/* ===== Content Area ===== */
#content-area {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px;
  width: 100%;
  flex: 1;
  min-height: 50vh;
}

/* ===== Page Pagination (Prev/Next) ===== */
#page-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 60px;
  padding: 32px 24px 48px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.pagination-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  color: var(--color-primary-light);
  transition: all var(--transition);
  border-radius: 50%;
}

.pagination-arrow:hover {
  color: var(--color-accent);
  transform: scale(1.1);
}

.pagination-arrow:disabled {
  color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: 0.4;
  transform: none;
}

.pagination-arrow svg {
  width: 48px;
  height: 48px;
}

/* ===== Register Center ===== */
.register-center-title {
  margin-bottom: 24px;
}

.register-center-layout {
  display: flex;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  min-height: 420px;
}

.register-center-sidebar {
  width: 220px;
  background: var(--color-off-white);
  border-right: 1px solid var(--color-border);
  padding: 12px 0;
}

.register-center-menu-item {
  width: 100%;
  text-align: left;
  padding: 14px 20px;
  font-size: 0.98rem;
  color: var(--color-text);
  transition: background var(--transition), color var(--transition);
}

.register-center-menu-item:hover {
  background: #eaf1f8;
}

.register-center-menu-item.active {
  background: var(--color-primary-light);
  color: var(--color-white);
}

.register-center-main {
  flex: 1;
  padding: 28px 28px 36px;
}

.register-center-panel {
  display: none;
}

.register-center-panel.active {
  display: block;
}

.register-panel-title {
  text-align: center;
  margin-bottom: 24px;
}

.register-invite-label {
  font-size: 1rem;
  text-align: center;
  margin-bottom: 14px;
  color: var(--color-text);
}

.register-invite-row {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  gap: 10px;
}

.register-invite-input {
  flex: 1;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0 14px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.register-invite-input:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(41, 128, 185, 0.15);
}

.register-invite-verify {
  height: 44px;
  min-width: 100px;
  padding: 0 20px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  color: var(--color-white);
  font-weight: 600;
  transition: background var(--transition), opacity var(--transition);
}

.register-invite-verify:hover:not(:disabled) {
  background: var(--color-accent-hover);
}

.register-invite-verify:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.register-invite-message {
  max-width: 640px;
  margin: 10px auto 0;
  font-size: 0.92rem;
}

.register-invite-message.error {
  color: var(--color-error);
}

.register-invite-message.success {
  color: var(--color-success);
}

.register-center-empty {
  text-align: center;
  color: var(--color-text-light);
  margin-top: 20px;
}

.register-form-page {
  min-height: 320px;
}

.register-form-placeholder {
  margin-top: 16px;
  color: var(--color-text-light);
}

@media (max-width: 768px) {
  .register-center-layout {
    flex-direction: column;
    min-height: auto;
  }

  .register-center-sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    padding: 0;
  }

  .register-center-menu-item {
    flex: 1;
    text-align: center;
    padding: 12px 8px;
  }

  .register-center-main {
    padding: 20px 16px 24px;
  }

  .register-invite-row {
    flex-direction: column;
  }

  .register-invite-verify {
    width: 100%;
  }
}