border-radius: 16px;
  width: min(300px, 92vw);
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.2);
}

.shift-matrix-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid #e5e7eb;
}

.shift-matrix-modal__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: #111827;
  white-space: pre-line;
}

.shift-matrix-modal__title span {
  font-size: 12px;
  font-weight: 500;
  color: #6b7280;
}

.shift-matrix-modal__close {
  background: transparent;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: #6b7280;
}

.shift-matrix-modal__body {
  padding: 16px 20px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.shift-matrix-modal__section-title {
  font-weight: 700;
  margin-bottom: 8px;
  color: #111827;
}

.shift-matrix-modal__times {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.shift-matrix-modal__time-row {
  display: grid;
  grid-template-columns: minmax(0, 104px) minmax(0, 1fr) auto;
  align-items: start;
  gap: 8px;
}

.shift-matrix-modal__time-input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
}

.shift-matrix-modal__time-input.is-error {
  border-color: #ef4444;
  background: #fef2f2;
}

.shift-matrix-modal__work-note {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
}

.shift-matrix-modal__remove-time {
  border: none;
  background: #fee2e2;
  color: #b91c1c;
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 12px;
  align-self: center;
}

.shift-matrix-modal__time-hint {
  margin-top: 4px;
  font-size: 12px;
  color: #6b7280;
}

.shift-matrix-modal__add-time {
  border: 1px dashed #9ca3af;
  background: #f9fafb;
  color: #111827;
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 13px;
  margin-top: 6px;
}

.shift-matrix-modal__memo {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
}

.shift-matrix-modal__error {
  color: #dc2626;
  font-size: 13px;
  min-height: 18px;
}

.shift-matrix-modal__footer {
  padding: 12px 20px 16px;
  border-top: 1px solid #e5e7eb;
  display: flex;
  justify-content: flex-end;
}

.shift-matrix-modal__save {
  background: #2563eb;
  color: #ffffff;
  border: none;
  border-radius: 10px;
  padding: 8px 16px;
  font-weight: 600;
  cursor: pointer;
}

.shift-matrix-modal__save:disabled {
  background: #9ca3af;
  cursor: not-allowed;
}